COHU


Line plots across dimensions of each concept
Line plots across concepts
Tables

Table of contents



us-gaap:CommonStockValue

us-gaap:CommonStockSharesIssued

us-gaap:CommonStockSharesOutstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic

us-gaap:AllocatedShareBasedCompensationExpense
us-gaap:IncomeStatementLocation

us-gaap:ComprehensiveIncomeNetOfTax

us-gaap:ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest

us-gaap:CostDepreciationAmortizationAndDepletion

us-gaap:CostOfGoodsAndServiceExcludingDepreciationDepletionAndAmortization

us-gaap:CostOfGoodsAndServicesSold

us-gaap:CostsAndExpenses

us-gaap:GainsLossesOnExtinguishmentOfDebt
us-gaap:DebtInstrument
us-gaap:ConsolidationItems
us-gaap:GeneralAndAdministrativeExpense

us-gaap:IncomeLossFromContinuingOperations

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments

us-gaap:IncomeTaxExpenseBenefit

us-gaap:IncomeTaxesPaidNet

us-gaap:InterestExpense

us-gaap:InterestPaidNet

us-gaap:NetIncomeLoss
us-gaap:StatementEquityComponents

us-gaap:OperatingIncomeLoss

us-gaap:OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax

us-gaap:OtherComprehensiveIncomeLossNetOfTax

us-gaap:ProfitLoss

us-gaap:ResearchAndDevelopmentExpense

us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax
us-gaap:ProductOrService, us-gaap:StatementBusinessSegments
us-gaap:StatementBusinessSegments
us-gaap:StatementGeographical

us-gaap:SellingGeneralAndAdministrativeExpense

us-gaap:Assets
us-gaap:ConsolidationItems
us-gaap:StatementBusinessSegments

us-gaap:LiabilitiesAndStockholdersEquity

us-gaap:StockholdersEquity
us-gaap:StatementEquityComponents

us-gaap:AssetsCurrent

us-gaap:CashAndCashEquivalentsAtCarryingValue

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

us-gaap:InventoryNet

us-gaap:OtherAssetsCurrent

us-gaap:PropertyPlantAndEquipmentGross
us-gaap:PropertyPlantAndEquipmentByType

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment

us-gaap:AmortizationOfIntangibleAssets

us-gaap:PropertyPlantAndEquipmentNet
us-gaap:StatementGeographical

us-gaap:Goodwill
us-gaap:ReportingUnit
us-gaap:IndefiniteLivedIntangibleAssetsByMajorClass
us-gaap:IndefiniteLivedIntangibleAssetsExcludingGoodwill

us-gaap:IntangibleAssetsNetExcludingGoodwill

us-gaap:IntangibleAssetsNetIncludingGoodwill
us-gaap:StatementGeographical

us-gaap:OperatingLeaseRightOfUseAsset

us-gaap:OtherAssetsNoncurrent

us-gaap:AccountsPayableCurrent

us-gaap:AccruedIncomeTaxesCurrent

us-gaap:ContractWithCustomerLiabilityCurrent

us-gaap:LiabilitiesCurrent

us-gaap:LongTermDebtCurrent
us-gaap:DebtInstrument
us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:OperatingLeaseLiabilityCurrent
us-gaap:BalanceSheetLocation

us-gaap:OtherAccruedLiabilitiesCurrent

us-gaap:LongTermDebt
us-gaap:DebtInstrument
us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:LongTermDebtNoncurrent

us-gaap:DeferredIncomeTaxLiabilitiesNet

us-gaap:OperatingLeaseLiabilityNoncurrent
us-gaap:BalanceSheetLocation

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive

us-gaap:OperatingLeaseLiability
us-gaap:BalanceSheetLocation

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount

us-gaap:StockholdersEquity
us-gaap:StatementEquityComponents

us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
us-gaap:StatementEquityComponents

us-gaap:CommonStockValue

us-gaap:AdditionalPaidInCapitalCommonStock

us-gaap:RetainedEarningsAccumulatedDeficit

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax

us-gaap:StockIssuedDuringPeriodValueNewIssues
us-gaap:StatementEquityComponents

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue
us-gaap:StatementEquityComponents

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect

us-gaap:AmortizationOfFinancingCosts

us-gaap:DeferredIncomeTaxExpenseBenefit

us-gaap:DepreciationDepletionAndAmortization

us-gaap:IncreaseDecreaseInAccountsPayable

us-gaap:IncreaseDecreaseInAccountsReceivable

us-gaap:IncreaseDecreaseInInventories

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetIncomeLoss
us-gaap:StatementEquityComponents

us-gaap:ProfitLoss

us-gaap:ShareBasedCompensation

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:ProceedsFromIssuanceOfLongTermDebt
us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:RepaymentsOfLongTermDebt
us-gaap:DebtInstrument
us-gaap:DebtInstrument, us-gaap:SubsequentEventType

us-gaap:PaymentsOfDividendsCommonStock
us-gaap:DebtInstrument
us-gaap:DebtInstrumentInterestRateStatedPercentage
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:Range, us-gaap:DebtInstrument

us-gaap:EffectiveIncomeTaxRateContinuingOperations

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber

us-gaap:DeferredTaxLiabilities

us-gaap:DeferredTaxAssetsNet

us-gaap:UnrecognizedTaxBenefits

us-gaap:DeferredTaxAssetsValuationAllowance

cohu:AmortizationOfInventoryStepupAndInventoryRelatedCharges

cohu:CapitalizedCloudComputingServiceCostsButNotYetPaid
us-gaap:DebtInstrument
cohu:ExtinguishmentOfDebtDecreaseDeferredFinancingCosts

cohu:IncreaseDecreaseInAccruedCompensationWarrantyAndOtherLiabilities

cohu:IncreaseDecreaseInCurrentAndNoncurrentOperatingLeaseLiabilities

cohu:IncreaseDecreaseInDeferredProfit

cohu:IncreaseDecreaseInOperatingLeaseRightOfUseAssets

cohu:InterestCapitalizedAssociatedWithCloudComputingImplementation

cohu:InventoryCapitalizedAsPropertyPlantAndEquipment

cohu:IssuanceRepurchaseOfCommonStockNet

cohu:ProfitLossFromOperatingSegment
us-gaap:StatementBusinessSegments

cohu:StandardAndExtendedProductWarrantyAccrualDecreaseForDisposals

cohu:TransferFromInProcessTechnologyToDevelopedTechnology

us-gaap:AllocatedShareBasedCompensationExpenseNetOfTax

us-gaap:AmortizationOfFinancingCostsAndDiscounts

us-gaap:CapitalExpendituresIncurredButNotYetPaid

us-gaap:CapitalizedComputerSoftwareAmortization1
us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation, us-gaap:IncomeStatementLocation
us-gaap:DerivativeGainLossOnDerivativeNet

us-gaap:DiscontinuedOperationGainLossFromDisposalOfDiscontinuedOperationBeforeIncomeTax

us-gaap:DiscontinuedOperationIncomeLossFromDiscontinuedOperationBeforeIncomeTax

us-gaap:DiscontinuedOperationTaxEffectOfDiscontinuedOperation

us-gaap:DisposalGroupIncludingDiscontinuedOperationOperatingIncomeLoss

us-gaap:DisposalGroupIncludingDiscontinuedOperationRevenue

us-gaap:DividendsCommonStockCash
us-gaap:StatementEquityComponents

us-gaap:EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations

us-gaap:EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense
us-gaap:DebtInstrument
us-gaap:ExtinguishmentOfDebtAmount
us-gaap:LongtermDebtType

us-gaap:FinanceLeaseInterestExpense

us-gaap:FinanceLeaseInterestPaymentOnLiability

us-gaap:FinanceLeasePrincipalPayments

us-gaap:FinanceLeaseRightOfUseAssetAmortization

us-gaap:ForeignCurrencyTransactionGainLossBeforeTax

us-gaap:ForeignCurrencyTransactionGainLossRealized

us-gaap:GainLossOnDispositionOfAssets1

us-gaap:GainLossOnSaleOfBusiness
us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations

us-gaap:GainLossOnSaleOfPropertyPlantEquipment
us-gaap:LongLivedAssetsHeldForSaleByAssetType

us-gaap:GainLossOnSalesOfAssetsAndAssetImpairmentCharges

us-gaap:GoodwillForeignCurrencyTranslationGainLoss
us-gaap:ReportingUnit

us-gaap:ImpairmentOfIntangibleAssetsIndefinitelivedExcludingGoodwill
us-gaap:IndefiniteLivedIntangibleAssetsByMajorClass

us-gaap:IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity

us-gaap:IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare

us-gaap:IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare

us-gaap:IncreaseDecreaseInAccruedIncomeTaxesPayable

us-gaap:IncreaseDecreaseInContractWithCustomerLiability

us-gaap:IncreaseDecreaseInOtherAccruedLiabilities

us-gaap:IncreaseDecreaseInOtherCurrentAssets

us-gaap:IncreaseDecreaseInOtherNoncurrentAssets

us-gaap:InvestmentIncomeInterestAndDividend

us-gaap:LeaseCost

us-gaap:NetIncomeLossIncludingPortionAttributableToNonredeemableNoncontrollingInterest
us-gaap:StatementEquityComponents

us-gaap:OperatingLeaseCost

us-gaap:OperatingLeasePayments

us-gaap:OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent
us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationReclassificationAdjustmentFromAOCIRealizedUponSaleOrLiquidationNetOfTax
us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent

us-gaap:OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax
us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax
us-gaap:StatementEquityComponents
us-gaap:RestructuringCostAndReserve, us-gaap:RestructuringPlan
us-gaap:PaymentsForRestructuring

us-gaap:PaymentsToAcquireShortTermInvestments

us-gaap:PensionAndOtherPostretirementBenefitExpense

us-gaap:ProceedsFromConstructionLoansPayable

us-gaap:ProceedsFromDivestitureOfBusinessesNetOfCashDivested

us-gaap:ProceedsFromIssuanceOfCommonStock
us-gaap:SubsidiarySaleOfStock

us-gaap:ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities

us-gaap:ProceedsFromSalesOfAssetsInvestingActivities
us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
us-gaap:ProceedsFromSalesOfBusinessAffiliateAndProductiveAssets

us-gaap:ProductWarrantyAccrualPayments

us-gaap:ProductWarrantyAccrualWarrantiesIssued

us-gaap:RestructuringCharges
us-gaap:RestructuringCostAndReserve, us-gaap:RestructuringPlan
us-gaap:RestructuringPlan
us-gaap:RestructuringCostAndReserve, us-gaap:RestructuringPlan
us-gaap:RestructuringReserveTranslationAndOtherAdjustment

us-gaap:RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability

us-gaap:RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability
us-gaap:AwardType, us-gaap:Vesting
us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage

us-gaap:ShortTermLeaseCost

us-gaap:StockIssuedDuringPeriodValueEmployeeStockPurchasePlan
us-gaap:StatementEquityComponents
us-gaap:StatementEquityComponents
us-gaap:StockIssuedDuringPeriodValueRestrictedStockAwardGross

us-gaap:StockIssuedDuringPeriodValueStockOptionsExercised
us-gaap:StatementEquityComponents

us-gaap:StockRepurchasedAndRetiredDuringPeriodValue
us-gaap:StatementEquityComponents

us-gaap:SubleaseIncome

us-gaap:UnrecognizedTaxBenefitsPeriodIncreaseDecrease

us-gaap:VariableLeaseCost

us-gaap:WeightedAverageNumberDilutedSharesOutstandingAdjustment

cohu:AvailableForSaleSecuritiesDebtMaturitiesDueAfterOneYearThroughThreeYearsEstimatedFairValue

cohu:AvailableforsaleSecuritiesDebtMaturitiesYearTwoThroughThreeAmortizedCostBasis

cohu:DebtLongtermAndShorttermCombinedAmountGross

cohu:DeferredProfit

cohu:DeferredProfitLongterm

cohu:DeferredTaxAssetsInventoryAndWarrantyReserves

cohu:DeferredTaxAssetsLeaseLiabilities

cohu:DeferredTaxLiabilitiesAssetBasisDifferences

cohu:DeferredTaxLiabilitiesOperatingLeaseRightofuseAssets
us-gaap:RetirementPlanName
cohu:DefinedBenefitPlanExpectedFutureEmployeeAndEmployerContributionsNextTwelveMonths
us-gaap:RetirementPlanType
cohu:DefinedBenefitPlanHealthCareCostTrendRateAnnualRateOfChange

cohu:FinanceLeaseLiabilityToBePaidAfterYearFour

cohu:LeaseLiability

cohu:LeaseLiabilityNoncurrent

cohu:LeaseRightofuseAsset

cohu:LesseeLeaseLiabilityPaymentsDue

cohu:LesseeLeaseLiabilityPaymentsDueAfterYearFive

cohu:LesseeLeaseLiabilityPaymentsDueAfterYearFour

cohu:LesseeLeaseLiabilityPaymentsDueNextTwelveMonths

cohu:LesseeLeaseLiabilityPaymentsDueYearFive

cohu:LesseeLeaseLiabilityPaymentsDueYearFour

cohu:LesseeLeaseLiabilityPaymentsDueYearThree

cohu:LesseeLeaseLiabilityPaymentsDueYearTwo

cohu:LesseeLeaseLiabilityPaymentsRemainderOfFiscalYear

cohu:LesseeLeaseLiabilityUndiscountedExcessAmount

cohu:LesseeOperatingLeaseLiabilityToBePaidAfterYearFour

cohu:LesseeSubleaseIncomeReceivableYearTwo
us-gaap:PlanName
cohu:PercentageOfFairValueToDeterminePriceOfCommonStock
us-gaap:Range, us-gaap:AwardType
cohu:ShareBasedCompensationArrangementByShareBasedPaymentAwardPercentageOfSharesAvailableForIssue

us-gaap:AccountsAndOtherReceivablesNetCurrent

us-gaap:AccruedIncomeTaxesNoncurrent

us-gaap:AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax

us-gaap:AccumulatedOtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentNetOfTax

us-gaap:AllowanceForDoubtfulAccountsReceivable
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:AssetsFairValueDisclosure
us-gaap:FairValueByMeasurementFrequency
us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
us-gaap:AssetsOfDisposalGroupIncludingDiscontinuedOperation
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency, us-gaap:InvestmentType
us-gaap:AvailableForSaleSecurities
us-gaap:FairValueByMeasurementFrequency, us-gaap:InvestmentType

us-gaap:AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax
us-gaap:InvestmentType

us-gaap:AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax
us-gaap:InvestmentType

us-gaap:AvailableForSaleSecuritiesAmortizedCost
us-gaap:InvestmentType

us-gaap:AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue

us-gaap:AvailableForSaleSecuritiesCurrent
us-gaap:InvestmentType

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesSingleMaturityDate

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesSingleMaturityDateAmortizedCostBasis

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue

us-gaap:CapitalizedComputerSoftwareGross
us-gaap:CashAndCashEquivalents, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:CashAndCashEquivalentsFairValueDisclosure
us-gaap:CashAndCashEquivalents, us-gaap:FairValueByMeasurementFrequency

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations

us-gaap:CashSurrenderValueOfLifeInsurance
us-gaap:DebtInstrument
us-gaap:DebtInstrumentCarryingAmount
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:DebtInstrumentCollateralAmount

us-gaap:DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:DebtInstrumentUnusedBorrowingCapacityAmount

us-gaap:DecreaseInUnrecognizedTaxBenefitsIsReasonablyPossible

us-gaap:DeferredCompensationLiabilityCurrent

us-gaap:DeferredIncome

us-gaap:DeferredIncomeTaxLiabilities

us-gaap:DeferredRevenue

us-gaap:DeferredTaxAssetsGross

us-gaap:DeferredTaxAssetsOperatingLossCarryforwards

us-gaap:DeferredTaxAssetsOther

us-gaap:DeferredTaxAssetsTaxCreditCarryforwards

us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeBenefits

us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost

us-gaap:DeferredTaxLiabilitiesUndistributedForeignEarnings
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanAccumulatedBenefitObligation
us-gaap:RetirementPlanName
us-gaap:DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesAfterTax
us-gaap:RetirementPlanName
us-gaap:DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate
us-gaap:RetirementPlanType
us-gaap:RetirementPlanName
us-gaap:DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationRateOfCompensationIncrease
us-gaap:RetirementPlanName
us-gaap:DefinedBenefitPlanBenefitObligation
us-gaap:RetirementPlanName
us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter
us-gaap:RetirementPlanType
us-gaap:RetirementPlanName
us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths
us-gaap:RetirementPlanName
us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive
us-gaap:RetirementPlanType
us-gaap:RetirementPlanName
us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour
us-gaap:RetirementPlanType
us-gaap:RetirementPlanName
us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree
us-gaap:RetirementPlanName
us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo
us-gaap:RetirementPlanName
us-gaap:DefinedBenefitPlanFairValueOfPlanAssets
us-gaap:RetirementPlanName
us-gaap:DefinedBenefitPlanFundedStatusOfPlan
us-gaap:RetirementPlanType
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanHealthCareCostTrendRateAssumedNextFiscalYear
us-gaap:DefinedBenefitPlanByPlanAssetCategories, us-gaap:RetirementPlanName
us-gaap:DefinedBenefitPlanPlanAssetsTargetAllocationPercentage
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanUltimateHealthCareCostTrendRate1
us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation
us-gaap:DerivativeAssets
us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation, us-gaap:Position
us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
us-gaap:DisposalGroupIncludingDiscontinuedOperationGoodwill1
us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations
us-gaap:DisposalGroupIncludingDiscontinuedOperationIntangibleAssets

us-gaap:EmployeeRelatedLiabilitiesCurrent
us-gaap:AwardType
us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized

us-gaap:FinanceLeaseLiability

us-gaap:FinanceLeaseLiabilityCurrent
us-gaap:BalanceSheetLocation

us-gaap:FinanceLeaseLiabilityNoncurrent
us-gaap:BalanceSheetLocation

us-gaap:FinanceLeaseLiabilityPaymentsDue

us-gaap:FinanceLeaseLiabilityPaymentsDueNextTwelveMonths

us-gaap:FinanceLeaseLiabilityPaymentsDueYearThree

us-gaap:FinanceLeaseLiabilityPaymentsDueYearTwo

us-gaap:FinanceLeaseLiabilityPaymentsRemainderOfFiscalYear

us-gaap:FinanceLeaseRightOfUseAsset

us-gaap:FinanceLeaseRightOfUseAssetAccumulatedAmortization

us-gaap:FinanceLeaseWeightedAverageDiscountRatePercent

us-gaap:FiniteLivedIntangibleAssetsAccumulatedAmortization
us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFive

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFour

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearThree

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo

us-gaap:FiniteLivedIntangibleAssetsGross
us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:InventoryFinishedGoodsNetOfReserves

us-gaap:InventoryRawMaterialsAndSuppliesNetOfReserves

us-gaap:InventoryWorkInProcessNetOfReserves

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths

us-gaap:LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear

us-gaap:LineOfCredit
us-gaap:CreditFacility
us-gaap:CreditFacility
us-gaap:LineOfCreditFacilityMaximumBorrowingCapacity

us-gaap:LoansPayableToBankCurrent

us-gaap:LongTermDebtFairValue
us-gaap:DebtInstrument

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo

us-gaap:LongTermLoansFromBank

us-gaap:OperatingLeaseWeightedAverageDiscountRatePercent
us-gaap:IncomeTaxAuthority
us-gaap:OperatingLossCarryforwards

us-gaap:OtherAccruedLiabilitiesNoncurrent

us-gaap:PostemploymentBenefitsLiabilityNoncurrent

us-gaap:PrepaidExpenseCurrent

us-gaap:ProductWarrantyAccrual

us-gaap:ProductWarrantyAccrualClassifiedCurrent
us-gaap:BalanceSheetLocation
us-gaap:ProductWarrantyAccrualNoncurrent
us-gaap:RestructuringCostAndReserve, us-gaap:RestructuringPlan
us-gaap:RestructuringReserve

us-gaap:RevenueRemainingPerformanceObligation
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber

us-gaap:ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions
us-gaap:ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRange

us-gaap:ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions
us-gaap:ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRange
us-gaap:AwardType
us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueOutstanding

us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1

us-gaap:ShortTermBankLoansAndNotesPayable
us-gaap:IncomeTaxAuthority
us-gaap:TaxCreditCarryforwardAmount

us-gaap:UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued

us-gaap:UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate
us-gaap:ValuationAllowancesAndReservesType
us-gaap:ValuationAllowancesAndReservesBalance

Plots across concepts


IncomeStatement
Other Comprehensive Income Loss Net Of Tax
Expenses
Interest Expense
Balance Sheet
Operating Lease Right Of Use Asset
Assets
Operating Lease Right Of Use Asset
Current Assets
Other Assets Current
NonCurrent Assets
Other Assets Noncurrent
PropertyPlantAndEquipmentNet
Accumulated Depreciation Depletion And Amortization Property Plant And Equipment
Liabilities
Liabilities Current
Current Liabilities
Contract With Customer Liability Current
Noncurrent Liabilities
Accrued Income Taxes Noncurrent
Stockholders Equity
Accumulated Other Comprehensive Income Loss Net Of Tax
CashFlow
Net Cash Provided By Used In Financing Activities
NetCashProvidedByUsedInOperatingActivities
Foreign Currency Transaction Gain Loss Realized
NetCashProvidedByUsedInInvestingActivities
Payments To Acquire Property Plant And Equipment
NetCashProvidedByUsedInFinancingActivities
Net Cash Provided By Used In Financing Activities
Shares
Weighted Average Number Of Shares Outstanding Basic
LesseeOperatingLeaseLiabilityPaymentsDue
Lessee Operating Lease Liability Payments Remainder Of Fiscal Year
InventoryNet
Inventory Finished Goods Net Of Reserves

