ZEN


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

Table of contents



us-gaap:CommonStockValue
us-gaap:StatementEquityComponents
us-gaap:SharesOutstanding

us-gaap:CommonStockSharesIssued

us-gaap:CommonStockSharesOutstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic

us-gaap:WeightedAverageNumberOfShareOutstandingBasicAndDiluted

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecurities

us-gaap:EarningsPerShareBasic

us-gaap:EarningsPerShareDiluted

us-gaap:EarningsPerShareBasicAndDiluted
us-gaap:AwardType, us-gaap:PlanName
us-gaap:AllocatedShareBasedCompensationExpense

us-gaap:ComprehensiveIncomeNetOfTax

us-gaap:CostOfRevenue

us-gaap:GainsLossesOnExtinguishmentOfDebt

us-gaap:GeneralAndAdministrativeExpense

us-gaap:GrossProfit

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest

us-gaap:IncomeTaxExpenseBenefit

us-gaap:IncomeTaxesPaidNet

us-gaap:InterestExpense
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:InterestExpenseDebt

us-gaap:InterestPaidNet

us-gaap:NetIncomeLoss
us-gaap:StatementEquityComponents

us-gaap:NonoperatingIncomeExpense

us-gaap:OperatingExpenses

us-gaap:OperatingIncomeLoss

us-gaap:OtherComprehensiveIncomeLossNetOfTax
us-gaap:StatementEquityComponents

us-gaap:OtherNonoperatingIncomeExpense

us-gaap:ResearchAndDevelopmentExpense

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax
us-gaap:StatementGeographical

us-gaap:Revenues

us-gaap:SellingAndMarketingExpense

us-gaap:Assets

us-gaap:Liabilities

us-gaap:LiabilitiesAndStockholdersEquity

us-gaap:StockholdersEquity
us-gaap:CumulativeEffectPeriodOfAdoption, us-gaap:StatementEquityComponents
us-gaap:DerivativeInstrumentRisk, us-gaap:StatementEquityComponents
us-gaap:StatementEquityComponents

us-gaap:AssetsCurrent

us-gaap:CashAndCashEquivalentsAtCarryingValue

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

us-gaap:MarketableSecuritiesCurrent

us-gaap:AccountsReceivableNetCurrent

us-gaap:PrepaidExpenseAndOtherAssetsCurrent

us-gaap:NoncurrentAssets
us-gaap:StatementGeographical

us-gaap:PropertyPlantAndEquipmentGross
us-gaap:PropertyPlantAndEquipmentByType

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment

us-gaap:AmortizationOfIntangibleAssets

us-gaap:PropertyPlantAndEquipmentNet

us-gaap:Goodwill

us-gaap:FiniteLivedIntangibleAssetsNet
us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:IntangibleAssetsNetIncludingGoodwill

us-gaap:DeferredTaxAssetsLiabilitiesNet

us-gaap:OperatingLeaseRightOfUseAsset

us-gaap:OtherAssetsNoncurrent

us-gaap:AccountsPayableCurrent

us-gaap:AccruedLiabilitiesCurrent

us-gaap:ContractWithCustomerLiabilityCurrent

us-gaap:LiabilitiesCurrent

us-gaap:OperatingLeaseLiabilityCurrent

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

us-gaap:LongTermDebtNoncurrent

us-gaap:OtherLiabilitiesNoncurrent

us-gaap:OperatingLeaseLiabilityNoncurrent

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive

us-gaap:OperatingLeaseLiability

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount

us-gaap:StockholdersEquity
us-gaap:CumulativeEffectPeriodOfAdoption, us-gaap:StatementEquityComponents
us-gaap:DerivativeInstrumentRisk, us-gaap:StatementEquityComponents
us-gaap:StatementEquityComponents

us-gaap:CommonStockValue

us-gaap:AdditionalPaidInCapitalCommonStock

us-gaap:RetainedEarningsAccumulatedDeficit

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue
us-gaap:StatementEquityComponents

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:AmortizationOfFinancingCosts

us-gaap:DepreciationDepletionAndAmortization

us-gaap:IncreaseDecreaseInAccountsPayable

us-gaap:IncreaseDecreaseInAccountsReceivable

us-gaap:IncreaseDecreaseInOtherOperatingCapitalNet

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetIncomeLoss
us-gaap:StatementEquityComponents

us-gaap:ShareBasedCompensation
us-gaap:IncomeStatementLocation

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod

us-gaap:DeferredTaxLiabilities

us-gaap:DeferredTaxAssetsNet

us-gaap:UnrecognizedTaxBenefits

us-gaap:DeferredTaxAssetsValuationAllowance

us-gaap:AdjustmentsToAdditionalPaidInCapitalConvertibleDebtWithConversionFeature
us-gaap:StatementEquityComponents
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:AmortizationOfDebtDiscountPremium

us-gaap:AmortizationOfFinancingCostsAndDiscounts

us-gaap:AvailableForSaleDebtSecuritiesGrossUnrealizedGain

us-gaap:CapitalExpendituresIncurredButNotYetPaid

us-gaap:CapitalizedComputerSoftwareAmortization1

us-gaap:CapitalizedContractCostAmortization

us-gaap:ContractWithCustomerLiabilityRevenueRecognized
us-gaap:ProductOrService
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:DebtInstrumentConvertibleConversionRatio1

us-gaap:Depreciation

us-gaap:EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents
us-gaap:BalanceSheetLocation
us-gaap:EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount

us-gaap:GoodwillOtherIncreaseDecrease
us-gaap:IncomeStatementLocation
us-gaap:ImpairmentOfLeasehold

us-gaap:IncreaseDecreaseInAccruedLiabilities

us-gaap:IncreaseDecreaseInContractWithCustomerLiability

us-gaap:IncreaseDecreaseInEmployeeRelatedLiabilities

us-gaap:IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets
us-gaap:DebtInstrument
us-gaap:IncrementalCommonSharesAttributableToConversionOfDebtSecurities

us-gaap:OperatingLeaseCost

us-gaap:OperatingLeasePayments

us-gaap:OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax

us-gaap:OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationBeforeTax
us-gaap:DerivativeInstrumentRisk
us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTax
us-gaap:DerivativeInstrumentRisk, us-gaap:IncomeStatementLocation
us-gaap:DerivativeInstrumentRisk
us-gaap:OtherComprehensiveIncomeLossDerivativeExcludedComponentIncreaseDecreaseBeforeAdjustmentsTax

us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent

us-gaap:OtherComprehensiveIncomeLossTaxPortionAttributableToParent1

us-gaap:OtherOperatingActivitiesCashFlowStatement

us-gaap:PaymentsRelatedToTaxWithholdingForShareBasedCompensation

us-gaap:PaymentsToAcquireAvailableForSaleSecuritiesDebt

us-gaap:PaymentsToDevelopSoftware

us-gaap:ProceedsFromConvertibleDebt

us-gaap:ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities

us-gaap:ProceedsFromSaleOfAvailableForSaleSecuritiesDebt

us-gaap:ProceedsFromStockOptionsExercised

us-gaap:ProceedsFromStockPlans

us-gaap:RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod
us-gaap:AwardType, us-gaap:PlanName
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfAdditionalSharesAuthorized
us-gaap:AwardType, us-gaap:PlanName
us-gaap:AwardType, us-gaap:PlanName, us-gaap:SubsequentEventType
us-gaap:AwardType, us-gaap:SubsequentEventType
us-gaap:SubsidiarySaleOfStock

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
us-gaap:SubsidiarySaleOfStock
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardSharesIssuedInPeriod

us-gaap:ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice

us-gaap:ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice

us-gaap:ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice
us-gaap:AwardType
us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueVested

us-gaap:ShortTermLeaseCost
us-gaap:StatementEquityComponents
us-gaap:StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans

us-gaap:StockIssuedDuringPeriodSharesStockOptionsExercised
us-gaap:StatementEquityComponents

us-gaap:StockIssuedDuringPeriodValueEmployeeStockPurchasePlan
us-gaap:StatementEquityComponents

us-gaap:StockIssuedDuringPeriodValueStockOptionsExercised
us-gaap:StatementEquityComponents

us-gaap:StockholdersEquityOther
us-gaap:StatementEquityComponents

us-gaap:SubleaseIncome

us-gaap:VariableLeaseCost

zen:AccountsReceivableCreditLossExpenseReversalCurrent

zen:AdjustmentsToAdditionalPaidInCapitalProceedsFromCappedCallTransactions
us-gaap:StatementEquityComponents

zen:AdjustmentsToAdditionalPaidInCapitalPurchaseOfCappedCallTransactions
us-gaap:StatementEquityComponents

zen:AdjustmentsToAdditionalPaidInCapitalRepurchaseOfConvertibleDebtWithConversionFeature
us-gaap:StatementEquityComponents

zen:ContractwithCustomerLiabilityBillings

zen:ContractwithCustomerLiabilityOtherRevenueRecognized

zen:IncreaseDecreaseInCapitalizedContractCost

zen:IncreaseDecreaseInOperatingLeaseLiability

zen:IncreaseDecreaseInOperatingLeaseRightOfUseAsset
us-gaap:StatementEquityComponents
zen:IssuanceOfCommonStockForSettlementOfRestrictedStockUnitShares

zen:IssuanceOfCommonStockForSettlementOfRestrictedStockUnitsValue
us-gaap:StatementEquityComponents

zen:PaymentsForCappedCall

zen:PaymentsForLeaseTermination
us-gaap:SubsequentEventType

zen:PaymentsToAcquireEquitySecuritiesWithoutReadilyDeterminableFairValue

zen:ProceedsFromCappedCall

zen:ProceedsFromSaleOfEquitySecuritiesWithoutReadilyDeterminableFairValue

zen:PropertyAndEquipmentAcquiredThroughTenantImprovementAllowance

zen:RealizedGainsLossesFromSaleOfEquitySecuritiesWithoutReadilyDeterminableFairValue
us-gaap:AwardType
zen:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedAndUnavailableForGrantInPeriod
us-gaap:AwardType
zen:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedAndUnavailableForGrantWeightedAverageGrantDateFairValue
us-gaap:AwardType
zen:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedOrCanceledInPeriod
us-gaap:AwardType
zen:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedOrCanceledWeightedAverageGrantDateFairValue

zen:ShareBasedCompensationArrangementByShareBasedPaymentAwardRestrictedStockUnitsForfeitedFromSharesAvailableForGrant
us-gaap:AwardType

zen:ShareBasedCompensationArrangementByShareBasedPaymentAwardRestrictedStockUnitsGrantedFromSharesAvailableForGrant

zen:ShareBasedCompensationArrangementByShareBasedPaymentAwardSharesForfeitedFromSharesAvailableForGrant

zen:ShareBasedCompensationArrangementByShareBasedPaymentAwardSharesGrantedFromSharesAvailableForGrant

us-gaap:AllowanceForDoubtfulAccountsReceivable

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

us-gaap:AvailableForSaleDebtSecuritiesAmortizedCostBasis

us-gaap:CapitalizedComputerSoftwareNet

us-gaap:CapitalizedContractCostNet

us-gaap:CapitalizedContractCostNetCurrent

us-gaap:CapitalizedContractCostNetNoncurrent
us-gaap:FairValueByMeasurementFrequency
us-gaap:CashAndCashEquivalentsFairValueDisclosure

us-gaap:ContractWithCustomerLiability

us-gaap:ContractWithCustomerLiabilityNoncurrent

us-gaap:ContractualObligation
us-gaap:ProductOrService
us-gaap:ProductOrService, us-gaap:SubsequentEventType

us-gaap:ContractualObligationDueAfterFifthYear

us-gaap:ContractualObligationDueInFifthYear

us-gaap:ContractualObligationDueInFourthYear

us-gaap:ContractualObligationDueInNextTwelveMonths

us-gaap:ContractualObligationDueInSecondYear

us-gaap:ContractualObligationDueInThirdYear

us-gaap:ConvertibleDebtCurrent
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:DebtInstrumentCarryingAmount
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:DebtInstrumentConvertibleCarryingAmountOfTheEquityComponent
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:DebtInstrumentFaceAmount
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:DebtInstrumentInterestRateEffectivePercentage
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:DebtInstrumentUnamortizedDiscountPremiumNet

us-gaap:DebtSecuritiesAvailableForSaleAccruedInterestAfterAllowanceForCreditLoss

us-gaap:DebtSecuritiesAvailableForSaleUnrealizedLossPosition

us-gaap:DeferredTaxAssetsGross

us-gaap:DeferredTaxAssetsOperatingLossCarryforwards

us-gaap:DeferredTaxAssetsOperatingLossCarryforwardsNotSubjectToExpiration

us-gaap:DeferredTaxAssetsOperatingLossCarryforwardsSubjectToExpiration

us-gaap:DeferredTaxAssetsOther

us-gaap:DeferredTaxAssetsPropertyPlantAndEquipment

us-gaap:DeferredTaxAssetsTaxCreditCarryforwards

us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost

us-gaap:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccruals

us-gaap:DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets
us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:HedgingDesignation
us-gaap:DerivativeAssets
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:HedgingDesignation
us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:HedgingDesignation
us-gaap:DerivativeLiabilities
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:HedgingDesignation
us-gaap:DerivativeInstrumentRisk
us-gaap:DerivativeNotionalAmount

us-gaap:EmployeeRelatedLiabilitiesCurrent

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized

us-gaap:EquitySecuritiesWithoutReadilyDeterminableFairValueAmount

us-gaap:FiniteLivedIntangibleAssetsAccumulatedAmortization
us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFive

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFour

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearThree

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo

us-gaap:FiniteLivedIntangibleAssetsGross
us-gaap:FiniteLivedIntangibleAssetsByMajorClass
us-gaap:DerivativeInstrumentRisk
us-gaap:ForeignCurrencyCashFlowHedgeGainLossToBeReclassifiedDuringNext12Months

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths

us-gaap:LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear

us-gaap:LettersOfCreditOutstandingAmount
us-gaap:DebtInstrument, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:LongtermDebtType
us-gaap:LongTermDebtFairValue

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo

us-gaap:MarketableSecurities
us-gaap:FairValueByMeasurementFrequency

us-gaap:MarketableSecuritiesNoncurrent

us-gaap:OperatingLeaseWeightedAverageDiscountRatePercent
us-gaap:BusinessAcquisition
us-gaap:OperatingLossCarryforwards
us-gaap:IncomeTaxAuthority
us-gaap:StatementGeographical

us-gaap:PurchaseObligation

us-gaap:PurchaseObligationDueInNextTwelveMonths

us-gaap:PurchaseObligationDueInSecondYear

us-gaap:PurchaseObligationDueInThirdYear

us-gaap:RestrictedCashAndCashEquivalents

us-gaap:RestrictedCashCurrent

us-gaap:RestrictedCashNoncurrent

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

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant
us-gaap:AwardType, us-gaap:PlanName
us-gaap:SubsidiarySaleOfStock

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue

us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueOutstanding

us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1
us-gaap:IncomeTaxAuthority, us-gaap:TaxCreditCarryforward
us-gaap:TaxCreditCarryforwardAmount
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:UnamortizedDebtIssuanceExpense

us-gaap:UndistributedEarningsOfForeignSubsidiaries
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
zen:DebtInstrumentCappedCallTransactionSharesCoveredByCapCall
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
zen:DebtInstrumentConvertibleCarryingAmountOfEquityComponentNet
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
zen:DebtInstrumentConvertibleEquityComponentUnamortizedDiscountIssuanceCosts

zen:DeferredTaxAssetsDisallowedInterest

zen:DeferredTaxAssetsOperatingLeaseLiability

zen:DeferredTaxLiabilitiesDeferredCommissions

zen:DeferredTaxLiabilitiesDeferredExpensesConvertibleDebt

zen:DeferredTaxLiabilitiesOperatingLeaseRightOfUseAssets

zen:FiniteLivedIntangibleAssetExpectedAmortizationAfterYearFour

zen:InternalUseSoftwareIncludedInConstructionInProgress

zen:LesseeLeasePaymentsDue

zen:LesseeLeasePaymentsDueAfterYearFive

zen:LesseeLeasePaymentsDueYearFive

zen:LesseeLeasePaymentsDueYearFour

zen:LesseeLeasePaymentsDueYearThree

zen:LesseeLeasePaymentsDueYearTwo

zen:LesseeLeasePaymentsYearOne

zen:LesseeOperatingLeaseLeaseNotYetCommencedUndiscountedAmount

zen:LesseeOperatingLeaseLiabilityToBePaidAfterYearFour

zen:SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsExpectedToVestOutstanding

zen:SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsExpectedToVestOutstandingAggregateIntrinsicValue

Plots across concepts


IncomeStatement
Comprehensive Income Net Of Tax
Expenses
Other Nonoperating Income Expense
Balance Sheet
Finite Lived Intangible Assets Net
Assets
Operating Lease Right Of Use Asset
Current Assets
Prepaid Expense And Other Assets Current
NonCurrent Assets
Finite Lived Intangible Assets Net
PropertyPlantAndEquipmentNet
Property Plant And Equipment Net
Liabilities
Operating Lease Liability
Current Liabilities
Operating Lease Liability Current
Noncurrent Liabilities
Other Liabilities Noncurrent
Stockholders Equity
Retained Earnings Accumulated Deficit
CashFlow
Net Income Loss
NetCashProvidedByUsedInOperatingActivities
Net Income Loss
NetCashProvidedByUsedInInvestingActivities
Net Cash Provided By Used In Investing Activities
Shares
Weighted Average Number Of Share Outstanding Basic And Diluted
OperatingLeaseLiability
Operating Lease Liability Current
NonoperatingIncomeExpense
Nonoperating Income Expense
LesseeOperatingLeaseLiabilityPaymentsDue
Lessee Operating Lease Liability Payments Remainder Of Fiscal Year
FiniteLivedIntangibleAssets
Finite Lived Intangible Assets Accumulated Amortization
AccountsReceivable
Allowance For Doubtful Accounts Receivable Current

