PRFT


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

Table of contents



us-gaap:CommonStockValue

us-gaap:CommonStockSharesOutstanding
us-gaap:StatementEquityComponents

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecurities

us-gaap:EarningsPerShareBasic

us-gaap:EarningsPerShareDiluted

us-gaap:AllocatedShareBasedCompensationExpense

us-gaap:ComprehensiveIncomeNetOfTax

us-gaap:CostOfGoodsAndServicesSold
us-gaap:ProductOrService

us-gaap:CostOfRevenue

us-gaap:GainsLossesOnExtinguishmentOfDebt
us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments

us-gaap:IncomeTaxExpenseBenefit

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

us-gaap:InterestPaidNet

us-gaap:NetIncomeLoss
us-gaap:StatementEquityComponents

us-gaap:OperatingIncomeLoss

us-gaap:OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax
us-gaap:StatementEquityComponents

us-gaap:OtherNonoperatingIncomeExpense

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax
us-gaap:ProductOrService
us-gaap:ProductOrService, us-gaap:ContractWithCustomerBasisOfPricing
us-gaap:ProductOrService, us-gaap:ContractWithCustomerBasisOfPricing, us-gaap:TimingOfTransferOfGoodOrService
us-gaap:ProductOrService, us-gaap:TimingOfTransferOfGoodOrService
us-gaap:StatementGeographical
us-gaap:TimingOfTransferOfGoodOrService

us-gaap:Revenues

us-gaap:SellingGeneralAndAdministrativeExpense

us-gaap:Assets

us-gaap:Liabilities

us-gaap:LiabilitiesAndStockholdersEquity

us-gaap:StockholdersEquity
us-gaap:StatementEquityComponents

us-gaap:AssetsCurrent

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

us-gaap:AccountsReceivableNetCurrent

us-gaap:ReceivablesNetCurrent

us-gaap:OtherAssetsCurrent
us-gaap:PropertyPlantAndEquipmentByType
us-gaap:PropertyPlantAndEquipmentGross

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment

us-gaap:AmortizationOfIntangibleAssets

us-gaap:PropertyPlantAndEquipmentNet

us-gaap:Goodwill

us-gaap:IntangibleAssetsNetExcludingGoodwill
us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:OperatingLeaseRightOfUseAsset

us-gaap:OtherAssetsNoncurrent

us-gaap:AccountsPayableCurrent

us-gaap:LiabilitiesCurrent
us-gaap:PropertyPlantAndEquipmentByType

us-gaap:OperatingLeaseLiabilityCurrent

us-gaap:OtherLiabilitiesCurrent
us-gaap:PropertyPlantAndEquipmentByType
us-gaap:LiabilitiesNoncurrent

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

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:StatementEquityComponents

us-gaap:CommonStockValue

us-gaap:AdditionalPaidInCapitalCommonStock

us-gaap:RetainedEarningsAccumulatedDeficit

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax

us-gaap:TreasuryStockValue
us-gaap:StatementEquityComponents
us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities

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

us-gaap:DeferredIncomeTaxExpenseBenefit

us-gaap:IncreaseDecreaseInAccountsPayable

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetIncomeLoss
us-gaap:StatementEquityComponents

us-gaap:ShareBasedCompensation

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment

us-gaap:NetCashProvidedByUsedInFinancingActivities
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:PaymentsForRepurchaseOfCommonStock

us-gaap:EffectiveIncomeTaxRateContinuingOperations
us-gaap:AwardType, us-gaap:PlanName
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod

us-gaap:DeferredTaxLiabilities

us-gaap:UnrecognizedTaxBenefits
us-gaap:DebtInstrument, us-gaap:StatementEquityComponents
prft:AdjustmentToAdditionalPaidInCapitalPurchaseOfWarrants
us-gaap:DebtInstrument, us-gaap:StatementEquityComponents
prft:AdjustmentsToAdditionalPaidInCapitalProceedsFromDerivativesRelatedToConvertibleDebt
us-gaap:DebtInstrument, us-gaap:StatementEquityComponents
prft:AdjustmentstoAdditionalPaidinCapitalEquityComponentofConvertibleDebtNetofTax
us-gaap:StatementEquityComponents
prft:AdjustmenttoAdditionalPaidinCapitalDebtIssuanceCostsAllocatedtoEquityNetofTax
us-gaap:StatementEquityComponents
prft:AdjustmenttoAdditionalPaidinCapitalPurchaseofHedgesNetTax