Tables

  2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-07-012017-06-242017-04-012017-03-252016-12-312016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282013-06-292013-03-302012-12-292012-09-292012-06-302012-03-312011-12-312011-09-242011-06-252011-03-262010-12-252010-09-252010-06-26
us-gaap:CommonStockValue ██▆▆▆▆▆▅▅▅▅▁▁▁▁▁48.59648.41142.1941.96241.86241.68641.39541.26541.141.01540.76328.90128.88328.79628.48928.213NA27.889NA27.27826.84226.71226.67726.58626.2426.12826.10825.90825.69225.53525.39825.24825.0824.94224.90824.71324.63224.48324.47324.36324.3324.16124.146NA23.989NANA
us-gaap:CommonStockSharesIssued ██▆▆▆▆▆▅▅▅▅▁▁▁▁▁48.59648.41142.1941.96241.86241.68641.39541.26541.141.01540.76328.90128.88328.79628.48928.213NA27.889NA27.27826.84226.71226.67726.58626.2426.12826.10825.90825.69225.53525.39825.24825.0824.94224.90824.71324.63224.48324.47324.36324.3324.16124.146NA23.989NANA
us-gaap:CommonStockSharesOutstanding ██▆▆▆▆▆▅▅▅▅▁▁▁▁▁48.59648.41142.1941.96241.86241.68641.39541.26541.141.01540.76328.90128.88328.79628.48928.213NA27.889NA27.27826.84226.71226.67726.58626.2426.12826.10825.90825.69225.53525.39825.24825.0824.94224.90824.71324.63224.48324.47324.36324.3324.16124.146NA23.989NANA
us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding █▁49.47445.482NA41.94741.84441.502NA41.22941.12540.872NA29.7729.65129.531NA29.105NA28.725NA28.252NA27.36727.35826.317NA26.79626.72225.751NA26.17425.79725.123NA24.92924.81724.657NA24.47924.43224.353NA24.47824.48424.483NA24.11124.086
us-gaap:WeightedAverageNumberOfSharesOutstandingBasic █▁48.55543.756NA41.94741.84441.502NA41.22941.12540.872NA28.94828.89328.602NA28.155NA27.708NA26.978NA26.76126.71126.317NA26.17526.05925.751NA25.48125.32425.123NA24.92924.81724.657NA24.47924.43224.353NA24.15824.10324.018NA23.80223.657
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 TTM Greenblatt ROC _ _█▅▄▃▃▃▃▃▃▃▁▄▄▄▄▄114.51735.7318.774-1.36-0.528-13.626-13.659-6.023-14.662-17.984-60.3716.77913.79810.0134.66610.418NA11.644NA8.023.0370.9963.364-1.7322.2252.2664.16-1.7052.0699.4081.045-3.418-6.466-11.96-4.896-12.929-5.705-2.607-2.065-3.7071.2052.665.8297.642NANANA
  2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-07-012017-06-242017-04-012017-03-252016-12-312016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282013-06-292013-03-302012-12-292012-09-292012-06-302012-03-312011-12-312011-09-242011-06-252011-03-262010-12-252010-09-252010-06-26
us-gaap:AllocatedShareBasedCompensationExpense ▅▅▆▅▅▆▅▅▆▆█▂▂▁▁▁3.5063.5233.9213.2993.4033.6113.2873.5063.6623.6934.5561.881.9481.6691.6711.86NA1.759NA1.7171.8671.6681.6511.9571.6741.6371.7461.6981.7551.5851.613NANANANANANA0.9591.251NANA0.9230.938NANANANA
us-gaap:ComprehensiveIncomeNetOfTax █▅▅▄▄▃▃▃▃▃▁▄▄▄▄▄95.61417.17531.9055.046-2.843-18.205-11.032-23.709-15.678-27.427-61.4314.3134.95611.8937.12411.343NA13.73NA10.741-6.7240.8252.2510.5770.678-3.0092.661-11.138-8.187-1.113.659-3.018-3.443-6.17-2.888-16.049-3.2070.429-7.073-0.597-1.825-1.4455.71213.462NANANA
us-gaap:ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest NANA31.9055.046-2.843-18.205-11.086-23.567-15.714-27.475-61.6794.3134.95611.893NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:CostDepreciationAmortizationAndDepletion ▁█7.0437.101NA7.4470.0072567.266NA7.5970.0076257.641NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:CostOfGoodsAndServiceExcludingDepreciationDepletionAndAmortization █▆▄▂▁▁▂▁▂▂140.146123.283111.11487.14783.12782.83787.93684.56587.60593.394NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:CostOfGoodsAndServicesSold NANA111.11487.14783.12782.83787.93684.56587.60593.394128.71851.78658.31655.59948.99356.06556.16656.73648.07348.84145.21246.03849.66946.33743.08744.71849.50946.30964.79361.26552.36644.61645.72245.44142.7240.43234.06539.62241.7437.75745.14748.45854.34960.88564.41155.98947.441
us-gaap:CostsAndExpenses ▃▆▆▄▄▄▅▄▅▅█▁▁▁▁▁130.286189.758183.581152.007144.612152.547155.67149.521164.673165.793231.00879.38586.01985.13779.42483.233NA82.222NA73.07767.65768.26372.98967.5161.25965.24671.05169.77394.09985.03376.80571.83571.13671.92267.1368.94556.41960.35561.46957.00365.35469.15375.06782.05886.40477.28565.942
us-gaap:GainsLossesOnExtinguishmentOfDebt ▇▁▇█0.0-1.761-0.0250.293NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:GainsLossesOnExtinguishmentOfDebt us-gaap:DebtInstrument cohu:SecuredTermLoanFacility█▁0.0-1.8NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:GeneralAndAdministrativeExpense us-gaap:ConsolidationItems us-gaap:CorporateNonSegment▃▃▁▁▂▃▂▂▂▃█▃▄▂3.3663.588-0.3750.460.8483.4512.4832.0761.5483.74114.9743.1625.1992.122NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:IncomeLossFromContinuingOperations █▅▄▃▃▃▃▃▃▃▁▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▃▃▃▃▃95.09627.60714.861-6.646-4.74-17.318-16.281-10.48-19.383-22.851-57.1164.80311.6488.1226.8958.75510.70810.7086.7636.7632.3060.2182.662-1.9112.291.3353.887-2.741.3376.9210.931-3.354-6.578-11.113-4.334-12.235NANANANANANANANANANANA
us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments █▅▄▃▃▃▃▃▃▃▁▄▄▄▄▄112.75531.18215.266-5.53-4.603-18.31-19.524-9.203-20.299-23.051-63.3827.10514.11610.2494.86610.592NA11.786NA8.1213.2061.0673.423-1.6892.252.2754.164-1.6992.0749.4141.05-3.403-6.454-11.944-4.88-12.919-5.658-1.868-1.976-3.6151.3072.7745.9457.75210.628.9089.065
us-gaap:IncomeTaxExpenseBenefit █▄▃▃▃▃▂▃▃▃▁▄▄▃▂▃17.6593.5750.4051.1160.137-0.992-3.2431.277-0.916-0.2-6.2662.3022.4682.127-2.0291.837NA1.078NA1.3580.9150.8490.7610.222-0.040.940.2771.0410.7372.4930.119-0.056-0.004-1.124-0.546-0.816-0.497-0.1190.133-0.3910.588-0.6020.8951.1781.1921.2972.367
us-gaap:IncomeTaxesPaidNet ▅▁▂▄▂▂▃▄█▅▄▂▁▄▄▁3.4680.2790.653.0191.4130.691.6672.5856.8933.7972.6940.9410.112.4983.354-0.021NA1.449NA2.3120.8310.8164.9130.2480.1610.120.169-0.703-0.0050.3850.2810.310.2350.1860.137-1.458-0.1220.599NANA0.631.351NANA1.1830.893NA
us-gaap:InterestExpense ▃▄▅▅▅▇▇▇██▇▁▁▁1.8312.5752.8553.0213.4564.4274.7675.05.2825.5074.9440.0110.0110.011NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:InterestPaidNet ▃▃▄▄▄█▁▆▆▆1.6482.5322.7092.7733.5347.3080.0264.7324.9585.13NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:NetIncomeLoss █▅▄▃▃▃▃▃▃▃▁▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▃▄▄▄▃▃▃▃▃▃▄▄▃▄▄▄▄▄▄▄95.09627.60714.861-6.646-4.74-17.276-17.266-10.468-19.323-22.643-56.7544.80311.6488.1226.8958.75510.4310.436.7636.7632.0890.2692.607-1.9111.9491.113-0.072-2.740.3747.5194.163-3.347-6.45-10.82-4.045-12.103-5.161-1.749-2.109-3.2240.7193.3765.056.5749.4287.6116.698
us-gaap:OperatingIncomeLoss █▅▄▃▃▃▃▃▃▃▁▄▄▄▄▄114.51735.7318.774-1.36-0.528-13.626-13.659-6.023-14.662-17.984-60.3716.77913.79810.0134.66610.418NA11.644NA8.023.0370.9963.364-1.7322.2252.2664.16-1.7052.0699.4081.045-3.418-6.466-11.96-4.896-12.929-5.705-2.607-2.065-3.7071.2052.665.8297.64210.4988.7818.927
us-gaap:OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax NANA14.66111.6921.897-0.9297.328-13.2763.684-5.262-5.47-0.475-6.8143.8541.372.57NA3.359NA4.046-8.5130.561-0.3422.505-1.246-4.2212.81-8.343-5.475-8.537-0.380.2851.5074.6351.13-4.0021.9692.132-4.9952.583-3.718-4.854NANANANANA
us-gaap:OtherComprehensiveIncomeLossNetOfTax NANA17.04411.6921.897-0.9296.234-13.2413.645-4.788-4.682-0.49-6.6923.771NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:ProfitLoss NANA14.861-6.646-4.74-17.276-17.32-10.326-19.359-22.687-56.9974.80311.6488.1226.8958.75510.43NA6.763NANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:ResearchAndDevelopmentExpense ███▇▆█▇▇▇██▂▂▂▂▁23.42323.15222.76220.49720.42422.46820.82320.48322.10822.73322.5211.08811.05111.77511.8869.609NA9.466NA9.77610.0998.6348.3057.8038.2068.6057.7319.62910.1829.67910.1811.17211.78211.63611.19213.469.9779.1368.6888.379.0398.8249.2849.0839.7418.7999.012
us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax █▇▆▅▄▄▄▄▅▅▅▂▃▃▂▃▃▃▂▂▂▂▂▂▁▂▂▂▃▃▂▂▂▁▂▁▁▁▁▁▂▂▂▂▃▂▂244.803225.488202.355150.647144.084138.921142.011143.498150.011147.809170.63786.16499.81795.1584.0993.65193.86693.86681.09781.09770.69469.25976.35365.77863.48467.51275.21168.06896.16894.44177.8568.41764.6759.96266.65256.01650.71457.74859.40453.29666.55971.81380.89689.796.90286.06674.869
us-gaap:SellingGeneralAndAdministrativeExpense ▅▅▅▅▄▅▅▅▆▆█▁▁▁▁▁32.83432.73933.58431.33630.94933.35234.53233.6936.42838.28645.82816.51116.65217.76317.87116.882NA16.02NA14.4612.34613.59115.01513.3713.16411.92313.81113.83514.12414.08914.25916.04713.63214.84513.21815.05312.37711.59711.04110.87611.16811.87111.43412.0912.25212.4979.489
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us-gaap:Assets █▇▆▆▆▆▆▆▆▆▆▁▁▁▁▁1371.7321258.7551090.3461046.3531066.5831072.1551077.711071.6091103.5041106.1971134.002443.006435.771422.718420.457404.464NA401.344NA378.767345.512347.488347.496352.814345.346332.486336.779335.482348.818365.372356.098342.094345.423341.12348.237346.998334.873348.575347.955356.025361.608371.084371.891NA366.043NANA
us-gaap:LiabilitiesAndStockholdersEquity █▇▆▆▆▆▆▆▆▆▆▁▁▁▁▁1371.7321258.7551090.3461046.3531066.5831072.1551077.711071.6091103.5041106.1971134.002443.006435.771422.718420.457404.464NA401.344NA378.767345.512347.488347.496352.814345.346332.486336.779335.482348.818365.372356.098342.094345.423341.12348.237346.998334.873348.575347.955356.025361.608371.084371.891NA366.043NANA
us-gaap:StockholdersEquity █▇▄▃▃▃▄▄▄▄▄▁▁▁▁▁850.231749.474512.288474.609466.758464.884483.072491.753514.805528.67546.243309.007304.463298.352289.091278.797NA264.548NA245.356235.469240.963239.837236.966238.137236.326239.167234.887247.068254.331254.268249.387253.16256.185262.456264.373280.899283.613283.659290.247291.031292.626294.463NA274.725NANA
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us-gaap:AssetsCurrent █▆▄▃▃▃▃▃▃▃▄▂▁▁▁▁826.597675.718485.046444.818456.25453.799439.696431.595442.807444.846485.239322.286316.446297.506297.438279.571NA276.451NA253.785245.149240.833239.585243.032234.463206.695208.733207.945214.817221.891203.81186.059186.848183.858195.069193.193221.083234.389234.751237.372243.816248.51244.306NA240.217NANA
us-gaap:CashAndCashEquivalentsAtCarryingValue █▂▂▃▂▃▂▂▂▂▂▃▁▁▂▁353.896143.119149.358169.926162.728171.474155.194145.094143.014159.521164.921170.695127.008115.136134.286121.984NA92.472NA83.83696.045109.217108.713104.945115.3789.2672.58868.60970.88560.57857.96940.04351.66846.24847.4441.393102.80875.6359.19350.46653.26251.14649.38848.80945.92132.84541.13
us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents NANANA169.926162.728NANA145.094143.014NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:InventoryNet ██▇▆▇▆▆▆▆▆▇▁▁▁▁▁155.85160.871142.5137.879141.811134.859130.706133.923137.229130.744139.31463.82463.13662.67662.08556.411NA60.347NA54.52345.50248.16750.81554.64451.34850.8753.21358.37155.54560.1461.46462.45458.97760.36167.66673.30162.33268.68572.96682.19582.68984.18576.656NA63.224NANA
us-gaap:OtherAssetsCurrent ▂▃▂▂▁▅▃▃▂▁▂▆█▇▆▆1.0463.241.8271.2730.9535.9983.1582.6691.1440.2581.6828.64310.9869.9248.6138.288NA11.344NA10.9178.5937.1728.1378.6576.2615.6678.0918.7919.18NANANANANANANANANANANANANANANANANANA
  2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-07-012017-06-242017-04-012017-03-252016-12-312016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282013-06-292013-03-302012-12-292012-09-292012-06-302012-03-312011-12-312011-09-242011-06-252011-03-262010-12-252010-09-252010-06-26
us-gaap:PropertyPlantAndEquipmentGross ▇▇█▇▇▇███▇█▁▁▁▁▁108.287112.78114.636113.082110.789108.272114.139115.554116.795113.093113.96168.78768.13468.61467.12966.821NA64.156NA62.61247.20347.21946.50245.6145.46673.31674.95283.88185.23786.18886.93889.44789.02887.33485.64684.59883.42382.76782.34982.73981.19982.50484.624NA84.804NANA
us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment ▆▇██▆▆▆▇▆▅▄▂▂▁▁▁43.26647.00447.7248.53644.98443.58443.22745.11545.01941.30139.62935.86534.59733.49232.95732.558NA31.313NA30.24528.96928.40727.83726.96226.46641.37243.99453.12753.38352.82752.64953.78752.80251.41950.04548.89547.95947.09846.79245.55644.21844.25745.618NA45.0NANA
us-gaap:AmortizationOfIntangibleAssets ▆▇▇▇▇▇▇▇▇▇█▁▁▁▁▁▁▁▁▁▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▁▁▁9.0459.2449.8989.7839.5279.5389.6159.9699.98710.01911.61.01.01.10.70.70.61.00.71.11.51.81.81.81.71.71.71.81.892.02.12.12.0822.61.71.71.0571.01.0NA1.0451.1NANANANANA
us-gaap:PropertyPlantAndEquipmentNet ▆▇▇▆▇▆▇▇███▁▁▁▁▁65.02165.77666.91664.54665.80564.68870.91270.43971.77671.79274.33232.92233.53735.12234.17234.263NA32.843NA32.36718.23418.81218.66518.64819.031.94430.95830.75431.85433.36134.28935.6636.22635.91535.60135.70335.46435.66935.55737.18336.98138.24739.006NA39.804NANA
us-gaap:Goodwill ▇████▇▇▇███▁▁▁▁▁226.577246.735252.304244.341238.95237.997238.669235.903241.466239.27242.12764.57964.76566.78465.61365.483NA66.038NA63.04858.84961.02860.75360.81460.26460.8661.29560.32663.13267.86571.07571.37571.31370.89576.85376.26558.75657.95757.10659.06658.0659.47861.361NA58.498NANA
 us-gaap:IndefiniteLivedIntangibleAssetsExcludingGoodwill us-gaap:IndefiniteLivedIntangibleAssetsByMajorClass cohu:InProcessTechnology▁▂▃▃▇▇█1.94.17.88.316.916.920.8NANANA36.3NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:IntangibleAssetsNetExcludingGoodwill ▅▆▆▆▆▇▇▇███▁▁▁▁▁203.417221.378233.685238.832252.208261.316275.019282.488297.211305.306318.96113.51214.49916.13116.74817.766NA18.742NA22.09717.83520.33822.08523.7825.29727.36730.1631.03633.08736.47241.10143.39145.31546.68239.83841.13418.97719.61119.27821.46421.82823.78926.166NA26.523NANA
us-gaap:IntangibleAssetsNetIncludingGoodwill NANA485.989NANANA513.688NANANA561.088NANANA82.361NANANANANA76.684NANANA85.561NANANA96.219NANANA116.628NANANA77.733NANANA79.888NANANANANANA
 us-gaap:IntangibleAssetsNetIncludingGoodwill us-gaap:StatementGeographical cohu:Malaysia1NANA45.435NANANA44.14NANANA43.569NANANA7.078NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:IntangibleAssetsNetIncludingGoodwill us-gaap:StatementGeographical cohu:RestOfTheWorldNANA7.866NANANA7.453NANANA8.977NANANA0.996NANANANANA0.953NANANA0.986NANANA0.984NANANANANANANANANANANANANANANANANANA
 us-gaap:IntangibleAssetsNetIncludingGoodwill us-gaap:StatementGeographical country:CHNANA5.006NANANA8.19NANANA11.604NANANA15.45NANANANANA18.264NANANA22.444NANANA25.921NANANA32.513NANANANANANANANANANANANANANA
 us-gaap:IntangibleAssetsNetIncludingGoodwill us-gaap:StatementGeographical country:DENANA232.925NANANA228.476NANANA249.605NANANA30.546NANANANANA26.892NANANA31.337NANANA38.527NANANA51.032NANANA53.19NANANANANANANANANANA
 us-gaap:IntangibleAssetsNetIncludingGoodwill us-gaap:StatementGeographical country:JPNANA3.703NANANA3.872NANANA4.138NANANA4.491NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:IntangibleAssetsNetIncludingGoodwill us-gaap:StatementGeographical country:SGNANA13.469NANANA13.915NANANA15.173NANANA6.558NANANANANA6.558NANANA6.558NANANA6.558NANANA6.558NANANA6.558NANANANANANANANANANA
 us-gaap:IntangibleAssetsNetIncludingGoodwill us-gaap:StatementGeographical country:USNANA177.585NANANA207.642NANANA228.022NANANA17.242NANANANANA17.242NANANA17.241NANANA17.241NANANA17.698NANANA17.985NANANANANANANANANANA
us-gaap:OperatingLeaseRightOfUseAsset ▁▄▃▄▅▆▆▇█▃26.8529.91729.20330.09931.46932.59933.26934.09635.22429.782NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:OtherAssetsNoncurrent █▆██▇▇▇▅▄▅▄▂▁▁▁▁23.2719.23123.19223.71721.90121.75620.0316.95814.95515.10713.2649.7076.5247.1756.4867.381NA7.27NA7.475.4456.4776.4086.546.3225.625.6335.4215.9285.7835.8235.6095.7213.770.8760.7030.5930.9491.2630.940.9231.061.052NA1.001NANA
  2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-07-012017-06-242017-04-012017-03-252016-12-312016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282013-06-292013-03-302012-12-292012-09-292012-06-302012-03-312011-12-312011-09-242011-06-252011-03-262010-12-252010-09-252010-06-26
us-gaap:AccountsPayableCurrent ██▅▃▄▃▃▃▃▃▃▂▂▂▂▁102.11197.71267.92349.36660.01253.45748.69748.12654.45346.99948.11739.7741.37340.9737.55629.907NA40.507NA37.72731.44425.69928.45533.1727.2925.84828.68130.47725.96434.42632.15626.94726.02318.7621.59418.38313.21718.4315.18516.42118.62522.46519.34NA18.198NANA
us-gaap:AccruedIncomeTaxesCurrent █▃▂▂▃▅▂▃▃▃▅▃▂▁▁▁19.1797.5863.8574.7955.57111.7953.8946.2666.0367.83111.0556.0723.9051.5462.1592.725NA2.22NA2.0891.921.7871.4184.4124.1954.964.5163.7323.1332.2641.0530.8460.8051.5151.972.0111.1092.5653.2663.122.5182.4573.856NA8.802NANA
us-gaap:ContractWithCustomerLiabilityCurrent ▁▄▄▂▅█▁▄▄▃▂7.68715.0114.4111.11617.74826.5947.616.216.713.910.8NANANA10.4NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LiabilitiesCurrent █▅▄▃▃▃▃▃▃▃▃▁▁▁▁▁321.312208.033174.453146.903159.041163.717148.885139.349146.931138.089160.58989.92586.54878.15185.26777.162NA85.621NA81.50268.68963.5364.5372.08663.19163.16763.7666.74669.55381.27771.10861.57461.01155.15758.42654.6436.3847.00846.43247.33451.87159.04557.541NA71.534NANA
us-gaap:LongTermDebtCurrent █▁▁▁▁▁▁▁▁▁▁105.6348.8518.3898.1997.9196.5666.5176.3826.4876.5826.676NANANA4.388NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:OperatingLeaseLiabilityCurrent NANANA5.0995.462NA5.458NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:OperatingLeaseLiabilityCurrent us-gaap:BalanceSheetLocation cohu:OtherAccruedLiabilities▁█▆4.7965.495.287NANA5.5925.458NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:OtherAccruedLiabilitiesCurrent ▄▄▄▃▄▄█▆▆▆█▂▂▁▁▁26.6726.42530.27523.3726.97929.08951.89938.91139.73238.96650.04515.98514.5429.95910.09810.526NA11.322NA12.499.9329.1378.93310.1018.5636.1346.0996.5717.1848.027.5287.8627.8158.3018.3889.1264.9526.7097.6068.4328.4546.9735.581NA6.973NANA
  2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-07-012017-06-242017-04-012017-03-252016-12-312016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282013-06-292013-03-302012-12-292012-09-292012-06-302012-03-312011-12-312011-09-242011-06-252011-03-262010-12-252010-09-252010-06-26
us-gaap:LongTermDebt NANA325.508NANANA360.476NANANA358.655NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:LongTermDebt us-gaap:DebtInstrument cohu:KitaTermLoans▁▂▃▃▃▃▄▅▆▆█3.33.43.63.73.73.73.84.04.24.34.6NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:LongTermDebt us-gaap:DebtInstrument cohu:SecuredTermLoanFacility▁▁▆▇███████200.6201.3301.1321.3337.9338.5339.1338.8339.4340.0340.6NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:LongTermDebt us-gaap:DebtInstrument,us-gaap:LongtermDebtType cohu:LoanFacilities,us-gaap:ConstructionLoans██▇▇▅▃▁10.310.39.99.58.46.65.5NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LongTermDebtNoncurrent ▁▄▇████████111.744211.182311.551331.469348.036346.877346.518344.92341.978342.632343.428NANANA4.575NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:DeferredIncomeTaxLiabilitiesNet ▃▁▅▅▄▆█27.47325.51828.81628.84227.61629.29731.31NANANA38.942NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:OperatingLeaseLiabilityNoncurrent NANANA26.29327.23428.10328.877NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:OperatingLeaseLiabilityNoncurrent us-gaap:BalanceSheetLocation cohu:LongtermLeaseLiabilities▁█▇23.64626.04125.565NANANA28.877NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo ▁▅█▆5.1775.7716.1875.932NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree ▁▅█▆4.8985.1395.2975.158NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour ██▃▁4.8234.824.7664.75NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive NANA4.428NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive NANA11.942NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-07-012017-06-242017-04-012017-03-252016-12-312016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282013-06-292013-03-302012-12-292012-09-292012-06-302012-03-312011-12-312011-09-242011-06-252011-03-262010-12-252010-09-252010-06-26
us-gaap:StockholdersEquity █▇▄▃▃▃▄▄▄▄▄▁▁▁▁▁850.231749.474512.288474.609466.758464.884483.072491.753514.805528.67546.243309.007304.463298.352289.091278.797NA264.548NA245.356235.469240.963239.837236.966238.137236.326239.167234.887247.068254.331254.268249.387253.16256.185262.456264.373280.899283.613283.659290.247291.031292.626294.463NA274.725NANA
us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest NANA512.288474.609466.758464.884483.072491.397514.449528.314545.944309.007304.463298.352289.091NANANANANA235.469NANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest us-gaap:StatementEquityComponents us-gaap:AccumulatedOtherComprehensiveIncomeNANA-4.326-21.37-33.062-34.959-34.03-40.26-27.019-30.664-25.88-21.198-20.708-14.016-17.787NANANANANA-27.882NANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest us-gaap:StatementEquityComponents us-gaap:AdditionalPaidInCapitalNANA448.194442.648439.943435.402433.19428.428425.609421.381419.69130.194128.248125.448127.663NANANANANA111.95NANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest us-gaap:StatementEquityComponents us-gaap:CommonStockNANA42.1941.96241.86241.68641.39541.26541.141.01540.76328.90128.88328.79628.489NANANANANA26.842NANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest us-gaap:StatementEquityComponents us-gaap:RetainedEarningsNANA26.2311.36918.01522.75542.51762.3275.11596.938111.67171.11168.04158.124150.726NANANANANA124.559NANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:CommonStockValue ██▆▆▆▆▆▅▅▅▅▁▁▁▁▁48.59648.41142.1941.96241.86241.68641.39541.26541.141.01540.76328.90128.88328.79628.48928.213NA27.889NA27.27826.84226.71226.67726.58626.2426.12826.10825.90825.69225.53525.39825.24825.0824.94224.90824.71324.63224.48324.47324.36324.3324.16124.146NA23.989NANA
us-gaap:AdditionalPaidInCapitalCommonStock ██▅▅▅▅▅▅▅▅▅▁▁▁▁▁666.942661.984448.194442.648439.943435.402433.19428.428425.609421.381419.69130.194128.248125.448127.663123.064NA118.799NA112.274111.95108.995107.127104.998105.516102.922101.20798.22197.93895.63293.06490.46789.88388.09986.73884.46883.54781.72780.74378.89977.65876.1475.098NA71.799NANA
us-gaap:RetainedEarningsAccumulatedDeficit ▇▃▂▁▁▁▂▃▄▅▅██▇▇▇148.93353.83726.2311.36918.01522.75542.51762.3275.11596.938111.67171.11168.04158.124150.726145.536NA138.464NA129.708124.559124.34125.673124.666128.153127.777128.231129.87134.152135.317129.33126.692131.546139.5151.816157.355170.937177.574180.792184.37189.055189.793187.866NA179.134NANA
us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax ▆▆█▅▂▂▂▁▄▃▄▅▅▆▅▅-14.24-14.758-4.326-21.37-33.062-34.959-34.03-40.26-27.019-30.664-25.88-21.198-20.708-14.016-17.787-18.016NA-20.604NA-23.904-27.882-19.084-19.64-19.284-21.772-20.501-16.379-19.112-10.714-2.1536.4766.986.6513.644-1.006-2.1631.783-0.171-2.3492.615-0.0122.5327.353NA-0.197NANA
us-gaap:StockIssuedDuringPeriodValueNewIssues ▁█0.0223.119NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:StockIssuedDuringPeriodValueNewIssues us-gaap:StatementEquityComponents us-gaap:AdditionalPaidInCapital▁█0.0217.426NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:StockIssuedDuringPeriodValueNewIssues us-gaap:StatementEquityComponents us-gaap:CommonStock▁█0.05.693NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue ▃▂▂▂▂▂▂▂▂▂█▁▁▁4.1343.5233.9213.2993.4033.6113.2873.5063.6623.69312.7841.8791.9481.669NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-07-012017-06-242017-04-012017-03-252016-12-312016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282013-06-292013-03-302012-12-292012-09-292012-06-302012-03-312011-12-312011-09-242011-06-252011-03-262010-12-252010-09-252010-06-26
us-gaap:NetCashProvidedByUsedInOperatingActivities █▄▇▅▂▆▅▄▁▄▄▇▅▁▆▇29.4786.14321.71414.731-4.52417.81313.8318.211-9.4934.725.2323.29215.192-9.27716.14126.401NA4.41NA-7.2026.00112.5857.421-1.459-3.0820.81-0.4654.21514.6596.0437.918-8.9421.5390.4547.927-6.5032.3824.9415.1710.6755.7033.855-4.7457.4258.4131.637NA
us-gaap:NetCashProvidedByUsedInInvestingActivities █▁185.039-129.857NA8.861-3.9281.465NA-4.242-4.065-3.521NA22.725-0.073-4.319-6.3483.146NA-0.317NA-3.525-13.172-11.227-0.511-8.00629.754-1.4883.794-1.0260.015-1.0510.166-0.4943.989-1.069-0.698-53.54826.18712.0565.954-3.031-1.1630.6255.693-5.9615.122-10.915NA
us-gaap:NetCashProvidedByUsedInFinancingActivities ▁▄▁▁▁▁▁▁▁▁█▁▁▁▁▁-3.089116.593-18.513-16.977-0.336-2.2460.2660.154-3.312-5.291331.673-1.937-1.104-6.5271.170.616NA3.392NA-3.033-0.634-1.365-2.74-1.968-0.535-1.469-0.209-2.769-0.863-0.441-0.603-2.269-1.08-1.285-0.368-0.419-2.423-1.354-0.759-1.227-1.141-1.314-0.564-0.845-0.6320.108NA
us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect █▁▁▂▁▂▂▂▁▁▁▃▂▁210.777-6.239-20.5687.198-8.74615.5449.662.506-16.577-4.58-5.77443.68711.872-19.15NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-07-012017-06-242017-04-012017-03-252016-12-312016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282013-06-292013-03-302012-12-292012-09-292012-06-302012-03-312011-12-312011-09-242011-06-252011-03-262010-12-252010-09-252010-06-26
us-gaap:AmortizationOfFinancingCosts ▁█████████0.20.30.30.30.30.30.30.30.30.3NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:DeferredIncomeTaxExpenseBenefit ▇▇▆▆▅▅█▆▃▅▁▆▆▇▄▆0.1790.28-0.111-0.339-2.149-2.7062.313-0.238-4.966-2.494-7.954-0.739-0.020.506-2.8590.054NA-0.275NA-0.7110.046-0.371-0.205-0.5351.3080.063-0.368-0.7810.819-0.583-0.308-0.415-0.567-0.296-0.043-0.7510.8430.086-0.325-0.023-0.263-0.728-0.254-0.431-0.666-0.629NA
us-gaap:DepreciationDepletionAndAmortization ▅▅▆▆▆▆▆▆▆▆█▁▁▁▁▁12.4312.56713.46313.24513.08212.95613.51815.2115.09915.04418.7712.4022.4172.4572.4642.392NA2.137NA2.2022.3232.7242.6962.6692.742.7572.8632.9133.2993.3543.4233.4523.3923.8583.0883.1312.3152.2122.4342.4422.4712.3832.4442.7692.8522.561NA
us-gaap:IncreaseDecreaseInAccountsPayable ▅█▆▁▄▃▃▂▄▂▁▂▃▃▄▁11.12528.48618.533-10.2636.7330.055-0.318-6.8237.499-3.48-8.14-2.8160.9332.927.777-10.654NA1.589NA5.4457.787-2.623-4.5395.0531.157-1.346-1.715.275-8.4622.275.5870.9257.263-2.8343.211-0.982-5.2133.195-1.236-2.204-3.843.1250.6370.505-9.6361.514NA
us-gaap:IncreaseDecreaseInAccountsReceivable ▆█▆▂▄▁▃▂▃▁▁▁▄▄▂▁32.87747.24133.238-6.58910.639-17.0780.607-7.0112.911-17.657-13.877-13.1978.13713.152-5.754-14.093NA7.326NA15.787.69-5.884-2.4475.2583.89-11.7915.102-6.171-12.89916.9845.1986.2012.59-2.2323.877-1.733-6.6351.3895.937-5.67-8.115-3.289-4.434-9.039-0.3212.064NA
us-gaap:IncreaseDecreaseInInventories ▄█▃▂▄▄▂▂▄▂▁▃▃▂▄▁4.82920.8043.583-1.7317.0636.067-0.686-1.8394.974-2.475-4.5981.1591.0580.3385.495-2.856NA4.827NA4.73-1.057-2.506-3.5632.5180.47-0.4091.2164.466-4.158-0.212.683.538-1.35-7.412-5.51.21-6.429-4.18-9.229-0.059-1.0087.8489.0524.973-1.6334.275NA
us-gaap:NetCashProvidedByUsedInOperatingActivities █▄▇▅▂▆▅▄▁▄▄▇▅▁▆▇29.4786.14321.71414.731-4.52417.81313.8318.211-9.4934.725.2323.29215.192-9.27716.14126.401NA4.41NA-7.2026.00112.5857.421-1.459-3.0820.81-0.4654.21514.6596.0437.918-8.9421.5390.4547.927-6.5032.3824.9415.1710.6755.7033.855-4.7457.4258.4131.637NA
us-gaap:NetIncomeLoss █▅▄▃▃▃▃▃▃▃▁▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▃▄▄▄▃▃▃▃▃▃▄▄▃▄▄▄▄▄▄▄95.09627.60714.861-6.646-4.74-17.276-17.266-10.468-19.323-22.643-56.7544.80311.6488.1226.8958.75510.4310.436.7636.7632.0890.2692.607-1.9111.9491.113-0.072-2.740.3747.5194.163-3.347-6.45-10.82-4.045-12.103-5.161-1.749-2.109-3.2240.7193.3765.056.5749.4287.6116.698
us-gaap:ProfitLoss NANA14.861-6.646-4.74-17.276-17.32-10.326-19.359-22.687-56.9974.80311.6488.1226.8958.75510.43NA6.763NANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:ShareBasedCompensation ▁█3.5063.523NA3.2993.4033.611NA3.5063.6623.69312.7821.881.9481.6691.6711.86NA1.759NA1.7171.8671.6681.6511.9571.6741.6371.7151.7291.7951.6221.6871.5171.5061.1861.3241.4211.3670.9591.2511.0441.3780.9230.9381.0481.00.962NA
  2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-07-012017-06-242017-04-012017-03-252016-12-312016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282013-06-292013-03-302012-12-292012-09-292012-06-302012-03-312011-12-312011-09-242011-06-252011-03-262010-12-252010-09-252010-06-26
us-gaap:NetCashProvidedByUsedInInvestingActivities █▁185.039-129.857NA8.861-3.9281.465NA-4.242-4.065-3.521NA22.725-0.073-4.319-6.3483.146NA-0.317NA-3.525-13.172-11.227-0.511-8.00629.754-1.4883.794-1.0260.015-1.0510.166-0.4943.989-1.069-0.698-53.54826.18712.0565.954-3.031-1.1630.6255.693-5.9615.122-10.915NA
us-gaap:PaymentsToAcquirePropertyPlantAndEquipment ▄▄▆▇█▂▆▆▆▅▃▁▁▂▂▃2.8492.75.1015.5966.3791.5844.6534.954.8713.5262.4950.6120.7861.0741.3542.324NA0.985NA1.430.6551.030.8720.8952.8991.4881.1281.0710.4190.1350.3760.731.3951.261.0440.2090.8511.1270.3320.9570.1230.8580.2450.1871.1931.395NA
  2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-07-012017-06-242017-04-012017-03-252016-12-312016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282013-06-292013-03-302012-12-292012-09-292012-06-302012-03-312011-12-312011-09-242011-06-252011-03-262010-12-252010-09-252010-06-26
us-gaap:NetCashProvidedByUsedInFinancingActivities ▁▄▁▁▁▁▁▁▁▁█▁▁▁▁▁-3.089116.593-18.513-16.977-0.336-2.2460.2660.154-3.312-5.291331.673-1.937-1.104-6.5271.170.616NA3.392NA-3.033-0.634-1.365-2.74-1.968-0.535-1.469-0.209-2.769-0.863-0.441-0.603-2.269-1.08-1.285-0.368-0.419-2.423-1.354-0.759-1.227-1.141-1.314-0.564-0.845-0.6320.108NA
us-gaap:ProceedsFromIssuanceOfLongTermDebt NANANA1.533NANANA3.72NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:ProceedsFromIssuanceOfLongTermDebt us-gaap:DebtInstrument,us-gaap:LongtermDebtType cohu:SecondFacility,us-gaap:ConstructionLoansNANA0.10.71.62.5NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:RepaymentsOfLongTermDebt ▁█▂▂▁▁▁▁2.889101.92220.8118.0841.0291.1330.2190.987NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:PaymentsOfDividendsCommonStock NANA0.00.02.4882.4832.4682.4662.452.4431.7321.7331.7121.7721.6831.673NA1.615NA1.6061.6031.61.5751.5731.5671.5661.5431.5391.5321.5241.5071.5041.4961.494NANA2.9451.4681.4621.4581.451.4481.4431.4361.4321.423NA
  2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-07-012017-06-242017-04-012017-03-252016-12-312016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282013-06-292013-03-302012-12-292012-09-292012-06-302012-03-312011-12-312011-09-242011-06-252011-03-262010-12-252010-09-252010-06-26
 us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:DebtInstrument cohu:XcerraTermLoanNANA2.35e-062.35e-062.35e-082.35e-082.35e-082.35e-082.35e-082.35e-082.35e-08NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:DebtInstrument,us-gaap:LongtermDebtType cohu:SecondFacility,us-gaap:ConstructionLoansNA1.0500000000000001e-06NA1.0500000000000001e-061.0500000000000001e-081.0500000000000001e-08NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:DebtInstrument,us-gaap:LongtermDebtType cohu:ThirdFacility,us-gaap:ConstructionLoans████▁1.2e-061.2e-061.2e-061.2e-061.2e-08NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:Range,us-gaap:DebtInstrument srt:Maximum,cohu:KitaTermLoans███▇▁▁▁▁▁▁▁4.4e-074.3e-074.4e-074.0000000000000003e-074e-094.3e-094.3e-094.4000000000000005e-094.5e-094.5e-094.5e-09NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:Range,us-gaap:DebtInstrument srt:Minimum,cohu:KitaTermLoans████▁▁▁▁▁▁▁5.0000000000000004e-085.0000000000000004e-085.0000000000000004e-085.0000000000000004e-085e-105e-105e-105e-105e-105e-105e-10NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA

Common Stock Value

us-gaap:CommonStockValue

us-gaap:CommonStockValue


Common
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-312016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282013-06-292013-03-302012-12-292012-09-292012-06-302012-03-312011-12-312011-09-242011-06-252010-12-25
Value484842414141414141414028282828282727262626262626262525252525252424242424242424242423
Percentage of CommonStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets3.53.83.94.03.93.93.83.93.73.73.66.56.66.86.87.06.97.27.87.77.77.57.67.97.87.77.47.07.17.47.37.37.27.17.47.07.06.86.76.56.56.6

Common Stock Shares Issued

us-gaap:CommonStockSharesIssued

us-gaap:CommonStockSharesIssued


Common
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-312016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282013-06-292013-03-302012-12-292012-09-292012-06-302012-03-312011-12-312011-09-242011-06-252010-12-25
Value484842414141414141414028282828282727262626262626262525252525252424242424242424242423
Percentage of CommonStockSharesIssued100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Common Stock Shares Outstanding

us-gaap:CommonStockSharesOutstanding

us-gaap:CommonStockSharesOutstanding


Common
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-312016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282013-06-292013-03-302012-12-292012-09-292012-06-302012-03-312011-12-312011-09-242011-06-252010-12-25
Value484842414141414141414028282828282727262626262626262525252525252424242424242424242423
Percentage of CommonStockSharesOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Weighted Average Number Of Diluted Shares Outstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding


Weighted
Period End2021-06-262021-03-272020-09-262020-06-272020-03-282019-09-282019-06-292019-03-302018-09-292018-06-302018-03-312017-09-302017-06-242017-03-252016-09-242016-06-252016-03-262015-09-262015-06-272015-03-282014-09-272014-06-282014-03-292013-09-282013-06-292013-03-302012-09-292012-06-302012-03-312011-09-242011-06-252011-03-262010-09-252010-06-26
Value49454141414141402929292928282727262626252625252424242424242424242424
Percentage of WeightedAverageNumberOfDilutedSharesOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Weighted Average Number Of Shares Outstanding Basic

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic


Weighted
Period End2021-06-262021-03-272020-09-262020-06-272020-03-282019-09-282019-06-292019-03-302018-09-292018-06-302018-03-312017-09-302017-06-242017-03-252016-09-242016-06-252016-03-262015-09-262015-06-272015-03-282014-09-272014-06-282014-03-292013-09-282013-06-292013-03-302012-09-292012-06-302012-03-312011-09-242011-06-252011-03-262010-09-252010-06-26
Value48434141414141402828282827262626262626252525252424242424242424242323
Percentage of WeightedAverageNumberOfSharesOutstandingBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Allocated Share Based Compensation Expense

us-gaap:AllocatedShareBasedCompensationExpense

us-gaap:AllocatedShareBasedCompensationExpense


Allocated
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-312016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282012-09-292012-06-302011-09-242011-06-25
Value3.5063.5233.9213.2993.4033.6113.2873.5063.6623.6934.5561.881.9481.6691.6711.861.7591.7171.8671.6681.6511.9571.6741.6371.7461.6981.7551.5851.6130.9591.2510.9230.938
Percentage of AllocatedShareBasedCompensationExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax1.41.61.92.22.42.62.32.42.42.52.72.22.01.82.02.01.92.12.62.42.23.02.62.42.32.51.81.72.11.72.11.31.2

us-gaap:AllocatedShareBasedCompensationExpense us-gaap:IncomeStatementLocation

us-gaap:CostOfSales


Allocated
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-312016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-28
Value0.1910.2620.2520.2180.2110.2120.1910.2120.2080.1250.1380.1250.1620.1210.0960.1230.1210.0830.1340.160.170.0930.1530.10.1980.1150.1410.0850.19
Percentage of AllocatedShareBasedCompensationExpense5.47.46.46.66.25.95.86.05.73.43.06.68.37.25.76.66.94.87.29.610.34.89.16.111.36.88.05.411.8
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.10.10.10.10.10.20.10.10.10.10.10.10.20.10.10.10.10.10.20.20.20.10.20.10.30.20.10.10.2
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:CostOfSales0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:ResearchAndDevelopmentExpense