Tables

  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-30
us-gaap:CommonStockValue ████▇▇▇▇▇▆▆▆▆▆▆▅▅▅▅▄▄▄▄▃▃▃▂▁▁1.1971.1831.1741.1641.1511.1391.131.1191.1061.0921.081.0661.0561.0421.0311.011.0070.9910.9710.9530.9370.9170.9050.8870.880.8590.7550.7210.715NA0.229NANA
 us-gaap:SharesOutstanding us-gaap:StatementEquityComponents us-gaap:CommonStock█▇▇▇▆▆▅▅▄▄▃▂▂▁▁119.789118.358117.489116.463115.186113.976113.081111.917110.698109.26108.038106.627105.683104.263103.121NANANA97.195NANANA90.861NANANA76.134NANANA23.71NANA
us-gaap:CommonStockSharesIssued ███▇▇▇▇▇▇▆▆▆▆▆▆▅▅▅▅▄▄▄▄▃▃▃▁▁▁119.8118.4117.5116.4115.2114.0113.1111.9110.7109.3108.0106.6105.7104.3103.1101.1100.799.297.295.493.992.090.989.188.386.476.173.372.8NA23.7NANA
us-gaap:CommonStockSharesOutstanding ███▇▇▇▇▆▆▆▆▆▆▆▆▅▅▅▅▄▄▄▄▃▃▃▁▁▁119.8118.4117.5116.4115.2114.0113.1108.0108.0108.0108.0103.1103.1103.1103.1101.1100.298.796.794.993.491.590.388.587.885.975.572.872.3NA23.2NANA
us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding 119.05NANANA114.6NANANANANANANANANANANANANANANANA90.519NA87.77786.3976.338NA71.73245.7622.762NA22.02421.568
us-gaap:WeightedAverageNumberOfSharesOutstandingBasic 119.05NANANA114.6NANANANANANANANANANANANANANANANA90.519NA87.77786.3976.338NA71.73245.7622.762NA22.02421.568
us-gaap:WeightedAverageNumberOfShareOutstandingBasicAndDiluted NA117.912NA115.809114.6113.538NA111.261109.986108.63NA106.143105.0103.692NA100.65999.50697.475NA94.08592.17490.519NA87.77786.3976.338NA71.73245.7622.762NA22.02421.568
us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount NA13.842NANANA13.024NANANA14.478NANANA14.414NANANA14.164NANANA17.467NANANA16.835NANANA51.77NANANA
 us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecurities us-gaap:RestrictedStockUnitsRSUNA5.37NANANA5.846NANANA7.028NANANA7.768NANANA6.517NANANA6.967NANANA4.319NANANA2.657NANANA
 us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecurities zen:CommonStockOptionsAndEmployeeStockPurchasePlanNA4.601NANANA5.429NANANA6.167NANANA6.646NANANA7.647NANANA10.5NANANA12.637NANANANANANANA
 us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecurities zen:ConvertibleSeniorNotesNA3.871NANANA1.749NANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:EarningsPerShareBasic -0.49NANANA-0.56NANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:EarningsPerShareDiluted -0.49NANANA-0.56NANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:EarningsPerShareBasicAndDiluted NA-0.42-0.5999999999999999-0.35-0.56-0.38-0.32000000000000006-0.31-0.5-0.41-0.30999999999999994-0.32-0.33-0.28-0.2600000000000001-0.28-0.29-0.28-0.2500000000000001-0.27-0.28-0.3-0.28-0.22-0.25-0.25-0.17999999999999994-0.25-0.48-0.45-0.27-0.22-0.3
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-30
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-30
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-30
 us-gaap:AllocatedShareBasedCompensationExpense us-gaap:AwardType,us-gaap:PlanName us-gaap:PerformanceShares,zen:PSURetentionPlan▁▃▃█▃▃▃▆█▃0.01.01.03.01.01.01.02.03.01.0NANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:ComprehensiveIncomeNetOfTax ▂▂▁▄▃▃▅▅▃▄▅▅▅▅▆▆▅▆▅▆▅▆▆▆▆▆▇▇▆▇███-59.294-56.497-69.393-40.977-51.67-53.526-34.53-36.043-51.439-41.326-33.176-34.142-36.403-30.715-26.817-27.421-27.988-25.589-28.015-25.733-29.324-23.699-25.124-19.767-21.287-19.568-17.982-18.28-21.627-10.063-6.096-4.734-6.362
us-gaap:CostOfRevenue █▇█▇▇▇▇▇▇▇▆▆▅▅▄▄▄▄▃▃▃▃▃▂▂▂▂▂▂▁▁▁▁66.74360.89467.21962.81961.51559.70261.74859.2157.6755.65451.04846.99244.1639.05634.95833.69330.66328.10725.58223.86622.93621.51619.69317.03916.16214.2913.63711.68411.7318.9957.6536.3275.681
us-gaap:GainsLossesOnExtinguishmentOfDebt NANA0.00.0-25.95NANANA0.0NANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:GeneralAndAdministrativeExpense ▇▆█▆▅▅▅▅▆▅▄▄▄▃▃▃▃▃▃▃▃▃▂▂▂▂▂▂▂▁▁▁▁45.81843.13357.04238.85436.24734.32633.94132.86443.01931.25329.68227.35724.24522.20722.17821.39819.78818.31716.22216.21216.07615.86113.9212.31911.53610.1279.238.948.3156.3844.6933.6465.14
us-gaap:GrossProfit ██▇▆▆▆▆▅▅▄▄▄▄▃▃▃▃▃▃▂▂▂▂▂▂▂▁▁▁▁▁▁▁251.473237.154216.279199.107185.149177.773168.123151.267136.913125.83121.197107.83697.72290.73588.46879.09370.6164.963.04156.85151.26446.94342.95338.62232.06527.94424.90422.22617.77516.09714.84812.9110.715
us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest ▃▄▁▅▂▅▆▆▃▄▅▅▅▆▇▇▆▇▇▇▇▇▇█▇███▇-56.052-46.611-69.052-38.73-63.368-41.267-35.479-34.588-53.95-44.286-38.065-36.478-36.033-32.615-27.382-27.822-29.996-26.956-24.356-25.532-26.162-26.757-24.693-18.662-21.283-19.075-17.484-18.155-21.828NANANANA
us-gaap:IncomeTaxExpenseBenefit ██▇█▇▇▆▅▆▆▁▃▄▂▅▆▅▆▆▆▆▆▅▆▆▆▆▅▆▆▆▆▆2.3552.3540.9841.9731.2881.5160.689-0.3640.5910.434-4.807-2.334-1.667-3.3-0.732-0.133-0.690.0380.1930.2940.0920.414-0.2160.2620.1990.0930.009-0.236-0.0850.0490.1010.0420.058
us-gaap:IncomeTaxesPaidNet █▇▇▄▄▃▄▅▅▃▁▄▃▃3.082.4162.7911.1441.2920.6571.3681.7941.5190.7-0.2451.2240.6270.918NANANANANANANANANANANANANANANANANANANA
us-gaap:InterestExpense ████▂▁▁▁▁▁14.59114.41514.25914.0878.0866.8876.8236.7276.6146.544NANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:InterestExpenseDebt us-gaap:DebtInstrument,us-gaap:LongtermDebtType zen:ConvertibleSeniorNotesDue2023,us-gaap:ConvertibleDebt▃▃▃▃▇████████▂▁▁▁▁0.0930.0930.0930.0930.3180.3590.360.3590.3590.3560.3540.360.3590.0440.00.00.00.0NANANANANANANANANANANANANANANA
 us-gaap:InterestExpenseDebt us-gaap:DebtInstrument,us-gaap:LongtermDebtType zen:ConvertibleSeniorNotesDue2025,us-gaap:ConvertibleDebt████▁1.7971.7971.7971.7970.28NANANA0.0NANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:InterestPaidNet █▁█▁▂▂▁▂▁▂▁▂▁▁3.5940.1863.5740.1860.2690.7190.00.7190.00.7190.00.6990.00.0NANANANANANANANANANANANANANANANANANANA
us-gaap:NetIncomeLoss ▂▃▁▄▂▄▅▅▃▄▅▅▅▅▆▆▅▆▆▆▆▆▆▆▆▆▇▇▆▇███-58.407-48.965-70.036-40.703-64.656-42.783-36.168-34.224-54.541-44.72-33.249-34.144-34.366-29.325-26.65-27.689-29.306-26.994-24.549-25.826-26.254-27.171-24.477-18.924-21.482-19.168-17.493-17.919-21.743-10.259-6.106-4.755-6.352
 us-gaap:NetIncomeLoss us-gaap:StatementEquityComponents us-gaap:RetainedEarnings▃▅▁▆▂▆▇▇▄▅▇▇▇█-58.407-48.965-70.036-40.703-64.656-42.783-36.168-34.224-54.541-44.72-33.249-34.144-34.366-29.325NANANANANANANANANANANANANANANANANANANA
us-gaap:NonoperatingIncomeExpense ▅▆▅▆▁█▇█▇█▇▇▇████-13.631-9.331-14.258-10.404-31.870.017-3.1780.84-2.588-0.372-1.548-2.277-2.4361.01.1420.6190.508NANANANANANANANANANANANANANANANA
us-gaap:OperatingExpenses ██▇▆▆▆▆▅▅▅▅▄▄▄▄▃▃▃▃▃▃▂▂▂▂▂▂▂▂▁▁▁▁293.894274.434271.073227.433216.647219.057200.424186.695188.275169.744157.714142.037131.319124.35116.992107.534101.11492.07488.17283.06477.5673.6367.34557.42953.00546.78942.10740.03839.15325.84920.64817.52116.876
us-gaap:OperatingIncomeLoss ▃▃▁▅▄▃▄▄▁▃▄▄▄▄▅▅▄▅▅▅▅▅▅▆▆▆▆▆▆▇███-42.421-37.28-54.794-28.326-31.498-41.284-32.301-35.428-51.362-43.914-36.517-34.201-33.597-33.615-28.524-28.441-30.504-27.174-25.131-26.213-26.296-26.687-24.392-18.807-20.94-18.845-17.203-17.812-21.378-9.752-5.8-4.611-6.161
us-gaap:OtherComprehensiveIncomeLossNetOfTax ▄▂▄▄█▁▅▄▅▅▄▄▄▄-0.887-7.5320.643-0.27412.986-10.7431.638-1.8193.1023.3940.0730.002-2.037-1.39NANANANANANANANANANANANANANANANANANANA
 us-gaap:OtherComprehensiveIncomeLossNetOfTax us-gaap:StatementEquityComponents us-gaap:AccumulatedOtherComprehensiveIncome▄▂▄▄█▁▅▄▅▅▄▄▄▄-0.887-7.5320.643-0.27412.986-10.7431.638-1.8193.1023.3940.0730.002-2.037-1.39NANANANANANANANANANANANANANANANANANANA
us-gaap:OtherNonoperatingIncomeExpense ▃█▂▆▅▅▁▅▁▃▂▂▂▃▄▃▃▃▃▃▃▂▂▃▂▂▂▂▂▂▂▂▂0.965.0840.0013.6832.1662.334-1.1642.581-1.2680.7-0.273-0.4630.0271.01.1420.6190.5080.2180.7750.6810.134-0.07-0.3010.145-0.343-0.23-0.281-0.343-0.45-0.458-0.205-0.102-0.133
us-gaap:ResearchAndDevelopmentExpense █▇▇▆▆▆▆▆▅▅▅▄▄▄▃▃▃▃▃▃▃▃▂▂▂▂▂▂▂▁▁▁▁82.82673.78371.13464.84259.00360.42155.71954.52850.5146.79145.14240.4137.62437.08530.77929.35828.69826.45624.38422.95322.13421.59719.09816.03114.22713.25911.1769.5510.4995.1784.5513.863.528
us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax ██▇▇▆▆▆▆▅▅▅▄▄▄▃▃▃▃▃▂▂▂▂▂▂▂▂▁▁▁▁▁▁318.216298.048283.498261.926246.664237.475229.871210.477194.583181.484172.245154.828141.882129.791121.916112.265102.09693.88889.46880.71774.268.45962.64655.66148.22742.23438.54133.9129.50625.09222.50119.23716.396
us-gaap:Revenues ██▇▇▆▆▆▆▅▅▅▄▄▄▃▃▃▃▃▂▂▂▂▂▂▂▂▁▁▁▁▁▁318.216298.048283.498261.926246.664237.475229.871210.477194.583181.484172.245154.828141.882129.791123.426112.786101.27393.00788.62380.71774.268.45962.64655.66148.22742.23438.54133.9129.50625.09222.50119.23716.396
us-gaap:SellingAndMarketingExpense ██▇▆▆▆▆▅▅▅▄▄▄▄▃▃▃▃▃▃▂▂▂▂▂▂▂▂▂▁▁▁▁165.25157.518142.897123.737121.397124.31110.76499.30394.74691.782.8974.2769.4565.05864.03556.77852.62847.30147.56643.89939.3536.17234.32729.07927.24223.40321.70121.54820.33914.28711.40410.0158.208
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-30
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-30
us-gaap:Assets ███▇▇▅▅▅▅▅▅▄▄▄▂▂▂▂▂▂▂▂▂▂▂▂▁▁▁2249.0622175.1082157.2792054.2391996.0181488.791514.5891459.4581438.9971372.6781237.8791204.0641159.0851112.523560.204529.337509.642491.028475.285456.427439.941425.682422.686404.256393.423393.143205.788203.981203.312NA92.736NANA
us-gaap:Liabilities ███▇▇▅▅▅▅▅▄▄▄▄▂▂▁▁▁▁▁▁▁▁▁▁▁▁▁1784.9351744.8651725.4481624.121585.7091038.8471056.6051022.2691012.02953.733820.958799.287754.219711.87238.563223.167201.673185.631175.857157.893147.224135.831129.396111.62596.59394.87492.08289.35981.569NA67.643NANA
us-gaap:LiabilitiesAndStockholdersEquity ███▇▇▅▅▅▅▅▅▄▄▄▂▂▂▂▂▂▂▂▂▂▂▂▁▁▁2249.0622175.1082157.2792054.2391996.0181488.791514.5891459.4581438.9971372.6781237.8791204.0641159.0851112.523560.204529.337509.642491.028475.285456.427439.941425.682422.686404.256393.423393.143205.788203.981203.312NA92.736NANA
us-gaap:StockholdersEquity █▇▇▇▇██▇▇▇▇▇▇▇▅▅▅▅▅▅▅▅▅▅▅▅▁▁▁464.127430.243431.831430.119410.309449.943457.984437.189426.977418.945416.921404.777404.866400.653321.641306.17307.969305.397299.428298.534292.717289.851293.29292.631296.83298.269113.706114.622121.743NA-46.276NANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-30
us-gaap:AssetsCurrent ███▇█▄▄▄▄▄▄▄▅▅▂▂▂▂▂▂▂▂▂▂▂▂▁▁▁1255.8941238.661275.9731188.9291231.452653.122692.823616.708608.91600.335572.596589.161804.179837.14328.207302.345302.716304.785279.818268.429272.477290.4283.231314.658309.672327.125139.005128.407144.945NA73.859NANA
us-gaap:CashAndCashEquivalentsAtCarryingValue ▅▅▅▅█▃▃▃▂▂▂▂▆▇▂▂▂▂▂▂▂▃▃▃▃▃▂▂▂▁▁▁▁422.81378.363405.43383.318700.457199.092196.591190.892171.218142.418126.518157.158492.752609.229109.3792.603102.775109.25893.67777.589118.036217.791216.226255.386255.669264.22280.26580.436120.05450.85553.72529.36629.878
us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents ▅▄▅▄█▂▂▂▂▂▁▂▆▇▁▁▁▁▁423.248380.085407.859385.999704.116202.612199.897193.811173.381145.028128.876158.583494.397610.545110.88894.171104.512110.77695.062NANANA217.573NANANANANANANANANANA
us-gaap:MarketableSecuritiesCurrent ▇███▄▄▄▄▄▄▄▄▃▂▂▂▂▂▂▂▂▁▁515.562575.993565.593559.682296.829269.003286.958243.846255.93301.941300.213293.598191.503128.751137.576133.959137.489138.44131.19133.758106.1336.53129.414NA30.67244.85542.20429.8589.43NA9.889NANA
us-gaap:AccountsReceivableNetCurrent █▇█▆▆▄▅▄▄▄▄▄▃▃▃▂▂▂▂▂▂▂▂▂▁▁▁▁▁205.784178.156199.243151.16143.017101.027127.808101.44105.80690.46585.2882.93569.41952.73857.09651.46541.31139.10537.34337.64528.66624.09426.16824.12114.612.00111.52312.8589.655NA7.237NANA
us-gaap:PrepaidExpenseAndOtherAssetsCurrent ▇██▇▇▇▇▇▇▆▅▅▅▄▄▄▃▃▃▃▃▂▂▂▂▁▁▁▁49.09650.64253.82950.04750.2145.78545.84748.12445.69738.62935.87334.28731.1729.41224.16524.31821.14117.98217.60819.43719.64511.98411.4239.9048.7316.0475.0135.2555.806NA3.008NANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-30
us-gaap:NoncurrentAssets ▆▆▇▇█████▇▂▂▂▂▂▂▂▂▂▂▂▂▂▂▁▁▁▁▁132.814140.592146.547161.114169.207174.619169.524169.464170.619155.71656.38853.31650.9243.27541.36943.09246.08945.10547.26642.51741.29841.27642.37938.55831.42729.36428.28628.61128.049NA8.655NANA
us-gaap:PropertyPlantAndEquipmentGross ████▇▇▇▆▆▅▆▆▆▅▅▄▄▄▄▃▃▃▃▂▂▂▁▁▁200.107204.876197.641198.435190.467183.188174.693164.166152.534134.986165.569163.066158.732142.967134.045127.677125.946118.376114.073103.61896.41390.80386.49282.6271.30165.09760.1556.28350.94NA24.156NANA
us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment ███▇▆▆▅▅▅▄▇▇▆▆▅▅▅▄▄▃▃▃▂▂▂▂▁▁▁106.467110.265103.43396.33787.86680.17172.60369.31565.01459.36789.91590.73189.30681.96774.88868.07764.19357.53451.34246.11140.67935.2629.95229.87325.6821.74618.25515.41912.78NA8.725NANA
us-gaap:AmortizationOfIntangibleAssets ▄▄█▄▄▆▄▆▆▄▅▃▂▂▂▃▃▃▃▃▃▃▃▂▂▂▂▂▂▁▁▁▁2.02.04.02.02.03.02.03.03.02.02.31.20.70.70.81.01.00.91.01.01.00.90.90.40.40.40.40.50.50.0520.00.00.0
us-gaap:PropertyPlantAndEquipmentNet ▇▇▇████▇▆▅▅▅▄▃▃▃▄▃▄▃▃▃▃▃▂▂▁▁▁93.6494.61194.208102.098102.601103.017102.0994.85187.5275.61975.65472.33569.42661.059.15759.661.75360.84262.73157.50755.73455.54356.5452.74745.62143.35141.89540.86438.16NA15.431NANA
us-gaap:Goodwill █████████▅▅▅▃▃▃▃▃▃▃▃▃▃▃▁▁▁▁▁▁170.0170.0169.662169.662169.662169.662169.647169.474169.589111.52111.584112.22559.159.159.13159.13159.13145.64445.34745.87145.99345.84245.3468.579.0768.9349.249.5899.8NA0.0NANA
us-gaap:FiniteLivedIntangibleAssetsNet ▄▅▅▆▆▇▇██▆▇▇▂▂▂▂▂▂▂▂▂▂▂▁▁▁▁▁▂22.91724.69526.55629.94532.14234.43137.23640.04242.84732.54934.74336.6616.5167.1857.9038.6489.6317.0557.958.9769.95510.90411.7043.3183.9524.3214.9125.5696.167NANANANA
us-gaap:IntangibleAssetsNetIncludingGoodwill ▇▇▇██████▆▆▆▃▃▃▃▃▂▂▂▃▃▃▁▁▁▁192.579194.357196.218199.607201.804204.093206.883209.516212.436144.069146.327148.88665.64766.31667.03467.77968.76252.69953.29654.84855.94856.74657.0511.88813.02813.25514.152NANANANANANA
us-gaap:DeferredTaxAssetsLiabilitiesNet NANA7.381NANANA4.958NANANA3.757NANANA1.722NANANA1.282NANANA-1.021NANANA-0.397NANANA0.013NANA
us-gaap:OperatingLeaseRightOfUseAsset ▁▂▃▅▆▆▅▆█▇75.79180.96384.01389.47793.52396.30789.98395.098102.70299.0NANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:OtherAssetsNoncurrent ███▇▇███▇▇▇▄▄▃▃▃▃▂▂▂▂▂▂▁▁▁▁▁▁25.25925.28625.45824.73124.58526.6425.63226.24224.37923.82922.71711.15710.8139.4628.3599.357.9094.3824.2724.5044.1574.6063.5292.452.2821.9111.5311.5451.482NA1.221NANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-30
us-gaap:AccountsPayableCurrent ▄▄▃▂▃▅▇█▇▆▃▆▃▁▁▂▂▁▁▁▁▁▂▁▁▁▁▁▂21.00721.28215.42810.23713.79326.22738.37643.20638.88729.45816.8229.2714.2296.5865.30711.2128.1615.894.5555.4916.4816.4979.3324.394.0793.7784.7635.5016.758NA3.988NANA
us-gaap:AccruedLiabilitiesCurrent ▇▇▇▆▇█▇▇▇▆▆▇▇▇▄▄▃▃▃▂▂▂▁▂▁▁▁▂▂36.26437.94338.92133.7235.90442.62936.34736.53136.59832.72234.09738.69939.48137.63321.87621.58819.93518.44819.10612.83911.96211.6269.74210.4457.9698.8937.68910.22411.764NA4.737NANA
us-gaap:ContractWithCustomerLiabilityCurrent █▇▆▅▅▄▅▄▄▃▃▂▂▁▁438.779393.457378.935324.766314.179301.402320.642290.285286.552257.731245.243222.936206.456183.936173.147NANANANANANANANANANANANANANANANANANA
us-gaap:LiabilitiesCurrent ▇▆▆▆▄▄▄▄█▄▃▃▃▃▂▂▂▂▂▂▂▁▁▁▁▁▁▁▁748.328709.525692.642610.817451.455453.507478.681449.964907.417389.702342.763330.063293.778261.297230.724213.288191.423176.131167.218146.433134.668123.867117.399101.00285.8981.99278.14973.92367.899NA42.153NANA
us-gaap:OperatingLeaseLiabilityCurrent ▁█▆▄▆▃▃▃▅20.30224.73423.53322.323.30921.25321.80421.39822.784NANANANANANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-30
us-gaap:LongTermDebt NANA1332.061NANANA579.613NANANA581.051NANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:LongTermDebt us-gaap:DebtInstrument,us-gaap:LongtermDebtType zen:ConvertibleSeniorNotesDue2023,us-gaap:ConvertibleDebt▃▃▃▃▃██████▇▇▇▁136.011134.187132.388130.615128.866490.014483.464477.007470.641464.364458.176452.075446.06439.9530.0NANANANANANANANANANANANANANANANANANA
 us-gaap:LongTermDebt us-gaap:DebtInstrument,us-gaap:LongtermDebtType zen:ConvertibleSeniorNotesDue2025,us-gaap:ConvertibleDebt█▆▄▃▁957.172946.302935.576924.995914.499NA0.0NANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LongTermDebtNoncurrent ▇▇▇▇█▄▄▄▁▄▄▄▄▄▁957.172946.302935.576925.0071043.365490.014483.464477.0070.0464.364458.176452.075446.06439.9530.0NANANANANANANANANANANANANANANANANANA
us-gaap:OtherLiabilitiesNoncurrent ▂▃▃▂▂▃▃▂▂▁█▇▆▄▃▄▄▃▃▄▅▅▅▄▄▄▄▄▄5.6317.8327.5324.9045.466.857.6624.715.9462.85917.314.59812.8779.2866.6268.1528.4777.5117.3829.92211.2410.5310.5928.9669.9889.1149.1999.5398.193NA1.51NANA
us-gaap:OperatingLeaseLiabilityNoncurrent ▁▃▅▄▄▅▄▅█70.1278.14185.27580.50783.49586.53583.47887.92697.86NANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo NANA28.01525.877NANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree NANA19.10817.088NANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour NANA9.5637.667NANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive NANA8.275NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive NANA32.213NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-30
us-gaap:StockholdersEquity █▇▇▇▇██▇▇▇▇▇▇▇▅▅▅▅▅▅▅▅▅▅▅▅▁▁▁464.127430.243431.831430.119410.309449.943457.984437.189426.977418.945416.921404.777404.866400.653321.641306.17307.969305.397299.428298.534292.717289.851293.29292.631296.83298.269113.706114.622121.743NA-46.276NANA
us-gaap:CommonStockValue ████▇▇▇▇▇▆▆▆▆▆▆▅▅▅▅▄▄▄▄▃▃▃▂▁▁1.1971.1831.1741.1641.1511.1391.131.1191.1061.0921.081.0661.0561.0421.0311.011.0070.9910.9710.9530.9370.9170.9050.8870.880.8590.7550.7210.715NA0.229NANA
us-gaap:AdditionalPaidInCapitalCommonStock █▇▇▇▆▆▆▆▆▅▅▅▅▄▄▄▃▃▃▃▃▃▂▂▂▂▁1492.1171399.0141344.3371273.2421212.4691200.5211155.0441099.731053.488994.031950.693905.386871.343830.741753.568711.301686.336655.792624.026595.135563.6531.431511.183485.417469.855450.027246.0NANANA18.591NANA
us-gaap:RetainedEarningsAccumulatedDeficit ▁▁▂▂▃▃▃▄▄▄▅▅▅▆▅▆▆▆▆▇▇▇▇▇▇████-1023.971-965.625-916.883-846.847-806.145-741.565-698.781-662.613-628.389-573.848-529.128-495.878-461.734-427.368-430.586-403.936-376.248-346.942-319.72-295.172-269.345-243.092-215.921-191.443-172.519-151.037-131.869-114.376-96.457NA-64.454NANA
us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax ▄▄███▁▇▆▇▅▃▃▃▄▅▅▅▄▄▅▅▇▅▅▆▆▆▆▆-5.216-4.3293.2032.562.834-10.1520.591-1.0470.772-2.33-5.724-5.797-5.799-3.762-2.372-2.205-2.474-3.792-5.197-1.73-1.8231.247-2.225-1.578-0.734-0.928-0.528-0.0390.322NA0.01NANA
us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue █▇▆▆▅▅▄▄▄▃▂▂▁▁57.76253.55451.1847.27144.6743.38238.839.80942.0537.32933.55632.16428.95327.487NANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-30
us-gaap:NetCashProvidedByUsedInOperatingActivities ▇▇█▇▁▄▇▆▆▆▆▆▆▆▆26.87833.59546.35733.391-50.711-2.60932.21120.22317.85818.96922.93815.74423.69616.24217.306NANANANANANANANANANANANANANANANANANA
us-gaap:NetCashProvidedByUsedInInvestingActivities ▇▆▇▁█▇▇▇▇▇▆▁▅▇▇-3.0-77.676-37.631-374.636.813-6.911-36.92-14.0031.457-17.286-58.799-361.097-144.552-25.228-16.655NANANANANANANANANANANANANANANANANANA
us-gaap:NetCashProvidedByUsedInFinancingActivities ▁▁▁▁█▁▁▁▁▁▁▁▁█▁19.29616.31513.33322.886515.37912.21910.77914.1919.00514.4366.1189.5584.709508.67816.026NANANANANANANANANANANANANANANANANANA
us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect ▄▄▄▁█▄▄▄▄▄▄▁▃█▄▄▄▄43.163-27.77421.868-318.117501.4962.7156.08620.4328.35316.152-29.707-335.814-116.148499.65716.717-10.341-6.26415.714NANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-30
 us-gaap:AmortizationOfFinancingCosts us-gaap:DebtInstrument,us-gaap:LongtermDebtType zen:ConvertibleSeniorNotesDue2023,us-gaap:ConvertibleDebt▃▃▃▃▇███▇▇▇▇▇▂▁▁▁▁0.1470.1430.1390.1350.4480.4920.4790.4640.4510.4370.4250.4120.3990.0490.00.00.00.0NANANANANANANANANANANANANANANA
 us-gaap:AmortizationOfFinancingCosts us-gaap:DebtInstrument,us-gaap:LongtermDebtType zen:ConvertibleSeniorNotesDue2025,us-gaap:ConvertibleDebt███▇▁0.7150.6970.6780.660.101NANANA0.0NANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:DepreciationDepletionAndAmortization ▆▇▇████▇▆▆▇▆▆▇▅▆▆▆▅▅▅▅▄▃▃▃▃▂▂▁▁▁9.1089.5159.64510.61310.74911.2410.8110.0918.9698.7329.3278.538.7989.8657.6688.1318.2097.9237.5066.8536.6216.5266.0724.8684.5814.2233.7833.1692.6961.8081.6311.426NA
us-gaap:IncreaseDecreaseInAccountsPayable ▄▆▆▃▁▂▄▄▆█▁▇▆▄▃▅▅▅▄▄▄▄▅▄▄▄▄▄▄▄▅▄-0.425.7975.404-3.193-12.692-10.323-0.4631.2585.67815.655-13.07310.3419.2141.052-5.3983.4281.8511.958-1.266-1.6411.272-1.8513.936-0.856-0.051-1.0120.3561.1260.242-0.7771.4540.551NA
us-gaap:IncreaseDecreaseInAccountsReceivable ▆▂█▅█▁▆▃▅▄▄▅▅▃▄▄▄▄▃▄▄▃▄▄▄▄▃▄▃▄▄▄27.868-16.3747.9112.39246.666-26.02330.229-3.03515.9016.9663.28612.82517.587-3.6916.16210.422.3032.3160.0269.3554.325-1.8981.9079.6922.7550.635-1.2586.961-3.0321.1750.4724.154NA
us-gaap:IncreaseDecreaseInOtherOperatingCapitalNet ▅▅▄▅▅▅▄▅▅▅▁▅▄█▅▅▆▅▅▅▅▅▅▅▅▅▅▄▅▅▅▅2.166-0.316-1.8210.4820.3080.232-3.062.4011.2420.498-14.661-1.285-2.71612.0270.4421.9193.2620.3322.0581.449-0.0030.3831.5820.2570.7270.638-0.421-1.8111.241-0.751-0.035-0.616NA
us-gaap:NetCashProvidedByUsedInOperatingActivities ▇▇█▇▁▄▇▆▆▆▆▆▆▆▆26.87833.59546.35733.391-50.711-2.60932.21120.22317.85818.96922.93815.74423.69616.24217.306NANANANANANANANANANANANANANANANANANA
us-gaap:NetIncomeLoss ▂▃▁▄▂▄▅▅▃▄▅▅▅▅▆▆▅▆▆▆▆▆▆▆▆▆▇▇▆▇███-58.407-48.965-70.036-40.703-64.656-42.783-36.168-34.224-54.541-44.72-33.249-34.144-34.366-29.325-26.65-27.689-29.306-26.994-24.549-25.826-26.254-27.171-24.477-18.924-21.482-19.168-17.493-17.919-21.743-10.259-6.106-4.755-6.352
 us-gaap:NetIncomeLoss us-gaap:StatementEquityComponents us-gaap:RetainedEarnings▃▅▁▆▂▆▇▇▄▅▇▇▇█-58.407-48.965-70.036-40.703-64.656-42.783-36.168-34.224-54.541-44.72-33.249-34.144-34.366-29.325NANANANANANANANANANANANANANANANANANANA
us-gaap:ShareBasedCompensation █▇▇▇▆▆▆▆▆▅▅▅▄▄▄▄▄▃▃▃▃▃▃▃▃▂▂▂▂▁▁▁56.69452.37450.14746.26343.71242.08237.67238.6543.75136.65732.90231.44628.14726.98822.24422.51821.07419.21317.44219.99618.64617.69515.49913.44313.38510.2298.51410.81810.9831.8241.110.875NA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-30
us-gaap:NetCashProvidedByUsedInInvestingActivities ▇▆▇▁█▇▇▇▇▇▆▁▅▇▇-3.0-77.676-37.631-374.636.813-6.911-36.92-14.0031.457-17.286-58.799-361.097-144.552-25.228-16.655NANANANANANANANANANANANANANANANANANA
us-gaap:PaymentsToAcquirePropertyPlantAndEquipment ▂▂▂▂▃▆█▇▃▆▅▄█▄▂▃▃▃▅▃▃▂▅▄▃▂▂▄▆▂▁▁2.8963.0613.3883.9295.6229.93813.51211.4744.8969.2588.1917.09613.2286.8083.0624.0584.4854.7918.1534.0845.1613.2498.7586.8254.053.3562.5446.0249.5173.581.4661.671NA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-30
us-gaap:NetCashProvidedByUsedInFinancingActivities ▁▁▁▁█▁▁▁▁▁▁▁▁█▁19.29616.31513.33322.886515.37912.21910.77914.1919.00514.4366.1189.5584.709508.67816.026NANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-30