prft:BusinessAcquisitionProformaWeightedAverageSharesOutstandingBasic

prft:BusinessAcquisitionProformaWeightedAverageSharesOutstandingDiluted
us-gaap:BusinessAcquisition
prft:BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentGoodwill
us-gaap:BusinessAcquisition
prft:BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentLiabilities
us-gaap:BusinessAcquisition
prft:BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentTangibleAssets
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
prft:ConvertibleNotesHedgesStockPriceTrigger
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
prft:CostOfEnteringIntoHedgesNetOfWarrants
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
prft:Costofpurchaseofhedgesonconvertiblenotes
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
prft:DebtInstrumentConvertibleOptiontoAcquireShares

prft:IncrementalCommonSharesAttributableToRestrictedStockSubjectToVesting

prft:InterestIncomeExpenseNonoperatingNetIncludingAmortizationofDebtDiscountandDeferredIssuanceCosts
us-gaap:CreditFacility, us-gaap:DebtInstrument
prft:LineOfCreditFacilityAllowableAmountForIssuanceOfLettersOfCredit

prft:PaymentsForRepurchaseOfConvertibleDebt
us-gaap:DebtInstrument, us-gaap:LongtermDebtType

prft:PaymentsForSoftwareDevelopmentCosts

prft:PaymentsForWarrantsRelatedToConvertibleNotes
us-gaap:DebtInstrument, us-gaap:LongtermDebtType, us-gaap:StatementEquityComponents

prft:ProceedsFromSaleOfDerivativesRelatedToConvertibleNotes
us-gaap:DebtInstrument, us-gaap:LongtermDebtType

prft:ProceedsFromTheSaleOfStockThroughTheEmployeeStockPurchasePlan

prft:RemittanceOfTaxesWithheldAsPartOfNetShareSettlementOfRestrictedStockVesting

prft:StockCompensationRelatedToRestrictedStockVestingAndRetirementSavingsPlanContributionsShares
us-gaap:StatementEquityComponents
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:AdjustmentsToAdditionalPaidInCapitalEquityComponentOfConvertibleDebt
us-gaap:DebtInstrument, us-gaap:LongtermDebtType, us-gaap:StatementEquityComponents
us-gaap:AdjustmentsToAdditionalPaidInCapitalWarrantIssued
us-gaap:StatementEquityComponents

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

us-gaap:AmortizationOfFinancingCostsAndDiscounts

us-gaap:BusinessAcquisitionProFormaEarningsPerShareBasic

us-gaap:BusinessAcquisitionProFormaEarningsPerShareDiluted

us-gaap:BusinessAcquisitionsProFormaNetIncomeLoss

us-gaap:BusinessAcquisitionsProFormaRevenue

us-gaap:BusinessCombinationAcquisitionRelatedCosts

us-gaap:BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuable

us-gaap:BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1
us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationProFormaInformationEarningsOrLossOfAcquireeSinceAcquisitionDateActual

us-gaap:BusinessCombinationProFormaInformationRevenueOfAcquireeSinceAcquisitionDateActual
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentConsiderationTransferred
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentIntangibles

us-gaap:CapitalExpendituresIncurredButNotYetPaid
us-gaap:AdjustmentsForNewAccountingPronouncements, us-gaap:InitialApplicationPeriodCumulativeEffectTransition
us-gaap:ContractWithCustomerLiabilityRevenueRecognized

us-gaap:Depreciation

us-gaap:EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

us-gaap:EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense

us-gaap:FinitelivedIntangibleAssetsAcquired1
us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:GoodwillForeignCurrencyTranslationGainLoss

us-gaap:GoodwillPurchaseAccountingAdjustments

us-gaap:IncreaseDecreaseInAccountsAndNotesReceivable

us-gaap:IncreaseDecreaseInOtherOperatingAssets

us-gaap:IncreaseDecreaseInOtherOperatingLiabilities

us-gaap:IncrementalCommonSharesAttributableToCallOptionsAndWarrants

us-gaap:IncrementalCommonSharesAttributableToConversionOfDebtSecurities

us-gaap:IncrementalCommonSharesAttributableToEquityUnitPurchaseAgreements
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:InterestExpenseDebtExcludingAmortization