Allocated
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-312016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-28
Value0.7630.7810.8020.7820.8280.8330.760.820.7760.6380.6190.3540.3950.3490.1980.2780.2620.3160.2940.2880.2940.4160.2510.2560.2540.3310.4940.4530.422
Percentage of AllocatedShareBasedCompensationExpense21.822.220.523.724.323.123.123.421.217.313.618.820.320.911.814.914.918.415.717.317.821.315.015.614.519.528.128.626.2
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.30.30.40.50.60.60.50.60.50.40.40.40.40.40.20.30.30.40.40.40.40.60.40.40.30.50.50.50.5
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:ResearchAndDevelopmentExpense0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:SellingGeneralAndAdministrativeExpenses


Allocated
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-312016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-28
Value2.5522.482.8672.2992.3642.5662.3362.4742.6782.933.7991.4011.3911.1991.3771.4591.3761.3181.4391.221.1871.6071.271.2811.2941.2521.121.0471.001
Percentage of AllocatedShareBasedCompensationExpense72.870.473.169.769.571.171.170.673.179.383.474.571.471.882.478.478.276.877.173.171.982.175.978.374.173.763.866.162.1
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax1.01.11.41.51.61.81.61.71.82.02.21.61.41.31.61.61.51.62.01.81.62.42.01.91.71.81.21.11.3
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:SellingGeneralAndAdministrativeExpenses0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Comprehensive Income Net Of Tax

us-gaap:ComprehensiveIncomeNetOfTax

us-gaap:ComprehensiveIncomeNetOfTax


Comprehensive
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-312016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282013-06-292013-03-302012-12-292012-09-292012-06-302012-03-312011-12-312011-09-242011-06-252011-03-26
Value9517315.046-2.843-18.205-11.032-23.709-15.678-27.427-61.4314.3134.956117.124111310-6.7240.8252.2510.5770.678-3.0092.661-11.138-8.187-1.113.659-3.018-3.443-6.17-2.888-16.049-3.2070.429-7.073-0.597-1.825-1.4455.71213
Percentage of ComprehensiveIncomeNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax39.17.615.83.3-2.0-13.1-7.8-16.5-10.5-18.6-36.05.05.012.58.512.114.613.2-9.51.22.90.91.1-4.53.5-16.4-8.5-1.24.7-4.4-5.3-10.3-4.3-28.7-6.30.7-11.9-1.1-2.7-2.07.115.0

Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest

us-gaap:ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest

us-gaap:ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest


Comprehensive
Period End2020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-31
Value315.046-2.843-18.205-11.086-23.567-15.714-27.475-61.6794.3134.95611
Percentage of ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax15.83.3-2.0-13.1-7.8-16.4-10.5-18.6-36.15.05.012.5

Cost Depreciation Amortization And Depletion

us-gaap:CostDepreciationAmortizationAndDepletion

us-gaap:CostDepreciationAmortizationAndDepletion


Cost
Period End2021-06-262021-03-272020-09-262020-06-272020-03-282019-09-282019-06-292019-03-30
Value7.0437.1017.4470.0072567.2667.5970.0076257.641
Percentage of CostDepreciationAmortizationAndDepletion100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax2.93.14.90.05.25.30.05.2

Cost Of Goods And Service Excluding Depreciation Depletion And Amortization

us-gaap:CostOfGoodsAndServiceExcludingDepreciationDepletionAndAmortization

us-gaap:CostOfGoodsAndServiceExcludingDepreciationDepletionAndAmortization


Cost
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-30
Value14012311187838287848793
Percentage of CostOfGoodsAndServiceExcludingDepreciationDepletionAndAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax57.254.754.957.857.759.661.958.958.463.2

Cost Of Goods And Services Sold

us-gaap:CostOfGoodsAndServicesSold

us-gaap:CostOfGoodsAndServicesSold


Cost
Period End2020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-07-012017-06-242017-04-012017-03-252016-12-312016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282013-06-292013-03-302012-12-292012-09-292012-06-302012-03-312011-12-312011-09-242011-06-252011-03-262010-12-252010-09-252010-06-26
Value11187838287848793128515855485656564848454649464344494664615244454542403439413745485460645547
Percentage of CostOfGoodsAndServicesSold100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax54.957.857.759.661.958.958.463.275.460.158.458.458.359.959.860.459.360.264.066.565.170.467.966.265.868.067.464.967.365.270.775.864.172.267.268.670.370.867.867.567.267.966.565.163.4

Costs And Expenses

us-gaap:CostsAndExpenses

us-gaap:CostsAndExpenses


Costs
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-312016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282013-06-292013-03-302012-12-292012-09-292012-06-302012-03-312011-12-312011-09-242011-06-252011-03-262010-12-252010-09-252010-06-26
Value13018918315214415215514916416523179868579838273676872676165716994857671717167685660615765697582867765
Percentage of CostsAndExpenses100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax53.284.290.7100.9100.4109.8109.6104.2109.8112.2135.492.186.289.594.588.987.690.195.798.695.6102.696.596.694.5102.597.890.098.7105.0110.0119.9100.7123.1111.2104.5103.5107.098.296.392.891.589.289.888.1

Gains Losses On Extinguishment Of Debt

us-gaap:GainsLossesOnExtinguishmentOfDebt

us-gaap:GainsLossesOnExtinguishmentOfDebt


Gains
Period End2021-06-262021-03-272020-12-262020-09-26
Value0-1761000.0-25000.0293000.0
Percentage of GainsLossesOnExtinguishmentOfDebt0.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.0-0.8-0.00.2

us-gaap:GainsLossesOnExtinguishmentOfDebt us-gaap:DebtInstrument

cohu:SecuredTermLoanFacility


Gains
Period End2021-06-262021-03-272020-08-31
Value0-1800000.0300000.0
Percentage of GainsLossesOnExtinguishmentOfDebt0.0102.20.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.0-0.80.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax cohu:SecuredTermLoanFacility0.00.00.0

General And Administrative Expense

us-gaap:GeneralAndAdministrativeExpense us-gaap:ConsolidationItems

us-gaap:GeneralAndAdministrativeExpense

us-gaap:CorporateNonSegment


General
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-31
Value3.3663.588-0.3750.460.8483.4512.4832.0761.5483.741143.1625.1992.122
Percentage of GeneralAndAdministrativeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax1.41.6-0.20.30.62.51.71.41.02.58.83.75.22.2
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:CorporateNonSegment0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Income Loss From Continuing Operations

us-gaap:IncomeLossFromContinuingOperations

us-gaap:IncomeLossFromContinuingOperations


Income
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-07-012017-06-242017-04-012017-03-252016-12-312016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282013-06-292013-03-30
Value952714-6.646-4.74-17.318-16.281-10.48-19.383-22.851-57.1164.803118.1226.8958.75510106.7636.7632.3060.2182.662-1.9112.291.3353.887-2.741.3376.9210.931-3.354-6.578-11.113-4.334-12.235
Percentage of IncomeLossFromContinuingOperations100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax38.812.27.3-4.4-3.3-12.5-11.5-7.3-12.9-15.5-33.55.611.78.58.29.311.411.48.38.33.30.33.5-2.93.62.05.2-4.01.47.31.2-4.9-10.2-18.5-6.5-21.8

Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments


Income
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-312016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282013-06-292013-03-302012-12-292012-09-292012-06-302012-03-312011-12-312011-09-242011-06-252011-03-262010-12-252010-09-252010-06-26
Value1123115-5.53-4.603-18.31-19.524-9.203-20.299-23.051-63.3827.10514104.86610118.1213.2061.0673.423-1.6892.252.2754.164-1.6992.0749.4141.05-3.403-6.454-11.944-4.88-12.919-5.658-1.868-1.976-3.6151.3072.7745.9457.752108.9089.065
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax46.113.87.5-3.7-3.2-13.2-13.7-6.4-13.5-15.6-37.18.214.110.85.811.312.610.04.51.54.5-2.63.53.45.5-2.52.210.01.3-5.0-10.0-19.9-7.3-23.1-11.2-3.2-3.3-6.82.03.97.38.611.010.412.1

Income Tax Expense Benefit

us-gaap:IncomeTaxExpenseBenefit

us-gaap:IncomeTaxExpenseBenefit


Income
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-312016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282013-06-292013-03-302012-12-292012-09-292012-06-302012-03-312011-12-312011-09-242011-06-252011-03-262010-12-252010-09-252010-06-26
Value173.5750.4051.1160.137-0.992-3.2431.277-0.916-0.2-6.2662.3022.4682.127-2.0291.8371.0781.3580.9150.8490.7610.222-0.040.940.2771.0410.7372.4930.119-0.056-0.004-1.124-0.546-0.816-0.497-0.1190.133-0.3910.588-0.6020.8951.1781.1921.2972.367
Percentage of IncomeTaxExpenseBenefit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax7.21.60.20.70.1-0.7-2.30.9-0.6-0.1-3.72.72.52.2-2.42.01.11.71.31.21.00.3-0.11.40.41.50.82.60.2-0.1-0.0-1.9-0.8-1.5-1.0-0.20.2-0.70.9-0.81.11.31.21.53.2

Income Taxes Paid Net

us-gaap:IncomeTaxesPaidNet

us-gaap:IncomeTaxesPaidNet


Income
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-312016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282013-06-292013-03-302012-12-292012-09-292011-12-312011-09-242010-12-252010-09-25
Value3.4680.2790.653.0191.4130.691.6672.5856.8933.7972.6940.9410.112.4983.354-0.0211.4492.3120.8310.8164.9130.2480.1610.120.169-0.703-0.0050.3850.2810.310.2350.1860.137-1.458-0.1220.5990.631.3511.1830.893
Percentage of IncomeTaxesPaidNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax1.40.10.32.01.00.51.21.84.62.61.61.10.12.64.0-0.01.52.91.21.26.40.40.30.20.2-1.0-0.00.40.40.50.40.30.2-2.6-0.21.00.91.91.21.0

Interest Expense

us-gaap:InterestExpense

us-gaap:InterestExpense


Interest
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-31
Value1.8312.5752.8553.0213.4564.4274.7675.05.2825.5074.9440.0110.0110.011
Percentage of InterestExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.71.11.42.02.43.23.43.53.53.72.90.00.00.0

Interest Paid Net

us-gaap:InterestPaidNet

us-gaap:InterestPaidNet


Interest
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-30
Value1.6482.5322.7092.7733.5347.3080.0264.7324.9585.13
Percentage of InterestPaidNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.71.11.31.82.55.30.03.33.33.5

Net Income Loss

us-gaap:NetIncomeLoss

us-gaap:NetIncomeLoss


Net
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-07-012017-06-242017-04-012017-03-252016-12-312016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282013-06-292013-03-302012-12-292012-09-292012-06-302012-03-312011-12-312011-09-242011-06-252011-03-262010-12-252010-09-252010-06-26
Value952714-6.646-4.74-17.276-17.266-10.468-19.323-22.643-56.7544.803118.1226.8958.75510106.7636.7632.0890.2692.607-1.9111.9491.113-0.072-2.740.3747.5194.163-3.347-6.45-10.82-4.045-12.103-5.161-1.749-2.109-3.2240.7193.3765.056.5749.4287.6116.698
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax38.812.27.3-4.4-3.3-12.4-12.2-7.3-12.9-15.3-33.35.611.78.58.29.311.111.18.38.33.00.43.4-2.93.11.6-0.1-4.00.48.05.3-4.9-10.0-18.0-6.1-21.6-10.2-3.0-3.6-6.01.14.76.27.39.78.88.9

us-gaap:NetIncomeLoss us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings


Net
Period End2021-06-262021-03-272020-06-272020-03-28
Value9527-4.74-17.276
Percentage of NetIncomeLoss100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax38.812.2-3.3-12.4
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:RetainedEarnings0.00.00.00.0

Operating Income Loss

us-gaap:OperatingIncomeLoss

us-gaap:OperatingIncomeLoss


Operating
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-312016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282013-06-292013-03-302012-12-292012-09-292012-06-302012-03-312011-12-312011-09-242011-06-252011-03-262010-12-252010-09-252010-06-26
Value1143518-1.36-0.528-13.626-13.659-6.023-14.662-17.984-60.3716.77913104.66610118.023.0370.9963.364-1.7322.2252.2664.16-1.7052.0699.4081.045-3.418-6.466-11.96-4.896-12.929-5.705-2.607-2.065-3.7071.2052.665.8297.642108.7818.927
Percentage of OperatingIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax46.815.89.3-0.9-0.4-9.8-9.6-4.2-9.8-12.2-35.47.913.810.55.511.112.49.94.31.44.4-2.63.53.45.5-2.52.210.01.3-5.0-10.0-19.9-7.3-23.1-11.2-4.5-3.5-7.01.83.77.28.510.810.211.9

Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax

us-gaap:OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax

us-gaap:OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax


Other
Period End2020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-312016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282013-06-292013-03-302012-12-292012-09-292012-06-302012-03-312011-12-312011-09-24
Value14111.897-0.9297.328-13.2763.684-5.262-5.47-0.475-6.8143.8541.372.573.3594.046-8.5130.561-0.3422.505-1.246-4.2212.81-8.343-5.475-8.537-0.380.2851.5074.6351.13-4.0021.9692.132-4.9952.583-3.718-4.854
Percentage of OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax7.27.81.3-0.75.2-9.32.5-3.6-3.2-0.6-6.84.11.62.73.65.0-12.00.8-0.43.8-2.0-6.33.7-12.3-5.7-9.0-0.50.42.37.71.7-7.13.93.7-8.44.8-5.6-6.8

Other Comprehensive Income Loss Net Of Tax

us-gaap:OtherComprehensiveIncomeLossNetOfTax

us-gaap:OtherComprehensiveIncomeLossNetOfTax


Other
Period End2020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-31
Value17111.897-0.9296.234-13.2413.645-4.788-4.682-0.49-6.6923.771
Percentage of OtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax8.47.81.3-0.74.4-9.22.4-3.2-2.7-0.6-6.74.0

Profit Loss

us-gaap:ProfitLoss

us-gaap:ProfitLoss


Profit
Period End2020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-07-012017-04-01
Value14-6.646-4.74-17.276-17.32-10.326-19.359-22.687-56.9974.803118.1226.8958.755106.763
Percentage of ProfitLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax7.3-4.4-3.3-12.4-12.2-7.2-12.9-15.3-33.45.611.78.58.29.311.18.3

Research And Development Expense

us-gaap:ResearchAndDevelopmentExpense

us-gaap:ResearchAndDevelopmentExpense


Research
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-312016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282013-06-292013-03-302012-12-292012-09-292012-06-302012-03-312011-12-312011-09-242011-06-252011-03-262010-12-252010-09-252010-06-26
Value2323222020222020222222111111119.6099.4669.776108.6348.3057.8038.2068.6057.7319.629109.6791011111111139.9779.1368.6888.379.0398.8249.2849.0839.7418.7999.012
Percentage of ResearchAndDevelopmentExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax9.610.311.213.614.216.214.714.314.715.413.212.911.112.414.110.310.112.114.312.510.911.912.912.710.314.110.610.213.116.318.219.416.824.019.715.814.615.713.612.311.510.110.110.212.0

Revenue From Contract With Customer Including Assessed Tax

us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax

us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax


Revenue
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-07-012017-06-242017-04-012017-03-252016-12-312016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282013-06-292013-03-302012-12-292012-09-292012-06-302012-03-312011-12-312011-09-242011-06-252011-03-262010-12-252010-09-252010-06-26
Value244225202150144138142143150147170869995849393938181706976656367756896947768645966565057595366718089968674
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:ProductOrService, us-gaap:StatementBusinessSegments

cohu:Nonsystems, cohu:PCBTest


Revenue
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-30
Value4.4674.4624.4274.4324.5474.0684.5293.8254.0254.144
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax1.82.02.22.93.22.93.22.72.72.8
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax1.82.02.22.93.22.93.22.72.72.8
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax cohu:Nonsystems cohu:PCBTest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

cohu:Nonsystems, cohu:SemiconductorTestAndInspection


Revenue
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-31
Value8174856657576162615665434440
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax33.332.942.344.439.841.443.043.340.938.438.450.944.242.3
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax33.332.942.344.439.841.443.043.340.938.438.450.944.242.3
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax cohu:Nonsystems cohu:SemiconductorTestAndInspection100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

cohu:Systems, cohu:PCBTest


Revenue
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-30
Value9.2118.629.3548.998.1096.843.6966.8538.4076.972
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax3.83.84.66.05.64.92.64.85.64.7
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax3.83.84.66.05.64.92.64.85.64.7
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax cohu:Systems cohu:PCBTest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

cohu:Systems, cohu:SemiconductorTestAndInspection


Revenue
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-31
Value1491381027074707270767996425554
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax61.161.350.946.751.450.851.249.250.854.156.749.155.857.7
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax61.161.350.946.751.450.851.249.250.854.156.749.155.857.7
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax cohu:Systems cohu:SemiconductorTestAndInspection100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:StatementBusinessSegments

cohu:PCBTest


Revenue
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-30
Value1313131312108.225101211
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax5.65.86.88.98.87.95.87.48.37.5
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax5.65.86.88.98.87.95.87.48.37.5
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax cohu:PCBTest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

cohu:SemiconductorTestAndInspection


Revenue
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-31
Value231212188137131128133132137136162869995
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax94.494.293.291.191.292.194.292.691.792.595.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax94.494.293.291.191.292.194.292.691.792.595.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax cohu:SemiconductorTestAndInspection100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:StatementGeographical

cohu:Malaysia1


Revenue
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-31
Value1923191111151412161723131311
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax7.810.39.67.68.210.99.99.111.312.013.615.913.112.4
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax7.810.39.67.68.210.99.99.111.312.013.615.913.112.4
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax cohu:Malaysia1100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

cohu:RestOfTheWorld


Revenue
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-31
Value8261494244494644525985264238
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax33.927.524.328.031.136.033.031.234.840.550.330.342.140.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax33.927.524.328.031.136.033.031.234.840.550.330.342.140.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax cohu:RestOfTheWorld100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

country:CN


Revenue
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-31
Value5754503031303031322327231920
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax23.424.125.220.221.622.221.721.721.815.916.027.419.221.3
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax23.424.125.220.221.622.221.721.721.815.916.027.419.221.3
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax country:CN100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

country:PH


Revenue
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-31
Value3633211113101312111414119.91610
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax14.915.010.47.99.27.29.48.67.69.88.712.99.911.1
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax14.915.010.47.99.27.29.48.67.69.88.712.99.911.1
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax country:PH100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

country:TW


Revenue
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-31
Value27322422221323201714135.9162.9052.941
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax11.114.312.215.115.610.016.314.211.510.17.86.92.93.1
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax11.114.312.215.115.610.016.314.211.510.17.86.92.93.1
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax country:TW100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

country:US


Revenue
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-31
Value2120363220191321191719111514
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax8.98.918.321.314.313.79.515.312.911.611.413.415.715.2
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax8.98.918.321.314.313.79.515.312.911.611.413.415.715.2
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax country:US100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Selling General And Administrative Expense

us-gaap:SellingGeneralAndAdministrativeExpense

us-gaap:SellingGeneralAndAdministrativeExpense


Selling
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-312016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282013-06-292013-03-302012-12-292012-09-292012-06-302012-03-312011-12-312011-09-242011-06-252011-03-262010-12-252010-09-252010-06-26
Value32323331303334333638451616171716161412131513131113131414141613141315121111101111111212129.489
Percentage of SellingGeneralAndAdministrativeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax13.414.516.620.821.524.024.323.524.325.926.919.216.718.721.318.017.117.817.519.619.720.320.717.718.420.314.714.918.323.521.124.819.826.924.420.118.620.416.816.514.113.512.614.512.7

Assets

us-gaap:Assets

us-gaap:Assets


Assets
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-312016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282013-06-292013-03-302012-12-292012-09-292012-06-302012-03-312011-12-312011-09-242011-06-252010-12-25
Value13711258109010461066107210771071110311061134443435422420404401378345347347352345332336335348365356342345341348346334348347356361371371366
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Assets us-gaap:ConsolidationItems

us-gaap:CorporateNonSegment


Assetsus-gaap:
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292017-12-302016-12-31
Value1911795543554618151522345254
Percentage of Assets14.014.35.14.25.24.41.71.51.42.03.012.415.6
Percentage of Assets14.014.35.14.25.24.41.71.51.42.03.012.415.6
Percentage of Assets us-gaap:CorporateNonSegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Assets us-gaap:StatementBusinessSegments

cohu:PCBTest


Assetsus-gaap:
Period End2021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-29
Value66666161585657626057
Percentage of Assets5.36.15.95.85.55.35.45.65.55.1
Percentage of Assets5.36.15.95.85.55.35.45.65.55.1
Percentage of Assets cohu:PCBTest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

cohu:SemiconductorTestAndInspection


Assetsus-gaap:
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292017-12-302016-12-31
Value11801012968941948966998994102110181038368291
Percentage of Assets86.080.488.889.988.990.292.792.892.692.191.587.684.4
Percentage of Assets86.080.488.889.988.990.292.792.892.692.191.587.684.4
Percentage of Assets cohu:SemiconductorTestAndInspection100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

cohu:SemiconductorTestAndInspectionAndPCBTest


Assetsus-gaap:
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292017-12-302016-12-31
Value11801079103410021010102510551051108310791095368291
Percentage of Assets86.085.794.995.894.895.698.098.298.297.696.687.684.4
Percentage of Assets86.085.794.995.894.895.698.098.298.297.696.687.684.4
Percentage of Assets cohu:SemiconductorTestAndInspectionAndPCBTest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Liabilities And Stockholders Equity

us-gaap:LiabilitiesAndStockholdersEquity

us-gaap:LiabilitiesAndStockholdersEquity


Liabilities
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-312016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282013-06-292013-03-302012-12-292012-09-292012-06-302012-03-312011-12-312011-09-242011-06-252010-12-25
Value13711258109010461066107210771071110311061134443435422420404401378345347347352345332336335348365356342345341348346334348347356361371371366
Percentage of LiabilitiesAndStockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Stockholders Equity

us-gaap:StockholdersEquity

us-gaap:StockholdersEquity


Stockholders
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-312016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282013-06-292013-03-302012-12-292012-09-292012-06-302012-03-312011-12-312011-09-242011-06-252010-12-252009-12-262008-12-27
Value850749512474466464483491514528546309304298289278264245235240239236238236239234247254254249253256262264280283283290291292294274257285
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets62.059.547.045.443.843.444.845.946.747.848.269.869.970.668.868.965.964.868.269.369.067.269.071.171.070.070.869.671.472.973.375.175.476.283.981.481.581.580.578.979.275.10.00.0

us-gaap:StockholdersEquity us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome


Stockholders
Period End2021-06-262021-03-272020-12-262020-06-272020-03-282019-12-282017-12-302016-12-312015-12-262014-12-272013-12-282012-12-292011-12-312010-12-252009-12-262008-12-27
Value-14.24-14.758-4.326-33.062-34.959-34.03-17.787-27.882-21.772-10.7146.6511.783-0.012-0.1978.6627.134
Percentage of StockholdersEquity-1.7-2.0-0.8-7.1-7.5-7.0-6.2-11.8-9.1-4.32.60.6-0.0-0.13.42.5
Percentage of Assets-1.0-1.2-0.4-3.1-3.3-3.2-4.2-8.1-6.3-3.11.90.5-0.0-0.10.00.0
Percentage of Assets us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AdditionalPaidInCapital


Stockholders
Period End2021-06-262021-03-272020-12-262020-06-272020-03-282019-12-282017-12-302016-12-312015-12-262014-12-272013-12-282012-12-292011-12-312010-12-252009-12-262008-12-27
Value66666144843943543312711110597898377716461
Percentage of StockholdersEquity78.488.387.594.393.789.744.247.544.339.635.529.726.726.125.221.4
Percentage of Assets48.652.641.141.240.640.230.432.430.628.126.024.921.519.60.00.0
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CommonStock


Stockholders
Period End2021-06-262021-03-272020-12-262020-06-272020-03-282019-12-282017-12-302016-12-312015-12-262014-12-272013-12-282012-12-292011-12-312010-12-252009-12-262008-12-27
Value48484241414128262625252424232323
Percentage of StockholdersEquity5.76.58.29.09.08.69.911.411.010.49.98.88.48.79.28.2
Percentage of Assets3.53.83.93.93.93.86.87.87.67.47.37.46.76.60.00.0
Percentage of Assets us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings


Stockholders
Period End2021-06-262021-03-272020-12-262020-06-272020-03-282019-12-282017-12-302016-12-312015-12-262014-12-272013-12-282012-12-292011-12-312010-12-252009-12-262008-12-27
Value1485326182242150124128134131170189179160193
Percentage of StockholdersEquity17.57.25.13.94.98.852.152.953.854.352.060.965.065.262.367.9
Percentage of Assets10.94.32.41.72.13.935.836.137.138.538.151.052.348.90.00.0
Percentage of Assets us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Assets Current

us-gaap:AssetsCurrent

us-gaap:AssetsCurrent


Assets
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-312016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282013-06-292013-03-302012-12-292012-09-292012-06-302012-03-312011-12-312011-09-242011-06-252010-12-25
Value826675485444456453439431442444485322316297297279276253245240239243234206208207214221203186186183195193221234234237243248244240
Percentage of AssetsCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets60.353.744.542.542.842.340.840.340.140.242.872.772.670.470.769.168.967.071.069.368.968.967.962.262.062.061.660.757.254.454.153.956.055.766.067.267.566.767.467.065.765.6

Cash And Cash Equivalents At Carrying Value

us-gaap:CashAndCashEquivalentsAtCarryingValue

us-gaap:CashAndCashEquivalentsAtCarryingValue


Cash
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-312016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282013-06-292013-03-302012-12-292012-09-292012-06-302012-03-312011-12-312011-09-242011-06-252011-03-262010-12-252010-09-252010-06-262009-12-262008-12-27
Value3531431491691621711551451431591641701271151341219283961091081041158972687060574051464741102755950535149484532413830
Percentage of CashAndCashEquivalentsAtCarryingValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets25.811.413.716.215.316.014.413.513.014.414.538.529.127.231.930.223.022.127.831.431.329.733.426.821.620.520.316.616.311.715.013.613.611.930.721.717.014.214.713.813.30.012.50.00.00.00.0

Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents


Cash
Period End2020-09-262020-06-272019-09-282019-06-29
Value169162145143
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents100.0100.0100.0100.0
Percentage of Assets16.215.313.513.0

Inventory Net

us-gaap:InventoryNet

us-gaap:InventoryNet


Inventory
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-312016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282013-06-292013-03-302012-12-292012-09-292012-06-302012-03-312011-12-312011-09-242011-06-252010-12-25
Value15516014213714113413013313713013963636262566054454850545150535855606162586067736268728282847663
Percentage of InventoryNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets11.412.813.113.213.312.612.112.512.411.812.314.414.514.814.813.915.014.413.213.914.615.514.915.315.817.415.916.517.318.317.117.719.421.118.619.721.023.122.922.720.617.3

Other Assets Current

us-gaap:OtherAssetsCurrent

us-gaap:OtherAssetsCurrent


Other
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-312016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-27
Value1.0463.241.8271.2730.9535.9983.1582.6691.1440.2581.6828.643109.9248.6138.28811108.5937.1728.1378.6576.2615.6678.0918.7919.18
Percentage of OtherAssetsCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.10.30.20.10.10.60.30.20.10.00.12.02.52.32.02.02.82.92.52.12.32.51.81.72.42.62.6

Property Plant And Equipment Gross

us-gaap:PropertyPlantAndEquipmentGross

us-gaap:PropertyPlantAndEquipmentGross


Property
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-312016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282013-06-292013-03-302012-12-292012-09-292012-06-302012-03-312011-12-312011-09-242011-06-252010-12-25
Value10811211411311010811411511611311368686867666462474746454573748385868689898785848382828281828484
Percentage of PropertyPlantAndEquipmentGross100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets7.99.010.510.810.410.110.610.810.610.210.015.515.616.216.016.516.016.513.713.613.412.913.222.122.325.024.423.624.426.125.825.624.624.424.923.723.723.222.522.222.823.2

us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType

us-gaap:BuildingAndBuildingImprovements


Property
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302016-12-312015-12-262014-12-27
Value3940414142404140393637141414137.9678.97131
Percentage of PropertyPlantAndEquipmentGross36.535.735.936.838.337.536.334.833.631.932.720.420.820.820.516.919.736.4
Percentage of Assets2.93.23.84.04.03.83.83.83.63.33.33.23.33.43.32.32.68.9
Percentage of Assets us-gaap:BuildingAndBuildingImprovements0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:LandAndLandImprovements


Property
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302016-12-312015-12-262014-12-27
Value8.3937.9348.1417.8818.7248.6511111212117.8557.9718.3318.0174.0794.60711
Percentage of PropertyPlantAndEquipmentGross7.87.07.17.07.98.010.210.310.410.810.411.411.712.111.98.610.113.8
Percentage of Assets0.60.60.70.80.80.81.11.11.11.11.01.81.82.01.91.21.33.4
Percentage of Assets us-gaap:LandAndLandImprovements0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:MachineryAndEquipment


Property
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302016-12-312015-12-262014-12-27
Value606465635959616365646446454645353132
Percentage of PropertyPlantAndEquipmentGross55.857.357.056.253.854.553.454.956.057.256.968.267.567.167.574.570.138.0
Percentage of Assets4.45.16.06.15.65.55.75.95.95.85.710.610.610.910.810.29.29.3
Percentage of Assets us-gaap:MachineryAndEquipment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Accumulated Depreciation Depletion And Amortization Property Plant And Equipment

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment


Accumulated
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-312016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282013-06-292013-03-302012-12-292012-09-292012-06-302012-03-312011-12-312011-09-242011-06-252010-12-25
Value434747484443434545413935343332323130282827262641435353525253525150484747464544444545
Percentage of AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets3.23.74.44.64.24.14.04.24.13.73.58.17.97.97.88.07.88.08.48.28.07.67.712.413.115.815.314.514.815.715.315.114.414.114.313.513.412.812.211.912.312.3

Amortization Of Intangible Assets

us-gaap:AmortizationOfIntangibleAssets

us-gaap:AmortizationOfIntangibleAssets


Amortization
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-07-012017-06-242017-04-012017-03-252016-12-312016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282013-06-292013-03-302012-12-292012-09-292012-06-302012-03-302011-12-312011-09-24
Value9.0459.2449.8989.7839.5279.5389.6159.9699.98710111.01.01.10.70.70.61.00.71.11.51.81.81.81.71.71.71.81.892.02.12.12.0822.61.71.71.0571.01.01.01.0451.1
Percentage of AmortizationOfIntangibleAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Property Plant And Equipment Net

us-gaap:PropertyPlantAndEquipmentNet

us-gaap:PropertyPlantAndEquipmentNet


Property
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-312016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282013-06-292013-03-302012-12-292012-09-292012-06-302012-03-312011-12-312011-09-242011-06-252010-12-25
Value656566646564707071717432333534343232181818181931303031333435363535353535353736383939
Percentage of PropertyPlantAndEquipmentNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets4.75.26.16.26.26.06.66.66.56.56.67.47.78.38.18.58.28.55.35.45.45.35.59.69.29.29.19.19.610.410.510.510.210.310.610.210.210.410.210.310.510.9

us-gaap:PropertyPlantAndEquipmentNet us-gaap:StatementGeographical

cohu:Malaysia1


Property
Period End2020-12-262019-12-282018-12-292017-12-30
Value3.9867.151104.622
Percentage of PropertyPlantAndEquipmentNet6.010.114.213.5
Percentage of Assets0.40.70.91.1
Percentage of Assets cohu:Malaysia10.00.00.00.0

cohu:RestOfTheWorld


Property
Period End2020-12-262019-12-282018-12-292017-12-302016-12-312015-12-262014-12-27
Value2.7493.2553.9781.0560.9280.7280.825
Percentage of PropertyPlantAndEquipmentNet4.14.65.43.15.13.82.6
Percentage of Assets0.30.30.40.30.30.20.2
Percentage of Assets cohu:RestOfTheWorld0.00.00.00.00.00.00.0

country:DE


Property
Period End2020-12-262019-12-282018-12-292017-12-302016-12-312015-12-262014-12-272013-12-282012-12-29
Value1925217.4856.6746.8827.4848.9738.802
Percentage of PropertyPlantAndEquipmentNet29.635.629.121.936.636.223.524.824.8
Percentage of Assets1.82.31.91.81.92.02.12.62.6
Percentage of Assets country:DE0.00.00.00.00.00.00.00.00.0

country:JP


Property
Period End2020-12-262019-12-282018-12-292017-12-30
Value139.9641112
Percentage of PropertyPlantAndEquipmentNet19.814.116.035.5
Percentage of Assets1.20.91.02.9
Percentage of Assets country:JP0.00.00.00.0

country:PH


Property
Period End2020-12-262019-12-282018-12-292017-12-302016-12-312015-12-262014-12-272013-12-282012-12-29
Value9.3338.6375.8425.8084.1674.1712.7213.2783.851
Percentage of PropertyPlantAndEquipmentNet13.912.27.917.022.922.08.59.010.9
Percentage of Assets0.90.80.51.41.21.20.80.91.1
Percentage of Assets country:PH0.00.00.00.00.00.00.00.00.0

country:US


Property
Period End2020-12-262019-12-282018-12-292017-12-302016-12-312015-12-262014-12-272013-12-282012-12-29
Value1716203.0642.3983.054182122
Percentage of PropertyPlantAndEquipmentNet26.623.527.59.013.216.159.660.463.8
Percentage of Assets1.61.51.80.70.70.95.46.36.8
Percentage of Assets country:US0.00.00.00.00.00.00.00.00.0