Common Stock Value

us-gaap:CommonStockValue

us-gaap:CommonStockValue


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302013-12-31
Value1197000.01183000.01174000.01164000.01151000.01139000.01130000.01119000.01106000.01092000.01080000.01066000.01056000.01042000.01031000.01010000.01007000.0991000.0971000.0953000.0937000.0917000.0905000.0887000.0880000.0859000.0755000.0721000.0715000.0229000.0
Percentage of CommonStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.10.10.10.10.10.10.10.10.10.10.10.10.10.10.20.20.20.20.20.20.20.20.20.20.20.20.40.40.40.2

Shares Outstanding

us-gaap:SharesOutstanding us-gaap:StatementEquityComponents

us-gaap:SharesOutstanding

us-gaap:CommonStock


Shares
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value119118117116115113113111110109108106105104103979076232321
Percentage of SharesOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Common Stock Shares Issued

us-gaap:CommonStockSharesIssued

us-gaap:CommonStockSharesIssued


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302013-12-31
Value11911811711611511411311111010910810610510410310110099979593929089888676737223
Percentage of CommonStockSharesIssued100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Common Stock Shares Outstanding

us-gaap:CommonStockSharesOutstanding

us-gaap:CommonStockSharesOutstanding


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302013-12-31
Value11911811711611511411310810810810810310310310310110098969493919088878575727223
Percentage of CommonStockSharesOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Weighted Average Number Of Diluted Shares Outstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding


Weighted
Period End2021-06-302020-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-30
Value119114908786767145222221
Percentage of WeightedAverageNumberOfDilutedSharesOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Weighted Average Number Of Shares Outstanding Basic

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic


Weighted
Period End2021-06-302020-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-30
Value119114908786767145222221
Percentage of WeightedAverageNumberOfSharesOutstandingBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Weighted Average Number Of Share Outstanding Basic And Diluted

us-gaap:WeightedAverageNumberOfShareOutstandingBasicAndDiluted

us-gaap:WeightedAverageNumberOfShareOutstandingBasicAndDiluted


Weighted
Period End2021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-30
Value11711511411311110910810610510310099979492908786767145222221
Percentage of WeightedAverageNumberOfShareOutstandingBasicAndDiluted100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount


Antidilutive
Period End2021-03-312020-03-312019-03-312018-03-312017-03-312016-03-312015-03-312014-03-31
Value1313141414171651
Percentage of AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecurities

us-gaap:RestrictedStockUnitsRSU


Antidilutive
Period End2021-03-312020-03-312019-03-312018-03-312017-03-312016-03-312015-03-312014-03-31
Value5.375.8467.0287.7686.5176.9674.3192.657
Percentage of AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount38.844.948.553.946.039.925.75.1

zen:CommonStockOptionsAndEmployeeStockPurchasePlan


Antidilutive
Period End2021-03-312020-03-312019-03-312018-03-312017-03-312016-03-312015-03-31
Value4.6015.4296.1676.6467.6471012
Percentage of AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount33.241.742.646.154.060.175.1

zen:ConvertibleSeniorNotes


Antidilutive
Period End2021-03-312020-03-31
Value3.8711.749
Percentage of AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount28.013.4

Earnings Per Share Basic

us-gaap:EarningsPerShareBasic

us-gaap:EarningsPerShareBasic


Earnings
Period End2021-06-302020-06-30
Value-0.49-0.56
Percentage of EarningsPerShareBasic100.0100.0

Earnings Per Share Diluted

us-gaap:EarningsPerShareDiluted

us-gaap:EarningsPerShareDiluted


Earnings
Period End2021-06-302020-06-30
Value-0.49-0.56
Percentage of EarningsPerShareDiluted100.0100.0

Earnings Per Share Basic And Diluted

us-gaap:EarningsPerShareBasicAndDiluted

us-gaap:EarningsPerShareBasicAndDiluted


Earnings
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-30
Value-0.42-0.6-0.35-0.56-0.38-0.32-0.31-0.5-0.41-0.31-0.32-0.33-0.28-0.26-0.28-0.29-0.28-0.25-0.27-0.28-0.3-0.28-0.22-0.25-0.25-0.18-0.25-0.48-0.45-0.27-0.22-0.3
Percentage of EarningsPerShareBasicAndDiluted100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Allocated Share Based Compensation Expense

us-gaap:AllocatedShareBasedCompensationExpense us-gaap:AwardType, us-gaap:PlanName

us-gaap:AllocatedShareBasedCompensationExpense

us-gaap:PerformanceShares, zen:PSURetentionPlan


Allocated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value0.01.01.03.01.01.01.02.03.01.0
Percentage of AllocatedShareBasedCompensationExpense0.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.30.01.10.40.40.01.01.50.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:PerformanceShares zen:PSURetentionPlan0.00.00.00.00.00.00.00.00.00.0

Comprehensive Income Net Of Tax

us-gaap:ComprehensiveIncomeNetOfTax

us-gaap:ComprehensiveIncomeNetOfTax


Comprehensive
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-30
Value-59294000.0-56497000.0-69393000.0-40977000.0-51670000.0-53526000.0-34530000.0-36043000.0-51439000.0-41326000.0-33176000.0-34142000.0-36403000.0-30715000.0-26817000.0-27421000.0-27988000.0-25589000.0-28015000.0-25733000.0-29324000.0-23699000.0-25124000.0-19767000.0-21287000.0-19568000.0-17982000.0-18280000.0-21627000.0-10063000.0-6096000.0-4734000.0-6362000.0
Percentage of ComprehensiveIncomeNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-18.6-19.00.0-15.6-20.9-22.50.0-17.1-26.4-22.80.0-22.1-25.7-23.70.0-24.4-27.4-27.30.0-31.9-39.5-34.60.0-35.5-44.1-46.30.0-53.9-73.3-40.10.0-24.6-38.8

Cost Of Revenue

us-gaap:CostOfRevenue

us-gaap:CostOfRevenue


Cost
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-30
Value66606762615961595755514644393433302825232221191716141311118.9957.6536.3275.681
Percentage of CostOfRevenue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax21.020.40.024.024.925.10.028.129.630.70.030.431.130.10.030.030.029.90.029.630.931.40.030.633.533.80.034.539.835.80.032.934.6

Gains Losses On Extinguishment Of Debt

us-gaap:GainsLossesOnExtinguishmentOfDebt

us-gaap:GainsLossesOnExtinguishmentOfDebt


Gains
Period End2020-12-312020-09-302020-06-302019-06-30
Value00-25950000.00
Percentage of GainsLossesOnExtinguishmentOfDebt0.00.0100.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.0-10.50.0

General And Administrative Expense

us-gaap:GeneralAndAdministrativeExpense

us-gaap:GeneralAndAdministrativeExpense


General
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-30
Value45435738363433324331292724222221191816161615131211109.238.948.3156.3844.6933.6465.14
Percentage of GeneralAndAdministrativeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax14.414.50.014.814.714.50.015.622.117.20.017.717.117.10.019.119.419.50.020.121.723.20.022.123.924.00.026.428.225.40.019.031.3

Gross Profit

us-gaap:GrossProfit

us-gaap:GrossProfit


Gross
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-30
Value251237216199185177168151136125121107979088797064635651464238322724221716141210
Percentage of GrossProfit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax79.079.60.076.075.174.90.071.970.469.30.069.668.969.90.070.569.269.10.070.469.168.60.069.466.566.20.065.560.264.20.067.165.4

Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
Value-56052000.0-46611000.0-69052000.0-38730000.0-63368000.0-41267000.0-35479000.0-34588000.0-53950000.0-44286000.0-38065000.0-36478000.0-36033000.0-32615000.0-27382000.0-27822000.0-29996000.0-26956000.0-24356000.0-25532000.0-26162000.0-26757000.0-24693000.0-18662000.0-21283000.0-19075000.0-17484000.0-18155000.0-21828000.0
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-17.6-15.60.0-14.8-25.7-17.40.0-16.4-27.7-24.40.0-23.6-25.4-25.10.0-24.8-29.4-28.70.0-31.6-35.3-39.10.0-33.5-44.1-45.20.0-53.5-74.0

Income Tax Expense Benefit

us-gaap:IncomeTaxExpenseBenefit

us-gaap:IncomeTaxExpenseBenefit


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-30
Value2355000.02354000.0984000.01973000.01288000.01516000.0689000.0-364000.0591000.0434000.0-4807000.0-2334000.0-1667000.0-3300000.0-732000.0-133000.0-690000.038000.0193000.0294000.092000.0414000.0-216000.0262000.0199000.093000.09000.0-236000.0-85000.049000.0101000.042000.058000.0
Percentage of IncomeTaxExpenseBenefit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.70.80.00.80.50.60.0-0.20.30.20.0-1.5-1.2-2.50.0-0.1-0.70.00.00.40.10.60.00.50.40.20.0-0.7-0.30.20.00.20.4

Income Taxes Paid Net

us-gaap:IncomeTaxesPaidNet

us-gaap:IncomeTaxesPaidNet


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value3080000.02416000.02791000.01144000.01292000.0657000.01368000.01794000.01519000.0700000.0-245000.01224000.0627000.0918000.0
Percentage of IncomeTaxesPaidNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.00.80.00.40.50.30.00.90.80.40.00.80.40.7

Interest Expense

us-gaap:InterestExpense

us-gaap:InterestExpense


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value141414148.0866.8876.8236.7276.6146.544
Percentage of InterestExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax4.64.80.05.43.32.90.03.23.43.6

us-gaap:InterestExpense us-gaap:DebtInstrument, us-gaap:LongtermDebtType

zen:ConvertibleSeniorNotesDue2023, us-gaap:ConvertibleDebt


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value1.9171.8921.8661.8426.1926.9086.8176.7256.6366.5446.4556.3756.2890.7640.00.00.00.0
Percentage of InterestExpense13.113.113.113.176.6100.399.9100.0100.3100.00.00.00.00.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.60.60.00.72.52.90.03.23.43.60.04.14.40.60.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax zen:ConvertibleSeniorNotesDue2023 us-gaap:ConvertibleDebt0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

zen:ConvertibleSeniorNotesDue2025, us-gaap:ConvertibleDebt


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-06-30
Value121212121.8920.0
Percentage of InterestExpense86.886.986.886.923.40.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax4.04.20.04.70.80.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax zen:ConvertibleSeniorNotesDue2025 us-gaap:ConvertibleDebt0.00.00.00.00.00.0

Interest Expense Debt

us-gaap:InterestExpenseDebt us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:InterestExpenseDebt

zen:ConvertibleSeniorNotesDue2023, us-gaap:ConvertibleDebt


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value93000.093000.093000.093000.0318000.0359000.0360000.0359000.0359000.0356000.0354000.0360000.0359000.044000.00000
Percentage of InterestExpenseDebt100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.00.00.00.10.20.00.20.20.20.00.20.30.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax zen:ConvertibleSeniorNotesDue2023 us-gaap:ConvertibleDebt0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

zen:ConvertibleSeniorNotesDue2025, us-gaap:ConvertibleDebt


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-06-30
Value1797000.01797000.01797000.01797000.0280000.00
Percentage of InterestExpenseDebt1932.31932.31932.31932.388.10.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.60.60.00.70.10.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax zen:ConvertibleSeniorNotesDue2025 us-gaap:ConvertibleDebt0.00.00.00.00.00.0

Interest Paid Net

us-gaap:InterestPaidNet

us-gaap:InterestPaidNet


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value3594000.0186000.03574000.0186000.0269000.0719000.00719000.00719000.00699000.000
Percentage of InterestPaidNet100.0100.0100.0100.0100.0100.00.0100.00.0100.00.0100.00.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.10.10.00.10.10.30.00.30.00.40.00.50.00.0

Net Income Loss

us-gaap:NetIncomeLoss

us-gaap:NetIncomeLoss


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-30
Value-58407000.0-48965000.0-70036000.0-40703000.0-64656000.0-42783000.0-36168000.0-34224000.0-54541000.0-44720000.0-33249000.0-34144000.0-34366000.0-29325000.0-26650000.0-27689000.0-29306000.0-26994000.0-24549000.0-25826000.0-26254000.0-27171000.0-24477000.0-18924000.0-21482000.0-19168000.0-17493000.0-17919000.0-21743000.0-10259000.0-6106000.0-4755000.0-6352000.0
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-18.4-16.40.0-15.5-26.2-18.00.0-16.3-28.0-24.60.0-22.1-24.2-22.60.0-24.7-28.7-28.80.0-32.0-35.4-39.70.0-34.0-44.5-45.40.0-52.8-73.7-40.90.0-24.7-38.7

us-gaap:NetIncomeLoss us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value-58407000.0-48965000.0-70036000.0-40703000.0-64656000.0-42783000.0-36168000.0-34224000.0-54541000.0-44720000.0-33249000.0-34144000.0-34366000.0-29325000.0
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-18.4-16.40.0-15.5-26.2-18.00.0-16.3-28.0-24.60.0-22.1-24.2-22.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Nonoperating Income Expense

us-gaap:NonoperatingIncomeExpense

us-gaap:NonoperatingIncomeExpense


Nonoperating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value-13631000.0-9331000.0-14258000.0-10404000.0-31870000.017000.0-3178000.0840000.0-2588000.0-372000.0-1548000.0-2277000.0-2436000.01000000.01142000.0619000.0508000.0
Percentage of NonoperatingIncomeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-4.3-3.10.0-4.0-12.90.00.00.4-1.3-0.20.0-1.5-1.70.80.00.60.5

Operating Expenses

us-gaap:OperatingExpenses

us-gaap:OperatingExpenses


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-30
Value29327427122721621920018618816915714213112411610710192888377736757534642403925201716
Percentage of OperatingExpenses100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax92.492.10.086.887.892.20.088.796.893.50.091.792.695.80.095.899.098.10.0102.9104.5107.60.0103.2109.9110.80.0118.1132.7103.00.091.1102.9

Operating Income Loss

us-gaap:OperatingIncomeLoss

us-gaap:OperatingIncomeLoss


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-30
Value-42421000.0-37280000.0-54794000.0-28326000.0-31498000.0-41284000.0-32301000.0-35428000.0-51362000.0-43914000.0-36517000.0-34201000.0-33597000.0-33615000.0-28524000.0-28441000.0-30504000.0-27174000.0-25131000.0-26213000.0-26296000.0-26687000.0-24392000.0-18807000.0-20940000.0-18845000.0-17203000.0-17812000.0-21378000.0-9752000.0-5800000.0-4611000.0-6161000.0
Percentage of OperatingIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-13.3-12.50.0-10.8-12.8-17.40.0-16.8-26.4-24.20.0-22.1-23.7-25.90.0-25.3-29.9-28.90.0-32.5-35.4-39.00.0-33.8-43.4-44.60.0-52.5-72.5-38.90.0-24.0-37.6

Other Comprehensive Income Loss Net Of Tax

us-gaap:OtherComprehensiveIncomeLossNetOfTax

us-gaap:OtherComprehensiveIncomeLossNetOfTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value-0.887-7.5320.643-0.27412-10.7431.638-1.8193.1023.3940.0730.002-2.037-1.39
Percentage of OtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.3-2.50.0-0.15.3-4.50.0-0.91.61.90.00.0-1.4-1.1

us-gaap:OtherComprehensiveIncomeLossNetOfTax us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value-0.887-7.5320.643-0.27412-10.7431.638-1.8193.1023.3940.0730.002-2.037-1.39
Percentage of OtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.3-2.50.0-0.15.3-4.50.0-0.91.61.90.00.0-1.4-1.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Other Nonoperating Income Expense

us-gaap:OtherNonoperatingIncomeExpense

us-gaap:OtherNonoperatingIncomeExpense


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-30
Value0.965.0840.0013.6832.1662.334-1.1642.581-1.2680.7-0.273-0.4630.0271.01.1420.6190.5080.2180.7750.6810.134-0.07-0.3010.145-0.343-0.23-0.281-0.343-0.45-0.458-0.205-0.102-0.133
Percentage of OtherNonoperatingIncomeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.31.70.01.40.91.00.01.2-0.70.40.0-0.30.00.80.00.60.50.20.00.80.2-0.10.00.3-0.7-0.50.0-1.0-1.5-1.80.0-0.5-0.8

Research And Development Expense

us-gaap:ResearchAndDevelopmentExpense

us-gaap:ResearchAndDevelopmentExpense


Research
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-30
Value8273716459605554504645403737302928262422222119161413119.55105.1784.5513.863.528
Percentage of ResearchAndDevelopmentExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax26.024.80.024.823.925.40.025.926.025.80.026.126.528.60.026.228.128.20.028.429.831.50.028.829.531.40.028.235.620.60.020.121.5

Revenue From Contract With Customer Excluding Assessed Tax

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-30
Value31829828326124623722921019418117215414112912111210293898074686255484238332925221916
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:StatementGeographical

country:US


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value162152145136130124120110101948978736865595450
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax51.051.351.252.152.952.252.652.751.952.352.150.951.552.753.452.753.654.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax51.051.351.252.152.952.252.652.751.952.352.150.951.552.753.452.753.654.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax country:US100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EMEA


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value938682736867645955524945413734322926
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax29.229.028.928.227.928.628.228.128.528.728.629.729.429.228.528.828.528.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax29.229.028.928.227.928.628.228.128.528.728.629.729.429.228.528.828.528.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:EMEA100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

zen:APAC


Revenue
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-30
Value31312826252221191816131210
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax10.010.411.110.810.810.910.910.711.711.410.811.410.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax10.010.411.110.810.810.910.910.711.711.410.811.410.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax zen:APAC100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

zen:OtherCountries


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value30272622201918171615131110239.098.0177.43216
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax9.79.39.38.78.48.48.38.28.78.37.77.77.718.27.57.17.318.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax9.79.39.38.78.48.48.38.28.78.37.77.77.718.27.57.17.318.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax zen:OtherCountries100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Revenues

us-gaap:Revenues

us-gaap:Revenues


Revenues
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-30
Value31829828326124623722921019418117215414112912311210193888074686255484238332925221916
Percentage of Revenues100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0101.2100.599.299.199.1100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Selling And Marketing Expense

us-gaap:SellingAndMarketingExpense

us-gaap:SellingAndMarketingExpense


Selling
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-30
Value165157142123121124110999491827469656456524747433936342927232121201411108.208
Percentage of SellingAndMarketingExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax51.952.850.447.249.252.348.247.248.750.548.148.048.950.152.550.651.550.453.254.453.052.854.852.256.555.456.363.568.956.950.752.150.1

Assets

us-gaap:Assets

us-gaap:Assets


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302013-12-31
Value2249217521572054199614881514145914381372123712041159111256052950949147545643942542240439339320520320392
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Liabilities

us-gaap:Liabilities

us-gaap:Liabilities


Liabilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302013-12-31
Value178417441725162415851038105610221012953820799754711238223201185175157147135129111969492898167
Percentage of Liabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets79.480.280.079.179.469.869.870.070.369.566.366.465.164.042.642.239.637.837.034.633.531.930.627.624.624.144.743.840.172.9

Liabilities And Stockholders Equity

us-gaap:LiabilitiesAndStockholdersEquity

us-gaap:LiabilitiesAndStockholdersEquity


Liabilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302013-12-31
Value2249217521572054199614881514145914381372123712041159111256052950949147545643942542240439339320520320392
Percentage of LiabilitiesAndStockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Stockholders Equity

us-gaap:StockholdersEquity

us-gaap:StockholdersEquity


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302013-12-312012-12-312011-12-31
Value464430431430410449457437426418416404404400321306307305299298292289293292296298113114121-46.276-30.205-16.594
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets20.619.820.020.920.630.230.230.029.730.533.733.634.936.057.457.860.462.263.065.466.568.169.472.475.475.955.356.259.9-49.90.00.0

us-gaap:StockholdersEquity us-gaap:CumulativeEffectPeriodOfAdoption, us-gaap:StatementEquityComponents

srt:CumulativeEffectPeriodOfAdoptionAdjustment, us-gaap:AdditionalPaidInCapital


Stockholders
Period End2020-12-31
Value51
Percentage of StockholdersEquity11.8
Percentage of Assets2.4
Percentage of Assets srt:CumulativeEffectPeriodOfAdoptionAdjustment us-gaap:AdditionalPaidInCapital0.0

us-gaap:StockholdersEquity us-gaap:DerivativeInstrumentRisk, us-gaap:StatementEquityComponents

us-gaap:ForeignExchangeForward, us-gaap:AociDerivativeQualifyingAsHedgeExcludedComponentParent