us-gaap:OperatingLeaseExpense

us-gaap:PaymentForContingentConsiderationLiabilityFinancingActivities
us-gaap:BusinessAcquisition

us-gaap:PaymentsForRepurchaseOfEquity

us-gaap:PaymentsOfDebtIssuanceCosts
us-gaap:CreditFacility, us-gaap:DebtInstrument
us-gaap:PaymentsOfFinancingCosts

us-gaap:PaymentsToAcquireBusinessesNetOfCashAcquired

us-gaap:PensionAndOtherPostretirementBenefitExpense
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:ProceedsFromDebtNetOfIssuanceCosts

us-gaap:ProceedsFromLinesOfCredit
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:ProceedsFromNotesPayable

us-gaap:ProvisionForDoubtfulAccounts

us-gaap:RepaymentsOfLongTermLinesOfCredit
us-gaap:AwardType, us-gaap:PlanName
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod
us-gaap:AwardType, us-gaap:PlanName
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue
us-gaap:AwardType, us-gaap:PlanName
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
us-gaap:AwardType, us-gaap:PlanName
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod
us-gaap:AwardType, us-gaap:PlanName
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue
us-gaap:StatementEquityComponents
us-gaap:StockIssuedDuringPeriodSharesAcquisitions

us-gaap:StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans
us-gaap:StatementEquityComponents
us-gaap:StatementEquityComponents
us-gaap:StockIssuedDuringPeriodValueAcquisitions
us-gaap:StatementEquityComponents
us-gaap:StockIssuedDuringPeriodValueEmployeeStockPurchasePlan

us-gaap:TreasuryStockSharesAcquired
us-gaap:StatementEquityComponents
us-gaap:StatementEquityComponents
us-gaap:TreasuryStockValueAcquiredCostMethod

us-gaap:WeightedAverageNumberOfSharesIssuedBasic

dei:EntityCommonStockSharesOutstanding

prft:AccruedMedicalClaimsExpense

prft:AccruedSubcontractorFees

prft:AccruedVariableCompensation
us-gaap:FairValueByFairValueHierarchyLevel
prft:CompanyOwnedLifeInsurance

prft:DeferredEmployerFICAPayments

prft:DeferredEmployerFICAPaymentsCurrent

prft:DeferredEmployerFICAPaymentsNonCurrent

prft:DeferredEmployerFICAPaymentsNoncurrent
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
prft:DeferredFinanceCostsAttributabletoLiabilityComponent
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
prft:DeferredFinanceCostsEquityComponent
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
prft:DeferredTaxAssetEquityComponentDeferredFinanceCosts
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
prft:DeferredTaxAssetHedgesonConvertibleDebt

prft:DeferredTaxAssetOperatingLeaseLiability

prft:DeferredTaxLiabilitiesExcessTaxBenefitsFromShareBasedCompensation
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
prft:DeferredTaxLiabilityConvertibleDebtDiscount

prft:DeferredTaxLiabilityOperatingLeaseROU
us-gaap:CreditFacility, us-gaap:DebtInstrument
prft:LineOfCreditFacilityAdditionalCommitmentIncrease

prft:PayrollRelatedCosts

prft:ProfessionalFeesLiability
us-gaap:IncomeTaxAuthority, us-gaap:IncomeTaxAuthorityName, us-gaap:TaxPeriod
prft:ResearchTaxCredits

prft:SoftwareAccrualNoncurrent

prft:StockRepurchaseProgram

prft:StockRepurchaseProgramCumulativeAmountRepurchasedShares

us-gaap:AllowanceForDoubtfulAccountsReceivable
us-gaap:CumulativeEffectPeriodOfAdoption
us-gaap:BusinessAcquisition
us-gaap:BusinessAcquisitionPurchasePriceAllocationGoodwillExpectedTaxDeductibleAmount
us-gaap:SubsequentEventType
us-gaap:BusinessCombinationContingentConsiderationArrangementsRangeOfOutcomesValueHigh
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationContingentConsiderationLiability

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

us-gaap:ContractWithCustomerLiability
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:ConvertibleDebt
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:DebtInstrumentCarryingAmount
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:DebtInstrumentConvertibleConversionPrice1
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:DebtInstrumentFaceAmount
us-gaap:DebtInstrument, us-gaap:FairValueByFairValueHierarchyLevel
us-gaap:DebtInstrumentFairValue
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:DebtInstrumentInterestRateEffectivePercentage
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:DebtInstrumentUnamortizedDiscountPremiumNet

us-gaap:DeferredCompensationLiabilityClassifiedNoncurrent

us-gaap:DeferredCompensationLiabilityCurrentAndNoncurrent
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:DeferredFinanceCostsGross
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:DeferredFinanceCostsNet

us-gaap:DeferredIncomeTaxLiabilities

us-gaap:DeferredRevenueCurrent

us-gaap:DeferredTaxAssetsGoodwillAndIntangibleAssets

us-gaap:DeferredTaxAssetsGross

us-gaap:DeferredTaxAssetsOperatingLossCarryforwards

us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsOther

us-gaap:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities

us-gaap:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAllowanceForDoubtfulAccounts

us-gaap:DeferredTaxLiabilitiesGoodwillAndIntangibleAssets

us-gaap:DeferredTaxLiabilitiesOther

us-gaap:DeferredTaxLiabilitiesPrepaidExpenses

us-gaap:DeferredTaxLiabilitiesPropertyPlantAndEquipment

us-gaap:DeferredTaxLiabilityNotRecognizedAmountOfUnrecognizedDeferredTaxLiabilityUndistributedEarningsOfForeignSubsidiaries
us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation
us-gaap:DerivativeNotionalAmount
us-gaap:HedgingDesignation

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized

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:LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths

us-gaap:LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear

us-gaap:LifeInsuranceCorporateOrBankOwnedAmount
us-gaap:CreditFacility, us-gaap:DebtInstrument, us-gaap:VariableRate
us-gaap:LineOfCreditFacilityInterestRateAtPeriodEnd
us-gaap:CreditFacility, us-gaap:DebtInstrument
us-gaap:LineOfCreditFacilityRemainingBorrowingCapacity

us-gaap:OperatingLeaseWeightedAverageDiscountRatePercent
us-gaap:IncomeTaxAuthority, us-gaap:IncomeTaxAuthorityName
us-gaap:OperatingLossCarryforwards

us-gaap:OtherSundryLiabilitiesCurrent

us-gaap:OtherSundryLiabilitiesNoncurrent

us-gaap:PrepaidExpenseCurrent
us-gaap:AwardType, us-gaap:PlanName
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
us-gaap:AwardType, us-gaap:PlanName
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue
us-gaap:PlanName
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant

us-gaap:SharePrice

us-gaap:UnbilledReceivablesCurrent

us-gaap:UndistributedEarningsOfForeignSubsidiaries

us-gaap:UnrecognizedTaxBenefitsIncomeTaxPenaltiesAccrued

us-gaap:UnrecognizedTaxBenefitsInterestOnIncomeTaxesAccrued

Plots across concepts


IncomeStatement
Comprehensive Income Net Of Tax
Expenses
Other Nonoperating Income Expense
Balance Sheet
Operating Lease Right Of Use Asset
Assets
Property Plant And Equipment Net
Current Assets
Other Assets Current
NonCurrent Assets
Property Plant And Equipment Net
PropertyPlantAndEquipmentNet
Property Plant And Equipment Net
Liabilities
Operating Lease Liability
Current Liabilities
Deferred Revenue Current
Noncurrent Liabilities
Operating Lease Liability Noncurrent
Stockholders Equity
Accumulated Other Comprehensive Income Loss Net Of Tax
CashFlow
Net Cash Provided By Used In Financing Activities
NetCashProvidedByUsedInOperatingActivities
Amortization Of Financing Costs And Discounts
NetCashProvidedByUsedInInvestingActivities
Net Cash Provided By Used In Investing Activities
Shares
Weighted Average Number Of Shares Outstanding Basic
OperatingLeaseLiability
Operating Lease Liability Current
LesseeOperatingLeaseLiabilityPaymentsDue
Lessee Operating Lease Liability Undiscounted Excess Amount