Goodwill

us-gaap:Goodwill

us-gaap:Goodwill


Goodwill
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-312016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282013-06-292013-03-302012-12-292012-09-292012-06-302012-03-312011-12-312011-09-242011-06-252010-12-25
Value22624625224423823723823524123924264646665656663586160606060616063677171717076765857575958596158
Percentage of Goodwill100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets16.519.623.123.422.422.222.122.021.921.621.414.614.915.815.616.216.516.617.017.617.517.217.518.318.218.018.118.620.020.920.620.822.122.017.516.616.416.616.116.016.516.0

us-gaap:Goodwill us-gaap:ReportingUnit

cohu:PCBTest


Goodwillus-gaap:
Period End2021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282018-12-29
Value21212019191921
Percentage of Goodwill8.68.68.48.38.38.38.8
Percentage of Assets1.72.02.01.91.81.81.9
Percentage of Assets cohu:PCBTest0.00.00.00.00.00.00.0

cohu:SemiconductorTestAndInspection


Goodwillus-gaap:
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282018-12-292017-12-302016-12-31
Value2262252302232192182182206558
Percentage of Goodwill100.091.491.491.691.791.791.791.2100.0100.0
Percentage of Assets16.517.921.221.420.520.420.319.515.617.0
Percentage of Assets cohu:SemiconductorTestAndInspection0.00.00.00.00.00.00.00.00.00.0

Indefinite Lived Intangible Assets Excluding Goodwill

us-gaap:IndefiniteLivedIntangibleAssetsExcludingGoodwill us-gaap:IndefiniteLivedIntangibleAssetsByMajorClass

us-gaap:IndefiniteLivedIntangibleAssetsExcludingGoodwill

cohu:InProcessTechnology


Indefinite
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282018-12-29
Value1.94.17.88.316162036
Percentage of IndefiniteLivedIntangibleAssetsExcludingGoodwill100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.10.30.70.81.61.61.93.2
Percentage of Assets cohu:InProcessTechnology0.00.00.00.00.00.00.00.0

Intangible Assets Net Excluding Goodwill

us-gaap:IntangibleAssetsNetExcludingGoodwill

us-gaap:IntangibleAssetsNetExcludingGoodwill


Intangible
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-312016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282013-06-292013-03-302012-12-292012-09-292012-06-302012-03-312011-12-312011-09-242011-06-252010-12-25
Value20322123323825226127528229730531813141616171822172022232527303133364143454639411819192121232626
Percentage of IntangibleAssetsNetExcludingGoodwill100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets14.817.621.422.823.624.425.526.426.927.628.13.13.33.84.04.44.75.85.25.96.46.77.38.29.09.39.510.011.512.713.113.711.411.95.75.65.56.06.06.47.07.2

Intangible Assets Net Including Goodwill

us-gaap:IntangibleAssetsNetIncludingGoodwill

us-gaap:IntangibleAssetsNetIncludingGoodwill


Intangible
Period End2020-12-262019-12-282018-12-292017-12-302016-12-312015-12-262014-12-272013-12-282012-12-292011-12-31
Value485513561827685961167779
Percentage of IntangibleAssetsNetIncludingGoodwill100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets44.647.749.519.622.224.827.633.823.222.1

us-gaap:IntangibleAssetsNetIncludingGoodwill us-gaap:StatementGeographical

cohu:Malaysia1


Intangible
Period End2020-12-262019-12-282018-12-292017-12-30
Value4544437.078
Percentage of IntangibleAssetsNetIncludingGoodwill9.38.67.88.6
Percentage of Assets4.24.13.81.7
Percentage of Assets cohu:Malaysia10.00.00.00.0

cohu:RestOfTheWorld


Intangible
Period End2020-12-262019-12-282018-12-292017-12-302016-12-312015-12-262014-12-27
Value7.8667.4538.9770.9960.9530.9860.984
Percentage of IntangibleAssetsNetIncludingGoodwill1.61.51.61.21.21.21.0
Percentage of Assets0.70.70.80.20.30.30.3
Percentage of Assets cohu:RestOfTheWorld0.00.00.00.00.00.00.0

country:CH


Intangible
Period End2020-12-262019-12-282018-12-292017-12-302016-12-312015-12-262014-12-272013-12-28
Value5.0068.19111518222532
Percentage of IntangibleAssetsNetIncludingGoodwill1.01.62.118.823.826.226.927.9
Percentage of Assets0.50.81.03.75.36.57.49.4
Percentage of Assets country:CH0.00.00.00.00.00.00.00.0

country:DE


Intangible
Period End2020-12-262019-12-282018-12-292017-12-302016-12-312015-12-262014-12-272013-12-282012-12-29
Value232228249302631385153
Percentage of IntangibleAssetsNetIncludingGoodwill47.944.544.537.135.136.640.043.868.4
Percentage of Assets21.421.222.07.37.89.111.014.815.9
Percentage of Assets country:DE0.00.00.00.00.00.00.00.00.0

country:JP


Intangible
Period End2020-12-262019-12-282018-12-292017-12-30
Value3.7033.8724.1384.491
Percentage of IntangibleAssetsNetIncludingGoodwill0.80.80.75.5
Percentage of Assets0.30.40.41.1
Percentage of Assets country:JP0.00.00.00.0

country:SG


Intangible
Period End2020-12-262019-12-282018-12-292017-12-302016-12-312015-12-262014-12-272013-12-282012-12-29
Value1313156.5586.5586.5586.5586.5586.558
Percentage of IntangibleAssetsNetIncludingGoodwill2.82.72.78.08.67.76.85.68.4
Percentage of Assets1.21.31.31.61.91.91.91.92.0
Percentage of Assets country:SG0.00.00.00.00.00.00.00.00.0

country:US


Intangible
Period End2020-12-262019-12-282018-12-292017-12-302016-12-312015-12-262014-12-272013-12-282012-12-29
Value177207228171717171717
Percentage of IntangibleAssetsNetIncludingGoodwill36.540.440.620.922.520.217.915.223.1
Percentage of Assets16.319.320.14.15.05.04.95.15.4
Percentage of Assets country:US0.00.00.00.00.00.00.00.00.0

Operating Lease Right Of Use Asset

us-gaap:OperatingLeaseRightOfUseAsset

us-gaap:OperatingLeaseRightOfUseAsset


Operating
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-30
Value26292930313233343529
Percentage of OperatingLeaseRightOfUseAsset100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets2.02.42.72.93.03.03.13.23.22.7

Other Assets Noncurrent

us-gaap:OtherAssetsNoncurrent

us-gaap:OtherAssetsNoncurrent


Other
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-312016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282013-06-292013-03-302012-12-292012-09-292012-06-302012-03-312011-12-312011-09-242011-06-252010-12-25
Value23192323212120161415139.7076.5247.1756.4867.3817.277.475.4456.4776.4086.546.3225.625.6335.4215.9285.7835.8235.6095.7213.770.8760.7030.5930.9491.2630.940.9231.061.0521.001
Percentage of OtherAssetsNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.71.52.12.32.12.01.91.61.41.41.22.21.51.71.51.81.82.01.61.91.81.91.81.71.71.61.71.61.61.61.71.10.30.20.20.30.40.30.30.30.30.3

Accounts Payable Current

us-gaap:AccountsPayableCurrent

us-gaap:AccountsPayableCurrent


Accounts
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-312016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282013-06-292013-03-302012-12-292012-09-292012-06-302012-03-312011-12-312011-09-242011-06-252010-12-25
Value1029767496053484854464839414037294037312528332725283025343226261821181318151618221918
Percentage of AccountsPayableCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets7.47.86.24.75.65.04.54.54.94.24.29.09.59.78.97.410.110.09.17.48.29.47.97.88.59.17.49.49.07.97.55.56.25.33.95.34.44.65.26.15.25.0

Accrued Income Taxes Current

us-gaap:AccruedIncomeTaxesCurrent

us-gaap:AccruedIncomeTaxesCurrent


Accrued
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-312016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282013-06-292013-03-302012-12-292012-09-292012-06-302012-03-312011-12-312011-09-242011-06-252010-12-25
Value197.5863.8574.7955.571113.8946.2666.0367.831116.0723.9051.5462.1592.7252.222.0891.921.7871.4184.4124.1954.964.5163.7323.1332.2641.0530.8460.8051.5151.972.0111.1092.5653.2663.122.5182.4573.8568.802
Percentage of AccruedIncomeTaxesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.40.60.40.50.51.10.40.60.50.71.01.40.90.40.50.70.60.60.60.50.41.31.21.51.31.10.90.60.30.20.20.40.60.60.30.70.90.90.70.71.02.4

Contract With Customer Liability Current

us-gaap:ContractWithCustomerLiabilityCurrent

us-gaap:ContractWithCustomerLiabilityCurrent


Contract
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292017-12-30
Value7.68715141117267.61616131010
Percentage of ContractWithCustomerLiabilityCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.61.21.31.11.72.50.71.51.51.31.02.5

Liabilities Current

us-gaap:LiabilitiesCurrent

us-gaap:LiabilitiesCurrent


Liabilities
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-312016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282013-06-292013-03-302012-12-292012-09-292012-06-302012-03-312011-12-312011-09-242011-06-252010-12-25
Value32120817414615916314813914613816089867885778581686364726363636669817161615558543647464751595771
Percentage of LiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets23.416.516.014.014.915.313.813.013.312.514.220.319.918.520.319.121.321.519.918.318.620.418.319.018.919.919.922.220.018.017.716.216.815.710.913.513.313.314.315.915.519.5

Long Term Debt Current

us-gaap:LongTermDebtCurrent

us-gaap:LongTermDebtCurrent


Long
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292017-12-30
Value1058.8518.3898.1997.9196.5666.5176.3826.4876.5826.6764.388
Percentage of LongTermDebtCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets7.70.70.80.80.70.60.60.60.60.60.61.0

us-gaap:LongTermDebtCurrent us-gaap:DebtInstrument

cohu:KitaTermLoans


Long
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-29
Value0.30.33.60.30.30.30.40.50.50.70.9
Percentage of LongTermDebtCurrent0.33.442.93.73.84.66.17.87.710.613.5
Percentage of Assets0.00.00.30.00.00.00.00.00.00.10.1
Percentage of Assets cohu:KitaTermLoans0.00.00.00.00.00.00.00.00.00.00.0

cohu:SecuredTermLoanFacility


Long
Period End2021-06-302021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-29
Value1001012.72.42.32.32.32.32.42.42.42.4
Percentage of LongTermDebtCurrent0.096.030.528.628.129.035.035.337.637.036.535.9
Percentage of Assets0.07.40.20.20.20.20.20.20.20.20.20.2
Percentage of Assets cohu:SecuredTermLoanFacility0.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:LongTermDebtCurrent us-gaap:DebtInstrument, us-gaap:LongtermDebtType

cohu:LoanFacilities, us-gaap:ConstructionLoans


Long
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-28
Value0.80.80.40.40.40.40.3
Percentage of LongTermDebtCurrent0.89.04.84.95.16.14.6
Percentage of Assets0.10.10.00.00.00.00.0
Percentage of Assets cohu:LoanFacilities us-gaap:ConstructionLoans0.00.00.00.00.00.00.0

Operating Lease Liability Current

us-gaap:OperatingLeaseLiabilityCurrent

us-gaap:OperatingLeaseLiabilityCurrent


Operating
Period End2020-09-262020-06-272019-12-28
Value5099000.05462000.05458000.0
Percentage of OperatingLeaseLiabilityCurrent100.0100.0100.0
Percentage of Assets0.50.50.5

us-gaap:OperatingLeaseLiabilityCurrent us-gaap:BalanceSheetLocation

cohu:OtherAccruedLiabilities


Operating
Period End2021-06-262021-03-272020-12-262020-03-282019-12-28
Value4796000.05490000.05287000.05592000.05458000.0
Percentage of OperatingLeaseLiabilityCurrent0.00.00.00.0100.0
Percentage of Assets0.30.40.50.50.5
Percentage of Assets cohu:OtherAccruedLiabilities0.00.00.00.00.0

Other Accrued Liabilities Current

us-gaap:OtherAccruedLiabilitiesCurrent

us-gaap:OtherAccruedLiabilitiesCurrent


Other
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-312016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282013-06-292013-03-302012-12-292012-09-292012-06-302012-03-312011-12-312011-09-242011-06-252010-12-25
Value262630232629513839385015149.959101011129.9329.1378.933108.5636.1346.0996.5717.1848.027.5287.8627.8158.3018.3889.1264.9526.7097.6068.4328.4546.9735.5816.973
Percentage of OtherAccruedLiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.92.12.82.22.52.74.83.63.63.54.43.63.32.42.42.62.83.32.92.62.62.92.51.81.82.02.12.22.12.32.32.42.42.61.51.92.22.42.31.91.51.9

Long Term Debt

us-gaap:LongTermDebt

us-gaap:LongTermDebt


Long
Period End2020-12-262019-12-282018-12-29
Value325360358
Percentage of LongTermDebt100.0100.0100.0
Percentage of Assets29.933.431.6

us-gaap:LongTermDebt us-gaap:DebtInstrument

cohu:KitaTermLoans


Long
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-29
Value3.33.43.63.73.73.73.84.04.24.34.6
Percentage of LongTermDebt0.00.01.10.00.00.01.10.00.00.01.3
Percentage of Assets0.20.30.30.40.30.30.40.40.40.40.4
Percentage of Assets cohu:KitaTermLoans0.00.00.00.00.00.00.00.00.00.00.0

cohu:SecuredTermLoanFacility


Long
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-29
Value200201301321337338339338339340340
Percentage of LongTermDebt0.00.092.50.00.00.094.10.00.00.095.0
Percentage of Assets14.616.027.630.731.731.631.531.630.830.730.0
Percentage of Assets cohu:SecuredTermLoanFacility0.00.00.00.00.00.00.00.00.00.00.0

us-gaap:LongTermDebt us-gaap:DebtInstrument, us-gaap:LongtermDebtType

cohu:LoanFacilities, us-gaap:ConstructionLoans


Long
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-28
Value10109.99.58.46.65.5
Percentage of LongTermDebt0.00.03.00.00.00.01.5
Percentage of Assets0.80.80.90.90.80.60.5
Percentage of Assets cohu:LoanFacilities us-gaap:ConstructionLoans0.00.00.00.00.00.00.0

Long Term Debt Noncurrent

us-gaap:LongTermDebtNoncurrent

us-gaap:LongTermDebtNoncurrent


Long
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292017-12-30
Value1112113113313483463463443413423434.575
Percentage of LongTermDebtNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets8.116.828.631.732.632.432.232.231.031.030.31.1

Deferred Income Tax Liabilities Net

us-gaap:DeferredIncomeTaxLiabilitiesNet

us-gaap:DeferredIncomeTaxLiabilitiesNet


Deferred
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282018-12-29
Value2725282827293138
Percentage of DeferredIncomeTaxLiabilitiesNet100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets2.02.02.62.82.62.72.93.4

Operating Lease Liability Noncurrent

us-gaap:OperatingLeaseLiabilityNoncurrent

us-gaap:OperatingLeaseLiabilityNoncurrent


Operating
Period End2020-09-262020-06-272020-03-282019-12-28
Value26272828
Percentage of OperatingLeaseLiabilityNoncurrent100.0100.0100.0100.0
Percentage of Assets2.52.62.62.7

us-gaap:OperatingLeaseLiabilityNoncurrent us-gaap:BalanceSheetLocation

cohu:LongtermLeaseLiabilities


Operating
Period End2021-06-262021-03-272020-12-262019-12-28
Value23262528
Percentage of OperatingLeaseLiabilityNoncurrent0.00.00.0100.0
Percentage of Assets1.72.12.32.7
Percentage of Assets cohu:LongtermLeaseLiabilities0.00.00.00.0

Lessee Operating Lease Liability Payments Due Year Two

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo


Lessee
Period End2021-06-262021-03-272020-12-262020-09-26
Value5177000.05771000.06187000.05932000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearTwo100.0100.0100.0100.0
Percentage of Assets0.40.50.60.6

Lessee Operating Lease Liability Payments Due Year Three

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree


Lessee
Period End2021-06-262021-03-272020-12-262020-09-26
Value4898000.05139000.05297000.05158000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearThree100.0100.0100.0100.0
Percentage of Assets0.40.40.50.5

Lessee Operating Lease Liability Payments Due Year Four

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour


Lessee
Period End2021-06-262021-03-272020-12-262020-09-26
Value4823000.04820000.04766000.04750000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearFour100.0100.0100.0100.0
Percentage of Assets0.40.40.40.5

Lessee Operating Lease Liability Payments Due Year Five

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive


Lessee
Period End2020-12-26
Value4428000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearFive100.0
Percentage of Assets0.4

Lessee Operating Lease Liability Payments Due After Year Five

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive


Lessee
Period End2020-12-26
Value11
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive100.0
Percentage of Assets1.1

Operating Lease Liability

us-gaap:OperatingLeaseLiability

us-gaap:OperatingLeaseLiability


Operating
Period End2020-09-26
Value31
Percentage of OperatingLeaseLiability100.0
Percentage of Assets3.0

us-gaap:OperatingLeaseLiability us-gaap:BalanceSheetLocation

cohu:OtherAccruedLiabilitiesAndLongtermLeaseLiabilities


Operating
Period End2021-06-262021-03-272020-12-262019-12-28
Value28313034
Percentage of OperatingLeaseLiability0.00.00.00.0
Percentage of Assets2.12.52.83.2
Percentage of Assets cohu:OtherAccruedLiabilitiesAndLongtermLeaseLiabilities0.00.00.00.0

Lessee Operating Lease Liability Payments Due

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue


Lessee
Period End2021-06-262021-03-272020-12-262020-09-26
Value36403940
Percentage of LesseeOperatingLeaseLiabilityPaymentsDue100.0100.0100.0100.0
Percentage of Assets2.73.23.63.9

Lessee Operating Lease Liability Undiscounted Excess Amount

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount


Lessee
Period End2021-06-262021-03-272020-12-262020-09-26
Value7957000.08557000.08783000.09185000.0
Percentage of LesseeOperatingLeaseLiabilityUndiscountedExcessAmount100.0100.0100.0100.0
Percentage of Assets0.60.70.80.9

Stockholders Equity

us-gaap:StockholdersEquity

us-gaap:StockholdersEquity


Stockholders
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-312016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282013-06-292013-03-302012-12-292012-09-292012-06-302012-03-312011-12-312011-09-242011-06-252010-12-252009-12-262008-12-27
Value850749512474466464483491514528546309304298289278264245235240239236238236239234247254254249253256262264280283283290291292294274257285
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets62.059.547.045.443.843.444.845.946.747.848.269.869.970.668.868.965.964.868.269.369.067.269.071.171.070.070.869.671.472.973.375.175.476.283.981.481.581.580.578.979.275.10.00.0

us-gaap:StockholdersEquity us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome


Stockholders
Period End2021-06-262021-03-272020-12-262020-06-272020-03-282019-12-282017-12-302016-12-312015-12-262014-12-272013-12-282012-12-292011-12-312010-12-252009-12-262008-12-27
Value-14.24-14.758-4.326-33.062-34.959-34.03-17.787-27.882-21.772-10.7146.6511.783-0.012-0.1978.6627.134
Percentage of StockholdersEquity-1.7-2.0-0.8-7.1-7.5-7.0-6.2-11.8-9.1-4.32.60.6-0.0-0.13.42.5
Percentage of Assets-1.0-1.2-0.4-3.1-3.3-3.2-4.2-8.1-6.3-3.11.90.5-0.0-0.10.00.0
Percentage of Assets us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AdditionalPaidInCapital


Stockholders
Period End2021-06-262021-03-272020-12-262020-06-272020-03-282019-12-282017-12-302016-12-312015-12-262014-12-272013-12-282012-12-292011-12-312010-12-252009-12-262008-12-27
Value66666144843943543312711110597898377716461
Percentage of StockholdersEquity78.488.387.594.393.789.744.247.544.339.635.529.726.726.125.221.4
Percentage of Assets48.652.641.141.240.640.230.432.430.628.126.024.921.519.60.00.0
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CommonStock


Stockholders
Period End2021-06-262021-03-272020-12-262020-06-272020-03-282019-12-282017-12-302016-12-312015-12-262014-12-272013-12-282012-12-292011-12-312010-12-252009-12-262008-12-27
Value48484241414128262625252424232323
Percentage of StockholdersEquity5.76.58.29.09.08.69.911.411.010.49.98.88.48.79.28.2
Percentage of Assets3.53.83.93.93.93.86.87.87.67.47.37.46.76.60.00.0
Percentage of Assets us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings


Stockholders
Period End2021-06-262021-03-272020-12-262020-06-272020-03-282019-12-282017-12-302016-12-312015-12-262014-12-272013-12-282012-12-292011-12-312010-12-252009-12-262008-12-27
Value1485326182242150124128134131170189179160193
Percentage of StockholdersEquity17.57.25.13.94.98.852.152.953.854.352.060.965.065.262.367.9
Percentage of Assets10.94.32.41.72.13.935.836.137.138.538.151.052.348.90.00.0
Percentage of Assets us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Stockholders Equity Including Portion Attributable To Noncontrolling Interest

us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest

us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest


Stockholders
Period End2020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302016-12-312015-12-31
Value512474466464483491514528545309304298289235238
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets47.045.443.843.444.845.946.647.848.169.869.970.668.868.20.0

us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome


Stockholders
Period End2020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302016-12-312015-12-31
Value-4.326-21.37-33.062-34.959-34.03-40.26-27.019-30.664-25.88-21.198-20.708-14.016-17.787-27.882-21.772
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest-0.8-4.5-7.1-7.5-7.0-8.2-5.3-5.8-4.7-6.9-6.8-4.7-6.2-11.8-9.1
Percentage of Assets-0.4-2.0-3.1-3.3-3.2-3.8-2.4-2.8-2.3-4.8-4.8-3.3-4.2-8.10.0
Percentage of Assets us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AdditionalPaidInCapital


Stockholders
Period End2020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302016-12-312015-12-31
Value448442439435433428425421419130128125127111105
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest87.593.394.393.789.787.282.779.876.942.142.142.044.247.544.3
Percentage of Assets41.142.341.240.640.240.038.638.137.029.429.429.730.432.40.0
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CommonStock


Stockholders
Period End2020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302016-12-312015-12-31
Value424141414141414140282828282626
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest8.28.89.09.08.68.48.07.87.59.49.59.79.911.411.0
Percentage of Assets3.94.03.93.93.83.93.73.73.66.56.66.86.87.80.0
Percentage of Assets us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings


Stockholders
Period End2020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302016-12-312015-12-31
Value2611182242627596111171168158150124128
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest5.12.43.94.98.812.714.618.320.555.455.253.052.152.953.8
Percentage of Assets2.41.11.72.13.95.86.88.89.838.638.637.435.836.10.0
Percentage of Assets us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Common Stock Value

us-gaap:CommonStockValue

us-gaap:CommonStockValue


Common
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-312016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282013-06-292013-03-302012-12-292012-09-292012-06-302012-03-312011-12-312011-09-242011-06-252010-12-25
Value484842414141414141414028282828282727262626262626262525252525252424242424242424242423
Percentage of CommonStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets3.53.83.94.03.93.93.83.93.73.73.66.56.66.86.87.06.97.27.87.77.77.57.67.97.87.77.47.07.17.47.37.37.27.17.47.07.06.86.76.56.56.6

Additional Paid In Capital Common Stock

us-gaap:AdditionalPaidInCapitalCommonStock

us-gaap:AdditionalPaidInCapitalCommonStock


Additional
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-312016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282013-06-292013-03-302012-12-292012-09-292012-06-302012-03-312011-12-312011-09-242011-06-252010-12-25
Value6666614484424394354334284254214191301281251271231181121111081071041051021019897959390898886848381807877767571
Percentage of AdditionalPaidInCapitalCommonStock100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets48.652.641.142.341.240.640.240.038.638.137.029.429.429.730.430.429.629.632.431.430.829.830.631.030.129.328.126.226.126.426.025.824.924.324.923.423.222.221.520.520.219.6

Retained Earnings Accumulated Deficit

us-gaap:RetainedEarningsAccumulatedDeficit

us-gaap:RetainedEarningsAccumulatedDeficit


Retained
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-312016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282013-06-292013-03-302012-12-292012-09-292012-06-302012-03-312011-12-312011-09-242011-06-252010-12-25
Value148532611182242627596111171168158150145138129124124125124128127128129134135129126131139151157170177180184189189187179
Percentage of RetainedEarningsAccumulatedDeficit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets10.94.32.41.11.72.13.95.86.88.89.838.638.637.435.836.034.534.236.135.836.235.337.138.438.138.738.537.036.337.038.140.943.645.351.050.952.051.852.351.150.548.9

Accumulated Other Comprehensive Income Loss Net Of Tax

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax


Accumulated
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-312016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282013-06-292013-03-302012-12-292012-09-292012-06-302012-03-312011-12-312011-09-242011-06-252010-12-25
Value-14240000.0-14758000.0-4326000.0-21370000.0-33062000.0-34959000.0-34030000.0-40260000.0-27019000.0-30664000.0-25880000.0-21198000.0-20708000.0-14016000.0-17787000.0-18016000.0-20604000.0-23904000.0-27882000.0-19084000.0-19640000.0-19284000.0-21772000.0-20501000.0-16379000.0-19112000.0-10714000.0-2153000.06476000.06980000.06651000.03644000.0-1006000.0-2163000.01783000.0-171000.0-2349000.02615000.0-12000.02532000.07353000.0-197000.0
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets-1.0-1.2-0.4-2.0-3.1-3.3-3.2-3.8-2.4-2.8-2.3-4.8-4.8-3.3-4.2-4.5-5.1-6.3-8.1-5.5-5.7-5.5-6.3-6.2-4.9-5.7-3.1-0.61.82.01.91.1-0.3-0.60.5-0.0-0.70.7-0.00.72.0-0.1

Stock Issued During Period Value New Issues

us-gaap:StockIssuedDuringPeriodValueNewIssues

us-gaap:StockIssuedDuringPeriodValueNewIssues


Stock
Period End2021-06-262021-03-27
Value0.0223
Percentage of StockIssuedDuringPeriodValueNewIssues0.0100.0
Percentage of Assets0.00.0

us-gaap:StockIssuedDuringPeriodValueNewIssues us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Stock
Period End2021-06-262021-03-27
Value0.0217
Percentage of StockIssuedDuringPeriodValueNewIssues0.097.4
Percentage of Assets0.00.0
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.0

us-gaap:CommonStock


Stock
Period End2021-06-262021-03-27
Value0.05.693
Percentage of StockIssuedDuringPeriodValueNewIssues0.02.6
Percentage of Assets0.00.0
Percentage of Assets us-gaap:CommonStock0.00.0

Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue


Adjustments
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-31
Value4.1343.5233.9213.2993.4033.6113.2873.5063.6623.693121.8791.9481.669
Percentage of AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Adjustments
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-31
Value4.1343.5233.9213.2993.4033.6113.2873.5063.6623.693121.8791.9481.669
Percentage of AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInOperatingActivities


Net
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-312016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282013-06-292013-03-302012-12-292012-09-292012-06-302012-03-312011-12-312011-09-242011-06-252011-03-262010-12-252010-09-25
Value296.1432114-4.52417138.211-9.4934.725.232315-9.27716264.41-7.2026.001127.421-1.459-3.0820-0.4654.215146.0437.918-8.9421.5390.4547.927-6.5032.3824.9415.1710.6755.7033.855-4.7457.4258.4131.637
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax12.02.710.79.8-3.112.89.75.7-6.33.23.127.015.2-9.719.228.24.7-8.98.518.29.7-2.2-4.930.8-0.66.215.26.410.2-13.12.40.811.9-11.64.78.68.71.38.65.4-5.98.38.71.9

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities


Net
Period End2021-06-262021-03-272020-09-262020-06-272020-03-282019-09-282019-06-292019-03-302018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-312016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282013-06-292013-03-302012-12-292012-09-292012-06-302012-03-312011-12-312011-09-242011-06-252011-03-262010-12-252010-09-25
Value185-129.8578.861-3.9281.465-4.242-4.065-3.52122-0.073-4.319-6.3483.146-0.317-3.525-13.172-11.227-0.511-8.00629-1.4883.794-1.0260.015-1.0510-0.4943.989-1.069-0.698-53.54826125.954-3.031-1.1630.6255.693-5.9615.122-10.915
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax75.6-57.65.9-2.71.1-3.0-2.7-2.426.4-0.1-4.5-7.53.4-0.3-4.3-18.6-16.2-0.7-12.246.9-2.25.0-1.50.0-1.113.1-0.76.2-1.8-1.0-95.651.620.910.0-5.7-1.70.97.0-6.65.3-12.7

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities


Net
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-312016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282013-06-292013-03-302012-12-292012-09-292012-06-302012-03-312011-12-312011-09-242011-06-252011-03-262010-12-252010-09-25
Value-3.089116-18.513-16.977-0.336-2.2460.2660.154-3.312-5.291331-1.937-1.104-6.5271.170.6163.392-3.033-0.634-1.365-2.74-1.968-0.535-1.469-0.209-2.769-0.863-0.441-0.603-2.269-1.08-1.285-0.368-0.419-2.423-1.354-0.759-1.227-1.141-1.314-0.564-0.845-0.6320.108
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax-1.351.7-9.1-11.3-0.2-1.60.20.1-2.2-3.6194.4-2.2-1.1-6.91.40.73.6-3.7-0.9-2.0-3.6-3.0-0.8-2.2-0.3-4.1-0.9-0.5-0.8-3.3-1.7-2.1-0.6-0.7-4.8-2.3-1.3-2.3-1.7-1.8-0.7-0.9-0.70.1

Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect


Cash
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-31
Value210-6.239-20.5687.198-8.746159.662.506-16.577-4.58-5.7744311-19.15
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax86.1-2.8-10.24.8-6.111.26.81.7-11.1-3.1-3.450.711.9-20.1