Stockholders
Period End2021-06-302021-03-312020-12-312020-03-312019-09-302019-06-302019-03-31
Value-4.0-4.02.06.0-1.01.0-1.0
Percentage of StockholdersEquity-0.9-0.90.51.3-0.20.2-0.2
Percentage of Assets-0.2-0.20.10.4-0.10.1-0.1
Percentage of Assets us-gaap:ForeignExchangeForward us-gaap:AociDerivativeQualifyingAsHedgeExcludedComponentParent0.00.00.00.00.00.00.0

us-gaap:StockholdersEquity us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-312011-12-31
Value-5.216-4.3293.2032.562.834-10.1520.591-1.0470.772-2.33-5.724-5.797-5.799-3.762-2.372-5.197-2.225-0.5280.010.04
Percentage of StockholdersEquity-1.1-1.00.70.60.7-2.30.1-0.20.2-0.6-1.4-1.4-1.4-0.9-0.7-1.7-0.8-0.5-0.0-0.2
Percentage of Assets-0.2-0.20.10.10.1-0.70.0-0.10.1-0.2-0.5-0.5-0.5-0.3-0.4-1.1-0.5-0.30.00.0
Percentage of Assets us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AdditionalPaidInCapital


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value14921399134412731212120011551099105399495090587183075362451124618121.349
Percentage of StockholdersEquity321.5325.2311.3296.0295.5266.8252.2251.5246.7237.3228.0223.7215.2207.3234.3208.4174.3216.3-40.2-40.1-8.1
Percentage of Assets66.364.362.362.060.780.676.375.473.272.476.875.275.274.7134.5131.3120.9119.520.00.00.0
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CommonStock


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value1.1971.1831.1741.1641.1511.1391.131.1191.1061.0921.081.0661.0561.0421.0310.9710.9050.7550.2290.2120.187
Percentage of StockholdersEquity0.30.30.30.30.30.30.20.30.30.30.30.30.30.30.30.30.30.7-0.5-0.7-1.1
Percentage of Assets0.10.10.10.10.10.10.10.10.10.10.10.10.10.10.20.20.20.40.20.00.0
Percentage of Assets us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value-1023.971-965.625-916.883-846.848-806.145-741.565-698.781-662.613-628.389-573.848-529.128-495.878-461.734-427.368-430.586-319.72-215.921-131.869-64.454-41.883-17.518
Percentage of StockholdersEquity-220.6-224.4-212.3-196.9-196.5-164.8-152.6-151.6-147.2-137.0-126.9-122.5-114.0-106.7-133.9-106.8-73.6-116.0139.3138.7105.6
Percentage of Assets-45.5-44.4-42.5-41.2-40.4-49.8-46.1-45.4-43.7-41.8-42.7-41.2-39.8-38.4-76.9-67.3-51.1-64.1-69.50.00.0
Percentage of Assets us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Assets Current

us-gaap:AssetsCurrent

us-gaap:AssetsCurrent


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302013-12-31
Value1255123812751188123165369261660860057258980483732830230230427926827229028331430932713912814473
Percentage of AssetsCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets55.856.959.157.961.743.945.742.342.343.746.348.969.475.258.657.159.462.158.958.861.968.267.077.878.783.267.563.071.379.6

Cash And Cash Equivalents At Carrying Value

us-gaap:CashAndCashEquivalentsAtCarryingValue

us-gaap:CashAndCashEquivalentsAtCarryingValue


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302012-12-312011-12-31
Value4223784053837001991961901711421261574926091099210210993771182172162552552648080120505329294814
Percentage of CashAndCashEquivalentsAtCarryingValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets18.817.418.818.735.113.413.013.111.910.410.213.142.554.819.517.520.222.319.717.026.851.251.263.265.067.239.039.459.00.057.90.00.00.00.0

Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-31
Value4233804073857042021991931731451281584946101109410411095217
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets18.817.518.918.835.313.613.213.312.010.610.413.242.754.919.817.820.522.620.051.5

Marketable Securities Current

us-gaap:MarketableSecuritiesCurrent

us-gaap:MarketableSecuritiesCurrent


Marketable
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-06-302015-03-312014-12-312014-09-302014-06-302013-12-31
Value5155755655592962692862432553013002931911281371331371381311331063629304442299.439.889
Percentage of MarketableSecuritiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets22.926.526.227.214.918.118.916.717.822.024.324.416.511.624.625.327.028.227.629.324.18.67.07.811.420.514.64.610.7

Accounts Receivable Net Current

us-gaap:AccountsReceivableNetCurrent

us-gaap:AccountsReceivableNetCurrent


Accounts
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302013-12-31
Value205178199151143101127101105908582695257514139373728242624141211129.6557.237
Percentage of AccountsReceivableNetCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets9.18.29.27.47.26.88.47.07.46.66.96.96.04.710.29.78.18.07.98.26.55.76.26.03.73.15.66.34.77.8

Prepaid Expense And Other Assets Current

us-gaap:PrepaidExpenseAndOtherAssetsCurrent

us-gaap:PrepaidExpenseAndOtherAssetsCurrent


Prepaid
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302013-12-31
Value49505350504545484538353431292424211717191911119.9048.7316.0475.0135.2555.8063.008
Percentage of PrepaidExpenseAndOtherAssetsCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets2.22.32.52.42.53.13.03.33.22.82.92.82.72.64.34.64.13.73.74.34.52.82.72.42.21.52.42.62.93.2

Noncurrent Assets

us-gaap:NoncurrentAssets

us-gaap:NoncurrentAssets


Noncurrent
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302013-12-31
Value132140146161169174169169170155565350434143464547424141423831292828288.655
Percentage of NoncurrentAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets5.96.56.87.88.511.711.211.611.911.34.64.44.43.97.48.19.09.29.99.39.49.710.09.58.07.513.714.013.89.3

us-gaap:NoncurrentAssets us-gaap:StatementGeographical

country:IE


Noncurrent
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-31
Value353638384041424344461415169.8055.0194.7885.0675.3175.7035.171
Percentage of NoncurrentAssets27.126.325.924.023.723.625.125.826.429.726.128.932.322.712.111.111.011.812.112.2
Percentage of Assets1.61.71.81.92.02.82.83.03.13.41.21.31.40.90.90.91.01.11.21.2
Percentage of Assets country:IE0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

country:SG


Noncurrent
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value161719212224252729201.117
Percentage of NoncurrentAssets12.312.813.313.113.514.015.316.517.213.22.0
Percentage of Assets0.70.80.91.01.11.61.71.92.01.50.1
Percentage of Assets country:SG0.00.00.00.00.00.00.00.00.00.00.0

country:US


Noncurrent
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302013-12-31
Value67727690969891878277322723212325272426242426262525242223236.466
Percentage of NoncurrentAssets50.551.452.155.956.856.254.051.548.149.657.451.345.249.857.158.959.055.355.857.960.164.363.065.481.482.580.781.882.374.7
Percentage of Assets3.03.33.54.44.86.66.06.05.75.62.62.32.01.94.24.85.35.15.55.45.66.26.36.26.56.211.111.511.47.0
Percentage of Assets country:US0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

srt:AsiaPacific


Noncurrent
Period End2020-12-312019-12-312018-12-312017-12-31
Value26316.8897.734
Percentage of NoncurrentAssets17.818.512.218.7
Percentage of Assets1.22.10.61.4
Percentage of Assets srt:AsiaPacific0.00.00.00.0

us-gaap:EMEA


Noncurrent
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302013-12-31
Value4142434243444647524917181913101010111210109.76710104.7724.0754.3734.6834.5742.054
Percentage of NoncurrentAssets31.430.429.926.225.625.527.328.330.632.030.434.238.832.224.223.723.625.926.524.525.623.724.426.715.213.915.516.416.323.7
Percentage of Assets1.92.02.02.12.23.03.13.33.63.61.41.51.71.31.81.92.12.42.62.32.42.32.42.51.21.02.12.32.22.2
Percentage of Assets us-gaap:EMEA0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

zen:APAC


Noncurrent
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-31
Value232526282931313436286.8897.7148.1377.7927.7347.4867.9978.4498.3575.332
Percentage of NoncurrentAssets17.617.817.817.617.318.018.520.221.418.412.214.516.018.018.717.417.418.717.712.6
Percentage of Assets1.01.21.21.41.52.12.12.32.52.10.60.60.70.71.41.41.61.71.81.3
Percentage of Assets zen:APAC0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

zen:OtherAPACCountries


Noncurrent
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312016-12-312015-12-31
Value6.9697.1386.4667.2186.447.1195.3626.3177.1428.1515.7724.9430.788
Percentage of NoncurrentAssets5.25.14.44.53.84.13.23.74.25.210.210.51.9
Percentage of Assets0.30.30.30.40.30.50.40.40.50.60.51.00.2
Percentage of Assets zen:OtherAPACCountries0.00.00.00.00.00.00.00.00.00.00.00.00.0

zen:OtherCountries


Noncurrent
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302013-12-31
Value0.5910.4650.3440.4140.5070.4710.4175.3323.0311.0631.0531.0960.5320.3960.135
Percentage of NoncurrentAssets0.40.30.20.30.30.30.212.67.93.43.63.91.91.41.6
Percentage of Assets0.00.00.00.00.00.00.01.30.70.30.30.50.30.20.1
Percentage of Assets zen:OtherCountries0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

zen:OtherEMEACountries


Noncurrent
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-31
Value5.7645.7435.7843.5313.3313.2743.7254.2757.1713.5442.452.8163.3284.1475.0075.4235.8266.3756.8345.18
Percentage of NoncurrentAssets4.34.13.92.22.01.92.22.54.22.34.35.36.59.612.112.612.614.114.512.2
Percentage of Assets0.30.30.30.20.20.20.20.30.50.30.20.20.30.40.91.01.11.31.41.2
Percentage of Assets zen:OtherEMEACountries0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

zen:OtherForeignCountries


Noncurrent
Period End2020-12-312019-12-312018-12-31
Value0.3440.4170.006
Percentage of NoncurrentAssets0.20.20.0
Percentage of Assets0.00.00.0
Percentage of Assets zen:OtherForeignCountries0.00.00.0

Property Plant And Equipment Gross

us-gaap:PropertyPlantAndEquipmentGross

us-gaap:PropertyPlantAndEquipmentGross


Property
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302013-12-31
Value20020419719819018317416415213416516315814213412712511811410396908682716560565024
Percentage of PropertyPlantAndEquipmentGross100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets8.99.49.29.79.512.311.511.210.69.813.413.513.712.923.924.124.724.124.022.721.921.320.520.418.116.629.227.625.126.0

us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType

us-gaap:ConstructionInProgress


Property
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302013-12-31
Value1613131016108.6477.431194.56410101216117.078.0317.1687.9935.9374.3582.4384.1574.5753.5780.7573.5466.1986.0140.341
Percentage of PropertyPlantAndEquipmentGross8.36.56.75.38.55.64.94.512.53.46.46.47.911.68.45.56.46.17.05.74.52.74.85.55.01.25.911.011.81.4
Percentage of Assets0.70.60.60.50.80.70.60.51.30.30.90.91.11.52.01.31.61.51.71.31.00.61.01.10.90.21.73.03.00.4
Percentage of Assets us-gaap:ConstructionInProgress0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:FurnitureAndFixtures


Property
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302013-12-31
Value141313161617161512121111109.9029.5819.4969.2818.7528.0146.9886.2495.9255.7395.0924.8714.6194.5244.444.1561.383
Percentage of PropertyPlantAndEquipmentGross7.16.87.08.58.99.39.39.27.98.97.06.86.66.97.17.47.47.47.06.76.56.56.66.26.87.17.57.98.25.7
Percentage of Assets0.60.60.60.80.81.11.11.00.80.90.90.90.90.91.71.81.81.81.71.51.41.41.41.31.21.22.22.22.01.5
Percentage of Assets us-gaap:FurnitureAndFixtures0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:LeaseholdImprovements


Property
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302013-12-31
Value79919191868683765858515142292828282625232120191615151514121.717
Percentage of PropertyPlantAndEquipmentGross39.844.546.146.045.247.348.146.538.643.131.331.326.720.321.022.022.322.622.322.421.922.622.620.221.923.725.226.424.47.1
Percentage of Assets3.54.24.24.44.35.85.55.24.14.24.24.23.72.65.05.35.55.45.35.14.84.84.64.14.03.97.47.36.11.9
Percentage of Assets us-gaap:LeaseholdImprovements0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:SoftwareDevelopment


Property
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302013-12-31
Value535348494140383839373636373331302726252524242225232318141311
Percentage of PropertyPlantAndEquipmentGross26.926.324.724.721.822.222.023.725.727.822.022.323.323.223.623.822.222.422.624.425.326.725.931.033.435.830.825.725.846.0
Percentage of Assets2.42.52.32.42.12.72.52.72.72.72.93.03.23.05.65.85.55.45.45.55.55.75.36.36.15.99.07.16.512.0
Percentage of Assets us-gaap:SoftwareDevelopment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

zen:ComputerEquipmentLicensedSoftwareAndPatents


Property
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302016-12-31
Value353230302928272623222119191716151511
Percentage of PropertyPlantAndEquipmentGross17.815.915.515.515.715.615.616.015.316.912.712.212.612.612.211.812.110.4
Percentage of Assets1.61.51.41.51.51.91.81.81.61.71.71.71.71.62.92.93.02.5
Percentage of Assets zen:ComputerEquipmentLicensedSoftwareAndPatents0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Accumulated Depreciation Depletion And Amortization Property Plant And Equipment

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment


Accumulated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302013-12-31
Value10611010396878072696559899089817468645751464035292925211815128.725
Percentage of AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets4.75.14.84.74.45.44.84.74.54.37.37.57.77.413.412.912.611.710.810.19.28.37.17.46.55.58.97.66.39.4

Amortization Of Intangible Assets

us-gaap:AmortizationOfIntangibleAssets

us-gaap:AmortizationOfIntangibleAssets


Amortization
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-30
Value2.02.04.02.02.03.02.03.03.02.02.31.20.70.70.81.01.00.91.01.01.00.90.90.40.40.40.40.50.50.0520.00.00.0
Percentage of AmortizationOfIntangibleAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Property Plant And Equipment Net

us-gaap:PropertyPlantAndEquipmentNet

us-gaap:PropertyPlantAndEquipmentNet


Property
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302013-12-31
Value9394941021021031029487757572696159596160625755555652454341403815
Percentage of PropertyPlantAndEquipmentNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets4.24.34.45.05.16.96.76.56.15.56.16.06.05.510.611.312.112.413.212.612.713.013.413.011.611.020.420.018.816.6

Goodwill

us-gaap:Goodwill

us-gaap:Goodwill


Goodwill
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302013-12-31
Value17017016916916916916916916911111111259595959594545454545458.579.0768.9349.249.5899.80.0
Percentage of Goodwill100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0
Percentage of Assets7.67.87.98.38.511.411.211.611.88.19.09.35.15.310.611.211.69.39.510.110.510.810.72.12.32.34.54.74.80.0

Finite Lived Intangible Assets Net

us-gaap:FiniteLivedIntangibleAssetsNet

us-gaap:FiniteLivedIntangibleAssetsNet


Finite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
Value2224262932343740423234366.5167.1857.9038.6489.6317.0557.958.9769.95510113.3183.9524.3214.9125.5696.167
Percentage of FiniteLivedIntangibleAssetsNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.01.11.21.51.62.32.52.73.02.42.83.00.60.61.41.61.91.41.72.02.32.62.80.81.01.12.42.73.0

us-gaap:FiniteLivedIntangibleAssetsNet us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:CustomerRelationships


Finite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
Value7.357.9928.6349.2869.957101112129.48310110.4670.5250.6310.7660.90.610.7030.8280.941.0451.1170.7150.8360.91.0081.1281.235
Percentage of FiniteLivedIntangibleAssetsNet32.132.432.531.031.030.930.430.029.729.129.030.17.27.38.08.99.38.68.89.29.49.69.521.521.220.820.520.320.0
Percentage of Assets0.30.40.40.50.50.70.70.80.90.70.80.90.00.00.10.10.20.10.10.20.20.20.30.20.20.20.50.60.6
Percentage of Assets us-gaap:CustomerRelationships0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:DevelopedTechnologyRights


Finite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
Value1516172021222426272122246.0496.667.2727.8828.7316.4457.2478.1489.0159.859102.6033.1163.4213.8914.4134.888
Percentage of FiniteLivedIntangibleAssetsNet67.967.566.968.067.266.265.865.565.266.165.866.092.892.792.091.190.791.491.290.890.690.490.578.578.879.279.279.279.3
Percentage of Assets0.70.80.81.01.11.51.61.81.91.61.82.00.50.61.31.51.71.31.51.82.02.32.50.60.80.91.92.22.4
Percentage of Assets us-gaap:DevelopedTechnologyRights0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OrderOrProductionBacklog


Finite
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value0.0420.1670.2920.61.01.41.82.21.5581.8331.437
Percentage of FiniteLivedIntangibleAssetsNet0.20.61.01.92.93.84.55.14.85.33.9
Percentage of Assets0.00.00.00.00.10.10.10.20.10.10.1
Percentage of Assets us-gaap:OrderOrProductionBacklog0.00.00.00.00.00.00.00.00.00.00.0

Intangible Assets Net Including Goodwill

us-gaap:IntangibleAssetsNetIncludingGoodwill

us-gaap:IntangibleAssetsNetIncludingGoodwill


Intangible
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-31
Value192194196199201204206209212144146148656667676852535455565711131314
Percentage of IntangibleAssetsNetIncludingGoodwill100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets8.68.99.19.710.113.713.714.414.810.511.812.45.76.012.012.813.510.711.212.012.713.313.52.93.33.46.9

Deferred Tax Assets Liabilities Net

us-gaap:DeferredTaxAssetsLiabilitiesNet

us-gaap:DeferredTaxAssetsLiabilitiesNet


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value7381000.04958000.03757000.01722000.01282000.0-1021000.0-397000.013000.0
Percentage of DeferredTaxAssetsLiabilitiesNet100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.30.30.30.30.3-0.2-0.20.0

Operating Lease Right Of Use Asset

us-gaap:OperatingLeaseRightOfUseAsset

us-gaap:OperatingLeaseRightOfUseAsset


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value758084899396899510299
Percentage of OperatingLeaseRightOfUseAsset100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets3.43.73.94.44.76.55.96.57.17.2

Other Assets Noncurrent

us-gaap:OtherAssetsNoncurrent

us-gaap:OtherAssetsNoncurrent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302013-12-31
Value252525242426252624232211109.4628.3599.357.9094.3824.2724.5044.1574.6063.5292.452.2821.9111.5311.5451.4821.221
Percentage of OtherAssetsNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.11.21.21.21.21.81.71.81.71.71.80.90.90.91.51.81.60.90.91.00.91.10.80.60.60.50.70.80.71.3

Accounts Payable Current

us-gaap:AccountsPayableCurrent

us-gaap:AccountsPayableCurrent


Accounts
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302013-12-31
Value212115101326384338291629146.5865.307118.1615.894.5555.4916.4816.4979.3324.394.0793.7784.7635.5016.7583.988
Percentage of AccountsPayableCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.91.00.70.50.71.82.53.02.72.11.42.41.20.60.92.11.61.21.01.21.51.52.21.11.01.02.32.73.34.3

Accrued Liabilities Current

us-gaap:AccruedLiabilitiesCurrent

us-gaap:AccruedLiabilitiesCurrent


Accrued
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302013-12-31
Value363738333542363636323438393721211918191211119.742107.9698.8937.68910114.737
Percentage of AccruedLiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.61.71.81.61.82.92.42.52.52.42.83.23.43.43.94.13.93.84.02.82.72.72.32.62.02.33.75.05.85.1

Contract With Customer Liability Current

us-gaap:ContractWithCustomerLiabilityCurrent

us-gaap:ContractWithCustomerLiabilityCurrent


Contract
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value438393378324314301320290286257245222206183173
Percentage of ContractWithCustomerLiabilityCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets19.518.117.615.815.720.221.219.919.918.819.818.517.816.530.9

Liabilities Current

us-gaap:LiabilitiesCurrent

us-gaap:LiabilitiesCurrent


Liabilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302013-12-31
Value748709692610451453478449907389342330293261230213191176167146134123117101858178736742
Percentage of LiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets33.332.632.129.722.630.531.630.863.128.427.727.425.323.541.240.337.635.935.232.130.629.127.825.021.820.938.036.233.445.5

Operating Lease Liability Current

us-gaap:OperatingLeaseLiabilityCurrent

us-gaap:OperatingLeaseLiabilityCurrent


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
Value202423222321212122
Percentage of OperatingLeaseLiabilityCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.91.11.11.11.21.41.41.51.6

Long Term Debt

us-gaap:LongTermDebt

us-gaap:LongTermDebt


Long
Period End2020-12-312019-12-312018-12-31
Value1332579581
Percentage of LongTermDebt100.0100.0100.0
Percentage of Assets61.738.346.9

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

zen:ConvertibleSeniorNotesDue2023, us-gaap:ConvertibleDebt


Long
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value1361341321301284904834774704644584524464390.0
Percentage of LongTermDebt0.00.09.90.00.00.083.40.00.00.078.90.00.00.00.0
Percentage of Assets6.06.26.16.46.532.931.932.732.733.837.037.538.539.50.0
Percentage of Assets zen:ConvertibleSeniorNotesDue2023 us-gaap:ConvertibleDebt0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

zen:ConvertibleSeniorNotesDue2025, us-gaap:ConvertibleDebt


Long
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value9579469359249140.0
Percentage of LongTermDebt0.00.070.20.00.00.0
Percentage of Assets42.643.543.445.045.80.0
Percentage of Assets zen:ConvertibleSeniorNotesDue2025 us-gaap:ConvertibleDebt0.00.00.00.00.00.0

Long Term Debt Noncurrent

us-gaap:LongTermDebtNoncurrent

us-gaap:LongTermDebtNoncurrent


Long
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value95794693592510434904834770.04644584524464390.0
Percentage of LongTermDebtNoncurrent100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.00.0
Percentage of Assets42.643.543.445.052.332.931.932.70.033.837.037.538.539.50.0

Other Liabilities Noncurrent

us-gaap:OtherLiabilitiesNoncurrent

us-gaap:OtherLiabilitiesNoncurrent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302013-12-31
Value5.6317.8327.5324.9045.466.857.6624.715.9462.8591714129.2866.6268.1528.4777.5117.3829.9221110108.9669.9889.1149.1999.5398.1931.51
Percentage of OtherLiabilitiesNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.30.40.30.20.30.50.50.30.40.21.41.21.10.81.21.51.71.51.62.22.62.52.52.22.52.34.54.74.01.6

Operating Lease Liability Noncurrent

us-gaap:OperatingLeaseLiabilityNoncurrent

us-gaap:OperatingLeaseLiabilityNoncurrent


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
Value707885808386838797
Percentage of OperatingLeaseLiabilityNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets3.13.64.03.94.25.85.56.06.8