Amortization Of Financing Costs

us-gaap:AmortizationOfFinancingCosts

us-gaap:AmortizationOfFinancingCosts


Amortization
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-30
Value200000.0300000.0300000.0300000.0300000.0300000.0300000.0300000.0300000.0300000.0
Percentage of AmortizationOfFinancingCosts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Deferred Income Tax Expense Benefit

us-gaap:DeferredIncomeTaxExpenseBenefit

us-gaap:DeferredIncomeTaxExpenseBenefit


Deferred
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-312016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282013-06-292013-03-302012-12-292012-09-292012-06-302012-03-312011-12-312011-09-242011-06-252011-03-262010-12-252010-09-25
Value0.1790.28-0.111-0.339-2.149-2.7062.313-0.238-4.966-2.494-7.954-0.739-0.020.506-2.8590.054-0.275-0.7110.046-0.371-0.205-0.5351.3080.063-0.368-0.7810.819-0.583-0.308-0.415-0.567-0.296-0.043-0.7510.8430.086-0.325-0.023-0.263-0.728-0.254-0.431-0.666-0.629
Percentage of DeferredIncomeTaxExpenseBenefit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Depreciation Depletion And Amortization

us-gaap:DepreciationDepletionAndAmortization

us-gaap:DepreciationDepletionAndAmortization


Depreciation
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-312016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282013-06-292013-03-302012-12-292012-09-292012-06-302012-03-312011-12-312011-09-242011-06-252011-03-262010-12-252010-09-25
Value12121313131213151515182.4022.4172.4572.4642.3922.1372.2022.3232.7242.6962.6692.742.7572.8632.9133.2993.3543.4233.4523.3923.8583.0883.1312.3152.2122.4342.4422.4712.3832.4442.7692.8522.561
Percentage of DepreciationDepletionAndAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Increase Decrease In Accounts Payable

us-gaap:IncreaseDecreaseInAccountsPayable

us-gaap:IncreaseDecreaseInAccountsPayable


Increase
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-312016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282013-06-292013-03-302012-12-292012-09-292012-06-302012-03-312011-12-312011-09-242011-06-252011-03-262010-12-252010-09-25
Value112818-10.2636.7330.055-0.318-6.8237.499-3.48-8.14-2.8160.9332.927.777-10.6541.5895.4457.787-2.623-4.5395.0531.157-1.346-1.715.275-8.4622.275.5870.9257.263-2.8343.211-0.982-5.2133.195-1.236-2.204-3.843.1250.6370.505-9.6361.514
Percentage of IncreaseDecreaseInAccountsPayable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Increase Decrease In Accounts Receivable

us-gaap:IncreaseDecreaseInAccountsReceivable

us-gaap:IncreaseDecreaseInAccountsReceivable


Increase
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-312016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282013-06-292013-03-302012-12-292012-09-292012-06-302012-03-312011-12-312011-09-242011-06-252011-03-262010-12-252010-09-25
Value324733-6.58910-17.0780.607-7.0112.911-17.657-13.877-13.1978.13713-5.754-14.0937.326157.69-5.884-2.4475.2583.89-11.7915.102-6.171-12.899165.1986.2012.59-2.2323.877-1.733-6.6351.3895.937-5.67-8.115-3.289-4.434-9.039-0.3212
Percentage of IncreaseDecreaseInAccountsReceivable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Increase Decrease In Inventories

us-gaap:IncreaseDecreaseInInventories

us-gaap:IncreaseDecreaseInInventories


Increase
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-312016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282013-06-292013-03-302012-12-292012-09-292012-06-302012-03-312011-12-312011-09-242011-06-252011-03-262010-12-252010-09-25
Value4.829203.583-1.7317.0636.067-0.686-1.8394.974-2.475-4.5981.1591.0580.3385.495-2.8564.8274.73-1.057-2.506-3.5632.5180.47-0.4091.2164.466-4.158-0.212.683.538-1.35-7.412-5.51.21-6.429-4.18-9.229-0.059-1.0087.8489.0524.973-1.6334.275
Percentage of IncreaseDecreaseInInventories100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInOperatingActivities


Net
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-312016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282013-06-292013-03-302012-12-292012-09-292012-06-302012-03-312011-12-312011-09-242011-06-252011-03-262010-12-252010-09-25
Value296.1432114-4.52417138.211-9.4934.725.232315-9.27716264.41-7.2026.001127.421-1.459-3.0820-0.4654.215146.0437.918-8.9421.5390.4547.927-6.5032.3824.9415.1710.6755.7033.855-4.7457.4258.4131.637
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax12.02.710.79.8-3.112.89.75.7-6.33.23.127.015.2-9.719.228.24.7-8.98.518.29.7-2.2-4.930.8-0.66.215.26.410.2-13.12.40.811.9-11.64.78.68.71.38.65.4-5.98.38.71.9

Net Income Loss

us-gaap:NetIncomeLoss

us-gaap:NetIncomeLoss


Net
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-07-012017-06-242017-04-012017-03-252016-12-312016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282013-06-292013-03-302012-12-292012-09-292012-06-302012-03-312011-12-312011-09-242011-06-252011-03-262010-12-252010-09-252010-06-26
Value952714-6.646-4.74-17.276-17.266-10.468-19.323-22.643-56.7544.803118.1226.8958.75510106.7636.7632.0890.2692.607-1.9111.9491.113-0.072-2.740.3747.5194.163-3.347-6.45-10.82-4.045-12.103-5.161-1.749-2.109-3.2240.7193.3765.056.5749.4287.6116.698
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax38.812.27.3-4.4-3.3-12.4-12.2-7.3-12.9-15.3-33.35.611.78.58.29.311.111.18.38.33.00.43.4-2.93.11.6-0.1-4.00.48.05.3-4.9-10.0-18.0-6.1-21.6-10.2-3.0-3.6-6.01.14.76.27.39.78.88.9

us-gaap:NetIncomeLoss us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings


Net
Period End2021-06-262021-03-272020-06-272020-03-28
Value9527-4.74-17.276
Percentage of NetIncomeLoss100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax38.812.2-3.3-12.4
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:RetainedEarnings0.00.00.00.0

Profit Loss

us-gaap:ProfitLoss

us-gaap:ProfitLoss


Profit
Period End2020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-07-012017-04-01
Value14-6.646-4.74-17.276-17.32-10.326-19.359-22.687-56.9974.803118.1226.8958.755106.763
Percentage of ProfitLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax7.3-4.4-3.3-12.4-12.2-7.2-12.9-15.3-33.45.611.78.58.29.311.18.3

Share Based Compensation

us-gaap:ShareBasedCompensation

us-gaap:ShareBasedCompensation


Share
Period End2021-06-262021-03-272020-09-262020-06-272020-03-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-312016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282013-06-292013-03-302012-12-292012-09-292012-06-302012-03-312011-12-312011-09-242011-06-252011-03-262010-12-252010-09-25
Value3.5063.5233.2993.4033.6113.5063.6623.693121.881.9481.6691.6711.861.7591.7171.8671.6681.6511.9571.6741.6371.7151.7291.7951.6221.6871.5171.5061.1861.3241.4211.3670.9591.2511.0441.3780.9230.9381.0481.00.962
Percentage of ShareBasedCompensation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities


Net
Period End2021-06-262021-03-272020-09-262020-06-272020-03-282019-09-282019-06-292019-03-302018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-312016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282013-06-292013-03-302012-12-292012-09-292012-06-302012-03-312011-12-312011-09-242011-06-252011-03-262010-12-252010-09-25
Value185-129.8578.861-3.9281.465-4.242-4.065-3.52122-0.073-4.319-6.3483.146-0.317-3.525-13.172-11.227-0.511-8.00629-1.4883.794-1.0260.015-1.0510-0.4943.989-1.069-0.698-53.54826125.954-3.031-1.1630.6255.693-5.9615.122-10.915
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax75.6-57.65.9-2.71.1-3.0-2.7-2.426.4-0.1-4.5-7.53.4-0.3-4.3-18.6-16.2-0.7-12.246.9-2.25.0-1.50.0-1.113.1-0.76.2-1.8-1.0-95.651.620.910.0-5.7-1.70.97.0-6.65.3-12.7

Payments To Acquire Property Plant And Equipment

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment


Payments
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-312016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282013-06-292013-03-302012-12-292012-09-292012-06-302012-03-312011-12-312011-09-242011-06-252011-03-262010-12-252010-09-25
Value2.8492.75.1015.5966.3791.5844.6534.954.8713.5262.4950.6120.7861.0741.3542.3240.9851.430.6551.030.8720.8952.8991.4881.1281.0710.4190.1350.3760.731.3951.261.0440.2090.8511.1270.3320.9570.1230.8580.2450.1871.1931.395
Percentage of PaymentsToAcquirePropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities


Net
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-312016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282013-06-292013-03-302012-12-292012-09-292012-06-302012-03-312011-12-312011-09-242011-06-252011-03-262010-12-252010-09-25
Value-3.089116-18.513-16.977-0.336-2.2460.2660.154-3.312-5.291331-1.937-1.104-6.5271.170.6163.392-3.033-0.634-1.365-2.74-1.968-0.535-1.469-0.209-2.769-0.863-0.441-0.603-2.269-1.08-1.285-0.368-0.419-2.423-1.354-0.759-1.227-1.141-1.314-0.564-0.845-0.6320.108
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax-1.351.7-9.1-11.3-0.2-1.60.20.1-2.2-3.6194.4-2.2-1.1-6.91.40.73.6-3.7-0.9-2.0-3.6-3.0-0.8-2.2-0.3-4.1-0.9-0.5-0.8-3.3-1.7-2.1-0.6-0.7-4.8-2.3-1.3-2.3-1.7-1.8-0.7-0.9-0.70.1

Proceeds From Issuance Of Long Term Debt

us-gaap:ProceedsFromIssuanceOfLongTermDebt

us-gaap:ProceedsFromIssuanceOfLongTermDebt


Proceeds
Period End2020-09-262019-09-28
Value1.5333.72
Percentage of ProceedsFromIssuanceOfLongTermDebt100.0100.0

us-gaap:ProceedsFromIssuanceOfLongTermDebt us-gaap:DebtInstrument, us-gaap:LongtermDebtType

cohu:SecondFacility, us-gaap:ConstructionLoans


Proceeds
Period End2020-12-262020-09-262020-06-272020-03-282019-12-10
Value0.10.71.62.51.5
Percentage of ProceedsFromIssuanceOfLongTermDebt0.045.70.00.00.0

Repayments Of Long Term Debt

us-gaap:RepaymentsOfLongTermDebt

us-gaap:RepaymentsOfLongTermDebt


Repayments
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-28
Value2.88910120181.0291.1330.2190.987
Percentage of RepaymentsOfLongTermDebt100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RepaymentsOfLongTermDebt us-gaap:DebtInstrument

cohu:SecuredTermLoanFacility


Repayments
Period End2021-06-262021-03-272020-08-31
Value0.010015
Percentage of RepaymentsOfLongTermDebt0.098.10.0

us-gaap:RepaymentsOfLongTermDebt us-gaap:DebtInstrument, us-gaap:SubsequentEventType

cohu:SecuredTermLoanFacility, us-gaap:SubsequentEvent


Repayments
Period End2021-06-30
Value100
Percentage of RepaymentsOfLongTermDebt0.0

Payments Of Dividends Common Stock

us-gaap:PaymentsOfDividendsCommonStock

us-gaap:PaymentsOfDividendsCommonStock


Payments
Period End2020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-312016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282012-12-292012-09-292012-06-302012-03-312011-12-312011-09-242011-06-252011-03-262010-12-252010-09-25
Value002488000.02483000.02468000.02466000.02450000.02443000.01732000.01733000.01712000.01772000.01683000.01673000.01615000.01606000.01603000.01600000.01575000.01573000.01567000.01566000.01543000.01539000.01532000.01524000.01507000.01504000.01496000.01494000.02945000.01468000.01462000.01458000.01450000.01448000.01443000.01436000.01432000.01423000.0
Percentage of PaymentsOfDividendsCommonStock0.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Debt Instrument Interest Rate Stated Percentage

us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:DebtInstrument

us-gaap:DebtInstrumentInterestRateStatedPercentage

cohu:XcerraTermLoan


Debt
Period End2020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-29
Value2.352.350.02350.02350.02350.02350.02350.02350.0235
Percentage of DebtInstrumentInterestRateStatedPercentage100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of LongTermDebtAndCapitalLeaseObligations0.00.00.00.00.00.00.00.00.0
Percentage of LongTermDebtAndCapitalLeaseObligations cohu:XcerraTermLoan0.00.00.00.00.00.00.00.00.0

us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:DebtInstrument, us-gaap:LongtermDebtType

cohu:SecondFacility, us-gaap:ConstructionLoans


Debt
Period End2021-03-272020-09-262020-06-272020-03-282019-12-10
Value1.051.050.01050.01050.0105
Percentage of DebtInstrumentInterestRateStatedPercentage0.044.744.744.70.0
Percentage of LongTermDebtAndCapitalLeaseObligations0.00.00.00.00.0
Percentage of LongTermDebtAndCapitalLeaseObligations cohu:SecondFacility us-gaap:ConstructionLoans0.00.00.00.00.0

cohu:ThirdFacility, us-gaap:ConstructionLoans


Debt
Period End2021-06-262021-03-272020-12-262020-09-262020-06-27
Value1.21.21.21.20.012
Percentage of DebtInstrumentInterestRateStatedPercentage0.00.051.151.151.1
Percentage of LongTermDebtAndCapitalLeaseObligations0.00.00.00.00.0
Percentage of LongTermDebtAndCapitalLeaseObligations cohu:ThirdFacility us-gaap:ConstructionLoans0.00.00.00.00.0

us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:Range, us-gaap:DebtInstrument

srt:Maximum, cohu:KitaTermLoans


Debt
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-29
Value0.440.430.440.40.0040.00430.00430.00440.00450.00450.0045
Percentage of DebtInstrumentInterestRateStatedPercentage0.00.018.717.017.018.318.318.719.119.119.1
Percentage of LongTermDebtAndCapitalLeaseObligations0.00.00.00.00.00.00.00.00.00.00.0
Percentage of LongTermDebtAndCapitalLeaseObligations srt:Maximum cohu:KitaTermLoans0.00.00.00.00.00.00.00.00.00.00.0

srt:Minimum, cohu:KitaTermLoans


Debt
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-29
Value0.050.050.050.050.00050.00050.00050.00050.00050.00050.0005
Percentage of DebtInstrumentInterestRateStatedPercentage0.00.02.12.12.12.12.12.12.12.12.1
Percentage of LongTermDebtAndCapitalLeaseObligations0.00.00.00.00.00.00.00.00.00.00.0
Percentage of LongTermDebtAndCapitalLeaseObligations srt:Minimum cohu:KitaTermLoans0.00.00.00.00.00.00.00.00.00.00.0

Effective Income Tax Rate Continuing Operations

us-gaap:EffectiveIncomeTaxRateContinuingOperations

us-gaap:EffectiveIncomeTaxRateContinuingOperations


Effective
Period End2021-06-262021-03-272020-09-262020-06-272020-03-282019-09-282019-06-292019-03-302018-09-292018-06-302018-03-312017-09-302017-06-242017-03-252016-09-242016-06-252016-03-282016-03-262015-09-262015-06-272015-03-282014-09-272014-06-282014-03-292013-09-282013-06-292013-03-302012-09-292012-06-302012-03-312011-09-242011-06-25
Value15.711.5-20.2-0.030.054-0.1390.0450.0090.3240.1750.2080.1730.0910.1670.7960.2220.131-0.1510.4130.067-0.6130.2650.1130.0160.0940.1120.0630.0640.0670.1080.2170.151
Percentage of EffectiveIncomeTaxRateContinuingOperations100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber


Share
Period End2020-12-262019-12-282018-12-292017-12-302016-12-312015-12-262014-12-272013-12-282012-12-292011-12-312010-12-252009-12-26
Value262000.0363000.0405000.0472000.01641000.01965000.02435000.03086000.03113000.03112000.03210000.03221000.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Deferred Tax Liabilities

us-gaap:DeferredTaxLiabilities

us-gaap:DeferredTaxLiabilities


Deferred
Period End2020-12-262019-12-282018-12-292017-12-302016-12-312015-12-262014-12-272013-12-282012-12-292011-12-31
Value2326361.8365.5656.55114161212
Percentage of DeferredTaxLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Deferred Tax Assets Net

us-gaap:DeferredTaxAssetsNet

us-gaap:DeferredTaxAssetsNet


Deferred
Period End2020-12-262019-12-282018-12-292017-12-302016-12-312015-12-262014-12-272013-12-282012-12-292011-12-31
Value3646426.2412.5733.1437.159.1315.4146.746
Percentage of DeferredTaxAssetsNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Unrecognized Tax Benefits

us-gaap:UnrecognizedTaxBenefits

us-gaap:UnrecognizedTaxBenefits


Unrecognized
Period End2020-12-262019-12-282018-12-292017-12-302016-12-312015-12-262014-12-272013-12-282012-12-292011-12-312010-12-252009-12-26
Value33343410101010106.085.3815.0694.886
Percentage of UnrecognizedTaxBenefits100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Deferred Tax Assets Valuation Allowance

us-gaap:DeferredTaxAssetsValuationAllowance

us-gaap:DeferredTaxAssetsValuationAllowance


Deferred
Period End2020-12-262019-12-282018-12-292017-12-302016-12-312015-12-262014-12-272013-12-282012-12-292011-12-31
Value86938431444237362422
Percentage of DeferredTaxAssetsValuationAllowance100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

cohu:AmortizationOfInventoryStepupAndInventoryRelatedCharges

cohu:AmortizationOfInventoryStepupAndInventoryRelatedCharges


Amortization
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-30
Value1.581.11-0.552.6060.0721.6032.4080.694-1.2596.504
Percentage of AmortizationOfInventoryStepupAndInventoryRelatedCharges100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

cohu:CapitalizedCloudComputingServiceCostsButNotYetPaid

cohu:CapitalizedCloudComputingServiceCostsButNotYetPaid


Capitalized
Period End2021-06-262021-03-272020-09-262020-06-272020-03-282019-09-282019-06-292019-03-302018-12-29
Value435000.0757000.0-342000.0713000.01552000.0708000.0-367000.01844000.0-215000.0
Percentage of CapitalizedCloudComputingServiceCostsButNotYetPaid100.0100.0100.0100.0100.0100.0100.0100.0100.0

cohu:ExtinguishmentOfDebtDecreaseDeferredFinancingCosts us-gaap:DebtInstrument

cohu:ExtinguishmentOfDebtDecreaseDeferredFinancingCosts

cohu:SecuredTermLoanFacility


Extinguishment
Period End2021-06-262021-03-272020-08-31
Value01800000.0-300000.0
Percentage of ExtinguishmentOfDebtDecreaseDeferredFinancingCosts0.0100.0100.0

cohu:IncreaseDecreaseInAccruedCompensationWarrantyAndOtherLiabilities

cohu:IncreaseDecreaseInAccruedCompensationWarrantyAndOtherLiabilities


Increase
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-30
Value5825000.0-5457000.07309000.05363000.06319000.0-14313000.012441000.0-5058000.03762000.0-9002000.0
Percentage of IncreaseDecreaseInAccruedCompensationWarrantyAndOtherLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

cohu:IncreaseDecreaseInCurrentAndNoncurrentOperatingLeaseLiabilities

cohu:IncreaseDecreaseInCurrentAndNoncurrentOperatingLeaseLiabilities


Increase
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-28
Value-4892000.0-1427000.0-978000.0-1828000.0-1836000.0-1795000.0
Percentage of IncreaseDecreaseInCurrentAndNoncurrentOperatingLeaseLiabilities100.0100.0100.0100.0100.0100.0

cohu:IncreaseDecreaseInDeferredProfit

cohu:IncreaseDecreaseInDeferredProfit


Increase
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-31
Value4529000.04383000.0-3299000.02236000.0315000.01619000.0-99000.0-170000.0-108000.01374000.03500000.0190000.0-1188000.0-2465000.0
Percentage of IncreaseDecreaseInDeferredProfit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

cohu:IncreaseDecreaseInOperatingLeaseRightOfUseAssets

cohu:IncreaseDecreaseInOperatingLeaseRightOfUseAssets


Increase
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-28
Value-2363000.0-1556000.0-1594000.0-1720000.0-1674000.0-1843000.0
Percentage of IncreaseDecreaseInOperatingLeaseRightOfUseAssets100.0100.0100.0100.0100.0100.0

cohu:InterestCapitalizedAssociatedWithCloudComputingImplementation

cohu:InterestCapitalizedAssociatedWithCloudComputingImplementation


Interest
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-28
Value42000.043000.029000.019000.031000.045000.0100000.068000.0
Percentage of InterestCapitalizedAssociatedWithCloudComputingImplementation100.0100.0100.0100.0100.0100.0100.0100.0

cohu:InventoryCapitalizedAsPropertyPlantAndEquipment

cohu:InventoryCapitalizedAsPropertyPlantAndEquipment


Inventory
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-312016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282013-06-292013-03-302012-12-292012-09-292012-06-302012-03-312011-12-312011-09-242011-06-252011-03-262010-12-252010-09-25
Value542000.0455000.0223000.0488000.0101000.0238000.039000.066000.079000.0116000.0343000.0365000.065000.084000.077000.0-9000.080000.042000.0059000.027000.0115000.095000.048000.064000.0108000.0242000.0917000.081000.061000.085000.00182000.0390000.00152000.00415000.0414000.0204000.0463000.0299000.01163000.0247000.0
Percentage of InventoryCapitalizedAsPropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.00.0100.00.0100.0100.0100.0100.0100.0100.0100.0

cohu:IssuanceRepurchaseOfCommonStockNet

cohu:IssuanceRepurchaseOfCommonStockNet


Issuance
Period End2021-06-262021-03-272020-06-272020-03-28
Value-201000.0-5421000.0-47000.0253000.0
Percentage of IssuanceRepurchaseOfCommonStockNet100.0100.0100.0100.0

cohu:ProfitLossFromOperatingSegment

cohu:ProfitLossFromOperatingSegment


Profit
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-31
Value423917-2.384-0.32-10.579-12.435-2.317-13.66-14.025-43.7389.9411812
Percentage of ProfitLossFromOperatingSegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

cohu:ProfitLossFromOperatingSegment us-gaap:StatementBusinessSegments

cohu:PCBTest


Profit
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-30
Value1.4782.4292.2571.7092.0110.9940.2640.6120.741.019
Percentage of ProfitLossFromOperatingSegment3.56.212.7-71.7-628.4-9.4-2.1-26.4-5.4-7.3

cohu:SemiconductorTestAndInspection


Profit
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-31
Value403615-4.093-2.331-11.573-12.699-2.929-14.4-15.044-38.5849.9411812
Percentage of ProfitLossFromOperatingSegment96.593.887.3171.7728.4109.4102.1126.4105.4107.388.2100.0100.0100.0

cohu:StandardAndExtendedProductWarrantyAccrualDecreaseForDisposals

cohu:StandardAndExtendedProductWarrantyAccrualDecreaseForDisposals


Standard
Period End2021-06-26
Value945000.0
Percentage of StandardAndExtendedProductWarrantyAccrualDecreaseForDisposals100.0

cohu:TransferFromInProcessTechnologyToDevelopedTechnology

cohu:TransferFromInProcessTechnologyToDevelopedTechnology


Transfer
Period End2021-06-262021-03-272020-12-26
Value1900000.03700000.0500000.0
Percentage of TransferFromInProcessTechnologyToDevelopedTechnology100.0100.0100.0

us-gaap:AllocatedShareBasedCompensationExpenseNetOfTax

us-gaap:AllocatedShareBasedCompensationExpenseNetOfTax


Allocated
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-312016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282013-06-292013-03-302012-12-292012-09-292012-06-302012-03-312011-12-312011-09-242011-06-25
Value3.3263.2893.5683.0843.183.4393.1263.4393.5833.4134.1181.7651.8221.3551.571.7531.511.6421.7871.5921.5781.9171.7441.5671.6791.6851.7481.5621.6311.4761.5961.1611.3241.4211.3670.9591.2511.0441.3780.9230.938
Percentage of AllocatedShareBasedCompensationExpenseNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AmortizationOfFinancingCostsAndDiscounts

us-gaap:AmortizationOfFinancingCostsAndDiscounts


Amortization
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-09-292018-06-302018-03-31
Value191000.0250000.0285000.0300000.0302000.0290000.0284000.0300000.0300000.0300000.0000
Percentage of AmortizationOfFinancingCostsAndDiscounts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.0

us-gaap:CapitalExpendituresIncurredButNotYetPaid

us-gaap:CapitalExpendituresIncurredButNotYetPaid


Capital
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-312016-09-24
Value-172000.0862000.0-572000.0-692000.0-1043000.03370000.0748000.0-85000.065000.0873000.0288000.0145000.0-81000.0247000.0-334000.0246000.0292000.056000.0327000.0-13000.0
Percentage of CapitalExpendituresIncurredButNotYetPaid100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CapitalizedComputerSoftwareAmortization1

us-gaap:CapitalizedComputerSoftwareAmortization1


Capitalized
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-28
Value300000.0370000.0361000.0317000.0300000.0205000.0
Percentage of CapitalizedComputerSoftwareAmortization1100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeGainLossOnDerivativeNet us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation, us-gaap:IncomeStatementLocation

us-gaap:DerivativeGainLossOnDerivativeNet

us-gaap:ForeignExchangeForward, us-gaap:Nondesignated, us-gaap:ForeignCurrencyGainLoss


Derivative
Period End2021-06-262021-03-27
Value166000.0-1515000.0
Percentage of DerivativeGainLossOnDerivativeNet100.0100.0

us-gaap:DiscontinuedOperationGainLossFromDisposalOfDiscontinuedOperationBeforeIncomeTax

us-gaap:DiscontinuedOperationGainLossFromDisposalOfDiscontinuedOperationBeforeIncomeTax


Discontinued
Period End2020-12-262020-09-262020-06-272020-03-282019-06-292015-12-262015-09-262015-06-272014-12-272014-09-272014-06-28
Value00035000.00-341000.0-222000.0-3959000.0-4942000.0-2598000.02024000.0
Percentage of DiscontinuedOperationGainLossFromDisposalOfDiscontinuedOperationBeforeIncomeTax0.00.00.0100.00.0100.0100.0100.0100.0100.0100.0

us-gaap:DiscontinuedOperationIncomeLossFromDiscontinuedOperationBeforeIncomeTax

us-gaap:DiscontinuedOperationIncomeLossFromDiscontinuedOperationBeforeIncomeTax


Discontinued
Period End2020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-30
Value00046000.0-1008000.0173000.038000.0189000.0
Percentage of DiscontinuedOperationIncomeLossFromDiscontinuedOperationBeforeIncomeTax0.00.00.0100.0100.0100.0100.0100.0

us-gaap:DiscontinuedOperationTaxEffectOfDiscontinuedOperation

us-gaap:DiscontinuedOperationTaxEffectOfDiscontinuedOperation


Discontinued
Period End2020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302015-12-262015-09-262014-09-272014-06-28
Value0004000.031000.019000.014000.025000.000-105000.061000.0
Percentage of DiscontinuedOperationTaxEffectOfDiscontinuedOperation0.00.00.0100.0100.0100.0100.0100.00.00.0100.0100.0

us-gaap:DisposalGroupIncludingDiscontinuedOperationOperatingIncomeLoss

us-gaap:DisposalGroupIncludingDiscontinuedOperationOperatingIncomeLoss


Disposal
Period End2020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302015-12-262015-09-262015-06-272014-12-272014-09-272014-06-28
Value00011000.078000.0173000.038000.0189000.000-1049000.0-5243000.0-2598000.0-2224000.0
Percentage of DisposalGroupIncludingDiscontinuedOperationOperatingIncomeLoss0.00.00.0100.0100.0100.0100.0100.00.00.0100.0100.0100.0100.0

us-gaap:DisposalGroupIncludingDiscontinuedOperationRevenue

us-gaap:DisposalGroupIncludingDiscontinuedOperationRevenue


Disposal
Period End2020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302015-09-262015-06-272014-12-272014-09-272014-06-282013-12-282013-09-282013-06-29
Value0.00.00.00.4321.1161.721.7081.5920.02.3440.02.8681.9073.5353.9854.418
Percentage of DisposalGroupIncludingDiscontinuedOperationRevenue0.00.00.0100.0100.0100.0100.0100.00.0100.00.0100.0100.0100.0100.0100.0

us-gaap:DividendsCommonStockCash

us-gaap:DividendsCommonStockCash


Dividends
Period End2020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-31
Value0002486000.02483000.02469000.02464000.02450000.02443000.01733000.01732000.01781000.0
Percentage of DividendsCommonStockCash0.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DividendsCommonStockCash us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings


Dividends
Period End2020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-31
Value0002486000.02483000.02469000.02464000.02450000.02443000.01733000.01732000.01781000.0
Percentage of DividendsCommonStockCash0.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations

us-gaap:EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations


Effect
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-31
Value-651000.0882000.0992000.0583000.042000.0-1488000.0283000.0-1617000.0293000.0-488000.0-2036000.0-393000.0-2143000.0973000.0
Percentage of EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense

us-gaap:EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense


Employee
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-312016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-29
Value180000.0234000.0353000.0215000.0223000.0172000.0161000.067000.079000.0280000.0438000.0115000.0126000.0314000.0101000.0107000.0249000.075000.080000.076000.073000.040000.068000.070000.067000.044000.047000.060000.056000.041000.0
Percentage of EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ExtinguishmentOfDebtAmount us-gaap:DebtInstrument

us-gaap:ExtinguishmentOfDebtAmount

cohu:SecuredTermLoanFacility


Extinguishment
Period End2021-06-262021-03-27
Value0.0100
Percentage of ExtinguishmentOfDebtAmount0.0100.0

us-gaap:ExtinguishmentOfDebtAmount us-gaap:LongtermDebtType

cohu:TermLoanFacility


Extinguishment
Period End2020-08-31
Value16
Percentage of ExtinguishmentOfDebtAmount0.0

us-gaap:FinanceLeaseInterestExpense

us-gaap:FinanceLeaseInterestExpense


Finance
Period End2021-06-262020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-30
Value1000.00029000.028000.029000.029000.029000.059000.0
Percentage of FinanceLeaseInterestExpense100.00.00.0100.0100.0100.0100.0100.0100.0

us-gaap:FinanceLeaseInterestPaymentOnLiability

us-gaap:FinanceLeaseInterestPaymentOnLiability


Finance
Period End2020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-30
Value0029000.028000.08000.036000.036000.037000.0
Percentage of FinanceLeaseInterestPaymentOnLiability0.00.0100.0100.0100.0100.0100.0100.0

us-gaap:FinanceLeasePrincipalPayments

us-gaap:FinanceLeasePrincipalPayments


Finance
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-30
Value46000.045000.042000.036000.059000.09000.09000.08000.08000.09000.0
Percentage of FinanceLeasePrincipalPayments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FinanceLeaseRightOfUseAssetAmortization

us-gaap:FinanceLeaseRightOfUseAssetAmortization


Finance
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-30
Value24000.021000.019000.017000.028000.020000.020000.020000.021000.041000.0
Percentage of FinanceLeaseRightOfUseAssetAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ForeignCurrencyTransactionGainLossBeforeTax

us-gaap:ForeignCurrencyTransactionGainLossBeforeTax


Foreign
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-31
Value-25000.0-262000.0-642000.0-1484000.0-640000.0-404000.0-1259000.01630000.0-546000.0218000.0439000.0-232000.03031000.0-1579000.0
Percentage of ForeignCurrencyTransactionGainLossBeforeTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ForeignCurrencyTransactionGainLossRealized

us-gaap:ForeignCurrencyTransactionGainLossRealized


Foreign
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-312016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-27
Value0-300000.0-700000.0-1500000.0-600000.0-400000.01600000.0-500000.0200000.0500000.0-200000.03000000.0-1600000.05700000.0-200000.0-1200000.0-1300000.03600000.0-300000.0300000.0-500000.0300000.01500000.0-600000.0200000.01100000.01000000.0
Percentage of ForeignCurrencyTransactionGainLossRealized0.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:GainLossOnDispositionOfAssets1

us-gaap:GainLossOnDispositionOfAssets1


Gain
Period End2020-09-262020-06-272020-03-282019-09-282019-06-292019-03-30
Value4440000.0-24000.0-88000.0587000.0141000.0-378000.0
Percentage of GainLossOnDispositionOfAssets1100.0100.0100.0100.0100.0100.0

us-gaap:GainLossOnSaleOfBusiness

us-gaap:GainLossOnSaleOfBusiness


Gain
Period End2021-06-26
Value75
Percentage of GainLossOnSaleOfBusiness100.0

us-gaap:GainLossOnSaleOfBusiness us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations

us-gaap:DisposalGroupDisposedOfBySaleNotDiscontinuedOperations, cohu:PCBTestEquipment


Gain
Period End2021-06-24
Value75
Percentage of GainLossOnSaleOfBusiness0.0

us-gaap:GainLossOnSaleOfPropertyPlantEquipment

us-gaap:GainLossOnSaleOfPropertyPlantEquipment


Gain
Period End2020-12-262020-09-26
Value04468000.0
Percentage of GainLossOnSaleOfPropertyPlantEquipment0.0100.0

us-gaap:GainLossOnSaleOfPropertyPlantEquipment us-gaap:LongLivedAssetsHeldForSaleByAssetType

cohu:FacilityInRosenheimGermany


Gain
Period End2020-09-26
Value4500000.0
Percentage of GainLossOnSaleOfPropertyPlantEquipment100.7

us-gaap:GainLossOnSalesOfAssetsAndAssetImpairmentCharges

us-gaap:GainLossOnSalesOfAssetsAndAssetImpairmentCharges


Gain
Period End2021-06-262021-03-272020-06-272020-03-282018-12-292018-09-292017-12-302017-09-302016-12-312016-09-242016-06-252016-03-26
Value-10000.065000.0-24000.0-88000.0-264000.011000.020000.01000.06000.01000.0-6000.0-32000.0
Percentage of GainLossOnSalesOfAssetsAndAssetImpairmentCharges100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:GoodwillForeignCurrencyTranslationGainLoss

us-gaap:GoodwillForeignCurrencyTranslationGainLoss


Goodwill
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-312016-09-242016-06-252016-03-26
Value1.741-5.5697.9635.3910.953-0.6723.481-5.9991.498-2.857-1.715-0.186-2.0191.1710.6181.1241.2521.116-2.1790.275-0.0610.55
Percentage of GoodwillForeignCurrencyTranslationGainLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:GoodwillForeignCurrencyTranslationGainLoss us-gaap:ReportingUnit

cohu:PCBTest


Goodwill
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-28
Value0.779-0.460.9670.7360.08-0.097
Percentage of GoodwillForeignCurrencyTranslationGainLoss44.78.312.113.78.414.4

cohu:SemiconductorTestAndInspection


Goodwill
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-28
Value0.962-5.1096.9964.6550.873-0.575
Percentage of GoodwillForeignCurrencyTranslationGainLoss55.391.787.986.391.685.6

us-gaap:ImpairmentOfIntangibleAssetsIndefinitelivedExcludingGoodwill

us-gaap:ImpairmentOfIntangibleAssetsIndefinitelivedExcludingGoodwill


Impairment
Period End2020-12-262020-09-262020-06-272020-03-282019-06-29
Value0.07.30.03.9490.0
Percentage of ImpairmentOfIntangibleAssetsIndefinitelivedExcludingGoodwill0.0100.00.0100.00.0

us-gaap:ImpairmentOfIntangibleAssetsIndefinitelivedExcludingGoodwill us-gaap:IndefiniteLivedIntangibleAssetsByMajorClass

cohu:IndefiniteLivedInProcessResearchAndDevelopment


Impairment
Period End2020-09-262020-03-28
Value7.33.9
Percentage of ImpairmentOfIntangibleAssetsIndefinitelivedExcludingGoodwill100.098.8

us-gaap:IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity

us-gaap:IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity


Income
Period End2020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302017-12-302017-09-302017-06-242016-12-312016-09-24
Value00042000.0-1039000.0154000.024000.0164000.000-278000.0-217000.051000.0
Percentage of IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity0.00.00.0100.0100.0100.0100.0100.00.00.0100.0100.0100.0

us-gaap:IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare

us-gaap:IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare


Income
Period End2020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302017-12-302017-09-302017-06-242016-12-312016-09-242016-06-252015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282013-12-282013-09-282013-06-29
Value0000-0.01000.0100-0.01-0.0100-0.01-0.01-0.15-0.04-0.040.020.1200.010.01
Percentage of IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare0.00.00.00.0100.00.00.0100.00.00.0100.0100.00.00.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0

us-gaap:IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare

us-gaap:IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare


Income
Period End2020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302017-12-302017-09-302017-06-242016-12-312016-09-242016-06-252015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282013-12-282013-09-282013-06-29
Value0000-0.01000.0100-0.01-0.0100-0.02-0.01-0.15-0.04-0.040.020.1200.010.01
Percentage of IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare0.00.00.00.0100.00.00.0100.00.00.0100.0100.00.00.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0

us-gaap:IncreaseDecreaseInAccruedIncomeTaxesPayable

us-gaap:IncreaseDecreaseInAccruedIncomeTaxesPayable


Increase
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-312016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282013-06-292013-03-302012-12-292012-09-292012-06-302012-03-312011-12-312011-09-242011-06-252011-03-262010-12-252010-09-25
Value105.131-0.844-1.064-7.6357.454-6.9720.35-1.883-2.2140.1432.172.589-0.861-2.790.450.1320.690.4940.196-3.1340.487-2.6320.7110.5880.5050.0581.0280.2520.072-0.25-0.455-0.0410.902-1.634-0.780.3260.421-0.187-1.391-6.6161.7320.1720.542
Percentage of IncreaseDecreaseInAccruedIncomeTaxesPayable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInContractWithCustomerLiability

us-gaap:IncreaseDecreaseInContractWithCustomerLiability


Increase
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-30
Value-4.6580.8823.176-6.576-8.84614102.0240.056-0.6
Percentage of IncreaseDecreaseInContractWithCustomerLiability100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInOtherAccruedLiabilities

us-gaap:IncreaseDecreaseInOtherAccruedLiabilities


Increase
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-312016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-09-272014-06-282014-03-292013-09-282013-06-292013-03-302012-09-292012-06-302012-03-312011-09-242011-06-252011-03-26
Value6000.0-78000.0692000.0-310000.0-185000.0-106000.01349000.01306000.01104000.01589000.0607000.0-115000.0468000.0-762000.0552000.0119000.0173000.0135000.0-554000.0445000.0243000.028000.0-1497000.0556000.0851000.0217000.0-401000.0-88000.0133000.037000.0137000.0257000.059000.066000.033000.0127000.078000.02000.0
Percentage of IncreaseDecreaseInOtherAccruedLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInOtherCurrentAssets

us-gaap:IncreaseDecreaseInOtherCurrentAssets


Increase
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292015-09-262015-06-272015-03-282014-09-272014-06-282014-03-29
Value-4777000.06629000.01091000.0-2600000.0-5529000.05888000.0-1308000.0-1305000.04587000.04022000.0180000.0-2760000.0-1983000.0-230000.0-678000.0-913000.0-574000.01147000.0
Percentage of IncreaseDecreaseInOtherCurrentAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInOtherNoncurrentAssets

us-gaap:IncreaseDecreaseInOtherNoncurrentAssets


Increase
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-312016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-28
Value281000.0-62000.0-141000.01102000.0-436000.0-810000.0191000.01882000.01284000.0-313000.02294000.0345000.0587000.0-265000.0-929000.0-482000.0-523000.0433000.0-447000.02000.04000.026000.0-196000.0364000.080000.078000.0
Percentage of IncreaseDecreaseInOtherNoncurrentAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InvestmentIncomeInterestAndDividend

us-gaap:InvestmentIncomeInterestAndDividend


Investment
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-31
Value94000.050000.014000.042000.021000.0147000.0161000.0190000.0191000.0222000.0274000.0337000.0329000.0247000.0
Percentage of InvestmentIncomeInterestAndDividend100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LeaseCost

us-gaap:LeaseCost


Lease
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-30
Value2.6392.6272.5852.5982.7042.7182.7462.812.8562.83
Percentage of LeaseCost100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:NetIncomeLossIncludingPortionAttributableToNonredeemableNoncontrollingInterest

us-gaap:NetIncomeLossIncludingPortionAttributableToNonredeemableNoncontrollingInterest


Net
Period End2020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-31
Value14-6.646-4.74-17.276-17.32-10.326-19.359-22.687-56.9974.803118.122
Percentage of NetIncomeLossIncludingPortionAttributableToNonredeemableNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:NetIncomeLossIncludingPortionAttributableToNonredeemableNoncontrollingInterest us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings


Net
Period End2020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-31
Value14-6.646-4.74-17.276-17.32-10.326-19.359-22.687-56.9974.803118.122
Percentage of NetIncomeLossIncludingPortionAttributableToNonredeemableNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingLeaseCost

us-gaap:OperatingLeaseCost


Operating
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-30
Value2027000.02040000.02037000.02074000.02112000.02151000.02144000.02142000.02139000.02122000.0
Percentage of OperatingLeaseCost100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingLeasePayments

us-gaap:OperatingLeasePayments


Operating
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-30
Value2365000.01943000.01872000.02084000.01990000.02133000.01779000.01525000.01747000.01881000.0
Percentage of OperatingLeasePayments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent

us-gaap:OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent


Other
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-30
Value2.89-10.24614111.897-0.9297.332-13.2763.684-5.262
Percentage of OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome


Other
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-30
Value2.89-10.24614111.897-0.9297.328-13.2763.684-5.258
Percentage of OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent100.0100.0100.0100.0100.0100.099.9100.0100.099.9

us-gaap:OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationReclassificationAdjustmentFromAOCIRealizedUponSaleOrLiquidationNetOfTax

us-gaap:OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationReclassificationAdjustmentFromAOCIRealizedUponSaleOrLiquidationNetOfTax


Other
Period End2021-06-26
Value2515000.0
Percentage of OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationReclassificationAdjustmentFromAOCIRealizedUponSaleOrLiquidationNetOfTax100.0

us-gaap:OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationReclassificationAdjustmentFromAOCIRealizedUponSaleOrLiquidationNetOfTax us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome


Other
Period End2021-06-26
Value2515000.0
Percentage of OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationReclassificationAdjustmentFromAOCIRealizedUponSaleOrLiquidationNetOfTax100.0

us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent

us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent


Other
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-312016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282013-06-292013-03-302012-12-292012-09-292012-06-302012-03-312011-12-312011-09-242011-06-252011-03-26
Value0.518-10.43217111.897-0.9296.234-13.2413.645-4.784-4.682-0.49-6.6923.7710.2292.5883.33.978-8.7980.556-0.3562.488-1.271-4.1222.733-8.398-8.561-8.629-0.5040.3293.0074.651.157-3.9461.9542.178-4.9642.627-2.544-4.8210.6626.888
Percentage of OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax

us-gaap:OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax


Other
Period End2021-06-262021-03-272020-06-272019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-312016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282013-06-292013-03-302012-12-292012-09-292012-06-302012-03-312011-12-312011-09-24
Value-151000.0180000.001098000.0-35000.039000.0-474000.0-788000.024000.0-114000.073000.01132000.0-12000.059000.069000.0281000.02000.015000.018000.025000.0-99000.077000.055000.03086000.092000.0124000.0-44000.0-1496000.0-18000.0-31000.0-59000.0-13000.0-33000.0-44000.0-32000.0-1202000.0-47000.0
Percentage of OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome


Other
Period End2021-06-262021-03-272019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-31
Value-151000.0180000.01098000.0-35000.039000.0-474000.0-788000.024000.0-114000.073000.0
Percentage of OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax

us-gaap:OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax


Other
Period End2021-06-262021-03-272018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-312016-09-242016-06-252016-03-262013-12-282013-09-282013-06-292013-03-302012-12-292012-09-292012-06-302012-03-312011-12-312011-09-242011-06-252011-03-26
Value-8000.0-6000.009000.08000.0-10000.0-9000.06000.001000.0-4000.0-3000.01000.01000.04000.0-3000.0-4000.0-3000.0-28000.013000.0-13000.012000.0-28000.0-14000.028000.08000.0
Percentage of OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax100.0100.00.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome


Other
Period End2021-06-262021-03-272018-12-292018-09-292018-06-302018-03-31
Value-8000.0-6000.009000.08000.0-10000.0
Percentage of OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax100.0100.00.0100.0100.0100.0

us-gaap:PaymentsForRestructuring us-gaap:RestructuringCostAndReserve, us-gaap:RestructuringPlan

us-gaap:PaymentsForRestructuring

cohu:EmployeeSeveranceAndOtherExitCosts, cohu:IntegrationProgram


Payments
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-30
Value3.3212.8320.5640.7980.4441.3876.4194.024.1471.637
Percentage of PaymentsForRestructuring100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EmployeeSeverance, cohu:IntegrationProgram


Payments
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-30
Value2.8772.4440.5390.070.2281.2185.6583.9614.2611.029
Percentage of PaymentsForRestructuring86.686.395.68.851.487.888.198.5102.762.9

us-gaap:OtherRestructuring, cohu:IntegrationProgram


Payments
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-30
Value0.4440.3880.0250.7280.2160.1690.7610.059-0.1140.608
Percentage of PaymentsForRestructuring13.413.74.491.248.612.211.91.5-2.737.1

us-gaap:PaymentsToAcquireShortTermInvestments

us-gaap:PaymentsToAcquireShortTermInvestments


Payments
Period End2021-06-262021-03-272018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-312016-09-242016-06-252016-03-262015-12-262015-09-26
Value6.791290.0118.57318133.188128.0819165.6638.8910.2030.0
Percentage of PaymentsToAcquireShortTermInvestments100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

us-gaap:PensionAndOtherPostretirementBenefitExpense

us-gaap:PensionAndOtherPostretirementBenefitExpense


Pension
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-30
Value126000.0-81000.0918000.0305000.0198000.0254000.0736000.0-162000.0251000.0192000.0
Percentage of PensionAndOtherPostretirementBenefitExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromConstructionLoansPayable

us-gaap:ProceedsFromConstructionLoansPayable


Proceeds
Period End2021-06-262021-03-272020-06-272020-03-28
Value0818000.03228000.01117000.0
Percentage of ProceedsFromConstructionLoansPayable0.0100.0100.0100.0

us-gaap:ProceedsFromDivestitureOfBusinessesNetOfCashDivested

us-gaap:ProceedsFromDivestitureOfBusinessesNetOfCashDivested


Proceeds
Period End2020-12-262020-09-262020-06-272020-03-28
Value0.00.00.02.975
Percentage of ProceedsFromDivestitureOfBusinessesNetOfCashDivested0.00.00.0100.0

us-gaap:ProceedsFromIssuanceOfCommonStock

us-gaap:ProceedsFromIssuanceOfCommonStock


Proceeds
Period End2021-06-262021-03-27
Value0.001223
Percentage of ProceedsFromIssuanceOfCommonStock100.0100.0

us-gaap:ProceedsFromIssuanceOfCommonStock us-gaap:SubsidiarySaleOfStock

cohu:UnderwrittenPublicOffering


Proceeds
Period End2021-03-11
Value223
Percentage of ProceedsFromIssuanceOfCommonStock0.0

us-gaap:ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities

us-gaap:ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities


Proceeds
Period End2021-06-262021-03-272018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-312016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282013-06-292013-03-302012-12-292012-09-292012-06-302012-03-312011-12-312011-09-242011-06-252011-03-262010-12-252010-09-25
Value742.481-0.011349.302158.3568.65812176.5766.6636.0240.9670.00.00.110.0451.0-0.9550.8750.1255.4090.180.5190.1132718211825161815153.885
Percentage of ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromSalesOfAssetsInvestingActivities

us-gaap:ProceedsFromSalesOfAssetsInvestingActivities


Proceeds
Period End2021-06-262021-03-272020-09-262020-06-272020-03-282019-09-282019-06-292019-03-302018-09-292018-06-302018-03-312017-09-302016-09-242016-06-252016-03-26
Value0.0080.098142.4510.0740.7080.8060.0050.021-0.0160.020.00.0390.00.813
Percentage of ProceedsFromSalesOfAssetsInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.00.0100.0

us-gaap:ProceedsFromSalesOfBusinessAffiliateAndProductiveAssets us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations

us-gaap:ProceedsFromSalesOfBusinessAffiliateAndProductiveAssets

us-gaap:DisposalGroupDisposedOfBySaleNotDiscontinuedOperations, cohu:PCBTestEquipment


Proceeds
Period End2021-06-24
Value125
Percentage of ProceedsFromSalesOfBusinessAffiliateAndProductiveAssets100.0

us-gaap:ProductWarrantyAccrualPayments

us-gaap:ProductWarrantyAccrualPayments


Product
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-312017-03-252016-12-312016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282013-06-292013-03-302012-12-292012-09-292012-06-302012-03-312011-12-312011-09-242011-06-25
Value1895000.01653000.01683000.01169000.01316000.01778000.01782000.02071000.02066000.02654000.03124000.01946000.01774000.01515000.01487000.01773000.01865000.01191000.01191000.02189000.01401000.01546000.01488000.01973000.01905000.02067000.01891000.01332000.01252000.01371000.01549000.02399000.01402000.01457000.01409000.01303000.01540000.01741000.01739000.02434000.02383000.02401000.0
Percentage of ProductWarrantyAccrualPayments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProductWarrantyAccrualWarrantiesIssued

us-gaap:ProductWarrantyAccrualWarrantiesIssued


Product
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-312017-03-252016-12-312016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282013-06-292013-03-302012-12-292012-09-292012-06-302012-03-312011-12-312011-09-242011-06-25
Value3.2432.4092.3270.9111.0441.8912.0191.1371.831.7282.1661.61.8061.5821.3191.721.991.7361.7361.5021.321.4461.821.6851.8671.9281.4392.5531.6331.1371.2112.5450.6971.9210.240.3951.0061.1481.6652.9512.5872.178
Percentage of ProductWarrantyAccrualWarrantiesIssued100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RestructuringCharges

us-gaap:RestructuringCharges


Restructuring
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292014-06-28
Value0.6171.346.2230.4120.5850.4032.7640.8148.5451.361180.427
Percentage of RestructuringCharges100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RestructuringCharges us-gaap:RestructuringCostAndReserve, us-gaap:RestructuringPlan

cohu:EmployeeSeveranceAndOtherExitCosts, cohu:IntegrationProgram


Restructuring
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-30
Value0.6171.346.2230.4120.5850.4032.7640.8148.5451.361
Percentage of RestructuringCharges100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EmployeeSeverance, cohu:IntegrationProgram


Restructuring
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-30
Value0.1730.9526.1980.0530.00.2342.0030.7558.6590.753
Percentage of RestructuringCharges28.071.099.612.90.058.172.592.8101.355.3

us-gaap:OtherRestructuring, cohu:IntegrationProgram


Restructuring
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-30
Value0.4440.3880.0250.3590.5850.1690.7610.059-0.1140.608
Percentage of RestructuringCharges72.029.00.487.1100.041.927.57.2-1.344.7

us-gaap:RestructuringCharges us-gaap:RestructuringPlan

cohu:IntegrationProgram


Restructuring
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-30
Value0.41.710.0-1.30.72.05.4930.8148.5451.361
Percentage of RestructuringCharges64.8126.9160.7-315.5119.7496.3198.7100.0100.0100.0

us-gaap:RestructuringReserveTranslationAndOtherAdjustment us-gaap:RestructuringCostAndReserve, us-gaap:RestructuringPlan

us-gaap:RestructuringReserveTranslationAndOtherAdjustment

cohu:EmployeeSeveranceAndOtherExitCosts, cohu:IntegrationProgram


Restructuring
Period End2021-06-262021-03-272020-06-272020-03-282019-12-282019-09-282019-06-292019-03-30
Value76000.0-140000.016000.0-33000.086000.0-163000.022000.04000.0
Percentage of RestructuringReserveTranslationAndOtherAdjustment100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EmployeeSeverance, cohu:IntegrationProgram


Restructuring
Period End2021-06-262021-03-272020-06-272020-03-282019-12-282019-09-282019-06-292019-03-30
Value76000.0-140000.016000.0-33000.086000.0-163000.022000.04000.0
Percentage of RestructuringReserveTranslationAndOtherAdjustment100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability

us-gaap:RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability


Right
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-28
Value054000.021000.0108000.0-13000.0373000.0
Percentage of RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability0.0100.0100.0100.0100.0100.0

us-gaap:RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability

us-gaap:RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability


Right
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-30
Value0.4772.350.5730.2540.5141.0621.0291.3286.97931
Percentage of RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage us-gaap:AwardType, us-gaap:Vesting

us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage

cohu:EquityBasedPerformanceStockUnitsGrantedIn202020192018And2017, cohu:VestOnTheThirdAnniversaryOfAwardsGrant


Sharebased
Period End2021-06-262021-03-272020-12-26
Value0100.00
Percentage of SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage0.0100.00.0

us-gaap:ShortTermLeaseCost

us-gaap:ShortTermLeaseCost


Short
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-30
Value34000.033000.040000.015000.019000.019000.032000.080000.066000.078000.0
Percentage of ShortTermLeaseCost100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StockIssuedDuringPeriodValueEmployeeStockPurchasePlan

us-gaap:StockIssuedDuringPeriodValueEmployeeStockPurchasePlan


Stock
Period End2021-06-262020-12-262020-09-262020-06-272019-12-282019-09-282019-06-292018-12-292018-09-292018-06-30
Value1749000.01667000.001602000.01539000.00807000.0761000.00762000.0
Percentage of StockIssuedDuringPeriodValueEmployeeStockPurchasePlan100.0100.00.0100.0100.00.0100.0100.00.0100.0

us-gaap:StockIssuedDuringPeriodValueEmployeeStockPurchasePlan us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Stock
Period End2021-06-262020-12-262020-09-262020-06-272019-12-282019-09-282019-06-292018-12-292018-09-292018-06-30
Value1654000.01538000.001488000.01416000.00743000.0717000.00721000.0
Percentage of StockIssuedDuringPeriodValueEmployeeStockPurchasePlan94.692.30.092.992.00.092.194.20.094.6

us-gaap:CommonStock


Stock
Period End2021-06-262020-12-262020-09-262020-06-272019-12-282019-09-282019-06-292018-12-292018-09-292018-06-30
Value95000.0129000.00114000.0123000.0064000.044000.0041000.0
Percentage of StockIssuedDuringPeriodValueEmployeeStockPurchasePlan5.47.70.07.18.00.07.95.80.05.4

us-gaap:StockIssuedDuringPeriodValueRestrictedStockAwardGross us-gaap:StatementEquityComponents

us-gaap:StockIssuedDuringPeriodValueRestrictedStockAwardGross

us-gaap:AdditionalPaidInCapital


Stock
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-31
Value-94000.0-526000.0-46000.0-127000.0-84000.0-403000.0-2000.0-203000.0-29000.0-365000.0-68000.0-5000.0-20000.0-448000.0
Percentage of StockIssuedDuringPeriodValueRestrictedStockAwardGross100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CommonStock


Stock
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-31
Value94000.0526000.046000.0127000.084000.0403000.02000.0203000.029000.0365000.068000.05000.020000.0448000.0
Percentage of StockIssuedDuringPeriodValueRestrictedStockAwardGross-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0-100.0

us-gaap:StockIssuedDuringPeriodValueStockOptionsExercised

us-gaap:StockIssuedDuringPeriodValueStockOptionsExercised


Stock
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-31
Value0.2371.9220.7270.0860.00.2890.0790.2080.0440.0780.040.1260.3110.203
Percentage of StockIssuedDuringPeriodValueStockOptionsExercised100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StockIssuedDuringPeriodValueStockOptionsExercised us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Stock
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-31
Value0.2151.730.6540.080.00.2670.0740.1860.0390.0680.0380.1110.280.184
Percentage of StockIssuedDuringPeriodValueStockOptionsExercised90.790.090.093.00.092.493.789.488.687.295.088.190.090.6

us-gaap:CommonStock


Stock
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-31
Value0.0220.1920.0730.0060.00.0220.0050.0220.0050.010.0020.0150.0310.019
Percentage of StockIssuedDuringPeriodValueStockOptionsExercised9.310.010.07.00.07.66.310.611.412.85.011.910.09.4

us-gaap:StockRepurchasedAndRetiredDuringPeriodValue

us-gaap:StockRepurchasedAndRetiredDuringPeriodValue


Stock
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-31
Value977000.08553000.0541000.0580000.0288000.01397000.013000.0730000.0200000.0-1828000.0-15555000.041000.0134000.0-3780000.0
Percentage of StockRepurchasedAndRetiredDuringPeriodValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StockRepurchasedAndRetiredDuringPeriodValue us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Stock
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-31
Value951000.08363000.0521000.0547000.0266000.01263000.013000.0670000.0187000.0-1705000.0-15193000.039000.0129000.0-3620000.0
Percentage of StockRepurchasedAndRetiredDuringPeriodValue97.397.896.394.392.490.4100.091.893.593.397.795.196.395.8

us-gaap:CommonStock


Stock
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-31
Value26000.0190000.020000.033000.022000.0134000.0060000.013000.0-123000.0-362000.02000.05000.0-160000.0
Percentage of StockRepurchasedAndRetiredDuringPeriodValue2.72.23.75.77.69.60.08.26.56.72.34.93.74.2

us-gaap:SubleaseIncome

us-gaap:SubleaseIncome


Sublease
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-30
Value21000.019000.019000.031000.031000.032000.032000.031000.034000.036000.0
Percentage of SubleaseIncome100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:UnrecognizedTaxBenefitsPeriodIncreaseDecrease

us-gaap:UnrecognizedTaxBenefitsPeriodIncreaseDecrease


Unrecognized
Period End2020-09-262020-06-272020-03-282019-09-282019-06-292019-03-302018-09-292018-06-302018-03-312017-09-302017-06-242017-03-252014-09-272014-06-28
Value1000000.0-200000.0-200000.000000000000
Percentage of UnrecognizedTaxBenefitsPeriodIncreaseDecrease100.0100.0100.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:VariableLeaseCost

us-gaap:VariableLeaseCost


Variable
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-30
Value574000.0552000.0508000.0523000.0547000.0532000.0553000.0570000.0635000.0566000.0
Percentage of VariableLeaseCost100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:WeightedAverageNumberDilutedSharesOutstandingAdjustment

us-gaap:WeightedAverageNumberDilutedSharesOutstandingAdjustment


Weighted
Period End2021-06-262021-03-272020-06-272019-06-292018-09-292018-06-302018-03-312017-09-302017-06-242017-03-252016-09-242016-06-252015-09-262015-06-272015-03-282014-09-272014-06-282014-03-292011-09-242011-06-25
Value919000.01726000.000822000.0758000.0929000.0950000.01017000.01274000.0606000.0647000.0621000.0663000.00693000.0473000.00320000.0381000.0
Percentage of WeightedAverageNumberDilutedSharesOutstandingAdjustment100.0100.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.00.0100.0100.0

cohu:AvailableForSaleSecuritiesDebtMaturitiesDueAfterOneYearThroughThreeYearsEstimatedFairValue

cohu:AvailableForSaleSecuritiesDebtMaturitiesDueAfterOneYearThroughThreeYearsEstimatedFairValue


Available
Period End2021-06-262021-03-272020-06-272019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-30
Value954000.0960000.00904000.0573000.0581000.0565000.0560000.0549000.0556000.0
Percentage of AvailableForSaleSecuritiesDebtMaturitiesDueAfterOneYearThroughThreeYearsEstimatedFairValue100.0100.00.0100.0100.0100.0100.0100.0100.0100.0

cohu:AvailableforsaleSecuritiesDebtMaturitiesYearTwoThroughThreeAmortizedCostBasis

cohu:AvailableforsaleSecuritiesDebtMaturitiesYearTwoThroughThreeAmortizedCostBasis


Availableforsale
Period End2021-06-262021-03-272020-06-272019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302017-06-242017-03-252016-12-312015-12-26
Value954000.0960000.00904000.0573000.0581000.0565000.0560000.0549000.0556000.0616000.0615000.0623000.0202000.0
Percentage of AvailableforsaleSecuritiesDebtMaturitiesYearTwoThroughThreeAmortizedCostBasis100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

cohu:DebtLongtermAndShorttermCombinedAmountGross

cohu:DebtLongtermAndShorttermCombinedAmountGross


Debt
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292017-12-30
Value2202233253453623603603593563573588.963
Percentage of DebtLongtermAndShorttermCombinedAmountGross100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

cohu:DeferredProfit

cohu:DeferredProfit


Deferred
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-312016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282013-06-292013-03-302012-12-292012-09-292012-06-302011-12-31
Value17128.671119.6149.3137.6457.9528.1638.2686.8961.8941.7092.9146.6086.7216.3474.7956.8865.7266.8765.5643.735.7327.6487.7237.445118.8586.3316.0665.4826.9495.5612.1391.8024.1592.821
Percentage of DeferredProfit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

cohu:DeferredProfitLongterm

cohu:DeferredProfitLongterm


Deferred
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-28
Value6400000.06500000.06700000.06800000.06900000.07100000.07200000.0
Percentage of DeferredProfitLongterm100.0100.0100.0100.0100.0100.0100.0

cohu:DeferredTaxAssetsInventoryAndWarrantyReserves

cohu:DeferredTaxAssetsInventoryAndWarrantyReserves


Deferred
Period End2020-12-262019-12-282018-12-292017-12-302016-12-312015-12-262014-12-272013-12-282012-12-292011-12-31
Value1111123.4175.8688.2079.585131112
Percentage of DeferredTaxAssetsInventoryAndWarrantyReserves100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

cohu:DeferredTaxAssetsLeaseLiabilities

cohu:DeferredTaxAssetsLeaseLiabilities


Deferred
Period End2020-12-262019-12-28
Value5146000.07890000.0
Percentage of DeferredTaxAssetsLeaseLiabilities100.0100.0

cohu:DeferredTaxLiabilitiesAssetBasisDifferences

cohu:DeferredTaxLiabilitiesAssetBasisDifferences


Deferred
Period End2020-12-262019-12-282018-12-292017-12-302016-12-312015-12-262014-12-272013-12-282012-12-292011-12-31
Value5262705.5187.4238.90410139.349.591
Percentage of DeferredTaxLiabilitiesAssetBasisDifferences100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

cohu:DeferredTaxLiabilitiesOperatingLeaseRightofuseAssets

cohu:DeferredTaxLiabilitiesOperatingLeaseRightofuseAssets


Deferred
Period End2020-12-262019-12-28
Value4706000.07504000.0
Percentage of DeferredTaxLiabilitiesOperatingLeaseRightofuseAssets100.0100.0

cohu:DefinedBenefitPlanExpectedFutureEmployeeAndEmployerContributionsNextTwelveMonths us-gaap:RetirementPlanName

cohu:DefinedBenefitPlanExpectedFutureEmployeeAndEmployerContributionsNextTwelveMonths

cohu:SwissPlan


Defined
Period End2020-12-26
Value900000.0
Percentage of DefinedBenefitPlanExpectedFutureEmployeeAndEmployerContributionsNextTwelveMonths100.0

cohu:DefinedBenefitPlanHealthCareCostTrendRateAnnualRateOfChange us-gaap:RetirementPlanType

cohu:DefinedBenefitPlanHealthCareCostTrendRateAnnualRateOfChange

us-gaap:DefinedBenefitPostretirementHealthCoverage


Defined
Period End2020-12-26
Value-0.27
Percentage of DefinedBenefitPlanHealthCareCostTrendRateAnnualRateOfChange100.0

cohu:FinanceLeaseLiabilityToBePaidAfterYearFour

cohu:FinanceLeaseLiabilityToBePaidAfterYearFour


Finance
Period End2021-06-262021-03-27
Value4000.02000.0
Percentage of FinanceLeaseLiabilityToBePaidAfterYearFour100.0100.0

cohu:LeaseLiability

cohu:LeaseLiability


Lease
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-28
Value28313131353636
Percentage of LeaseLiability100.0100.0100.0100.0100.0100.0100.0

cohu:LeaseLiabilityNoncurrent

cohu:LeaseLiabilityNoncurrent


Lease
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-28
Value23262526272828
Percentage of LeaseLiabilityNoncurrent100.0100.0100.0100.0100.0100.0100.0

cohu:LeaseRightofuseAsset

cohu:LeaseRightofuseAsset


Lease
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-28
Value27302930343535
Percentage of LeaseRightofuseAsset100.0100.0100.0100.0100.0100.0100.0

cohu:LesseeLeaseLiabilityPaymentsDue

cohu:LesseeLeaseLiabilityPaymentsDue


Lessee
Period End2021-06-262021-03-272020-12-262020-09-26
Value36404040
Percentage of LesseeLeaseLiabilityPaymentsDue100.0100.0100.0100.0

cohu:LesseeLeaseLiabilityPaymentsDueAfterYearFive

cohu:LesseeLeaseLiabilityPaymentsDueAfterYearFive


Lessee
Period End2020-12-26
Value11
Percentage of LesseeLeaseLiabilityPaymentsDueAfterYearFive100.0