Lessee Operating Lease Liability Payments Due Year Two

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo


Lessee
Period End2020-12-312020-09-30
Value2825
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearTwo100.0100.0
Percentage of Assets1.31.3

Lessee Operating Lease Liability Payments Due Year Three

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree


Lessee
Period End2020-12-312020-09-30
Value1917
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearThree100.0100.0
Percentage of Assets0.90.8

Lessee Operating Lease Liability Payments Due Year Four

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour


Lessee
Period End2020-12-312020-09-30
Value9563000.07667000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearFour100.0100.0
Percentage of Assets0.40.4

Lessee Operating Lease Liability Payments Due Year Five

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive


Lessee
Period End2020-12-31
Value8275000.0
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 End2020-12-31
Value32
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive100.0
Percentage of Assets1.5

Operating Lease Liability

us-gaap:OperatingLeaseLiability

us-gaap:OperatingLeaseLiability


Operating
Period End2020-12-312020-09-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value108102107105109120114
Percentage of OperatingLeaseLiability100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets5.05.07.27.07.58.48.3

Lessee Operating Lease Liability Payments Due

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue


Lessee
Period End2020-12-312020-09-30
Value124117
Percentage of LesseeOperatingLeaseLiabilityPaymentsDue100.0100.0
Percentage of Assets5.85.7

Lessee Operating Lease Liability Undiscounted Excess Amount

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount


Lessee
Period End2020-12-312020-09-30
Value1514
Percentage of LesseeOperatingLeaseLiabilityUndiscountedExcessAmount100.0100.0
Percentage of Assets0.70.7

Stockholders Equity

us-gaap:StockholdersEquity

us-gaap:StockholdersEquity


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302013-12-312012-12-312011-12-31
Value464430431430410449457437426418416404404400321306307305299298292289293292296298113114121-46.276-30.205-16.594
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets20.619.820.020.920.630.230.230.029.730.533.733.634.936.057.457.860.462.263.065.466.568.169.472.475.475.955.356.259.9-49.90.00.0

us-gaap:StockholdersEquity us-gaap:CumulativeEffectPeriodOfAdoption, us-gaap:StatementEquityComponents

srt:CumulativeEffectPeriodOfAdoptionAdjustment, us-gaap:AdditionalPaidInCapital


Stockholders
Period End2020-12-31
Value51
Percentage of StockholdersEquity11.8
Percentage of Assets2.4
Percentage of Assets srt:CumulativeEffectPeriodOfAdoptionAdjustment us-gaap:AdditionalPaidInCapital0.0

us-gaap:StockholdersEquity us-gaap:DerivativeInstrumentRisk, us-gaap:StatementEquityComponents

us-gaap:ForeignExchangeForward, us-gaap:AociDerivativeQualifyingAsHedgeExcludedComponentParent


Stockholders
Period End2021-06-302021-03-312020-12-312020-03-312019-09-302019-06-302019-03-31
Value-4.0-4.02.06.0-1.01.0-1.0
Percentage of StockholdersEquity-0.9-0.90.51.3-0.20.2-0.2
Percentage of Assets-0.2-0.20.10.4-0.10.1-0.1
Percentage of Assets us-gaap:ForeignExchangeForward us-gaap:AociDerivativeQualifyingAsHedgeExcludedComponentParent0.00.00.00.00.00.00.0

us-gaap:StockholdersEquity us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-312011-12-31
Value-5.216-4.3293.2032.562.834-10.1520.591-1.0470.772-2.33-5.724-5.797-5.799-3.762-2.372-5.197-2.225-0.5280.010.04
Percentage of StockholdersEquity-1.1-1.00.70.60.7-2.30.1-0.20.2-0.6-1.4-1.4-1.4-0.9-0.7-1.7-0.8-0.5-0.0-0.2
Percentage of Assets-0.2-0.20.10.10.1-0.70.0-0.10.1-0.2-0.5-0.5-0.5-0.3-0.4-1.1-0.5-0.30.00.0
Percentage of Assets us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AdditionalPaidInCapital


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value14921399134412731212120011551099105399495090587183075362451124618121.349
Percentage of StockholdersEquity321.5325.2311.3296.0295.5266.8252.2251.5246.7237.3228.0223.7215.2207.3234.3208.4174.3216.3-40.2-40.1-8.1
Percentage of Assets66.364.362.362.060.780.676.375.473.272.476.875.275.274.7134.5131.3120.9119.520.00.00.0
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CommonStock


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value1.1971.1831.1741.1641.1511.1391.131.1191.1061.0921.081.0661.0561.0421.0310.9710.9050.7550.2290.2120.187
Percentage of StockholdersEquity0.30.30.30.30.30.30.20.30.30.30.30.30.30.30.30.30.30.7-0.5-0.7-1.1
Percentage of Assets0.10.10.10.10.10.10.10.10.10.10.10.10.10.10.20.20.20.40.20.00.0
Percentage of Assets us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value-1023.971-965.625-916.883-846.848-806.145-741.565-698.781-662.613-628.389-573.848-529.128-495.878-461.734-427.368-430.586-319.72-215.921-131.869-64.454-41.883-17.518
Percentage of StockholdersEquity-220.6-224.4-212.3-196.9-196.5-164.8-152.6-151.6-147.2-137.0-126.9-122.5-114.0-106.7-133.9-106.8-73.6-116.0139.3138.7105.6
Percentage of Assets-45.5-44.4-42.5-41.2-40.4-49.8-46.1-45.4-43.7-41.8-42.7-41.2-39.8-38.4-76.9-67.3-51.1-64.1-69.50.00.0
Percentage of Assets us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Common Stock Value

us-gaap:CommonStockValue

us-gaap:CommonStockValue


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302013-12-31
Value1197000.01183000.01174000.01164000.01151000.01139000.01130000.01119000.01106000.01092000.01080000.01066000.01056000.01042000.01031000.01010000.01007000.0991000.0971000.0953000.0937000.0917000.0905000.0887000.0880000.0859000.0755000.0721000.0715000.0229000.0
Percentage of CommonStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.10.10.10.10.10.10.10.10.10.10.10.10.10.10.20.20.20.20.20.20.20.20.20.20.20.20.40.40.40.2

Additional Paid In Capital Common Stock

us-gaap:AdditionalPaidInCapitalCommonStock

us-gaap:AdditionalPaidInCapitalCommonStock


Additional
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312013-12-31
Value14921399134412731212120011551099105399495090587183075371168665562459556353151148546945024618
Percentage of AdditionalPaidInCapitalCommonStock100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets66.364.362.362.060.780.676.375.473.272.476.875.275.274.7134.5134.4134.7133.6131.3130.4128.1124.8120.9120.1119.4114.5119.520.0

Retained Earnings Accumulated Deficit

us-gaap:RetainedEarningsAccumulatedDeficit

us-gaap:RetainedEarningsAccumulatedDeficit


Retained
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302013-12-31
Value-1023.971-965.625-916.883-846.847-806.145-741.565-698.781-662.613-628.389-573.848-529.128-495.878-461.734-427.368-430.586-403.936-376.248-346.942-319.72-295.172-269.345-243.092-215.921-191.443-172.519-151.037-131.869-114.376-96.457-64.454
Percentage of RetainedEarningsAccumulatedDeficit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets-45.5-44.4-42.5-41.2-40.4-49.8-46.1-45.4-43.7-41.8-42.7-41.2-39.8-38.4-76.9-76.3-73.8-70.7-67.3-64.7-61.2-57.1-51.1-47.4-43.9-38.4-64.1-56.1-47.4-69.5

Accumulated Other Comprehensive Income Loss Net Of Tax

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax


Accumulated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302013-12-31
Value-5216000.0-4329000.03203000.02560000.02834000.0-10152000.0591000.0-1047000.0772000.0-2330000.0-5724000.0-5797000.0-5799000.0-3762000.0-2372000.0-2205000.0-2474000.0-3792000.0-5197000.0-1730000.0-1823000.01247000.0-2225000.0-1578000.0-734000.0-928000.0-528000.0-39000.0322000.010000.0
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets-0.2-0.20.10.10.1-0.70.0-0.10.1-0.2-0.5-0.5-0.5-0.3-0.4-0.4-0.5-0.8-1.1-0.4-0.40.3-0.5-0.4-0.2-0.2-0.3-0.00.20.0

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

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue


Adjustments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value5753514744433839423733322827
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 End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value5753514744433839423733322827
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 End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value26334633-50.711-2.609322017182215231617
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax8.411.316.412.7-20.6-1.114.09.69.210.513.310.216.712.514.2

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value-3.0-77.676-37.631-374.636-6.911-36.92-14.0031.457-17.286-58.799-361.097-144.552-25.228-16.655
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.9-26.1-13.3-143.014.9-2.9-16.1-6.70.7-9.5-34.1-233.2-101.9-19.4-13.7

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value191613225151210149.005146.1189.5584.70950816
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax6.15.54.78.7208.95.14.76.74.68.03.66.23.3391.913.1

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

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value43-27.77421-318.1175012.7156.086202816-29.707-335.814-116.14849916-10.341-6.26415
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax13.6-9.37.7-121.5203.31.12.69.714.68.9-17.2-216.9-81.9385.013.7-9.2-6.116.7

Amortization Of Financing Costs

us-gaap:AmortizationOfFinancingCosts us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:AmortizationOfFinancingCosts

zen:ConvertibleSeniorNotesDue2023, us-gaap:ConvertibleDebt


Amortization
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value147000.0143000.0139000.0135000.0448000.0492000.0479000.0464000.0451000.0437000.0425000.0412000.0399000.049000.00000
Percentage of AmortizationOfFinancingCosts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.0

zen:ConvertibleSeniorNotesDue2025, us-gaap:ConvertibleDebt


Amortization
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-06-30
Value715000.0697000.0678000.0660000.0101000.00
Percentage of AmortizationOfFinancingCosts486.4487.4487.8488.922.50.0

Depreciation Depletion And Amortization

us-gaap:DepreciationDepletionAndAmortization

us-gaap:DepreciationDepletionAndAmortization


Depreciation
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value9.1089.5159.64510101110108.9698.7329.3278.538.7989.8657.6688.1318.2097.9237.5066.8536.6216.5266.0724.8684.5814.2233.7833.1692.6961.8081.6311.426
Percentage of DepreciationDepletionAndAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Increase Decrease In Accounts Payable

us-gaap:IncreaseDecreaseInAccountsPayable

us-gaap:IncreaseDecreaseInAccountsPayable


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value-0.425.7975.404-3.193-12.692-10.323-0.4631.2585.67815-13.073109.2141.052-5.3983.4281.8511.958-1.266-1.6411.272-1.8513.936-0.856-0.051-1.0120.3561.1260.242-0.7771.4540.551
Percentage of IncreaseDecreaseInAccountsPayable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Increase Decrease In Accounts Receivable

us-gaap:IncreaseDecreaseInAccountsReceivable

us-gaap:IncreaseDecreaseInAccountsReceivable


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value27-16.37471246-26.02330-3.035156.9663.2861217-3.6916.162102.3032.3160.0269.3554.325-1.8981.9079.6922.7550.635-1.2586.961-3.0321.1750.4724.154
Percentage of IncreaseDecreaseInAccountsReceivable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Increase Decrease In Other Operating Capital Net

us-gaap:IncreaseDecreaseInOtherOperatingCapitalNet

us-gaap:IncreaseDecreaseInOtherOperatingCapitalNet


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value2.166-0.316-1.8210.4820.3080.232-3.062.4011.2420.498-14.661-1.285-2.716120.4421.9193.2620.3322.0581.449-0.0030.3831.5820.2570.7270.638-0.421-1.8111.241-0.751-0.035-0.616
Percentage of IncreaseDecreaseInOtherOperatingCapitalNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInOperatingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value26334633-50.711-2.609322017182215231617
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax8.411.316.412.7-20.6-1.114.09.69.210.513.310.216.712.514.2

Net Income Loss

us-gaap:NetIncomeLoss

us-gaap:NetIncomeLoss


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-30
Value-58407000.0-48965000.0-70036000.0-40703000.0-64656000.0-42783000.0-36168000.0-34224000.0-54541000.0-44720000.0-33249000.0-34144000.0-34366000.0-29325000.0-26650000.0-27689000.0-29306000.0-26994000.0-24549000.0-25826000.0-26254000.0-27171000.0-24477000.0-18924000.0-21482000.0-19168000.0-17493000.0-17919000.0-21743000.0-10259000.0-6106000.0-4755000.0-6352000.0
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-18.4-16.4-24.7-15.5-26.2-18.0-15.7-16.3-28.0-24.6-19.3-22.1-24.2-22.6-21.9-24.7-28.7-28.8-27.4-32.0-35.4-39.7-39.1-34.0-44.5-45.4-45.4-52.8-73.7-40.9-27.1-24.7-38.7

us-gaap:NetIncomeLoss us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value-58407000.0-48965000.0-70036000.0-40703000.0-64656000.0-42783000.0-36168000.0-34224000.0-54541000.0-44720000.0-33249000.0-34144000.0-34366000.0-29325000.0
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-18.4-16.4-24.7-15.5-26.2-18.0-15.7-16.3-28.0-24.6-19.3-22.1-24.2-22.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Share Based Compensation

us-gaap:ShareBasedCompensation

us-gaap:ShareBasedCompensation


Share
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value56525046434237384336323128262222211917191817151313108.51410101.8241.110.875
Percentage of ShareBasedCompensation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ShareBasedCompensation us-gaap:IncomeStatementLocation

us-gaap:CostOfSales


Share
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value5.2184.4864.9914.8315.1875.0595.2785.3975.2464.9374.3353.9293.4743.0982.3722.4082.1562.1041.691.9191.8021.6331.4051.1311.1140.8910.7730.591
Percentage of ShareBasedCompensation9.28.610.010.411.912.014.014.012.013.513.212.512.311.510.710.710.211.09.79.69.79.29.18.48.38.79.15.5

us-gaap:GeneralAndAdministrativeExpense


Share
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value9.9518.9838.9368.1768.4237.8386.9957.244137.6857.2036.5795.9675.6525.7615.6195.3214.5623.9544.2474.413.9963.5593.5513.892.8422.3082.298
Percentage of ShareBasedCompensation17.617.217.817.719.318.618.618.729.821.021.920.921.220.925.925.025.223.722.721.223.722.623.026.429.127.827.121.2

us-gaap:ResearchAndDevelopmentExpense


Share
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value1715141312121112111110109.529107.6977.7767.5846.9146.5357.1726.7496.6275.934.9744.4464.0643.3883.052
Percentage of ShareBasedCompensation30.029.929.730.128.730.029.931.527.231.733.234.033.937.934.634.536.036.037.535.936.237.538.337.033.239.739.828.2

us-gaap:SellingAndMarketingExpense


Share
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value2423211917161413131210109.1788.0076.4146.7166.0135.6335.2636.6575.6845.4394.6053.7863.9372.4322.0454.877
Percentage of ShareBasedCompensation43.244.442.541.840.239.337.635.831.033.831.732.632.629.728.829.828.529.330.233.330.530.729.728.229.423.824.045.1

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value-3.0-77.676-37.631-374.636-6.911-36.92-14.0031.457-17.286-58.799-361.097-144.552-25.228-16.655
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.9-26.1-13.3-143.014.9-2.9-16.1-6.70.7-9.5-34.1-233.2-101.9-19.4-13.7

Payments To Acquire Property Plant And Equipment

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value2.8963.0613.3883.9295.6229.93813114.8969.2588.1917.096136.8083.0624.0584.4854.7918.1534.0845.1613.2498.7586.8254.053.3562.5446.0249.5173.581.4661.671
Percentage of PaymentsToAcquirePropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value191613225151210149.005146.1189.5584.70950816
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax6.15.54.78.7208.95.14.76.74.68.03.66.23.3391.913.1

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

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber


Share
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302013-12-31
Value3.9274.294.2354.3765.0345.1294.865.1135.5675.8725.9386.0666.2536.3346.2397.2187.3727.3798.4799.53210101011111212141410
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice


Share
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302013-12-31
Value42.739.6531.4230.7930.3629.8524.0823.8623.6723.7120.8520.5420.4919.617.3116.6316.2915.1714.5214.2313.712.1811.9411.2811.079.87.396.245.382.82
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod

us-gaap:RestrictedStockUnitsRSU


Share
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312016-09-30
Value362000.01081000.0798000.0508000.0529000.01398000.0325000.0508000.0481000.01522000.0587000.0331000.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Deferred Tax Liabilities

us-gaap:DeferredTaxLiabilities

us-gaap:DeferredTaxLiabilities


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312015-12-312014-12-31
Value984537121.0210.397
Percentage of DeferredTaxLiabilities100.0100.0100.0100.0100.0100.0

Deferred Tax Assets Net

us-gaap:DeferredTaxAssetsNet

us-gaap:DeferredTaxAssetsNet


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value10650414.7755.7565.3144.22.22
Percentage of DeferredTaxAssetsNet100.0100.0100.0100.0100.0100.0100.0100.0

Unrecognized Tax Benefits

us-gaap:UnrecognizedTaxBenefits

us-gaap:UnrecognizedTaxBenefits


Unrecognized
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value39292115118.5035.9553.9171.939
Percentage of UnrecognizedTaxBenefits100.0100.0100.0100.0100.0100.0100.0100.0100.0

Deferred Tax Assets Valuation Allowance

us-gaap:DeferredTaxAssetsValuationAllowance

us-gaap:DeferredTaxAssetsValuationAllowance


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value23722015812692653919
Percentage of DeferredTaxAssetsValuationAllowance100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AdjustmentsToAdditionalPaidInCapitalConvertibleDebtWithConversionFeature

us-gaap:AdjustmentsToAdditionalPaidInCapitalConvertibleDebtWithConversionFeature


Adjustments
Period End2020-12-312020-09-302020-06-302019-09-302019-06-302018-12-312018-09-302018-06-302018-03-31
Value0.00.02160.00.00.00.00.04944
Percentage of AdjustmentsToAdditionalPaidInCapitalConvertibleDebtWithConversionFeature0.00.0100.00.00.00.00.0100.0100.0

us-gaap:AdjustmentsToAdditionalPaidInCapitalConvertibleDebtWithConversionFeature us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Adjustments
Period End2020-12-312020-09-302020-06-302018-12-312018-09-302018-06-302018-03-31
Value0.00.02160.00.00.04944
Percentage of AdjustmentsToAdditionalPaidInCapitalConvertibleDebtWithConversionFeature0.00.0100.00.00.0100.0100.0

us-gaap:AmortizationOfDebtDiscountPremium us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:AmortizationOfDebtDiscountPremium

zen:ConvertibleSeniorNotesDue2023, us-gaap:ConvertibleDebt


Amortization
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value1.6771.6561.6341.6145.4266.0575.9785.9025.8265.7515.6765.6035.5310.6710.00.00.00.0
Percentage of AmortizationOfDebtDiscountPremium100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.0

zen:ConvertibleSeniorNotesDue2025, us-gaap:ConvertibleDebt


Amortization
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-06-30
Value10109.9079.7851.5110.0
Percentage of AmortizationOfDebtDiscountPremium605.5605.6606.3606.327.80.0

us-gaap:AmortizationOfFinancingCostsAndDiscounts

us-gaap:AmortizationOfFinancingCostsAndDiscounts


Amortization
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value121212127.4876.5496.4576.3666.2776.1886.1016.0155.930.720.00.00.00.0
Percentage of AmortizationOfFinancingCostsAndDiscounts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.0

us-gaap:AvailableForSaleDebtSecuritiesGrossUnrealizedGain

us-gaap:AvailableForSaleDebtSecuritiesGrossUnrealizedGain


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value04000000.0-1000000.0-2000000.06000000.03000000.0
Percentage of AvailableForSaleDebtSecuritiesGrossUnrealizedGain0.0100.0100.0100.0100.0100.0

us-gaap:CapitalExpendituresIncurredButNotYetPaid

us-gaap:CapitalExpendituresIncurredButNotYetPaid


Capital
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value0.2371.078-0.637-1.337-1.8224.801-3.328-0.169102.411-0.0980.7591.4173.5040.4531.160.1090.1151.1440.914-0.7932.345-1.0713.2870.4650.014-0.624-4.0031.5063.4950.238-0.032
Percentage of CapitalExpendituresIncurredButNotYetPaid100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CapitalizedComputerSoftwareAmortization1

us-gaap:CapitalizedComputerSoftwareAmortization1


Capitalized
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-30
Value2000000.02000000.03000000.02000000.02000000.02000000.01000000.02000000.02000000.02000000.01500000.01500000.01400000.01500000.01700000.01800000.02100000.02100000.02200000.01800000.01800000.01700000.01600000.01600000.01500000.0
Percentage of CapitalizedComputerSoftwareAmortization1100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CapitalizedContractCostAmortization

us-gaap:CapitalizedContractCostAmortization


Capitalized
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value16141312119.9659.1338.08.06.9186.185.65.04.54.1023.73.43.2
Percentage of CapitalizedContractCostAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ContractWithCustomerLiabilityRevenueRecognized

us-gaap:ContractWithCustomerLiabilityRevenueRecognized


Contract
Period End2021-03-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value2822492342242162011261181310293858.4696963
Percentage of ContractWithCustomerLiabilityRevenueRecognized100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ContractWithCustomerLiabilityRevenueRecognized us-gaap:ProductOrService

zen:OtherRevenue


Contract
Period End2021-06-302020-06-30
Value-16.202-12.06
Percentage of ContractWithCustomerLiabilityRevenueRecognized0.0-5.1

zen:SubscriptionAndServices


Contract
Period End2021-06-302020-06-30
Value302234
Percentage of ContractWithCustomerLiabilityRevenueRecognized0.0100.0

us-gaap:DebtInstrumentConvertibleConversionRatio1 us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:DebtInstrumentConvertibleConversionRatio1

zen:ConvertibleSeniorNotesDue2023, us-gaap:ConvertibleDebt


Debt
Period End2020-12-312020-09-302018-03-31
Value000.015855
Percentage of DebtInstrumentConvertibleConversionRatio10.00.0100.0

us-gaap:Depreciation

us-gaap:Depreciation


Depreciation
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-30
Value6.06.06.07.06.07.06.05.05.05.05.35.86.56.35.25.35.14.84.44.13.93.73.52.82.62.32.11.71.21.01.00.80.7
Percentage of Depreciation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

us-gaap:EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents


Effect
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value-11000.0-8000.0-191000.0206000.015000.016000.016000.019000.033000.033000.036000.0-19000.0-1000.0-35000.040000.09000.081000.0198000.0
Percentage of EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount us-gaap:BalanceSheetLocation

us-gaap:EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount

us-gaap:OtherAssets


Employee
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value713000.0616000.0532000.0293000.0404000.0357000.0369000.0297000.0232000.0207000.0163000.0
Percentage of EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

zen:GoodwillAndIntangibleAssetsNet


Employee
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value354000.0562000.0928000.0758000.0850000.0579000.0425000.0375000.0487000.0649000.0850000.0
Percentage of EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount49.691.2174.4258.7210.4162.2115.2126.3209.9313.5521.5

us-gaap:GoodwillOtherIncreaseDecrease

us-gaap:GoodwillOtherIncreaseDecrease


Goodwill
Period End2020-12-31
Value0
Percentage of GoodwillOtherIncreaseDecrease0.0

us-gaap:ImpairmentOfLeasehold us-gaap:IncomeStatementLocation

us-gaap:ImpairmentOfLeasehold

us-gaap:GeneralAndAdministrativeExpense


Impairment
Period End2020-12-31
Value15
Percentage of ImpairmentOfLeasehold100.0

us-gaap:IncreaseDecreaseInAccruedLiabilities

us-gaap:IncreaseDecreaseInAccruedLiabilities


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value-0.483-2.0783.2310.5931.638-0.6622.7390.065-2.0572.512-3.229-4.5030.59100.0762.6551.6642.5242.6160.842-0.5042.307-0.0570.991-0.0531.323-0.5710.05-0.3521.2240.7610.089
Percentage of IncreaseDecreaseInAccruedLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInContractWithCustomerLiability

us-gaap:IncreaseDecreaseInContractWithCustomerLiability


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value4513551213-21.464326.242712221622102113
Percentage of IncreaseDecreaseInContractWithCustomerLiability100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInEmployeeRelatedLiabilities

us-gaap:IncreaseDecreaseInEmployeeRelatedLiabilities


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value14-20.113201413-9.5417.933-0.9098.887-4.62912-1.6335.091-0.9715.8960.1093.99-2.5965.243-0.2863.164-2.0664.061-0.0960.578-2.8370.5521.7891.8081.6180.2311.035
Percentage of IncreaseDecreaseInEmployeeRelatedLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets

us-gaap:IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value1.2720.467-1.207-0.14.959-1.743-2.6481.8435.383.7740.4532.7424.0613.364-0.0542.0942.5020.513-1.115-0.4598.722-0.8621.3490.92.4680.793-0.5164.577-3.470.853-1.0222.327
Percentage of IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncrementalCommonSharesAttributableToConversionOfDebtSecurities us-gaap:DebtInstrument

us-gaap:IncrementalCommonSharesAttributableToConversionOfDebtSecurities

zen:ConvertibleSeniorNotesDue2023


Incremental
Period End2021-06-302021-03-312020-12-312020-09-30
Value0.02.40.00.0
Percentage of IncrementalCommonSharesAttributableToConversionOfDebtSecurities0.0100.00.00.0

zen:ConvertibleSeniorNotesDue2025


Incremental
Period End2021-06-302021-03-312020-12-312020-09-302020-06-30
Value0.0100.00.010
Percentage of IncrementalCommonSharesAttributableToConversionOfDebtSecurities0.0441.70.00.00.0

us-gaap:OperatingLeaseCost

us-gaap:OperatingLeaseCost


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value5.5065.6225.9856.5736.6746.3436.3196.3825.7945.045
Percentage of OperatingLeaseCost100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingLeasePayments

us-gaap:OperatingLeasePayments


Operating
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value6.956.95324159.552158.3434.176
Percentage of OperatingLeasePayments100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax

us-gaap:OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-30
Value-826000.0-1975000.0-1052000.0-1361000.07573000.0-3395000.0-321000.0161000.02291000.03342000.0673000.0-50000.013000.0-636000.0-213000.080000.013000.0119000.0-35000.0-14000.0129000.0-114000.039000.0-8000.040000.0-5000.0-58000.0-7000.0-2000.021000.0-10000.0
Percentage of OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent

us-gaap:OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent


Other
Period End2021-06-302020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-30
Value-0.8870.643-0.97313-10.7432.155-2.0553.7434.4660.7890.368-3.119-1.39-0.2640.4242.0842.221-3.7610.154-2.8363.472-0.647-0.8430.195
Percentage of OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationBeforeTax

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationBeforeTax


Other
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-30
Value-61000.0-5557000.0388000.06112000.0-7348000.0-2216000.01452000.01124000.0418000.0-3132000.0
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationBeforeTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTax us-gaap:DerivativeInstrumentRisk

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTax

us-gaap:ForeignExchangeForward


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value849000.01743000.0740000.0911000.0-1844000.0-941000.0-741000.0-647000.0-986000.0-1531000.0
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTax us-gaap:DerivativeInstrumentRisk, us-gaap:IncomeStatementLocation

us-gaap:ForeignExchangeForward, us-gaap:CostOfSales


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value400000.0490000.0186000.0163000.0-543000.0-321000.0-304000.0-274000.0-393000.0-474000.0
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTax47.128.125.117.929.434.141.042.339.931.0

us-gaap:ForeignExchangeForward, us-gaap:GeneralAndAdministrativeExpense


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value290000.0417000.0110000.0108000.0-308000.0-174000.0-171000.0-226000.0-221000.0-276000.0
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTax34.223.914.911.916.718.523.134.922.418.0

us-gaap:ForeignExchangeForward, us-gaap:Sales


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value-1373000.0-708000.0-105000.0100000.0725000.0397000.0563000.0652000.0589000.0443000.0
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTax-161.7-40.6-14.211.0-39.3-42.2-76.0-100.8-59.7-28.9

us-gaap:ForeignExchangeForward, us-gaap:SellingAndMarketingExpense


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value1044000.01029000.0363000.0366000.0-1154000.0-562000.0-540000.0-519000.0-630000.0-790000.0
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTax123.059.049.140.262.659.772.980.263.951.6

us-gaap:ForeignExchangeForward, zen:ResearchAndDevelopment


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value488000.0515000.0186000.0174000.0-564000.0-281000.0-289000.0-280000.0-331000.0-434000.0
Percentage of OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTax57.529.525.119.130.629.939.043.333.628.3

us-gaap:OtherComprehensiveIncomeLossDerivativeExcludedComponentIncreaseDecreaseBeforeAdjustmentsTax us-gaap:DerivativeInstrumentRisk

us-gaap:OtherComprehensiveIncomeLossDerivativeExcludedComponentIncreaseDecreaseBeforeAdjustmentsTax

us-gaap:ForeignExchangeForward


Other
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value1000000.0-4000000.01000000.04000000.0-8000000.02000000.0-3000000.0
Percentage of OtherComprehensiveIncomeLossDerivativeExcludedComponentIncreaseDecreaseBeforeAdjustmentsTax100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent

us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-30
Value-0.887-7.5320.643-0.27412-10.7431.638-1.8193.1023.3940.0730.002-2.037-1.39-0.1670.2681.3181.405-3.4660.093-3.073.472-0.647-0.8430.195
Percentage of OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossTaxPortionAttributableToParent1

us-gaap:OtherComprehensiveIncomeLossTaxPortionAttributableToParent1


Other
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-30
Value-699000.0699000.00517000.0-236000.0641000.01072000.0700000.0366000.0-1082000.00-97000.0156000.0766000.0816000.0-295000.061000.0234000.00000
Percentage of OtherComprehensiveIncomeLossTaxPortionAttributableToParent1100.0100.00.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.0

us-gaap:OtherOperatingActivitiesCashFlowStatement

us-gaap:OtherOperatingActivitiesCashFlowStatement


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value1088000.0-965000.0-533000.0983000.03091000.02061000.0-218000.0112000.0452000.0394000.0-17000.0566000.02049000.0250000.0223000.021000.0-338000.0697000.01887000.0620000.0196000.0403000.0932000.0207000.0146000.0172000.06000.0153000.042000.0136000.035000.0123000.0
Percentage of OtherOperatingActivitiesCashFlowStatement100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsRelatedToTaxWithholdingForShareBasedCompensation

us-gaap:PaymentsRelatedToTaxWithholdingForShareBasedCompensation


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value3502000.02800000.02720000.01989000.02241000.01897000.02172000.02323000.02663000.02416000.01447000.01620000.01412000.0734000.0574000.0652000.01609000.0154000.0177000.0281000.0156000.0189000.0128000.0278000.0121000.082000.0367000.0781000.0
Percentage of PaymentsRelatedToTaxWithholdingForShareBasedCompensation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsToAcquireAvailableForSaleSecuritiesDebt

us-gaap:PaymentsToAcquireAvailableForSaleSecuritiesDebt


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value19930514846811112179103125145108342170784252
Percentage of PaymentsToAcquireAvailableForSaleSecuritiesDebt100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsToDevelopSoftware

us-gaap:PaymentsToDevelopSoftware


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value3.074.4684.7454.6183.2253.0582.8342.0411.7531.2131.4551.3891.8172.3442.2841.9221.4631.8521.9971.541.4221.3511.1571.1651.0661.3171.7452.3532.1141.8011.1051.212
Percentage of PaymentsToDevelopSoftware100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromConvertibleDebt

us-gaap:ProceedsFromConvertibleDebt


Proceeds
Period End2020-09-30
Value-0.61
Percentage of ProceedsFromConvertibleDebt100.0

us-gaap:ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities

us-gaap:ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities


Proceeds
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value182198948911774314553473937395527273031157.4956.425106.55712107.523.50.74.851.4
Percentage of ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromSaleOfAvailableForSaleSecuritiesDebt

us-gaap:ProceedsFromSaleOfAvailableForSaleSecuritiesDebt


Proceeds
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value20362410395428571519130311.8666.9822.9467.401
Percentage of ProceedsFromSaleOfAvailableForSaleSecuritiesDebt100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromStockOptionsExercised

us-gaap:ProceedsFromStockOptionsExercised


Proceeds
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value113.9314.532155.1014.0014.5188.7674.7738.4372.8963.5073.5546.193133.3753.486115.526107.4721.9154.8360.7972.0382.9382.1381.7190.9792.3931.1650.395
Percentage of ProceedsFromStockOptionsExercised100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromStockPlans

us-gaap:ProceedsFromStockPlans


Proceeds
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value1115119.9968.802108.4337.7476.8958.4155.4416.054.8535.0963.2683.8413.2953.8442.33.0322.5283.1442.2832.2952.482.468
Percentage of ProceedsFromStockPlans100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability

us-gaap:RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability


Right
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value0.01.397141311272719
Percentage of RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability0.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue

us-gaap:RestrictedStockUnitsRSU


Share
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value0.65146.796.043.02-3.2283.85-0.994.784.7364.882.032.892.5336.9
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod

us-gaap:RestrictedStockUnitsRSU


Share
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value651000.0624000.0588000.0665000.0698000.0694000.0653000.0737000.0814000.0847000.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod us-gaap:AwardType, us-gaap:PlanName

us-gaap:PerformanceShares, zen:PSURetentionPlan


Share
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value037000.0-2000.036000.0026000.0048000.000
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod0.05.9-0.35.40.03.70.06.50.00.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue

us-gaap:RestrictedStockUnitsRSU


Share
Period End2021-06-302021-03-312020-12-31
Value6.459.720.7
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue100.0100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfAdditionalSharesAuthorized

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfAdditionalSharesAuthorized


Share
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value0005654000.00005402000.00005156000.00004833000.0001200000.04516000.00003779000.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfAdditionalSharesAuthorized0.00.00.0100.00.00.00.0100.00.00.00.0100.00.00.00.0100.00.00.0100.0100.00.00.00.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfAdditionalSharesAuthorized us-gaap:AwardType, us-gaap:PlanName

us-gaap:EmployeeStockOption, zen:TwoThousandFourteenPlan


Share
Period End2021-01-012020-01-012019-01-012018-01-012017-01-012016-01-022016-01-012015-01-02
Value5900000.05700000.05400000.05200000.04800000.04500000.04500000.03800000.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfAdditionalSharesAuthorized0.00.00.00.00.00.00.00.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfAdditionalSharesAuthorized us-gaap:AwardType, us-gaap:PlanName, us-gaap:SubsequentEventType

us-gaap:EmployeeStockOption, zen:TwoThousandFourteenPlan, us-gaap:SubsequentEvent


Share
Period End2021-01-012020-01-012019-01-012018-01-012017-01-012016-01-02
Value5900000.05700000.05400000.05200000.04800000.04500000.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfAdditionalSharesAuthorized0.00.00.00.00.00.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfAdditionalSharesAuthorized us-gaap:AwardType, us-gaap:SubsequentEventType

us-gaap:EmployeeStockOption, us-gaap:SubsequentEvent


Share
Period End2021-01-01
Value1200000.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfAdditionalSharesAuthorized0.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfAdditionalSharesAuthorized us-gaap:SubsidiarySaleOfStock

us-gaap:EmployeeStock


Share
Period End2021-01-012020-01-012019-01-012018-01-012017-01-012016-01-022016-01-012015-01-022014-05-31
Value1200000.01100000.01100000.01000000.01000000.0900000.0900000.0800000.0800000.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfAdditionalSharesAuthorized0.00.00.00.00.00.00.00.00.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue


Share
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value462616368.010.0132517216.89.08.013
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod


Share
Period End2021-06-302021-03-312020-12-31
Value99000.013000.04000.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod100.0100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross


Share
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-05-06
Value135000.0276000.025000.052000.064000.0456000.0000336000.035000.00139000.0617000.0205000.0370000.0458000.0170000.050000.0205000.01200000.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross100.0100.0100.0100.0100.0100.00.00.00.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue


Share
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value-1.9554.550.620.26-0.4831.6300028.650.3401.1516.38
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue100.0100.0100.0100.0100.0100.00.00.00.0100.0100.00.0100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardSharesIssuedInPeriod us-gaap:SubsidiarySaleOfStock

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardSharesIssuedInPeriod

us-gaap:EmployeeStock


Share
Period End2021-05-312020-09-302020-05-312020-06-30
Value400000.00400000.0400000.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardSharesIssuedInPeriod100.00.0100.0100.0

us-gaap:ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice

us-gaap:ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice


Share
Period End2021-06-302021-03-312020-12-31
Value5.9918.910.16
Percentage of ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice100.0100.0100.0

us-gaap:ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice

us-gaap:ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice


Share
Period End2021-06-302021-03-312020-12-31
Value-23.79123.261.03
Percentage of ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice100.0100.0100.0

us-gaap:ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice

us-gaap:ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice


Share
Period End2021-06-302021-03-312020-12-31
Value-6.0154.051.72
Percentage of ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice100.0100.0100.0

us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueVested us-gaap:AwardType

us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueVested

us-gaap:RestrictedStockUnitsRSU


Sharebased
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value9291736152554959696353494430
Percentage of SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueVested100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ShortTermLeaseCost

us-gaap:ShortTermLeaseCost


Short
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value128000.0128000.0126000.0128000.0138000.0185000.0256000.0168000.0995000.0874000.0
Percentage of ShortTermLeaseCost100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans us-gaap:StatementEquityComponents

us-gaap:StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans

us-gaap:CommonStock


Stock
Period End2021-06-302020-12-312020-09-302020-06-302019-12-312019-09-302019-06-302018-12-312018-09-302018-06-30
Value380000.0276000.00353000.0273000.00374000.0338000.00390000.0
Percentage of StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans100.0100.00.0100.0100.00.0100.0100.00.0100.0

us-gaap:StockIssuedDuringPeriodSharesStockOptionsExercised

us-gaap:StockIssuedDuringPeriodSharesStockOptionsExercised


Stock
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value399000.0208000.0162000.0578000.0159000.0175000.0237000.0434000.0250000.0376000.0
Percentage of StockIssuedDuringPeriodSharesStockOptionsExercised100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StockIssuedDuringPeriodSharesStockOptionsExercised us-gaap:StatementEquityComponents

us-gaap:CommonStock


Stock
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value400000.0208000.0163000.0577000.0159000.0175000.0237000.0433000.0250000.0376000.0163000.0187000.0220000.0454000.0
Percentage of StockIssuedDuringPeriodSharesStockOptionsExercised100.3100.0100.699.8100.0100.0100.099.8100.0100.00.00.00.00.0

us-gaap:StockIssuedDuringPeriodValueEmployeeStockPurchasePlan

us-gaap:StockIssuedDuringPeriodValueEmployeeStockPurchasePlan


Stock
Period End2021-06-302020-12-312020-09-302020-06-302019-12-312019-09-302019-06-302018-12-312018-09-302018-06-30
Value27180.019140.01510-0.0019.474
Percentage of StockIssuedDuringPeriodValueEmployeeStockPurchasePlan100.0100.00.0100.0100.00.0100.0100.0100.0100.0

us-gaap:StockIssuedDuringPeriodValueEmployeeStockPurchasePlan us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Stock
Period End2021-06-302020-12-312020-09-302020-06-302019-12-312019-09-302019-06-302018-12-312018-09-302018-06-30
Value27180.019140.01510-0.0019.47
Percentage of StockIssuedDuringPeriodValueEmployeeStockPurchasePlan100.0100.00.0100.0100.00.0100.0100.0100.0100.0

us-gaap:CommonStock


Stock
Period End2021-06-302020-12-312020-09-302020-06-302019-12-312019-09-302019-06-302018-12-312018-09-302018-06-30
Value0.0040.0020.00.0040.0020.00.0040.0030.00.004
Percentage of StockIssuedDuringPeriodValueEmployeeStockPurchasePlan0.00.00.00.00.00.00.00.0-0.00.0

us-gaap:StockIssuedDuringPeriodValueStockOptionsExercised

us-gaap:StockIssuedDuringPeriodValueStockOptionsExercised


Stock
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value113.9314.532155.1034.0014.5188.7674.7728.4382.8953.5083.5536.193
Percentage of StockIssuedDuringPeriodValueStockOptionsExercised100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StockIssuedDuringPeriodValueStockOptionsExercised us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Stock
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value113.9294.53155.1013.9994.5168.7634.778.4342.8943.5063.5516.189
Percentage of StockIssuedDuringPeriodValueStockOptionsExercised100.099.9100.0100.0100.0100.0100.0100.0100.0100.0100.099.999.999.9

us-gaap:CommonStock


Stock
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value0.0040.0020.0020.0060.0020.0020.0020.0040.0020.0040.0010.0020.0020.004
Percentage of StockIssuedDuringPeriodValueStockOptionsExercised0.00.10.00.00.00.00.00.00.00.00.00.10.10.1

us-gaap:StockholdersEquityOther

us-gaap:StockholdersEquityOther


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-30
Value-61000.0-223000.02000.0-15000.0-76000.0
Percentage of StockholdersEquityOther100.0100.0100.0100.0100.0

us-gaap:StockholdersEquityOther us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Stockholders
Period End2020-12-312020-09-30
Value3000.0-15000.0
Percentage of StockholdersEquityOther150.0100.0

us-gaap:RetainedEarnings


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-30
Value-61000.0-223000.0-1000.01000.0-76000.0
Percentage of StockholdersEquityOther100.0100.0-50.0-6.7100.0

us-gaap:SubleaseIncome

us-gaap:SubleaseIncome


Sublease
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value434000.0440000.0541000.0422000.0395000.0464000.0615000.0560000.0392000.0401000.0
Percentage of SubleaseIncome100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:VariableLeaseCost

us-gaap:VariableLeaseCost


Variable
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value1244000.01218000.01547000.01412000.01659000.01543000.01772000.01607000.02343000.0885000.0
Percentage of VariableLeaseCost100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

zen:AccountsReceivableCreditLossExpenseReversalCurrent

zen:AccountsReceivableCreditLossExpenseReversalCurrent


Accounts
Period End2021-06-302021-03-312020-06-302020-03-31
Value1.3273.1683.3492.265
Percentage of AccountsReceivableCreditLossExpenseReversalCurrent100.0100.0100.0100.0

zen:AdjustmentsToAdditionalPaidInCapitalProceedsFromCappedCallTransactions

zen:AdjustmentsToAdditionalPaidInCapitalProceedsFromCappedCallTransactions


Adjustments
Period End2020-12-312020-09-302020-06-30
Value0.00.083
Percentage of AdjustmentsToAdditionalPaidInCapitalProceedsFromCappedCallTransactions0.00.0100.0

zen:AdjustmentsToAdditionalPaidInCapitalProceedsFromCappedCallTransactions us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Adjustments
Period End2020-12-312020-09-302020-06-30
Value0.00.083
Percentage of AdjustmentsToAdditionalPaidInCapitalProceedsFromCappedCallTransactions0.00.0100.0

zen:AdjustmentsToAdditionalPaidInCapitalPurchaseOfCappedCallTransactions

zen:AdjustmentsToAdditionalPaidInCapitalPurchaseOfCappedCallTransactions


Adjustments
Period End2020-12-312020-09-302020-06-30
Value0.00.0129
Percentage of AdjustmentsToAdditionalPaidInCapitalPurchaseOfCappedCallTransactions0.00.0100.0

zen:AdjustmentsToAdditionalPaidInCapitalPurchaseOfCappedCallTransactions us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Adjustments
Period End2020-12-312020-09-302020-06-30
Value0.00.0129
Percentage of AdjustmentsToAdditionalPaidInCapitalPurchaseOfCappedCallTransactions0.00.0100.0

zen:AdjustmentsToAdditionalPaidInCapitalRepurchaseOfConvertibleDebtWithConversionFeature

zen:AdjustmentsToAdditionalPaidInCapitalRepurchaseOfConvertibleDebtWithConversionFeature


Adjustments
Period End2020-12-312020-09-302020-06-30
Value0.00.0224
Percentage of AdjustmentsToAdditionalPaidInCapitalRepurchaseOfConvertibleDebtWithConversionFeature0.00.0100.0

zen:AdjustmentsToAdditionalPaidInCapitalRepurchaseOfConvertibleDebtWithConversionFeature us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Adjustments
Period End2020-12-312020-09-302020-06-30
Value0.00.0224
Percentage of AdjustmentsToAdditionalPaidInCapitalRepurchaseOfConvertibleDebtWithConversionFeature0.00.0100.0

zen:ContractwithCustomerLiabilityBillings

zen:ContractwithCustomerLiabilityBillings


Contractwith
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value364311339273259216260216222193194172
Percentage of ContractwithCustomerLiabilityBillings100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

zen:ContractwithCustomerLiabilityOtherRevenueRecognized

zen:ContractwithCustomerLiabilityOtherRevenueRecognized


Contractwith
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value1513121213138.9799.0238.6327.4016.728
Percentage of ContractwithCustomerLiabilityOtherRevenueRecognized100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

zen:IncreaseDecreaseInCapitalizedContractCost

zen:IncreaseDecreaseInCapitalizedContractCost


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value32203018141314101410149.137107.0437.1675.9865.5074.102
Percentage of IncreaseDecreaseInCapitalizedContractCost100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

zen:IncreaseDecreaseInOperatingLeaseLiability

zen:IncreaseDecreaseInOperatingLeaseLiability


Increase
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value5.5387.175.1753.5348.7943.8438.6312.5623.832
Percentage of IncreaseDecreaseInOperatingLeaseLiability100.0100.0100.0100.0100.0100.0100.0100.0100.0

zen:IncreaseDecreaseInOperatingLeaseRightOfUseAsset

zen:IncreaseDecreaseInOperatingLeaseRightOfUseAsset


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value4.3544.4644.95.2255.2724.9754.9184.9154.7344.373
Percentage of IncreaseDecreaseInOperatingLeaseRightOfUseAsset100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

zen:IssuanceOfCommonStockForSettlementOfRestrictedStockUnitShares us-gaap:StatementEquityComponents

zen:IssuanceOfCommonStockForSettlementOfRestrictedStockUnitShares

us-gaap:CommonStock


Issuance
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value651000.0661000.0587000.0700000.0698000.0720000.0653000.0786000.0814000.0847000.0910000.0757000.0810000.0688000.0
Percentage of IssuanceOfCommonStockForSettlementOfRestrictedStockUnitShares100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

zen:IssuanceOfCommonStockForSettlementOfRestrictedStockUnitsValue

zen:IssuanceOfCommonStockForSettlementOfRestrictedStockUnitsValue


Issuance
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value-3504000.0-2799000.0-2718000.0-1990000.0-2241000.0-1897000.0-2172000.0-2321000.0-2663000.0-2417000.0-1447000.0-1619000.0-1413000.0-734000.0
Percentage of IssuanceOfCommonStockForSettlementOfRestrictedStockUnitsValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

zen:IssuanceOfCommonStockForSettlementOfRestrictedStockUnitsValue us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Issuance
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value-3510000.0-2806000.0-2724000.0-1998000.0-2248000.0-1904000.0-2179000.0-2330000.0-2671000.0-2425000.0-1457000.0-1627000.0-1421000.0-741000.0
Percentage of IssuanceOfCommonStockForSettlementOfRestrictedStockUnitsValue100.2100.3100.2100.4100.3100.4100.3100.4100.3100.3100.7100.5100.6101.0

us-gaap:CommonStock


Issuance
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value6000.07000.06000.08000.07000.07000.07000.09000.08000.08000.010000.08000.08000.07000.0
Percentage of IssuanceOfCommonStockForSettlementOfRestrictedStockUnitsValue-0.2-0.3-0.2-0.4-0.3-0.4-0.3-0.4-0.3-0.3-0.7-0.5-0.6-1.0

zen:PaymentsForCappedCall

zen:PaymentsForCappedCall


Payments
Period End2020-09-302019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value0.00.00.00.00.00.00.00.0630.00.00.00.0
Percentage of PaymentsForCappedCall0.00.00.00.00.00.00.00.0100.00.00.00.00.0

zen:PaymentsForLeaseTermination

zen:PaymentsForLeaseTermination


Payments
Period End2021-06-30
Value7000000.0
Percentage of PaymentsForLeaseTermination100.0

zen:PaymentsForLeaseTermination us-gaap:SubsequentEventType

us-gaap:SubsequentEvent


Payments
Period End2021-04-30
Value7000000.0
Percentage of PaymentsForLeaseTermination0.0

zen:PaymentsToAcquireEquitySecuritiesWithoutReadilyDeterminableFairValue

zen:PaymentsToAcquireEquitySecuritiesWithoutReadilyDeterminableFairValue


Payments
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value0001500000.0000500000.010000000.0000
Percentage of PaymentsToAcquireEquitySecuritiesWithoutReadilyDeterminableFairValue0.00.00.0100.00.00.00.0100.0100.00.00.00.0

zen:ProceedsFromCappedCall

zen:ProceedsFromCappedCall


Proceeds
Period End2020-09-30
Value0.0
Percentage of ProceedsFromCappedCall0.0

zen:ProceedsFromSaleOfEquitySecuritiesWithoutReadilyDeterminableFairValue

zen:ProceedsFromSaleOfEquitySecuritiesWithoutReadilyDeterminableFairValue


Proceeds
Period End2020-12-312020-09-30
Value02000000.0
Percentage of ProceedsFromSaleOfEquitySecuritiesWithoutReadilyDeterminableFairValue0.0100.0

zen:PropertyAndEquipmentAcquiredThroughTenantImprovementAllowance

zen:PropertyAndEquipmentAcquiredThroughTenantImprovementAllowance


Property
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value00110000.000065000.0349000.0205000.01174000.02891000.01370000.0210000.0-869000.0612000.0694000.0173000.064000.0-563000.0563000.0000174000.00378000.02970000.0584000.0
Percentage of PropertyAndEquipmentAcquiredThroughTenantImprovementAllowance0.00.0100.00.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.0100.00.0100.0100.0100.0

zen:RealizedGainsLossesFromSaleOfEquitySecuritiesWithoutReadilyDeterminableFairValue

zen:RealizedGainsLossesFromSaleOfEquitySecuritiesWithoutReadilyDeterminableFairValue