cohu:LesseeLeaseLiabilityPaymentsDueAfterYearFour

cohu:LesseeLeaseLiabilityPaymentsDueAfterYearFour


Lessee
Period End2021-06-262021-03-272020-09-26
Value121216
Percentage of LesseeLeaseLiabilityPaymentsDueAfterYearFour100.0100.0100.0

cohu:LesseeLeaseLiabilityPaymentsDueNextTwelveMonths

cohu:LesseeLeaseLiabilityPaymentsDueNextTwelveMonths


Lessee
Period End2021-06-262021-03-272020-12-262020-09-26
Value6306000.06926000.07194000.06897000.0
Percentage of LesseeLeaseLiabilityPaymentsDueNextTwelveMonths100.0100.0100.0100.0

cohu:LesseeLeaseLiabilityPaymentsDueYearFive

cohu:LesseeLeaseLiabilityPaymentsDueYearFive


Lessee
Period End2020-12-26
Value4428000.0
Percentage of LesseeLeaseLiabilityPaymentsDueYearFive100.0

cohu:LesseeLeaseLiabilityPaymentsDueYearFour

cohu:LesseeLeaseLiabilityPaymentsDueYearFour


Lessee
Period End2021-06-262021-03-272020-12-262020-09-26
Value4834000.04831000.04766000.04750000.0
Percentage of LesseeLeaseLiabilityPaymentsDueYearFour100.0100.0100.0100.0

cohu:LesseeLeaseLiabilityPaymentsDueYearThree

cohu:LesseeLeaseLiabilityPaymentsDueYearThree


Lessee
Period End2021-06-262021-03-272020-12-262020-09-26
Value4909000.05150000.05340000.05192000.0
Percentage of LesseeLeaseLiabilityPaymentsDueYearThree100.0100.0100.0100.0

cohu:LesseeLeaseLiabilityPaymentsDueYearTwo

cohu:LesseeLeaseLiabilityPaymentsDueYearTwo


Lessee
Period End2021-06-262021-03-272020-12-262020-09-26
Value5229000.05822000.06366000.06096000.0
Percentage of LesseeLeaseLiabilityPaymentsDueYearTwo100.0100.0100.0100.0

cohu:LesseeLeaseLiabilityPaymentsRemainderOfFiscalYear

cohu:LesseeLeaseLiabilityPaymentsRemainderOfFiscalYear


Lessee
Period End2021-06-262021-03-272020-09-26
Value3293000.05573000.01750000.0
Percentage of LesseeLeaseLiabilityPaymentsRemainderOfFiscalYear100.0100.0100.0

cohu:LesseeLeaseLiabilityUndiscountedExcessAmount

cohu:LesseeLeaseLiabilityUndiscountedExcessAmount


Lessee
Period End2021-06-262021-03-272020-12-262020-09-26
Value7962000.08562000.08783000.09185000.0
Percentage of LesseeLeaseLiabilityUndiscountedExcessAmount100.0100.0100.0100.0

cohu:LesseeOperatingLeaseLiabilityToBePaidAfterYearFour

cohu:LesseeOperatingLeaseLiabilityToBePaidAfterYearFour


Lessee
Period End2021-06-262021-03-272020-09-26
Value121216
Percentage of LesseeOperatingLeaseLiabilityToBePaidAfterYearFour100.0100.0100.0

cohu:LesseeSubleaseIncomeReceivableYearTwo

cohu:LesseeSubleaseIncomeReceivableYearTwo


Lessee
Period End2020-09-26
Value100000.0
Percentage of LesseeSubleaseIncomeReceivableYearTwo100.0

cohu:PercentageOfFairValueToDeterminePriceOfCommonStock us-gaap:PlanName

cohu:PercentageOfFairValueToDeterminePriceOfCommonStock

cohu:EmployeeStockPurchasePlan


Percentage
Period End2021-06-262021-03-272020-12-262020-09-262019-12-282018-12-292017-12-302015-12-262015-05-12
Value85.085.085.085.00.850.850.850.850.85
Percentage of PercentageOfFairValueToDeterminePriceOfCommonStock100.0100.0100.0100.0100.0100.0100.0100.0100.0

cohu:ShareBasedCompensationArrangementByShareBasedPaymentAwardPercentageOfSharesAvailableForIssue us-gaap:Range, us-gaap:AwardType

cohu:ShareBasedCompensationArrangementByShareBasedPaymentAwardPercentageOfSharesAvailableForIssue

srt:Maximum, us-gaap:PerformanceShares


Share
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-09-282019-06-292019-03-302018-09-292018-06-302018-03-31
Value200.0200.0200.0200.02.02.02.02.02.02.02.02.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardPercentageOfSharesAvailableForIssue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

srt:Minimum, us-gaap:PerformanceShares


Share
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-09-282019-06-292019-03-302018-09-292018-06-302018-03-31
Value025.025.025.00.250.250.250.250.250.250.250.25
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardPercentageOfSharesAvailableForIssue0.012.512.512.512.512.512.512.512.512.512.512.5

us-gaap:AccountsAndOtherReceivablesNetCurrent

us-gaap:AccountsAndOtherReceivablesNetCurrent


Accounts
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-312016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282013-06-292013-03-302012-12-292012-09-292012-06-302012-03-312011-12-312011-09-242011-06-252010-12-25
Value21619615111612211112712613413114978918571769082635662655956696773866966605860563643423641505366
Percentage of AccountsAndOtherReceivablesNetCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AccruedIncomeTaxesNoncurrent

us-gaap:AccruedIncomeTaxesNoncurrent


Accrued
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-312016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282012-12-29
Value6902000.07866000.06888000.06966000.06814000.08203000.08438000.09459000.09591000.09847000.09711000.06293000.06297000.06435000.06270000.06600000.07280000.07149000.06375000.06807000.06832000.07193000.06761000.06542000.07046000.07125000.07321000.07289000.07567000.07488000.07463000.02118000.0
Percentage of AccruedIncomeTaxesNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax

us-gaap:AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax


Accumulated
Period End2020-12-262019-12-282018-12-292017-12-302016-12-312015-12-262014-12-272013-12-282012-12-29
Value1449000.03832000.03204000.04009000.02761000.02445000.02387000.0-871000.0733000.0
Percentage of AccumulatedOtherComprehensiveIncomeLossDefinedBenefitPensionAndOtherPostretirementPlansNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AccumulatedOtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentNetOfTax

us-gaap:AccumulatedOtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentNetOfTax


Accumulated
Period End2020-12-262019-12-282018-12-292017-12-302016-12-312015-12-262014-12-272013-12-282012-12-29
Value-2877000.0-30198000.0-22676000.0-13771000.0-25116000.0-19327000.0-8327000.05780000.02510000.0
Percentage of AccumulatedOtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AllowanceForDoubtfulAccountsReceivable

us-gaap:AllowanceForDoubtfulAccountsReceivable


Allowance
Period End2021-06-262021-03-272020-12-26
Value400000.0400000.0100000.0
Percentage of AllowanceForDoubtfulAccountsReceivable100.0100.0100.0

us-gaap:AssetsFairValueDisclosure us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency

us-gaap:AssetsFairValueDisclosure

us-gaap:FairValueInputsLevel1, us-gaap:FairValueMeasurementsRecurring


Assets
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-312015-12-26
Value34611512814411216314713213013914414199841009873577073
Percentage of AssetsFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring


Assets
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-312015-12-26
Value871754126518.5958.57513132020305154543940485743
Percentage of AssetsFairValueDisclosure25.4151.731.918.145.45.25.810.310.414.614.021.451.864.854.340.255.083.882.258.7

us-gaap:AssetsFairValueDisclosure us-gaap:FairValueByMeasurementFrequency

us-gaap:FairValueMeasurementsRecurring


Assets
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-312015-12-26
Value434291170170163172156145143160165171150139155138114106128117
Percentage of AssetsFairValueDisclosure125.4251.7131.9118.1145.4105.2105.8110.3110.4114.6114.0121.4151.8164.8154.3140.2155.0183.8182.2158.7

us-gaap:AssetsOfDisposalGroupIncludingDiscontinuedOperation us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations

us-gaap:AssetsOfDisposalGroupIncludingDiscontinuedOperation

us-gaap:DisposalGroupDisposedOfBySaleNotDiscontinuedOperations, cohu:PCBTestEquipment


Assets
Period End2021-06-24
Value43
Percentage of AssetsOfDisposalGroupIncludingDiscontinuedOperation100.0

us-gaap:AvailableForSaleSecurities us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency, us-gaap:InvestmentType

us-gaap:AvailableForSaleSecurities

us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring, us-gaap:CertificatesOfDeposit


Available
Period End2021-06-262021-03-272020-12-262018-06-302018-03-312017-09-302017-06-242017-03-252016-12-312015-12-26
Value1.5510.750.753.7492.7981.2981.2940.7510.7511.002
Percentage of AvailableForSaleSecurities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring, us-gaap:CorporateDebtSecurities


Available
Period End2021-06-262021-03-272020-12-262018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-31
Value701361519252219182024
Percentage of AvailableForSaleSecurities4559.718187.32092.5511.5905.30.01489.11406.62729.73210.1

us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring, us-gaap:ForeignGovernmentDebtSecurities


Available
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-312015-12-26
Value0.9540.960.9650.9490.920.9010.9040.5730.5810.5650.560.5490.5560.5950.6190.6030.6160.6150.6230.65
Percentage of AvailableForSaleSecurities61.5128.0128.70.00.00.00.00.00.00.00.00.014.821.30.046.547.681.983.064.9

us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring, us-gaap:USGovernmentSponsoredEnterprisesDebtSecurities


Available
Period End2021-06-262021-03-272020-12-262018-06-302018-03-312017-12-302017-06-242017-03-252016-12-31
Value2.02.01.9980.9940.9921.4961.08.6988.108
Percentage of AvailableForSaleSecurities128.9266.7266.426.535.50.077.31158.21079.6

us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring, us-gaap:USTreasurySecurities


Available
Period End2021-06-262021-03-272020-12-262018-06-302018-03-312017-12-302017-09-302017-06-24
Value4.9677.8112.0127.7219.9048.4314.5965.196
Percentage of AvailableForSaleSecurities320.21041.5268.3205.9354.00.0354.1401.5

us-gaap:AvailableForSaleSecurities us-gaap:FairValueByMeasurementFrequency, us-gaap:InvestmentType

us-gaap:FairValueMeasurementsRecurring, us-gaap:CertificatesOfDeposit


Available
Period End2021-06-262021-03-272020-12-262018-06-302018-03-312017-09-302017-06-242017-03-252016-12-312015-12-26
Value1.5510.750.753.7492.7981.2981.2940.7510.7511.002
Percentage of AvailableForSaleSecurities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueMeasurementsRecurring, us-gaap:CorporateDebtSecurities


Available
Period End2021-06-262021-03-272020-12-262018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-31
Value701361519252219182024
Percentage of AvailableForSaleSecurities4559.718187.32092.5511.5905.30.01489.11406.62729.73210.1

us-gaap:FairValueMeasurementsRecurring, us-gaap:ForeignGovernmentDebtSecurities


Available
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-312015-12-26
Value0.9540.960.9650.9490.920.9010.9040.5730.5810.5650.560.5490.5560.5950.6190.6030.6160.6150.6230.65
Percentage of AvailableForSaleSecurities61.5128.0128.70.00.00.00.00.00.00.00.00.014.821.30.046.547.681.983.064.9

us-gaap:FairValueMeasurementsRecurring, us-gaap:USGovernmentSponsoredEnterprisesDebtSecurities


Available
Period End2021-06-262021-03-272020-12-262018-06-302018-03-312017-12-302017-06-242017-03-252016-12-31
Value2.02.01.9980.9940.9921.4961.08.6988.108
Percentage of AvailableForSaleSecurities128.9266.7266.426.535.50.077.31158.21079.6

us-gaap:FairValueMeasurementsRecurring, us-gaap:USTreasurySecurities


Available
Period End2021-06-262021-03-272020-12-262018-06-302018-03-312017-12-302017-09-302017-06-24
Value4.9677.8112.0127.7219.9048.4314.5965.196
Percentage of AvailableForSaleSecurities320.21041.5268.3205.9354.00.0354.1401.5

us-gaap:AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax

us-gaap:AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax


Available
Period End2021-06-262021-03-272020-12-262018-06-302017-12-302017-09-302017-06-242017-03-252016-12-312016-09-242016-03-26
Value16000.017000.02000.01000.01000.01000.01000.02000.02000.03000.01000.0
Percentage of AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax us-gaap:InvestmentType

us-gaap:CorporateDebtSecurities


Available
Period End2021-06-262021-03-272020-12-262018-06-302017-12-302017-09-302017-06-242017-03-252016-12-312016-03-26
Value15000.016000.02000.01000.01000.01000.01000.01000.01000.01000.0
Percentage of AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax93.894.1100.0100.0100.0100.0100.050.050.0100.0

us-gaap:USGovernmentSponsoredEnterprisesDebtSecurities


Available
Period End2021-03-272016-09-24
Value1000.02000.0
Percentage of AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax5.966.7

us-gaap:AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax

us-gaap:AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax


Available
Period End2021-06-262021-03-272020-12-262018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-312016-09-24
Value1000.011000.01000.011000.018000.010000.02000.05000.05000.07000.05000.0
Percentage of AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax us-gaap:InvestmentType

us-gaap:CorporateDebtSecurities


Available
Period End2021-06-262021-03-272020-12-262018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-312016-09-24
Value1000.011000.01000.05000.09000.06000.02000.04000.02000.06000.05000.0
Percentage of AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax100.0100.0100.045.550.060.0100.080.040.085.7100.0

us-gaap:AvailableForSaleSecuritiesAmortizedCost

us-gaap:AvailableForSaleSecuritiesAmortizedCost


Available
Period End2021-06-262021-03-272020-12-262018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-312016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272013-09-282013-06-292013-03-302012-12-292012-09-292012-06-302011-12-31
Value801472023242116212231199.2159.5751.6521.4671.4531.111.1551.1556.6056.7827.2977.407344751
Percentage of AvailableForSaleSecuritiesAmortizedCost100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AvailableForSaleSecuritiesAmortizedCost us-gaap:InvestmentType

us-gaap:CertificatesOfDeposit


Available
Period End2021-06-262021-03-272020-12-262018-06-302018-03-312017-09-302017-06-242017-03-252016-12-312016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-27
Value1.550.750.753.752.81.2991.2940.750.753.3130.9130.0241.0021.0021.01.01.01.0
Percentage of AvailableForSaleSecuritiesAmortizedCost1.90.53.615.711.47.95.93.42.317.09.90.360.768.368.890.186.686.6

us-gaap:CorporateDebtSecurities


Available
Period End2021-06-262021-03-272020-12-262018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-312016-09-242016-06-252016-03-26
Value70136141011129.843131222117.6478.89
Percentage of AvailableForSaleSecuritiesAmortizedCost88.292.272.345.446.059.960.262.855.070.459.183.092.8

us-gaap:ForeignGovernmentDebtSecurities


Available
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-312016-09-242016-06-252016-03-262015-12-262015-09-262015-06-27
Value0.9540.960.9650.9490.920.9010.9040.5730.5810.5650.560.5490.5560.5940.6190.6030.6160.6150.6230.6390.6550.6610.650.4650.453
Percentage of AvailableForSaleSecuritiesAmortizedCost1.20.64.70.00.00.00.00.00.00.00.00.02.32.42.93.72.82.71.93.37.16.939.331.731.2

us-gaap:USGovernmentSponsoredEnterprisesDebtSecurities


Available
Period End2021-06-262021-03-272020-12-262018-06-302018-03-312017-06-242017-03-252016-12-312016-09-24
Value2.01.9991.9980.9940.9921.08.7018.1094.012
Percentage of AvailableForSaleSecuritiesAmortizedCost2.51.49.74.24.04.638.925.320.6

us-gaap:USTreasurySecurities


Available
Period End2021-06-262021-03-272020-12-262018-06-302018-03-312017-12-302017-09-302017-06-24
Value4.9677.8112.0127.7268.9137.9354.5965.197
Percentage of AvailableForSaleSecuritiesAmortizedCost6.25.39.732.436.237.228.123.8

us-gaap:AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue

us-gaap:AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue


Available
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-312016-09-242015-12-262012-09-292012-06-302011-12-31
Value6.7618.70.00.00.00.00.00.00.00.00.01423137.5161826100.00.05.912
Percentage of AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue100.0100.0100.00.00.00.00.00.00.00.00.00.0100.0100.0100.0100.0100.0100.0100.0100.00.00.0100.0100.0

us-gaap:AvailableForSaleSecuritiesCurrent

us-gaap:AvailableForSaleSecuritiesCurrent


Available
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-312016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282013-06-292013-03-302012-12-292012-09-292012-06-302012-03-312011-12-312011-09-242011-06-252010-12-25
Value80147200.9490.920.9010.9040.5730.5810.5650.560.54923242116212231199.2159.5761.6521.4671.4531.111.1551.1550.21.0751.26.6096.7897.3087.42134475351505252
Percentage of AvailableForSaleSecuritiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AvailableForSaleSecuritiesCurrent us-gaap:InvestmentType

us-gaap:CertificatesOfDeposit


Available
Period End2021-06-262021-03-272020-12-262018-06-302018-03-312017-09-302017-06-242017-03-252016-12-312016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-27
Value1.5510.750.753.752.7991.2991.2940.7510.7513.3140.9130.0241.0021.0021.01.01.01.0
Percentage of AvailableForSaleSecuritiesCurrent1.90.53.615.711.47.95.93.42.317.09.90.360.768.368.890.186.686.6

us-gaap:CorporateDebtSecurities


Available
Period End2021-06-262021-03-272020-12-262018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-312016-09-242016-06-252016-03-26
Value70136141011129.842131222117.6478.891
Percentage of AvailableForSaleSecuritiesCurrent88.292.272.345.446.059.960.262.855.070.459.083.092.8

us-gaap:ForeignGovernmentDebtSecurities


Available
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-312016-09-242016-06-252016-03-262015-12-262015-09-262015-06-27
Value0.9540.960.9650.9490.920.9010.9040.5730.5810.5650.560.5490.5560.5940.6190.6030.6160.6150.6230.6390.6550.6610.650.4650.453
Percentage of AvailableForSaleSecuritiesCurrent1.20.64.7100.0100.0100.0100.0100.0100.0100.0100.0100.02.32.42.93.72.82.71.93.37.16.939.331.731.2

us-gaap:USGovernmentSponsoredEnterprisesDebtSecurities


Available
Period End2021-06-262021-03-272020-12-262018-06-302018-03-312017-06-242017-03-252016-12-312016-09-24
Value2.02.01.9980.9930.9921.08.6988.1084.014
Percentage of AvailableForSaleSecuritiesCurrent2.51.49.74.24.04.638.925.320.6

us-gaap:USTreasurySecurities


Available
Period End2021-06-262021-03-272020-12-262018-06-302018-03-312017-12-302017-09-302017-06-24
Value4.9677.8112.0127.7218.9057.9314.5965.196
Percentage of AvailableForSaleSecuritiesCurrent6.25.39.732.436.237.228.123.8

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesSingleMaturityDate

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesSingleMaturityDate


Available
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-28
Value80147200.9490.920.9010.904
Percentage of AvailableForSaleSecuritiesDebtMaturitiesSingleMaturityDate100.0100.0100.0100.0100.0100.0100.0

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesSingleMaturityDateAmortizedCostBasis

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesSingleMaturityDateAmortizedCostBasis


Available
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-28
Value80147200.9490.920.9010.904
Percentage of AvailableForSaleSecuritiesDebtMaturitiesSingleMaturityDateAmortizedCostBasis100.0100.0100.0100.0100.0100.0100.0

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost


Available
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-312016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-28
Value79146200.9490.920.9010.023242116212131199.2159.5751.451.4671.4531.111.1551.1550.21.0751.2
Percentage of AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue


Available
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-312016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-28
Value79146200.9490.920.9010.023242116212131199.2159.5761.451.4671.4531.111.1551.1550.21.0751.2
Percentage of AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CapitalizedComputerSoftwareGross

us-gaap:CapitalizedComputerSoftwareGross


Capitalized
Period End2021-06-262021-03-272020-12-262019-12-28
Value12121310
Percentage of CapitalizedComputerSoftwareGross100.0100.0100.0100.0

us-gaap:CashAndCashEquivalentsFairValueDisclosure us-gaap:CashAndCashEquivalents, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency

us-gaap:CashAndCashEquivalentsFairValueDisclosure

us-gaap:Cash, us-gaap:FairValueInputsLevel1, us-gaap:FairValueMeasurementsRecurring


Cash
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-312015-12-26
Value34611512814411216314713213013914414199841009873577073
Percentage of CashAndCashEquivalentsFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:MoneyMarketFunds, us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring


Cash
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-312015-12-26
Value7.699271925507.6947.67113121919291915221314172441
Percentage of CashAndCashEquivalentsFairValueDisclosure2.223.815.317.444.64.75.29.910.014.213.721.019.418.122.014.019.330.934.456.4

us-gaap:CashAndCashEquivalentsFairValueDisclosure us-gaap:CashAndCashEquivalents, us-gaap:FairValueByMeasurementFrequency

us-gaap:Cash, us-gaap:FairValueMeasurementsRecurring


Cash
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-312015-12-26
Value34611512814411216314713213013914414199841009873577073
Percentage of CashAndCashEquivalentsFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:MoneyMarketFunds, us-gaap:FairValueMeasurementsRecurring


Cash
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-312015-12-26
Value7.699271925507.6947.67113121919291915221314172441
Percentage of CashAndCashEquivalentsFairValueDisclosure2.223.815.317.444.64.75.29.910.014.213.721.019.418.122.014.019.330.934.456.4

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations


Cash
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302016-12-31
Value35314314916916217115514614316016417012711513496
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CashSurrenderValueOfLifeInsurance

us-gaap:CashSurrenderValueOfLifeInsurance


Cash
Period End2020-12-262019-12-282018-12-292017-12-302016-12-312015-12-262014-12-272013-12-282012-12-292011-12-31
Value1800000.01700000.01600000.02200000.02200000.02300000.02400000.02100000.01700000.01600000.0
Percentage of CashSurrenderValueOfLifeInsurance100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DebtInstrumentCarryingAmount us-gaap:DebtInstrument

us-gaap:DebtInstrumentCarryingAmount

cohu:ConstructionLoan


Debt
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272019-12-28
Value10109.9029.5448.4085.476
Percentage of DebtInstrumentCarryingAmount100.0100.0100.0100.0100.0100.0

cohu:KitaTermLoans


Debt
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292017-12-30
Value3.2963.3953.6623.6553.6673.7453.834.0424.184.3544.5765.855
Percentage of DebtInstrumentCarryingAmount32.133.037.038.343.60.069.90.00.00.00.00.0

cohu:SecuredTermLoanFacility


Debt
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-29
Value204204306327344345346346347348349
Percentage of DebtInstrumentCarryingAmount1983.91989.53096.63431.34100.30.06327.60.00.00.00.0

us-gaap:DebtInstrumentCollateralAmount us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:DebtInstrumentCollateralAmount

cohu:ThirdFacility, us-gaap:ConstructionLoans


Debt
Period End2021-06-262021-03-272019-07-26
Value400000.0400000.01500000.0
Percentage of DebtInstrumentCollateralAmount100.0100.0100.0

us-gaap:DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet

us-gaap:DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet


Debt
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-29
Value3366000.03558000.05568000.06225000.06851000.07151000.07441000.07725000.08004000.08280000.08551000.0
Percentage of DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DebtInstrumentUnusedBorrowingCapacityAmount us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:DebtInstrumentUnusedBorrowingCapacityAmount

cohu:SecondFacility, us-gaap:ConstructionLoans


Debt
Period End2020-12-26
Value300000.0
Percentage of DebtInstrumentUnusedBorrowingCapacityAmount100.0

cohu:ThirdFacility, us-gaap:ConstructionLoans


Debt
Period End2020-09-26
Value400000.0
Percentage of DebtInstrumentUnusedBorrowingCapacityAmount0.0

us-gaap:DecreaseInUnrecognizedTaxBenefitsIsReasonablyPossible

us-gaap:DecreaseInUnrecognizedTaxBenefitsIsReasonablyPossible


Decrease
Period End2020-12-262018-12-292017-12-30
Value600000.02700000.0600000.0
Percentage of DecreaseInUnrecognizedTaxBenefitsIsReasonablyPossible100.0100.0100.0

us-gaap:DeferredCompensationLiabilityCurrent

us-gaap:DeferredCompensationLiabilityCurrent


Deferred
Period End2020-12-262019-12-282018-12-292017-12-302016-12-312015-12-262014-12-272013-12-282012-12-292011-12-31
Value1800000.02000000.02000000.02300000.02400000.02600000.02600000.02400000.02100000.02000000.0
Percentage of DeferredCompensationLiabilityCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredIncome

us-gaap:DeferredIncome


Deferred
Period End2020-09-262020-06-272020-03-282019-12-28
Value21181816
Percentage of DeferredIncome100.0100.0100.0100.0

us-gaap:DeferredIncomeTaxLiabilities

us-gaap:DeferredIncomeTaxLiabilities


Deferred
Period End2020-12-262019-12-282018-12-292017-12-302016-12-312015-12-262014-12-27
Value5973788.0778.1389.69413
Percentage of DeferredIncomeTaxLiabilities100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredRevenue

us-gaap:DeferredRevenue


Deferred
Period End2021-06-262021-03-272020-12-262019-12-282018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-312016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282013-06-292013-03-302012-12-292012-09-292012-06-302011-12-31
Value362517163.63.45.9109.98.25.79.36.49.97.35.08.612121122159.07.47.2106.73.62.46.96.6
Percentage of DeferredRevenue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsGross

us-gaap:DeferredTaxAssetsGross


Deferred
Period End2020-12-262019-12-282018-12-292017-12-302016-12-312015-12-262014-12-272013-12-282012-12-292011-12-31
Value12214012737474544453029
Percentage of DeferredTaxAssetsGross100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsOperatingLossCarryforwards

us-gaap:DeferredTaxAssetsOperatingLossCarryforwards


Deferred
Period End2020-12-262019-12-282018-12-292017-12-302016-12-312015-12-262014-12-272013-12-282012-12-292011-12-31
Value5669657.467117.6058.2669.072.2991.069
Percentage of DeferredTaxAssetsOperatingLossCarryforwards100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsOther

us-gaap:DeferredTaxAssetsOther


Deferred
Period End2020-12-262019-12-282018-12-292017-12-302016-12-312015-12-262014-12-272013-12-282012-12-292011-12-31
Value4221000.07885000.03637000.0208000.0103000.0265000.0608000.0121000.0243000.0207000.0
Percentage of DeferredTaxAssetsOther100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsTaxCreditCarryforwards

us-gaap:DeferredTaxAssetsTaxCreditCarryforwards


Deferred
Period End2020-12-262019-12-282018-12-292017-12-302016-12-312015-12-262014-12-272013-12-282012-12-292011-12-31
Value37363414131211117.7647.213
Percentage of DeferredTaxAssetsTaxCreditCarryforwards100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeBenefits

us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeBenefits


Deferred
Period End2020-12-262019-12-282018-12-292017-12-302016-12-312015-12-262014-12-272013-12-282012-12-292011-12-31
Value5306000.04685000.05134000.04796000.05002000.04993000.05232000.03709000.02167000.02233000.0
Percentage of DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeBenefits100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost

us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost


Deferred
Period End2020-12-262019-12-282018-12-292017-12-302016-12-312015-12-262014-12-272013-12-282012-12-292011-12-31
Value2210000.02372000.02108000.01897000.04189000.04443000.04352000.03972000.03409000.02715000.0
Percentage of DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxLiabilitiesUndistributedForeignEarnings

us-gaap:DeferredTaxLiabilitiesUndistributedForeignEarnings


Deferred
Period End2020-12-262019-12-282018-12-292017-12-30
Value3119000.02462000.05257000.02002000.0
Percentage of DeferredTaxLiabilitiesUndistributedForeignEarnings100.0100.0100.0100.0

us-gaap:DefinedBenefitPlanAccumulatedBenefitObligation us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanAccumulatedBenefitObligation

us-gaap:DefinedBenefitPostretirementHealthCoverage


Defined
Period End2020-12-262019-12-282018-12-292017-12-302016-12-312015-12-26
Value2398000.02571000.02880000.03148000.02490000.02649000.0
Percentage of DefinedBenefitPlanAccumulatedBenefitObligation100.0100.0100.0100.0100.0100.0

us-gaap:DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesAfterTax us-gaap:RetirementPlanName

us-gaap:DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesAfterTax

cohu:SwissPlan


Defined
Period End2020-12-262019-12-282018-12-292017-12-302016-12-31
Value-1300000.0-4100000.0-2700000.0-3100000.0-2400000.0
Percentage of DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesAfterTax100.0100.0100.0100.0100.0

us-gaap:DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate us-gaap:RetirementPlanName

us-gaap:DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate

cohu:SwissPlan


Defined
Period End2020-12-262019-12-282018-12-292017-12-302016-12-31
Value0.20.0020.0090.0070.007
Percentage of DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate100.0100.0100.0100.0100.0

us-gaap:DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPostretirementHealthCoverage


Defined
Period End2020-12-262019-12-282018-12-292017-12-302016-12-312015-12-26
Value2.10.030.0410.0340.0390.042
Percentage of DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate1050.01500.0455.6485.7557.10.0

us-gaap:DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationRateOfCompensationIncrease us-gaap:RetirementPlanName

us-gaap:DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationRateOfCompensationIncrease

cohu:SwissPlan


Defined
Period End2020-12-262019-12-282018-12-292017-12-302016-12-31
Value1.10.0110.0180.0180.015
Percentage of DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationRateOfCompensationIncrease100.0100.0100.0100.0100.0

us-gaap:DefinedBenefitPlanBenefitObligation us-gaap:RetirementPlanName

us-gaap:DefinedBenefitPlanBenefitObligation

cohu:SwissPlan


Defined
Period End2020-12-262019-12-282018-12-292017-12-302016-12-312015-12-26
Value313229302725
Percentage of DefinedBenefitPlanBenefitObligation100.0100.0100.0100.0100.0100.0

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter us-gaap:RetirementPlanName

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter

cohu:SwissPlan


Defined
Period End2020-12-262019-12-282018-12-292017-12-30
Value6500000.07000000.05900000.06000000.0
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter100.0100.0100.0100.0

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPostretirementHealthCoverage


Defined
Period End2020-12-262019-12-282018-12-292017-12-30
Value600000.0700000.0900000.0900000.0
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter9.210.015.315.0

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths us-gaap:RetirementPlanName

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths

cohu:SwissPlan


Defined
Period End2020-12-262019-12-282018-12-292017-12-30
Value1300000.01400000.0700000.0800000.0
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths100.0100.0100.0100.0

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive us-gaap:RetirementPlanName

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive

cohu:SwissPlan


Defined
Period End2020-12-262019-12-282018-12-292017-12-30
Value1100000.01300000.01300000.0900000.0
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive100.0100.0100.0100.0

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPostretirementHealthCoverage


Defined
Period End2020-12-262019-12-282018-12-292017-12-30
Value100000.0100000.0200000.0200000.0
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive9.17.715.422.2

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour us-gaap:RetirementPlanName

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour

cohu:SwissPlan


Defined
Period End2020-12-262019-12-282018-12-292017-12-30
Value1300000.01700000.0800000.01100000.0
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour100.0100.0100.0100.0

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPostretirementHealthCoverage


Defined
Period End2020-12-262019-12-282018-12-292017-12-30
Value100000.0100000.0200000.0100000.0
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour7.75.925.09.1

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree us-gaap:RetirementPlanName

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree

cohu:SwissPlan


Defined
Period End2020-12-262019-12-282018-12-292017-12-30
Value1800000.01100000.01000000.0900000.0
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree100.0100.0100.0100.0

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo us-gaap:RetirementPlanName

us-gaap:DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo

cohu:SwissPlan


Defined
Period End2020-12-262019-12-282018-12-292017-12-30
Value1100000.01300000.0900000.0900000.0
Percentage of DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo100.0100.0100.0100.0

us-gaap:DefinedBenefitPlanFairValueOfPlanAssets us-gaap:RetirementPlanName

us-gaap:DefinedBenefitPlanFairValueOfPlanAssets

cohu:SwissPlan


Defined
Period End2020-12-262019-12-282018-12-292017-12-302016-12-312015-12-26
Value181818171614
Percentage of DefinedBenefitPlanFairValueOfPlanAssets100.0100.0100.0100.0100.0100.0

us-gaap:DefinedBenefitPlanFundedStatusOfPlan us-gaap:RetirementPlanName

us-gaap:DefinedBenefitPlanFundedStatusOfPlan

cohu:SwissPlan


Defined
Period End2020-12-262019-12-282018-12-292017-12-302016-12-31
Value-12283000.0-13536000.0-11822000.0-12766000.0-11422000.0
Percentage of DefinedBenefitPlanFundedStatusOfPlan100.0100.0100.0100.0100.0

us-gaap:DefinedBenefitPlanFundedStatusOfPlan us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPostretirementHealthCoverage


Defined
Period End2020-12-262019-12-282018-12-292017-12-302016-12-31
Value-2398000.0-2571000.0-2880000.0-3148000.0-2490000.0
Percentage of DefinedBenefitPlanFundedStatusOfPlan19.519.024.424.721.8

us-gaap:DefinedBenefitPlanHealthCareCostTrendRateAssumedNextFiscalYear us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanHealthCareCostTrendRateAssumedNextFiscalYear

us-gaap:DefinedBenefitPostretirementHealthCoverage


Defined
Period End2020-12-26
Value6.8
Percentage of DefinedBenefitPlanHealthCareCostTrendRateAssumedNextFiscalYear100.0

us-gaap:DefinedBenefitPlanPlanAssetsTargetAllocationPercentage us-gaap:DefinedBenefitPlanByPlanAssetCategories, us-gaap:RetirementPlanName

us-gaap:DefinedBenefitPlanPlanAssetsTargetAllocationPercentage

cohu:AlternativeInvestments, cohu:SwissPlan


Defined
Period End2020-12-262019-12-282018-12-292017-12-30
Value10.00.10.080.09
Percentage of DefinedBenefitPlanPlanAssetsTargetAllocationPercentage100.0100.0100.0100.0

cohu:DebtSecuritiesAndCash, cohu:SwissPlan


Defined
Period End2020-12-262019-12-282018-12-292017-12-30
Value58.00.620.670.68
Percentage of DefinedBenefitPlanPlanAssetsTargetAllocationPercentage580.0620.0837.5755.6

cohu:RealEstateInvestments, cohu:SwissPlan


Defined
Period End2020-12-262019-12-282018-12-292017-12-30
Value20.00.170.160.15
Percentage of DefinedBenefitPlanPlanAssetsTargetAllocationPercentage200.0170.0200.0166.7

us-gaap:DefinedBenefitPlanEquitySecurities, cohu:SwissPlan


Defined
Period End2020-12-262019-12-282018-12-29
Value12.00.110.09
Percentage of DefinedBenefitPlanPlanAssetsTargetAllocationPercentage120.0110.0112.5

us-gaap:DefinedBenefitPlanUltimateHealthCareCostTrendRate1 us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanUltimateHealthCareCostTrendRate1

us-gaap:DefinedBenefitPostretirementHealthCoverage


Defined
Period End2020-12-26
Value4.4
Percentage of DefinedBenefitPlanUltimateHealthCareCostTrendRate1100.0

us-gaap:DerivativeAssets us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation

us-gaap:DerivativeAssets

us-gaap:ForeignExchangeForward, us-gaap:Nondesignated


Derivative
Period End2021-06-262021-03-272020-12-26
Value453226
Percentage of DerivativeAssets100.0100.0100.0

us-gaap:DerivativeAssets us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation, us-gaap:Position

cohu:EuroForeignExchangeForward, us-gaap:Nondesignated, us-gaap:Long


Derivative
Period End2021-06-262021-03-272020-12-26
Value26139.424
Percentage of DerivativeAssets57.740.435.6

cohu:JapaneseYenForeignExchangeForward, us-gaap:Nondesignated, us-gaap:Long


Derivative
Period End2021-03-27
Value294
Percentage of DerivativeAssets896.1

cohu:MalaysianRinggitForeignExchangeForward, us-gaap:Nondesignated, us-gaap:Long


Derivative
Period End2021-06-262021-03-27
Value1414
Percentage of DerivativeAssets31.944.2

cohu:SouthKoreanWonForwardExchangeForward, us-gaap:Nondesignated, us-gaap:Long


Derivative
Period End2021-06-26
Value1930
Percentage of DerivativeAssets4224.3

cohu:SwissFrancForeignExchangeForward, us-gaap:Nondesignated, us-gaap:Long


Derivative
Period End2021-06-262021-03-272020-12-26
Value8.2561013
Percentage of DerivativeAssets18.131.450.4

us-gaap:DisposalGroupIncludingDiscontinuedOperationGoodwill1 us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations

us-gaap:DisposalGroupIncludingDiscontinuedOperationGoodwill1

us-gaap:DisposalGroupDisposedOfBySaleNotDiscontinuedOperations, cohu:PCBTestEquipment


Disposal
Period End2021-06-24
Value21
Percentage of DisposalGroupIncludingDiscontinuedOperationGoodwill1100.0

us-gaap:DisposalGroupIncludingDiscontinuedOperationIntangibleAssets us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations

us-gaap:DisposalGroupIncludingDiscontinuedOperationIntangibleAssets

us-gaap:DisposalGroupDisposedOfBySaleNotDiscontinuedOperations, cohu:PCBTestEquipment


Disposal
Period End2021-06-24
Value10000000.0
Percentage of DisposalGroupIncludingDiscontinuedOperationIntangibleAssets100.0

us-gaap:EmployeeRelatedLiabilitiesCurrent

us-gaap:EmployeeRelatedLiabilitiesCurrent


Employee
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-312016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282013-06-292013-03-302012-12-292012-09-292012-06-302012-03-312011-12-312011-09-242011-06-252010-12-25
Value353234322520232524212917161320181615141714141516131319201614151513141011101012141416
Percentage of EmployeeRelatedLiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized us-gaap:AwardType

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized

cohu:UnvestedRestrictedStockUnits


Employee
Period End2020-12-26
Value17
Percentage of EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized100.0

us-gaap:FinanceLeaseLiability

us-gaap:FinanceLeaseLiability


Finance
Period End2021-06-262021-03-272020-12-262020-09-26
Value352000.0392000.0401000.0403000.0
Percentage of FinanceLeaseLiability100.0100.0100.0100.0

us-gaap:FinanceLeaseLiabilityCurrent

us-gaap:FinanceLeaseLiabilityCurrent


Finance
Period End2020-09-262020-06-272019-12-28
Value164000.02691000.02574000.0
Percentage of FinanceLeaseLiabilityCurrent100.0100.0100.0

us-gaap:FinanceLeaseLiabilityCurrent us-gaap:BalanceSheetLocation

cohu:OtherAccruedLiabilities


Finance
Period End2021-06-262021-03-272020-12-262020-03-282019-12-28
Value185000.0182000.0179000.02688000.02574000.0
Percentage of FinanceLeaseLiabilityCurrent0.00.00.00.0100.0

us-gaap:FinanceLeaseLiabilityNoncurrent

us-gaap:FinanceLeaseLiabilityNoncurrent


Finance
Period End2020-09-262020-06-272020-03-282019-12-28
Value239000.0198000.0249000.00
Percentage of FinanceLeaseLiabilityNoncurrent100.0100.0100.00.0

us-gaap:FinanceLeaseLiabilityNoncurrent us-gaap:BalanceSheetLocation

cohu:LongtermLeaseLiabilities


Finance
Period End2021-06-262021-03-272020-12-26
Value167000.0210000.0222000.0
Percentage of FinanceLeaseLiabilityNoncurrent0.00.00.0

us-gaap:FinanceLeaseLiabilityPaymentsDue

us-gaap:FinanceLeaseLiabilityPaymentsDue


Finance
Period End2021-06-262021-03-272020-12-262020-09-26
Value357000.0397000.0401000.0403000.0
Percentage of FinanceLeaseLiabilityPaymentsDue100.0100.0100.0100.0

us-gaap:FinanceLeaseLiabilityPaymentsDueNextTwelveMonths

us-gaap:FinanceLeaseLiabilityPaymentsDueNextTwelveMonths


Finance
Period End2021-06-262021-03-272020-12-262020-09-26
Value186000.0184000.0179000.0164000.0
Percentage of FinanceLeaseLiabilityPaymentsDueNextTwelveMonths100.0100.0100.0100.0

us-gaap:FinanceLeaseLiabilityPaymentsDueYearThree

us-gaap:FinanceLeaseLiabilityPaymentsDueYearThree


Finance
Period End2021-06-262021-03-272020-12-262020-09-26
Value11000.011000.043000.034000.0
Percentage of FinanceLeaseLiabilityPaymentsDueYearThree100.0100.0100.0100.0

us-gaap:FinanceLeaseLiabilityPaymentsDueYearTwo

us-gaap:FinanceLeaseLiabilityPaymentsDueYearTwo


Finance
Period End2021-06-262021-03-272020-12-262020-09-26
Value52000.051000.0179000.0164000.0
Percentage of FinanceLeaseLiabilityPaymentsDueYearTwo100.0100.0100.0100.0

us-gaap:FinanceLeaseLiabilityPaymentsRemainderOfFiscalYear

us-gaap:FinanceLeaseLiabilityPaymentsRemainderOfFiscalYear


Finance
Period End2021-06-262021-03-272020-09-26
Value93000.0138000.041000.0
Percentage of FinanceLeaseLiabilityPaymentsRemainderOfFiscalYear100.0100.0100.0

us-gaap:FinanceLeaseRightOfUseAsset

us-gaap:FinanceLeaseRightOfUseAsset


Finance
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-28
Value486000.0502000.0486000.0463000.02841000.02865000.02515000.0
Percentage of FinanceLeaseRightOfUseAsset100.0100.0100.0100.0100.0100.0100.0

us-gaap:FinanceLeaseRightOfUseAssetAccumulatedAmortization

us-gaap:FinanceLeaseRightOfUseAssetAccumulatedAmortization


Finance
Period End2021-06-262021-03-272020-12-262020-06-272020-03-282019-12-28
Value100000.0100000.0100000.0200000.0100000.0100000.0
Percentage of FinanceLeaseRightOfUseAssetAccumulatedAmortization100.0100.0100.0100.0100.0100.0

us-gaap:FinanceLeaseWeightedAverageDiscountRatePercent

us-gaap:FinanceLeaseWeightedAverageDiscountRatePercent


Finance
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-28
Value0.60.6000.040.0390.045
Percentage of FinanceLeaseWeightedAverageDiscountRatePercent100.0100.00.00.0100.0100.0100.0

us-gaap:FiniteLivedIntangibleAssetsAccumulatedAmortization

us-gaap:FiniteLivedIntangibleAssetsAccumulatedAmortization


Finite
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292017-12-302017-09-302017-06-242017-03-252016-12-312016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-312013-12-282013-09-282013-06-292013-03-302012-12-292012-09-292011-12-31
Value1261181129988787464554435181716153940383634323129302929272525231917161512
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FiniteLivedIntangibleAssetsAccumulatedAmortization us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:CustomerRelationships


Finite
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292017-12-302017-09-302017-06-242016-12-31
Value2323222018161412119.1987.3784.8384.5824.3483.644
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization18.820.020.220.420.620.819.819.920.120.421.026.226.226.39.2

us-gaap:DevelopedTechnologyRights


Finite
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292017-12-302017-09-302017-06-242016-12-31
Value95888373655749423527211211119.597
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization75.674.374.173.973.773.466.565.163.562.260.268.468.468.924.3

us-gaap:NoncompeteAgreements


Finite
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292017-12-302017-09-30
Value0.1430.1370.1360.1250.1150.1060.0960.090.0820.0720.0630.0310.023
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization0.10.10.10.10.10.10.10.10.10.20.20.20.1

us-gaap:TradeNames


Finite
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292017-12-302017-09-302017-06-242017-03-252016-12-312016-09-242016-06-252016-03-262015-12-26
Value6.8466.6626.2795.5914.9784.4433.8923.3392.8722.3171.8070.9720.8490.7340.5730.4680.4010.3050.2120.092
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization5.45.65.65.65.65.75.25.25.25.15.15.34.84.43.81.21.00.80.60.3

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive


Finite
Period End2020-12-26
Value53
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths


Finite
Period End2020-12-26
Value36
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFive

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFive


Finite
Period End2020-12-26
Value27
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseYearFive100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFour

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFour


Finite
Period End2020-12-26
Value36
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseYearFour100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearThree

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearThree


Finite
Period End2020-12-26
Value36
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseYearThree100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo


Finite
Period End2020-12-26
Value36
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo100.0

us-gaap:FiniteLivedIntangibleAssetsGross

us-gaap:FiniteLivedIntangibleAssetsGross


Finite
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292017-12-302017-09-302017-06-242017-03-252016-12-312016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-312013-12-282013-09-282013-06-292013-03-302012-12-292012-09-292011-12-31
Value328336338330323322322324319314317353535325760606059545554575964646464635251333231
Percentage of FiniteLivedIntangibleAssetsGross100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FiniteLivedIntangibleAssetsGross us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:CustomerRelationships


Finite
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292017-12-302017-09-302017-06-242016-12-31
Value67737473717172717372737.9347.9357.9836.996
Percentage of FiniteLivedIntangibleAssetsGross20.521.922.222.222.222.222.422.122.923.123.022.522.522.612.2

us-gaap:DevelopedTechnologyRights


Finite
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292017-12-302017-09-302017-06-242016-12-31
Value23923823923322822822722321621221420202119
Percentage of FiniteLivedIntangibleAssetsGross73.071.170.770.770.670.670.568.967.867.667.459.058.959.633.5

us-gaap:NoncompeteAgreements


Finite
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292017-12-302017-09-30
Value0.3180.3210.340.3340.3290.3270.3220.3260.3270.3180.3140.3130.312
Percentage of FiniteLivedIntangibleAssetsGross0.10.10.10.10.10.10.10.10.10.10.10.90.9

us-gaap:TradeNames


Finite
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292017-12-302017-09-302017-06-242017-03-252016-12-312016-09-242016-06-252016-03-262015-12-262014-12-27
Value21232323222222222222226.1856.1396.1765.4985.3535.6515.6285.6145.5475.723
Percentage of FiniteLivedIntangibleAssetsGross6.56.97.07.07.07.07.06.97.17.27.117.617.417.517.09.39.39.39.39.39.9

us-gaap:InventoryFinishedGoodsNetOfReserves

us-gaap:InventoryFinishedGoodsNetOfReserves


Inventory
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-312016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282013-06-292013-03-302012-12-292012-09-292011-12-31
Value18151415171714181615218.84410109.0377.236.5865.7264.8665.2565.2484.6136.8017.36.6676.5957.0738.6547.8621211118.55210101219
Percentage of InventoryFinishedGoodsNetOfReserves100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InventoryRawMaterialsAndSuppliesNetOfReserves

us-gaap:InventoryRawMaterialsAndSuppliesNetOfReserves


Inventory
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-30
Value899083747873697068636030282727
Percentage of InventoryRawMaterialsAndSuppliesNetOfReserves100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InventoryWorkInProcessNetOfReserves

us-gaap:InventoryWorkInProcessNetOfReserves


Inventory
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-312016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282013-06-292013-03-302012-12-292012-09-292011-12-31
Value48544447454446445251572423252522252117182022201818222122232418171820141515
Percentage of InventoryWorkInProcessNetOfReserves100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths


Lessee
Period End2021-06-262021-03-272020-12-262020-09-26
Value6120000.06742000.07015000.06733000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths100.0100.0100.0100.0

us-gaap:LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear

us-gaap:LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear


Lessee
Period End2021-06-262021-03-272020-09-26
Value3200000.05435000.01709000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear100.0100.0100.0

us-gaap:LineOfCredit

us-gaap:LineOfCredit


Line
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292017-12-302017-09-302017-06-242017-03-252016-12-312016-09-242016-06-252016-03-262015-12-262014-12-27
Value3160000.05018000.05314000.05209000.04665000.03244000.03195000.03241000.03244000.03161000.03115000.03108000.0000000000
Percentage of LineOfCredit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.00.00.00.00.00.0

us-gaap:LineOfCredit us-gaap:CreditFacility

us-gaap:RevolvingCreditFacility


Line
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292017-09-302017-06-242017-03-25
Value3200000.05000000.05300000.05200000.04700000.03200000.03200000.03300000.03200000.03200000.03100000.03100000.03200000.03200000.0
Percentage of LineOfCredit101.399.699.799.8100.898.6100.2101.898.6101.299.50.00.00.0

us-gaap:LineOfCreditFacilityMaximumBorrowingCapacity us-gaap:CreditFacility

us-gaap:LineOfCreditFacilityMaximumBorrowingCapacity

us-gaap:RevolvingCreditFacility


Line
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292017-09-302017-06-242017-03-25
Value8700000.08800000.09300000.09100000.09000000.08900000.08800000.08900000.06500000.06300000.06200000.06200000.06300000.06300000.0
Percentage of LineOfCreditFacilityMaximumBorrowingCapacity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LoansPayableToBankCurrent

us-gaap:LoansPayableToBankCurrent


Loans
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-25
Value1023.8333.0752.993.2543.3223.3223.1413.2433.4223.6721.0211.1851.2911.281.31.4091.19
Percentage of LoansPayableToBankCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LongTermDebtFairValue

us-gaap:LongTermDebtFairValue


Long
Period End2021-03-272020-12-262020-09-26
Value204303317
Percentage of LongTermDebtFairValue100.0100.0100.0

us-gaap:LongTermDebtFairValue us-gaap:DebtInstrument

cohu:SecuredTermLoanFacility


Long
Period End2021-06-26
Value203
Percentage of LongTermDebtFairValue0.0

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive


Long
Period End2020-12-26
Value7957000.0
Percentage of LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive100.0

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths


Long
Period End2020-12-26
Value9512000.0
Percentage of LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths100.0

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive


Long
Period End2020-12-26
Value293
Percentage of LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive100.0

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour


Long
Period End2020-12-26
Value4730000.0
Percentage of LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour100.0

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree


Long
Period End2020-12-26
Value4725000.0
Percentage of LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree100.0

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo


Long
Period End2020-12-26
Value4720000.0
Percentage of LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo100.0

us-gaap:LongTermLoansFromBank

us-gaap:LongTermLoansFromBank


Long
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-25
Value1112113113313483463463443413423463.844.0944.5474.5754.8535.2655.894
Percentage of LongTermLoansFromBank100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingLeaseWeightedAverageDiscountRatePercent

us-gaap:OperatingLeaseWeightedAverageDiscountRatePercent


Operating
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-28
Value6.36.26.36.30.0630.0630.063
Percentage of OperatingLeaseWeightedAverageDiscountRatePercent100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingLossCarryforwards us-gaap:IncomeTaxAuthority

us-gaap:OperatingLossCarryforwards

us-gaap:DomesticCountry


Operating
Period End2020-12-262019-12-282018-12-292017-12-302016-12-312015-12-26
Value200246244313119
Percentage of OperatingLossCarryforwards100.0100.0100.0100.0100.0100.0

us-gaap:ForeignCountry


Operating
Period End2020-12-262019-12-282018-12-292016-12-312015-12-26
Value2225120.21.6
Percentage of OperatingLossCarryforwards11.210.25.20.68.3

us-gaap:StateAndLocalJurisdiction


Operating
Period End2020-12-262019-12-282018-12-292017-12-302016-12-312015-12-26
Value130160147192221
Percentage of OperatingLossCarryforwards64.865.060.460.971.6110.4

us-gaap:OtherAccruedLiabilitiesNoncurrent

us-gaap:OtherAccruedLiabilitiesNoncurrent


Other
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-312016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272013-09-282013-06-292013-03-302012-12-292012-09-292012-06-302012-03-312011-12-312011-09-242011-06-252010-12-25
Value8.9858.9578.98.1238.388.548.6567.2095.7954.6244.2592.8523.1462.5633.5562.293.4553.3351.7652.0891.81.7281.7641.8651.9041.1931.0751714135.8476.0375.9516.0035.9646.2656.0995.931
Percentage of OtherAccruedLiabilitiesNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PostemploymentBenefitsLiabilityNoncurrent

us-gaap:PostemploymentBenefitsLiabilityNoncurrent


Postemployment
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-312016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282012-12-29
Value212121222222212020191918181818171616151615151514151513101010103.729
Percentage of PostemploymentBenefitsLiabilityNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PrepaidExpenseCurrent

us-gaap:PrepaidExpenseCurrent


Prepaid
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292017-12-30
Value19231817202017192218268.338
Percentage of PrepaidExpenseCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProductWarrantyAccrual

us-gaap:ProductWarrantyAccrual


Product
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-312017-03-252016-12-312016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282012-12-292012-06-302012-03-312011-12-312011-06-252011-03-262010-12-25
Value7541000.07138000.06382000.05738000.05996000.06268000.06155000.05918000.06852000.07088000.08014000.04602000.04948000.04916000.04849000.05017000.05070000.04945000.04945000.04350000.05037000.05118000.05218000.04886000.05174000.05212000.05732000.06184000.04682000.04244000.04816000.05155000.04206000.06134000.06727000.06801000.06080000.06303000.05016000.0
Percentage of ProductWarrantyAccrual100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProductWarrantyAccrualClassifiedCurrent

us-gaap:ProductWarrantyAccrualClassifiedCurrent


Product
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-312016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282013-09-282013-06-292013-03-302012-12-292012-09-292012-06-302012-03-312011-12-312011-09-242011-06-252010-12-252009-12-26
Value6933000.06570000.06066000.05674000.05814000.06066000.05893000.05716000.06616000.06859000.07769000.04357000.04402000.04570000.04280000.04344000.04393000.04263000.03737000.03787000.04113000.04246000.03785000.03991000.03308000.04539000.06184000.04963000.04582000.04914000.05252000.05106000.05811000.05340000.04692000.05600000.06134000.06727000.06801000.06284000.06080000.05016000.03747000.0
Percentage of ProductWarrantyAccrualClassifiedCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProductWarrantyAccrualNoncurrent us-gaap:BalanceSheetLocation

us-gaap:ProductWarrantyAccrualNoncurrent

cohu:NoncurrentOtherAccruedLiabilities


Product
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-312016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272014-12-27
Value600000.0600000.0300000.0100000.0200000.0200000.0300000.0200000.0200000.0200000.0200000.0200000.0500000.0300000.0600000.0700000.0700000.0700000.0600000.01300000.01000000.01000000.01100000.01200000.01900000.01100000.0
Percentage of ProductWarrantyAccrualNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RestructuringReserve us-gaap:RestructuringCostAndReserve, us-gaap:RestructuringPlan

us-gaap:RestructuringReserve

cohu:EmployeeSeveranceAndOtherExitCosts, cohu:IntegrationProgram


Restructuring
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-29
Value1566000.04194000.05826000.07000.0376000.0219000.01236000.04805000.08174000.03754000.04026000.0
Percentage of RestructuringReserve100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EmployeeSeverance, cohu:IntegrationProgram


Restructuring
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-29
Value1566000.04194000.05826000.07000.07000.0219000.01236000.04805000.08174000.03754000.04026000.0
Percentage of RestructuringReserve100.0100.0100.0100.01.9100.0100.0100.0100.0100.0100.0

us-gaap:RevenueRemainingPerformanceObligation

us-gaap:RevenueRemainingPerformanceObligation


Revenue
Period End2021-06-262021-03-272020-12-262020-09-262019-12-282018-12-29
Value8.08.2178.710.019
Percentage of RevenueRemainingPerformanceObligation100.0100.0100.0100.0100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber

cohu:EquityBasedPerformanceStockUnits


Share
Period End2020-12-262019-12-282018-12-292017-12-302017-06-242017-03-252016-12-312016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282012-12-29
Value425000.0364000.0340000.0334000.0357330.0352060.0403000.0403740.0398120.0379150.0376000.0376370.0376370.0404870.0334000.0333880.0333880.0368880.0238000.0122000.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RestrictedStockUnitsRSU


Share
Period End2020-12-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-252016-12-312016-09-242016-06-252016-03-262015-12-262015-09-262015-06-272015-03-282014-12-272014-09-272014-06-282014-03-292013-12-282012-12-292011-12-312010-12-25
Value1414000.01565900.01575000.01328000.01331400.01539100.01477100.01265000.0800860.0808090.0812640.0981000.01014100.01017900.01105100.01083000.01115400.01138300.01108700.01078000.01097400.01112500.01169700.01026000.01101200.01109300.01131900.0887000.0615000.0299000.0373000.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber332.70.00.0364.80.00.00.0372.10.00.00.0293.70.0284.9313.9268.7276.3285.9292.4286.7291.6295.6288.9307.2329.8332.2306.8372.7504.10.00.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber


Share
Period End2020-12-262019-12-282018-12-292017-12-302016-12-312015-12-262014-12-272013-12-282012-12-292011-12-312010-12-25
Value262000.0363000.0405000.0469000.01537000.01673000.01901000.02195000.02209000.02112000.01857000.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions

us-gaap:ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions


Share
Period End2020-12-26
Value262000.0
Percentage of ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions100.0

us-gaap:ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions us-gaap:ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRange

cohu:Range1


Share
Period End2020-12-26
Value159000.0
Percentage of ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions60.7

cohu:Range2


Share
Period End2020-12-26
Value92000.0
Percentage of ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions35.1

cohu:Range3


Share
Period End2020-12-26
Value11000.0
Percentage of ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions4.2

us-gaap:ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions

us-gaap:ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions


Share
Period End2020-12-26
Value262000.0
Percentage of ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions100.0

us-gaap:ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions us-gaap:ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRange

cohu:Range1


Share
Period End2020-12-26
Value159000.0
Percentage of ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions60.7

cohu:Range2


Share
Period End2020-12-26
Value92000.0
Percentage of ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions35.1

cohu:Range3


Share
Period End2020-12-26
Value11000.0
Percentage of ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions4.2

us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueOutstanding us-gaap:AwardType

us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueOutstanding

us-gaap:PerformanceShares


Sharebased
Period End2021-06-262021-03-272020-09-262020-06-272020-03-282019-09-282019-06-292019-03-302018-09-292018-06-302018-03-312017-09-30
Value13167.17.16.14.95.76.68.58.37.86.2
Percentage of SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RestrictedStockUnitsRSU


Sharebased
Period End2021-06-262021-03-272020-09-262020-06-272020-03-282019-09-282019-06-292019-03-302018-09-292018-06-302018-03-312017-09-302017-06-242017-03-252016-09-242016-06-252016-03-26
Value3949242520172325201918171719121212
Percentage of SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueOutstanding291.0301.8347.9353.5337.7363.3419.3381.8236.5238.6237.2285.50.00.00.00.00.0

us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1

us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1


Sharebased
Period End2021-06-262021-03-272020-12-262020-09-26
Value1200000.02200000.07500000.02300000.0
Percentage of SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1100.0100.0100.0100.0

us-gaap:ShortTermBankLoansAndNotesPayable

us-gaap:ShortTermBankLoansAndNotesPayable


Short
Period End2021-06-262021-03-272020-12-262020-09-262020-06-272020-03-282019-12-282019-09-282019-06-292019-03-302018-12-292018-09-292018-06-302018-03-312017-12-302017-09-302017-06-242017-03-25
Value3160000.05018000.05314000.05209000.04665000.03244000.03195000.03241000.03244000.03160000.03115000.03080000.03160000.03293000.03108000.03130000.03172000.03178000.0
Percentage of ShortTermBankLoansAndNotesPayable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:TaxCreditCarryforwardAmount us-gaap:IncomeTaxAuthority

us-gaap:TaxCreditCarryforwardAmount

us-gaap:DomesticCountry


Tax
Period End2020-12-262019-12-282018-12-292017-12-302016-12-312015-12-26
Value1111137.68.26.7
Percentage of TaxCreditCarryforwardAmount100.0100.0100.0100.0100.0100.0

us-gaap:StateAndLocalJurisdiction


Tax
Period End2020-12-262019-12-282018-12-292017-12-302016-12-312015-12-26
Value323153141313
Percentage of TaxCreditCarryforwardAmount285.2274.8396.3185.5165.9203.0

us-gaap:UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued

us-gaap:UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued


Unrecognized
Period End2020-12-262019-12-282018-12-292017-12-302016-12-312015-12-262014-12-272013-12-282012-12-292011-12-31
Value1000000.01300000.01500000.01100000.01200000.01400000.01400000.01500000.0400000.0400000.0
Percentage of UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate

us-gaap:UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate


Unrecognized
Period End2020-12-262019-12-282018-12-292017-12-302016-12-312015-12-262014-12-272013-12-282012-12-292011-12-31
Value5700000.07000000.08200000.04300000.05200000.05600000.06200000.06200000.02500000.03100000.0
Percentage of UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ValuationAllowancesAndReservesBalance us-gaap:ValuationAllowancesAndReservesType

us-gaap:ValuationAllowancesAndReservesBalance

us-gaap:AllowanceForCreditLoss


Valuation
Period End2020-12-262019-12-282018-12-292017-12-302016-12-312015-12-26
Value0.1280.0090.040.20.0810.071
Percentage of ValuationAllowancesAndReservesBalance100.0100.0100.0100.0100.0100.0

us-gaap:InventoryValuationReserve


Valuation
Period End2020-12-262019-12-282018-12-292017-12-302016-12-312015-12-262014-12-272013-12-282012-12-292011-12-312010-12-252009-12-26
Value262023212126293828252325
Percentage of ValuationAllowancesAndReservesBalance21044.5232866.759845.010594.026524.737539.40.00.00.00.00.00.0

Line plots across dimensions of each concept


TTM Greenblatt ROC
_
(None,)
T T M  Greenblatt  R O C_
us-gaap:AllocatedShareBasedCompensationExpense
us-gaap:IncomeStatementLocation
(None,)
Allocated Share Based Compensation Expenseus-gaap: Income Statement Location
us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax
us-gaap:StatementGeographical
(None,)
Revenue From Contract With Customer Including Assessed Taxus-gaap: Statement Geographical
us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax
us-gaap:StatementBusinessSegments
(None,)
Revenue From Contract With Customer Including Assessed Taxus-gaap: Statement Business Segments
us-gaap:Assets
us-gaap:StatementBusinessSegments
(None,)
Assetsus-gaap: Statement Business Segments
us-gaap:StockholdersEquity
us-gaap:StatementEquityComponents
(None,)
Stockholders Equityus-gaap: Statement Equity Components
us-gaap:PropertyPlantAndEquipmentGross
us-gaap:PropertyPlantAndEquipmentByType
(None,)
Property Plant And Equipment Grossus-gaap: Property Plant And Equipment By Type
us-gaap:PropertyPlantAndEquipmentNet
us-gaap:StatementGeographical
(None,)
Property Plant And Equipment Netus-gaap: Statement Geographical
us-gaap:Goodwill
us-gaap:ReportingUnit
(None,)
Goodwillus-gaap: Reporting Unit
us-gaap:IntangibleAssetsNetIncludingGoodwill
us-gaap:StatementGeographical
(None,)
Intangible Assets Net Including Goodwillus-gaap: Statement Geographical
us-gaap:LongTermDebtCurrent
us-gaap:DebtInstrument
(None,)
Long Term Debt Currentus-gaap: Debt Instrument
us-gaap:LongTermDebt
us-gaap:DebtInstrument
(None,)
Long Term Debtus-gaap: Debt Instrument
us-gaap:StockholdersEquity
us-gaap:StatementEquityComponents
(None,)
Stockholders Equityus-gaap: Statement Equity Components
us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
us-gaap:StatementEquityComponents
(None,)
Stockholders Equity Including Portion Attributable To Noncontrolling Interestus-gaap: Statement Equity Components
us-gaap:StockIssuedDuringPeriodValueNewIssues
us-gaap:StatementEquityComponents
(None,)
Stock Issued During Period Value New Issuesus-gaap: Statement Equity Components
us-gaap:DebtInstrumentInterestRateStatedPercentage
us-gaap:Range, us-gaap:DebtInstrument
(None, 'cohu:KitaTermLoans')
Debt Instrument Interest Rate Stated Percentageus-gaap: Range, us-gaap: Debt Instrument
us-gaap:DebtInstrumentInterestRateStatedPercentage
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
(None, 'us-gaap:ConstructionLoans')
Debt Instrument Interest Rate Stated Percentageus-gaap: Debt Instrument, us-gaap: Longterm Debt Type