Realized
Period End2020-09-30
Value1000000.0
Percentage of RealizedGainsLossesFromSaleOfEquitySecuritiesWithoutReadilyDeterminableFairValue100.0

zen:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedAndUnavailableForGrantInPeriod us-gaap:AwardType

zen:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedAndUnavailableForGrantInPeriod

us-gaap:RestrictedStockUnitsRSU


Share
Period End2020-12-31
Value0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedAndUnavailableForGrantInPeriod0.0

zen:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedAndUnavailableForGrantWeightedAverageGrantDateFairValue us-gaap:AwardType

zen:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedAndUnavailableForGrantWeightedAverageGrantDateFairValue

us-gaap:RestrictedStockUnitsRSU


Share
Period End2020-12-31
Value0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedAndUnavailableForGrantWeightedAverageGrantDateFairValue0.0

zen:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedOrCanceledInPeriod us-gaap:AwardType

zen:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedOrCanceledInPeriod

us-gaap:RestrictedStockUnitsRSU


Share
Period End2021-06-302021-03-312020-12-31
Value280000.0228000.0240000.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedOrCanceledInPeriod100.0100.0100.0

zen:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedOrCanceledWeightedAverageGrantDateFairValue us-gaap:AwardType

zen:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedOrCanceledWeightedAverageGrantDateFairValue

us-gaap:RestrictedStockUnitsRSU


Share
Period End2021-06-302021-03-312020-12-31
Value5.6177.552.15
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedOrCanceledWeightedAverageGrantDateFairValue100.0100.0100.0

zen:ShareBasedCompensationArrangementByShareBasedPaymentAwardRestrictedStockUnitsForfeitedFromSharesAvailableForGrant

zen:ShareBasedCompensationArrangementByShareBasedPaymentAwardRestrictedStockUnitsForfeitedFromSharesAvailableForGrant


Share
Period End2020-12-312020-09-302020-06-302020-03-31
Value240000.0237000.0106000.0212000.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardRestrictedStockUnitsForfeitedFromSharesAvailableForGrant100.0100.0100.0100.0

zen:ShareBasedCompensationArrangementByShareBasedPaymentAwardRestrictedStockUnitsForfeitedFromSharesAvailableForGrant us-gaap:AwardType

us-gaap:PerformanceShares


Share
Period End2020-09-302020-06-302020-03-31
Value10000.0025000.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardRestrictedStockUnitsForfeitedFromSharesAvailableForGrant4.20.011.8

zen:ShareBasedCompensationArrangementByShareBasedPaymentAwardRestrictedStockUnitsGrantedFromSharesAvailableForGrant

zen:ShareBasedCompensationArrangementByShareBasedPaymentAwardRestrictedStockUnitsGrantedFromSharesAvailableForGrant


Share
Period End2020-12-31
Value798000.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardRestrictedStockUnitsGrantedFromSharesAvailableForGrant100.0

zen:ShareBasedCompensationArrangementByShareBasedPaymentAwardSharesForfeitedFromSharesAvailableForGrant

zen:ShareBasedCompensationArrangementByShareBasedPaymentAwardSharesForfeitedFromSharesAvailableForGrant


Share
Period End2020-12-31
Value4000.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardSharesForfeitedFromSharesAvailableForGrant100.0

zen:ShareBasedCompensationArrangementByShareBasedPaymentAwardSharesGrantedFromSharesAvailableForGrant

zen:ShareBasedCompensationArrangementByShareBasedPaymentAwardSharesGrantedFromSharesAvailableForGrant


Share
Period End2020-12-312018-12-31
Value25000.035000.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardSharesGrantedFromSharesAvailableForGrant100.0100.0

us-gaap:AllowanceForDoubtfulAccountsReceivable

us-gaap:AllowanceForDoubtfulAccountsReceivable


Allowance
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value6015000.07316000.05787000.09322000.07914000.06000000.03000000.0
Percentage of AllowanceForDoubtfulAccountsReceivable100.0100.0100.0100.0100.0100.0100.0

us-gaap:AllowanceForDoubtfulAccountsReceivableCurrent

us-gaap:AllowanceForDoubtfulAccountsReceivableCurrent


Allowance
Period End2020-12-312020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302013-12-312012-12-31
Value5787000.05796000.02846000.02715000.03252000.03060000.02571000.02862000.02478000.01445000.01252000.0751000.0919000.02264000.01269000.01213000.0834000.0900000.0763000.01070000.0626000.0475000.0264000.0355000.0361000.0282000.0173000.0
Percentage of AllowanceForDoubtfulAccountsReceivableCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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

us-gaap:AssetsFairValueDisclosure

us-gaap:AssetBackedSecurities, us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value10610710192931181241201301401271107027
Percentage of AssetsFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-312019-06-302019-03-312018-12-312018-09-30
Value7.75710105.50.9971.1440.651.153.22.25
Percentage of AssetsFairValueDisclosure7.39.710.56.01.10.90.50.82.52.0

us-gaap:CommercialPaper, us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value212236494712137.9616.9271338516919
Percentage of AssetsFairValueDisclosure19.921.036.554.150.610.610.96.65.310.030.646.799.970.7

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


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value415387366368380401418428436474460443248149
Percentage of AssetsFairValueDisclosure390.9360.9362.2400.6405.9337.6337.0355.3334.7338.3362.1400.7355.1537.4

us-gaap:MoneyMarketFunds, us-gaap:FairValueInputsLevel1, us-gaap:FairValueMeasurementsRecurring


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value22622016217547912570656358575636832
Percentage of AssetsFairValueDisclosure213.4205.9160.2190.8511.4106.056.854.648.641.845.550.6526.4118.4

us-gaap:USGovernmentAgenciesDebtSecurities, us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value9695808131260.920.2211111152614
Percentage of AssetsFairValueDisclosure90.689.179.488.034.122.40.70.28.18.914.037.853.8

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


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value417445431414122789475556458503428
Percentage of AssetsFairValueDisclosure393.3415.5425.8450.2131.066.476.462.942.945.745.745.848.9102.3

us-gaap:AssetsFairValueDisclosure us-gaap:FairValueByAssetClass, us-gaap:FairValueByMeasurementFrequency

us-gaap:AssetBackedSecurities, us-gaap:FairValueMeasurementsRecurring


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value10610710192931181241201301401271107027
Percentage of AssetsFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CertificatesOfDeposit, us-gaap:FairValueMeasurementsRecurring


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-312019-06-302019-03-312018-12-312018-09-30
Value7.75710105.50.9971.1440.651.153.22.25
Percentage of AssetsFairValueDisclosure7.39.710.56.01.10.90.50.82.52.0

us-gaap:CommercialPaper, us-gaap:FairValueMeasurementsRecurring


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value212236494712137.9616.9271338516919
Percentage of AssetsFairValueDisclosure19.921.036.554.150.610.610.96.65.310.030.646.799.970.7

us-gaap:CorporateDebtSecurities, us-gaap:FairValueMeasurementsRecurring


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value415387366368380401418428436474460443248149
Percentage of AssetsFairValueDisclosure390.9360.9362.2400.6405.9337.6337.0355.3334.7338.3362.1400.7355.1537.4

us-gaap:MoneyMarketFunds, us-gaap:FairValueMeasurementsRecurring


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value22622016217547912570656358575636832
Percentage of AssetsFairValueDisclosure213.4205.9160.2190.8511.4106.056.854.648.641.845.550.6526.4118.4

us-gaap:USGovernmentAgenciesDebtSecurities, us-gaap:FairValueMeasurementsRecurring


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value9695808131260.920.2211111152614
Percentage of AssetsFairValueDisclosure90.689.179.488.034.122.40.70.28.18.914.037.853.8

us-gaap:USTreasurySecurities, us-gaap:FairValueMeasurementsRecurring


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value417445431414122789475556458503428
Percentage of AssetsFairValueDisclosure393.3415.5425.8450.2131.066.476.462.942.945.745.745.848.9102.3

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

us-gaap:FairValueInputsLevel1, us-gaap:FairValueMeasurementsRecurring


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value2262201621750.012570656358575636832
Percentage of AssetsFairValueDisclosure213.4205.9160.2190.80.0106.056.854.648.641.845.550.6526.4118.4

us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value1063106810261011677638652632629705698674449239
Percentage of AssetsFairValueDisclosure1002.0996.11014.41098.7722.6537.0525.9525.0483.5502.8549.8609.2641.6864.2

us-gaap:AssetsFairValueDisclosure us-gaap:FairValueByMeasurementFrequency

us-gaap:FairValueMeasurementsRecurring


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value12901289118911871156764722698693763756730817272
Percentage of AssetsFairValueDisclosure1215.41202.11174.61289.61234.0643.0582.7579.6532.1544.6595.3659.71168.0982.6

us-gaap:AvailableForSaleDebtSecuritiesAmortizedCostBasis

us-gaap:AvailableForSaleDebtSecuritiesAmortizedCostBasis


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value12871285118311811148763719
Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis100.0100.0100.0100.0100.0100.0100.0

us-gaap:CapitalizedComputerSoftwareNet

us-gaap:CapitalizedComputerSoftwareNet


Capitalized
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302013-12-31
Value37353230272523202019191918171716151515151414141414141312106.8
Percentage of CapitalizedComputerSoftwareNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CapitalizedContractCostNet

us-gaap:CapitalizedContractCostNet


Capitalized
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value128111105877975716562555143393331
Percentage of CapitalizedContractCostNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CapitalizedContractCostNetCurrent

us-gaap:CapitalizedContractCostNetCurrent


Capitalized
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value6255514440383532302624211915
Percentage of CapitalizedContractCostNetCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CapitalizedContractCostNetNoncurrent

us-gaap:CapitalizedContractCostNetNoncurrent


Capitalized
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value6555524238363532312826222015
Percentage of CapitalizedContractCostNetNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CashAndCashEquivalentsFairValueDisclosure us-gaap:FairValueByMeasurementFrequency

us-gaap:CashAndCashEquivalentsFairValueDisclosure

us-gaap:FairValueMeasurementsRecurring


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-12-31
Value23422719422055612573706660627643739237175.2653.8253.5454.8413518212521
Percentage of CashAndCashEquivalentsFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ContractWithCustomerLiability

us-gaap:ContractWithCustomerLiability


Contract
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-312016-12-31
Value442396383327316303323292287259247225207174122
Percentage of ContractWithCustomerLiability100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ContractWithCustomerLiabilityNoncurrent

us-gaap:ContractWithCustomerLiabilityNoncurrent


Contract
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value3684000.03065000.04423000.02885000.01934000.01941000.03320000.02662000.0797000.01865000.02719000.02551000.01504000.01334000.01213000.0
Percentage of ContractWithCustomerLiabilityNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ContractualObligation

us-gaap:ContractualObligation


Contractual
Period End2020-12-31
Value1649
Percentage of ContractualObligation100.0

us-gaap:ContractualObligation us-gaap:ProductOrService

zen:CloudInfrastructure


Contractual
Period End2021-04-30
Value64
Percentage of ContractualObligation0.0

us-gaap:ContractualObligation us-gaap:ProductOrService, us-gaap:SubsequentEventType

zen:CloudInfrastructure, us-gaap:SubsequentEvent


Contractual
Period End2021-04-30
Value64
Percentage of ContractualObligation0.0

us-gaap:ContractualObligationDueAfterFifthYear

us-gaap:ContractualObligationDueAfterFifthYear


Contractual
Period End2020-12-31
Value32
Percentage of ContractualObligationDueAfterFifthYear100.0

us-gaap:ContractualObligationDueInFifthYear

us-gaap:ContractualObligationDueInFifthYear


Contractual
Period End2020-12-31
Value1161
Percentage of ContractualObligationDueInFifthYear100.0

us-gaap:ContractualObligationDueInFourthYear

us-gaap:ContractualObligationDueInFourthYear


Contractual
Period End2020-12-31
Value16
Percentage of ContractualObligationDueInFourthYear100.0

us-gaap:ContractualObligationDueInNextTwelveMonths

us-gaap:ContractualObligationDueInNextTwelveMonths


Contractual
Period End2020-12-31
Value121
Percentage of ContractualObligationDueInNextTwelveMonths100.0

us-gaap:ContractualObligationDueInSecondYear

us-gaap:ContractualObligationDueInSecondYear


Contractual
Period End2020-12-31
Value98
Percentage of ContractualObligationDueInSecondYear100.0

us-gaap:ContractualObligationDueInThirdYear

us-gaap:ContractualObligationDueInThirdYear


Contractual
Period End2020-12-31
Value218
Percentage of ContractualObligationDueInThirdYear100.0

us-gaap:ConvertibleDebtCurrent

us-gaap:ConvertibleDebtCurrent


Convertible
Period End2021-06-302021-03-312020-12-312020-09-302019-06-302018-12-31
Value1361341321304700.0
Percentage of ConvertibleDebtCurrent100.0100.0100.0100.0100.00.0

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

us-gaap:DebtInstrumentCarryingAmount

zen:ConvertibleSeniorNotesDue2023, us-gaap:ConvertibleDebt


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value1491491491491495755755755755755755755755750.0
Percentage of DebtInstrumentCarryingAmount100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

zen:ConvertibleSeniorNotesDue2025, us-gaap:ConvertibleDebt


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value115011501150115011500.0
Percentage of DebtInstrumentCarryingAmount771.8771.8771.8771.8771.80.0

us-gaap:DebtInstrumentConvertibleCarryingAmountOfTheEquityComponent us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:DebtInstrumentConvertibleCarryingAmountOfTheEquityComponent

zen:ConvertibleSeniorNotesDue2023, us-gaap:ConvertibleDebt


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312018-03-152017-12-31
Value32323232321241241241241241241241241241250.0
Percentage of DebtInstrumentConvertibleCarryingAmountOfTheEquityComponent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

zen:ConvertibleSeniorNotesDue2025, us-gaap:ConvertibleDebt


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value2202202202202200.0
Percentage of DebtInstrumentConvertibleCarryingAmountOfTheEquityComponent678.6678.6678.6678.6678.40.0

us-gaap:DebtInstrumentFaceAmount us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:DebtInstrumentFaceAmount

zen:ConvertibleSeniorNotesDue2023, us-gaap:ConvertibleDebt


Debt
Period End2021-06-302021-03-312020-09-302019-12-312018-03-31
Value19216594575575
Percentage of DebtInstrumentFaceAmount100.0100.0100.0100.0100.0

zen:ConvertibleSeniorNotesDue2025, us-gaap:ConvertibleDebt


Debt
Period End2021-06-302021-03-312020-09-302020-06-30
Value37625211501150
Percentage of DebtInstrumentFaceAmount195.8152.71223.40.0

us-gaap:DebtInstrumentInterestRateEffectivePercentage us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:DebtInstrumentInterestRateEffectivePercentage

zen:ConvertibleSeniorNotesDue2023, us-gaap:ConvertibleDebt


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-30
Value5.265.265.265.260.0526
Percentage of DebtInstrumentInterestRateEffectivePercentage100.0100.0100.0100.0100.0

zen:ConvertibleSeniorNotesDue2025, us-gaap:ConvertibleDebt


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-30
Value5.05.05.05.00.05
Percentage of DebtInstrumentInterestRateEffectivePercentage95.195.195.195.195.1

us-gaap:DebtInstrumentUnamortizedDiscountPremiumNet us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:DebtInstrumentUnamortizedDiscountPremiumNet

zen:ConvertibleSeniorNotesDue2023, us-gaap:ConvertibleDebt


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value1213151718778490951011071131181240.0
Percentage of DebtInstrumentUnamortizedDiscountPremiumNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

zen:ConvertibleSeniorNotesDue2025, us-gaap:ConvertibleDebt


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value1781881982082180.0
Percentage of DebtInstrumentUnamortizedDiscountPremiumNet1481.41374.51291.81226.01172.40.0

us-gaap:DebtSecuritiesAvailableForSaleAccruedInterestAfterAllowanceForCreditLoss

us-gaap:DebtSecuritiesAvailableForSaleAccruedInterestAfterAllowanceForCreditLoss


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value3000000.03000000.03000000.03000000.03000000.04000000.0
Percentage of DebtSecuritiesAvailableForSaleAccruedInterestAfterAllowanceForCreditLoss100.0100.0100.0100.0100.0100.0

us-gaap:DebtSecuritiesAvailableForSaleUnrealizedLossPosition

us-gaap:DebtSecuritiesAvailableForSaleUnrealizedLossPosition


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value3022301071475824645
Percentage of DebtSecuritiesAvailableForSaleUnrealizedLossPosition100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsGross

us-gaap:DeferredTaxAssetsGross


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value34327019913197704322
Percentage of DeferredTaxAssetsGross100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsOperatingLossCarryforwards

us-gaap:DeferredTaxAssetsOperatingLossCarryforwards


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value29423017011573533319
Percentage of DeferredTaxAssetsOperatingLossCarryforwards100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsOperatingLossCarryforwardsNotSubjectToExpiration

us-gaap:DeferredTaxAssetsOperatingLossCarryforwardsNotSubjectToExpiration


Deferred
Period End2020-12-31
Value710
Percentage of DeferredTaxAssetsOperatingLossCarryforwardsNotSubjectToExpiration100.0

us-gaap:DeferredTaxAssetsOperatingLossCarryforwardsSubjectToExpiration

us-gaap:DeferredTaxAssetsOperatingLossCarryforwardsSubjectToExpiration


Deferred
Period End2020-12-31
Value520
Percentage of DeferredTaxAssetsOperatingLossCarryforwardsSubjectToExpiration100.0

us-gaap:DeferredTaxAssetsOther

us-gaap:DeferredTaxAssetsOther


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value825000.09164000.07066000.05086000.05325000.02609000.0600000.0677000.0
Percentage of DeferredTaxAssetsOther100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsPropertyPlantAndEquipment

us-gaap:DeferredTaxAssetsPropertyPlantAndEquipment


Deferred
Period End2020-12-312019-12-312018-12-312017-12-31
Value4850000.02329000.03340000.01983000.0
Percentage of DeferredTaxAssetsPropertyPlantAndEquipment100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsTaxCreditCarryforwards

us-gaap:DeferredTaxAssetsTaxCreditCarryforwards


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value3311000.01138000.0884000.0733000.0762000.0266000.0197000.015000.0
Percentage of DeferredTaxAssetsTaxCreditCarryforwards100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost

us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value1010106.07213105.3110.771
Percentage of DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccruals

us-gaap:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccruals


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value7222000.05075000.07734000.03968000.04877000.03840000.03710000.01316000.0
Percentage of DeferredTaxAssetsTaxDeferredExpenseReservesAndAccruals100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets

us-gaap:DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets


Deferred
Period End2020-12-312019-12-312018-12-312017-12-31
Value8.629.294115.036
Percentage of DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets100.0100.0100.0100.0

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

us-gaap:DerivativeAssets

us-gaap:OtherCurrentAssets, us-gaap:ForeignExchangeForward, us-gaap:FairValueInputsLevel2, us-gaap:DesignatedAsHedgingInstrument


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-31
Value3134000.04423000.07922000.04042000.03126000.03852000.02385000.02502000.01905000.01842000.02047000.01731000.01791000.02716000.02359000.02459000.01376000.0729000.0868000.01215000.0963000.0408000.0
Percentage of DerivativeAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeAssets us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:HedgingDesignation

us-gaap:FairValueInputsLevel2, us-gaap:DesignatedAsHedgingInstrument


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-31
Value3134000.04423000.07922000.04042000.03126000.03852000.02385000.02502000.01905000.01842000.02047000.01731000.01791000.02716000.02359000.02459000.01376000.0729000.0868000.01294000.0997000.0408000.0
Percentage of DerivativeAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0106.5103.5100.0

us-gaap:DerivativeLiabilities us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentRisk, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:HedgingDesignation

us-gaap:DerivativeLiabilities

us-gaap:AccountsPayableAndAccruedLiabilities, us-gaap:ForeignExchangeForward, us-gaap:FairValueInputsLevel2, us-gaap:DesignatedAsHedgingInstrument


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-31
Value4.5516.7595.7683.8824.262101.9755.1292.53.7264.8624.5934.461.9451.221.8731.5072.744.281.6881.6241.081
Percentage of DerivativeLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeLiabilities us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:HedgingDesignation

us-gaap:FairValueInputsLevel2, us-gaap:DesignatedAsHedgingInstrument


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-31
Value4.5516.7595.7683.8824.262101.9755.1292.53.7264.8624.5934.461.9451.221.8731.5072.744.282.0182.1291.081
Percentage of DerivativeLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0119.5131.1100.0

us-gaap:DerivativeNotionalAmount us-gaap:DerivativeInstrumentRisk

us-gaap:DerivativeNotionalAmount

us-gaap:ForeignExchangeForward


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value425396345280292318260228227200
Percentage of DerivativeNotionalAmount100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EmployeeRelatedLiabilitiesCurrent

us-gaap:EmployeeRelatedLiabilitiesCurrent


Employee
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302013-12-31
Value95971038964616158515046393333292621212017151514119.67411119.6617.9714.226
Percentage of EmployeeRelatedLiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized


Employee
Period End2021-06-302021-03-312020-12-312020-09-30
Value498509404373
Percentage of EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized100.0100.0100.0100.0

us-gaap:EquitySecuritiesWithoutReadilyDeterminableFairValueAmount

us-gaap:EquitySecuritiesWithoutReadilyDeterminableFairValueAmount


Equity
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-31
Value1111111112121111111110.00.0
Percentage of EquitySecuritiesWithoutReadilyDeterminableFairValueAmount100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

us-gaap:FiniteLivedIntangibleAssetsAccumulatedAmortization

us-gaap:FiniteLivedIntangibleAssetsAccumulatedAmortization


Finite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
Value212321181522201714119.7677.5496.3941211109.6568.5847.6286.6515.6734.7063.742.8282.3721.921.4070.9910.529
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FiniteLivedIntangibleAssetsAccumulatedAmortization us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:CustomerRelationships


Finite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
Value7.366.7186.0765.4244.7534.5823.8823.1832.4851.8271.2490.6790.4431.6851.5491.4141.281.1511.0440.9340.8240.7150.6060.4970.4150.3340.2440.1720.092
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization33.528.728.229.929.819.919.218.317.115.312.89.06.913.813.613.313.313.413.714.014.515.216.217.617.517.417.317.417.4

us-gaap:DevelopedTechnologyRights


Finite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
Value1413129.8338.615161412119.4928.1516.8075.951109.8359.2258.3767.4336.5845.7174.8493.9913.1332.2711.8971.5261.1180.7870.42
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization66.557.857.754.154.070.571.873.676.179.483.590.293.186.286.486.786.786.686.386.085.584.883.880.380.079.579.579.479.4

us-gaap:OrderOrProductionBacklog


Finite
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value3.1583.0332.9082.62.21.81.41.00.6420.3670.063
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization13.514.116.016.39.68.98.16.95.43.80.8

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive


Finite
Period End2020-12-31
Value649000.0
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths


Finite
Period End2021-06-302021-03-312020-12-312020-09-30
Value6942000.06942000.07115000.07603000.0
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths100.0100.0100.0100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear


Finite
Period End2021-06-302021-03-312020-09-30
Value3494000.05272000.02011000.0
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear100.0100.0100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFive

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFive


Finite
Period End2020-12-31
Value972000.0
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseYearFive100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFour

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFour


Finite
Period End2021-06-302021-03-312020-12-312020-09-30
Value972000.0972000.04618000.04616000.0
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseYearFour100.0100.0100.0100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearThree

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearThree


Finite
Period End2021-06-302021-03-312020-12-312020-09-30
Value4615000.04615000.06253000.06658000.0
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseYearThree100.0100.0100.0100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo


Finite
Period End2021-06-302021-03-312020-12-312020-09-30
Value6247000.06247000.06949000.07437000.0
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo100.0100.0100.0100.0

us-gaap:FiniteLivedIntangibleAssetsGross

us-gaap:FiniteLivedIntangibleAssetsGross


Finite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302013-12-31
Value44484848485757575744444412191919191515151515156.566.566.566.566.566.6960.0
Percentage of FiniteLivedIntangibleAssetsGross100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

us-gaap:FiniteLivedIntangibleAssetsGross us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:CustomerRelationships


Finite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
Value1414141414151515151111110.912.212.212.212.211.81.81.81.81.81.81.31.31.31.31.31.327
Percentage of FiniteLivedIntangibleAssetsGross32.830.630.630.630.626.526.526.526.525.425.426.57.011.411.411.411.411.411.411.411.411.411.419.819.819.819.819.819.8

us-gaap:DevelopedTechnologyRights


Finite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
Value30303030303939393931313112171717171414141414145.25.25.25.25.25.308
Percentage of FiniteLivedIntangibleAssetsGross67.262.862.862.862.867.967.967.967.969.669.670.193.088.688.688.688.688.688.688.688.688.688.679.379.379.379.379.379.3

us-gaap:OrderOrProductionBacklog


Finite
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value3.23.23.23.23.23.23.23.22.22.21.5
Percentage of FiniteLivedIntangibleAssetsGross6.76.76.76.75.65.65.65.64.94.93.4

us-gaap:ForeignCurrencyCashFlowHedgeGainLossToBeReclassifiedDuringNext12Months us-gaap:DerivativeInstrumentRisk

us-gaap:ForeignCurrencyCashFlowHedgeGainLossToBeReclassifiedDuringNext12Months

us-gaap:ForeignExchangeForward


Foreign
Period End2021-06-302021-03-312020-12-31
Value-4000000.0-4000000.03000000.0
Percentage of ForeignCurrencyCashFlowHedgeGainLossToBeReclassifiedDuringNext12Months100.0100.0100.0

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths


Lessee
Period End2020-12-312020-09-30
Value2728
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths100.0100.0

us-gaap:LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear

us-gaap:LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear


Lessee
Period End2020-09-30
Value4897000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear100.0

us-gaap:LettersOfCreditOutstandingAmount

us-gaap:LettersOfCreditOutstandingAmount


Letters
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value5000000.04000000.01000000.02000000.02700000.03700000.03700000.03800000.0
Percentage of LettersOfCreditOutstandingAmount100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LongTermDebtFairValue us-gaap:DebtInstrument, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:LongtermDebtType

us-gaap:LongTermDebtFairValue

zen:ConvertibleSeniorNotesDue2023, us-gaap:FairValueInputsLevel2, us-gaap:ConvertibleDebt


Long
Period End2021-06-302021-03-312020-12-312020-09-302020-06-30
Value1690160016851366222
Percentage of LongTermDebtFairValue100.0100.0100.0100.0100.0

zen:ConvertibleSeniorNotesDue2025, us-gaap:FairValueInputsLevel2, us-gaap:ConvertibleDebt


Long
Period End2021-06-302021-03-312020-12-312020-09-302020-06-30
Value3433163492541228
Percentage of LongTermDebtFairValue20.319.820.718.6553.2

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths


Long
Period End2020-12-31
Value7560000.0
Percentage of LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths100.0

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive


Long
Period End2020-12-31
Value1153
Percentage of LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive100.0

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour


Long
Period End2020-12-31
Value7188000.0
Percentage of LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour100.0

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree


Long
Period End2020-12-31
Value156
Percentage of LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree100.0

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo

us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo


Long
Period End2020-12-31
Value7560000.0
Percentage of LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo100.0

us-gaap:MarketableSecurities

us-gaap:MarketableSecurities


Marketable
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-06-302015-03-312014-12-312014-09-302014-06-302013-12-31
Value105510619949666006386486286277036936533802502352242052062062041575451535251471212
Percentage of MarketableSecurities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:MarketableSecurities us-gaap:FairValueByMeasurementFrequency

us-gaap:FairValueMeasurementsRecurring


Marketable
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312014-12-31
Value10551061994966600638648628627703693653380250235224205206206204157545151
Percentage of MarketableSecurities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:MarketableSecuritiesNoncurrent

us-gaap:MarketableSecuritiesNoncurrent


Marketable
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-06-302015-03-312014-12-312014-09-302014-06-302013-12-31
Value540485428407303369361384371401393360188121979068687571511822227.5019.205182.7642.225
Percentage of MarketableSecuritiesNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingLeaseWeightedAverageDiscountRatePercent

us-gaap:OperatingLeaseWeightedAverageDiscountRatePercent


Operating
Period End2021-06-302021-03-312020-12-312020-09-302019-12-31
Value4.64.74.74.85.3
Percentage of OperatingLeaseWeightedAverageDiscountRatePercent100.0100.0100.0100.0100.0

us-gaap:OperatingLossCarryforwards us-gaap:BusinessAcquisition

us-gaap:OperatingLossCarryforwards

zen:WeAreCloudInc


Operating
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-31
Value3.03.03.03.03.03.3
Percentage of OperatingLossCarryforwards100.0100.0100.0100.0100.0100.0

us-gaap:OperatingLossCarryforwards us-gaap:IncomeTaxAuthority

us-gaap:DomesticCountry


Operating
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-31
Value1230948695464342243133
Percentage of OperatingLossCarryforwards41000.031600.023196.715483.311430.07363.60.0

us-gaap:StateAndLocalJurisdiction


Operating
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-31
Value4914123022181456747
Percentage of OperatingLossCarryforwards16366.713733.310096.77280.04860.02036.40.0

us-gaap:OperatingLossCarryforwards us-gaap:StatementGeographical

country:FR


Operating
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value8.08.0149.77.7
Percentage of OperatingLossCarryforwards266.7266.7486.7323.3256.7

us-gaap:PurchaseObligation

us-gaap:PurchaseObligation


Purchase
Period End2020-12-31
Value189
Percentage of PurchaseObligation100.0

us-gaap:PurchaseObligationDueInNextTwelveMonths

us-gaap:PurchaseObligationDueInNextTwelveMonths


Purchase
Period End2020-12-31
Value83
Percentage of PurchaseObligationDueInNextTwelveMonths100.0

us-gaap:PurchaseObligationDueInSecondYear

us-gaap:PurchaseObligationDueInSecondYear


Purchase
Period End2020-12-31
Value62
Percentage of PurchaseObligationDueInSecondYear100.0

us-gaap:PurchaseObligationDueInThirdYear

us-gaap:PurchaseObligationDueInThirdYear


Purchase
Period End2020-12-31
Value43
Percentage of PurchaseObligationDueInThirdYear100.0

us-gaap:RestrictedCashAndCashEquivalents

us-gaap:RestrictedCashAndCashEquivalents


Restricted
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value2000000.03000000.02400000.01500000.02500000.01300000.00200000.0
Percentage of RestrictedCashAndCashEquivalents100.0100.0100.0100.0100.0100.00.0100.0

us-gaap:RestrictedCashCurrent

us-gaap:RestrictedCashCurrent


Restricted
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value433000.01717000.01872000.01957000.02935000.02797000.02583000.02197000.01443000.01891000.01643000.0826000.01021000.0682000.0872000.0920000.01100000.01075000.0967000.0
Percentage of RestrictedCashCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RestrictedCashNoncurrent

us-gaap:RestrictedCashNoncurrent


Restricted
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value5000.05000.0557000.0724000.0724000.0723000.0723000.0722000.0720000.0719000.0715000.0599000.0624000.0634000.0646000.0648000.0637000.0443000.0418000.0
Percentage of RestrictedCashNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RevenueRemainingPerformanceObligation

us-gaap:RevenueRemainingPerformanceObligation


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value11301002925800713673641558526441406359326235
Percentage of RevenueRemainingPerformanceObligation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber

us-gaap:RestrictedStockUnitsRSU


Share
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-31
Value4801000.05370000.05141000.05171000.05565000.05846000.05361000.05908000.06462000.07028000.06611000.07151000.07472000.07768000.05827000.06464000.06801000.06517000.06936000.07565000.08052000.06417000.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue

us-gaap:RestrictedStockUnitsRSU


Share
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-31
Value99.2592.075.9368.4464.362.5355.052.8647.844.1137.7734.6531.6829.3225.024.0523.2221.7420.8120.2219.819.54
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant


Share
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302013-12-31
Value14141515111111128.2328.6449.3139.9728.0018.0898.835106.0395.825.9227.4664.3235.9566.8168.117.567.8938.7751.854
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant us-gaap:AwardType, us-gaap:PlanName

us-gaap:EmployeeStockOption, zen:TwoThousandFourteenPlan


Share
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-30
Value191914151515111111128.28.69.310.08.08.18.8106.05.85.97.54.36.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant0.00.099.9100.0100.2100.299.999.999.6100.499.699.599.9100.3100.0100.199.699.599.499.799.6100.599.5100.7

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant us-gaap:SubsidiarySaleOfStock

us-gaap:EmployeeStock


Share
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-30
Value5.66.04.85.15.15.54.34.64.65.03.94.24.24.63.63.93.94.23.33.53.53.82.93.4
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant0.00.033.334.033.635.137.039.338.841.547.448.645.146.145.048.244.140.654.660.159.150.967.157.1

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber


Share
Period End2020-12-31
Value3305000.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice


Share
Period End2020-12-31
Value20.59
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue


Share
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312013-12-31
Value4014054733152931892552503633602223062121791039084956615713291156981331610.2044670.050185
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueOutstanding

us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueOutstanding


Sharebased
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-31
Value735532492374410430575597385197
Percentage of SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1

us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1


Sharebased
Period End2020-12-31
Value404
Percentage of SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1100.0

us-gaap:TaxCreditCarryforwardAmount us-gaap:IncomeTaxAuthority, us-gaap:TaxCreditCarryforward

us-gaap:TaxCreditCarryforwardAmount

us-gaap:DomesticCountry, us-gaap:Research


Tax
Period End2020-12-312019-12-31
Value2014
Percentage of TaxCreditCarryforwardAmount100.0100.0

us-gaap:StateAndLocalJurisdiction, us-gaap:Research


Tax
Period End2020-12-312019-12-31
Value2015
Percentage of TaxCreditCarryforwardAmount100.0107.1

us-gaap:UnamortizedDebtIssuanceExpense us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:UnamortizedDebtIssuanceExpense

zen:ConvertibleSeniorNotesDue2023, us-gaap:ConvertibleDebt


Unamortized
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312018-03-152017-12-31
Value1.1221.2691.4121.5511.6877.0077.4997.9788.4428.8939.339.7551010100.0
Percentage of UnamortizedDebtIssuanceExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

zen:ConvertibleSeniorNotesDue2025, us-gaap:ConvertibleDebt


Unamortized
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value14141516170.0
Percentage of UnamortizedDebtIssuanceExpense1261.61171.81102.51047.11007.70.0

us-gaap:UndistributedEarningsOfForeignSubsidiaries

us-gaap:UndistributedEarningsOfForeignSubsidiaries


Undistributed
Period End2020-12-31
Value1000000.0
Percentage of UndistributedEarningsOfForeignSubsidiaries100.0

zen:DebtInstrumentCappedCallTransactionSharesCoveredByCapCall us-gaap:DebtInstrument, us-gaap:LongtermDebtType

zen:DebtInstrumentCappedCallTransactionSharesCoveredByCapCall

zen:ConvertibleSeniorNotesDue2023, us-gaap:ConvertibleDebt


Debt
Period End2021-06-302021-03-312020-09-302020-06-302018-03-31
Value2.42.42.42.49.1
Percentage of DebtInstrumentCappedCallTransactionSharesCoveredByCapCall100.0100.0100.0100.0100.0

zen:DebtInstrumentConvertibleCarryingAmountOfEquityComponentNet us-gaap:DebtInstrument, us-gaap:LongtermDebtType

zen:DebtInstrumentConvertibleCarryingAmountOfEquityComponentNet

zen:ConvertibleSeniorNotesDue2023, us-gaap:ConvertibleDebt


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value31313131311221221221221221221221221210.0
Percentage of DebtInstrumentConvertibleCarryingAmountOfEquityComponentNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

zen:ConvertibleSeniorNotesDue2025, us-gaap:ConvertibleDebt


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value2162162162162160.0
Percentage of DebtInstrumentConvertibleCarryingAmountOfEquityComponentNet682.3682.3682.3682.3682.30.0

zen:DebtInstrumentConvertibleEquityComponentUnamortizedDiscountIssuanceCosts us-gaap:DebtInstrument, us-gaap:LongtermDebtType

zen:DebtInstrumentConvertibleEquityComponentUnamortizedDiscountIssuanceCosts

zen:ConvertibleSeniorNotesDue2023, us-gaap:ConvertibleDebt


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value765000.0765000.0765000.0765000.0765000.02948000.02948000.02948000.02948000.02948000.02948000.02948000.02948000.02997000.00
Percentage of DebtInstrumentConvertibleEquityComponentUnamortizedDiscountIssuanceCosts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

zen:ConvertibleSeniorNotesDue2025, us-gaap:ConvertibleDebt


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value4035000.04035000.04035000.04035000.04035000.00
Percentage of DebtInstrumentConvertibleEquityComponentUnamortizedDiscountIssuanceCosts527.5527.5527.5527.5527.50.0

zen:DeferredTaxAssetsDisallowedInterest

zen:DeferredTaxAssetsDisallowedInterest


Deferred
Period End2020-12-31
Value1115000.0
Percentage of DeferredTaxAssetsDisallowedInterest100.0

zen:DeferredTaxAssetsOperatingLeaseLiability

zen:DeferredTaxAssetsOperatingLeaseLiability


Deferred
Period End2020-12-312019-12-31
Value2019
Percentage of DeferredTaxAssetsOperatingLeaseLiability100.0100.0

zen:DeferredTaxLiabilitiesDeferredCommissions

zen:DeferredTaxLiabilitiesDeferredCommissions


Deferred
Period End2020-12-312019-12-312018-12-312017-12-31
Value2416137.443
Percentage of DeferredTaxLiabilitiesDeferredCommissions100.0100.0100.0100.0

zen:DeferredTaxLiabilitiesDeferredExpensesConvertibleDebt

zen:DeferredTaxLiabilitiesDeferredExpensesConvertibleDebt


Deferred
Period End2020-12-312019-12-312018-12-312017-12-31
Value499.658120.0
Percentage of DeferredTaxLiabilitiesDeferredExpensesConvertibleDebt100.0100.0100.00.0

zen:DeferredTaxLiabilitiesOperatingLeaseRightOfUseAssets

zen:DeferredTaxLiabilitiesOperatingLeaseRightOfUseAssets


Deferred
Period End2020-12-312019-12-31
Value1616
Percentage of DeferredTaxLiabilitiesOperatingLeaseRightOfUseAssets100.0100.0

zen:FiniteLivedIntangibleAssetExpectedAmortizationAfterYearFour

zen:FiniteLivedIntangibleAssetExpectedAmortizationAfterYearFour


Finite
Period End2021-06-302021-03-312020-09-30
Value647000.0647000.01620000.0
Percentage of FiniteLivedIntangibleAssetExpectedAmortizationAfterYearFour100.0100.0100.0

zen:InternalUseSoftwareIncludedInConstructionInProgress

zen:InternalUseSoftwareIncludedInConstructionInProgress


Internal
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302013-12-31
Value16121310.0128.08.03.03.03.02.78.77.08.78.76.77.16.75.44.13.01.31.51.71.90.63.55.13.40.3
Percentage of InternalUseSoftwareIncludedInConstructionInProgress100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

zen:LesseeLeasePaymentsDue

zen:LesseeLeasePaymentsDue


Lessee
Period End2020-12-31
Value128
Percentage of LesseeLeasePaymentsDue100.0

zen:LesseeLeasePaymentsDueAfterYearFive

zen:LesseeLeasePaymentsDueAfterYearFive


Lessee
Period End2020-12-31
Value32
Percentage of LesseeLeasePaymentsDueAfterYearFive100.0

zen:LesseeLeasePaymentsDueYearFive

zen:LesseeLeasePaymentsDueYearFive


Lessee
Period End2020-12-31
Value8275000.0
Percentage of LesseeLeasePaymentsDueYearFive100.0

zen:LesseeLeasePaymentsDueYearFour

zen:LesseeLeasePaymentsDueYearFour


Lessee
Period End2020-12-31
Value9563000.0
Percentage of LesseeLeasePaymentsDueYearFour100.0

zen:LesseeLeasePaymentsDueYearThree

zen:LesseeLeasePaymentsDueYearThree


Lessee
Period End2020-12-31
Value19
Percentage of LesseeLeasePaymentsDueYearThree100.0

zen:LesseeLeasePaymentsDueYearTwo

zen:LesseeLeasePaymentsDueYearTwo


Lessee
Period End2020-12-31
Value28
Percentage of LesseeLeasePaymentsDueYearTwo100.0

zen:LesseeLeasePaymentsYearOne

zen:LesseeLeasePaymentsYearOne


Lessee
Period End2020-12-31
Value30
Percentage of LesseeLeasePaymentsYearOne100.0

zen:LesseeOperatingLeaseLeaseNotYetCommencedUndiscountedAmount

zen:LesseeOperatingLeaseLeaseNotYetCommencedUndiscountedAmount


Lessee
Period End2020-09-30
Value9000000.0
Percentage of LesseeOperatingLeaseLeaseNotYetCommencedUndiscountedAmount100.0

zen:LesseeOperatingLeaseLiabilityToBePaidAfterYearFour

zen:LesseeOperatingLeaseLiabilityToBePaidAfterYearFour


Lessee
Period End2020-09-30
Value33
Percentage of LesseeOperatingLeaseLiabilityToBePaidAfterYearFour100.0

zen:SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsExpectedToVestOutstanding

zen:SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsExpectedToVestOutstanding


Sharebased
Period End2020-12-31
Value4144000.0
Percentage of SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsExpectedToVestOutstanding100.0

zen:SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsExpectedToVestOutstandingAggregateIntrinsicValue

zen:SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsExpectedToVestOutstandingAggregateIntrinsicValue


Sharebased
Period End2020-12-31
Value593
Percentage of SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsExpectedToVestOutstandingAggregateIntrinsicValue100.0

Line plots across dimensions of each concept


us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecurities
(None,)
Antidilutive Securities Excluded From Computation Of Earnings Per Share Amountus-gaap: Antidilutive Securities Excluded From Computation Of Earnings Per Share By Antidilutive Securities
TTM Greenblatt ROC
_
(None,)
T T M  Greenblatt  R O C_
us-gaap:InterestExpense
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
(None, 'us-gaap:ConvertibleDebt')
Interest Expenseus-gaap: Debt Instrument, us-gaap: Longterm Debt Type
us-gaap:InterestExpenseDebt
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
(None, 'us-gaap:ConvertibleDebt')
Interest Expense Debtus-gaap: Debt Instrument, us-gaap: Longterm Debt Type
us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax
us-gaap:StatementGeographical
(None,)
Revenue From Contract With Customer Excluding Assessed Taxus-gaap: Statement Geographical
us-gaap:StockholdersEquity
us-gaap:StatementEquityComponents
(None,)
Stockholders Equityus-gaap: Statement Equity Components
us-gaap:NoncurrentAssets
us-gaap:StatementGeographical
(None,)
Noncurrent Assetsus-gaap: Statement Geographical
us-gaap:PropertyPlantAndEquipmentGross
us-gaap:PropertyPlantAndEquipmentByType
(None,)
Property Plant And Equipment Grossus-gaap: Property Plant And Equipment By Type
us-gaap:FiniteLivedIntangibleAssetsNet
us-gaap:FiniteLivedIntangibleAssetsByMajorClass
(None,)
Finite Lived Intangible Assets Netus-gaap: Finite Lived Intangible Assets By Major Class
us-gaap:LongTermDebt
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
(None, 'us-gaap:ConvertibleDebt')
Long Term Debtus-gaap: Debt Instrument, us-gaap: Longterm Debt Type
us-gaap:StockholdersEquity
us-gaap:StatementEquityComponents
(None,)
Stockholders Equityus-gaap: Statement Equity Components
us-gaap:AmortizationOfFinancingCosts
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
(None, 'us-gaap:ConvertibleDebt')
Amortization Of Financing Costsus-gaap: Debt Instrument, us-gaap: Longterm Debt Type
us-gaap:ShareBasedCompensation
us-gaap:IncomeStatementLocation
(None,)
Share Based Compensationus-gaap: Income Statement Location