Tables

  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
us-gaap:CommonStockValue ██████▇▇▇▇▇▇▇▇▆▆▆▆▆▅▅▅▅▅▅▅▄▄▄▄▄▃▃▃▃▂▂▂▁▁▁0.0510.0510.050.050.050.050.0490.0490.0490.0490.0480.0480.0480.0480.0470.0470.0470.0460.0460.0450.0450.0450.0450.0440.0440.0440.0430.0430.0430.0420.0410.040.040.0390.0390.0380.0380.0370.0360.0350.035NA0.033NANA
us-gaap:CommonStockSharesOutstanding ▅▅▅▅▆▅▅▅▅▅▅▅▇▇▇▇▇▇▇████▇▇▇▆▆▆▅▅▄▄▄▄▄▃▃▂▁▁32.07132.15132.07432.04232.27228632.06116731.68699131.44993131.52615431.59908131.77088831.92053433.22819933.37401133.24966533.44519433.60780833.75933533.86568834.61546634.57615634.6057534.39441233.91134733.76667333.76212232.85480232.82096132.70697532.24089831.34127630.87055230.92265330.80098630.82512330.84633230.32636929.50819528.74290628.25007828.037845NA27.275936NANA
us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding █▁33.86733.015NA32.64932.37732.876NA32.15932.0432.214NA33.64533.88933.79NA33.99133.74734.294NA35.07734.84334.842NA34.18734.13834.164NA33.32933.27132.628NA31.80831.76831.501NA31.67430.81530.044768NA29.51829.00228.640007NA27.96428.736
us-gaap:WeightedAverageNumberOfSharesOutstandingBasic █▁31.92231.864NA31.87331.88831.637NA31.24631.34331.376NA32.64832.77232.752NA32.67332.94233.383NA34.12833.99433.911NA33.49833.33333.046NA32.11831.56430.729NA30.14130.42830.292NA30.02129.24228.555679NA27.74427.85227.442127NA26.59427.183
us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount ▄▄4.4514.451NA16.2167.823.892NA7.6467.6467.751NA7.6460.00.12NA0.00.2280.122NA0.00.00.112NA0.0030.00.109NA0.00.290.0NA0.00.00.002NA0.0140.00.028NA0.5190.215NANANANA
us-gaap:EarningsPerShareBasic █▇▄▃▃▄▆▅▄▄▄▃▃▂▃▄▁▁▂▃▃▃▄▄▂▂▃▄▃▂▃▄▂▂▂▃▂▂▂▂▂▁▁▁▁0.520.430.270.190.210.280.380.310.270.220.240.190.180.150.20.220.070.080.110.160.170.160.220.220.120.120.20.230.20.10.180.240.150.140.140.170.120.10.10.120.10.070.049999999999999990.080.08
us-gaap:EarningsPerShareDiluted █▇▄▃▃▄▆▅▄▄▄▃▃▃▃▄▁▁▂▃▃▃▄▄▂▂▃▄▃▂▃▄▂▂▂▃▂▂▂▂▂▁▁▁▁0.490.410.260.190.20.270.360.30.270.220.230.190.170.150.190.210.070.080.110.160.170.160.220.220.120.120.190.220.190.090.170.230.140.130.140.160.120.10.090.120.10.060.050000000000000020.080.07
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
 TTM Greenblatt ROC _ _█▆▅▅▄▄▅▅▄▃▄▃▃▂▂▃▃▂▂▃▃▃▃▄▂▂▃▄▄▂▃▃▂▂▂▂▂▂▂▂▂▁26.09420.20615.41415.66511.73912.43615.61315.80813.38110.5311.4019.2618.4916.7914.93910.9578.2254.8596.4828.0149.2378.47211.13311.5955.4747.059.7312.39511.4165.4218.58610.3467.5385.2087.0387.5376.5544.9554.945.7174.8812.994NANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
us-gaap:AllocatedShareBasedCompensationExpense ██▇▆▇▆▆▅▆▆▅▅▅▄▄▄▄▄▄▃▄▄▃▃▃▄▃▃▃▃▂▂▂▂▂▁▁5.55.35.14.75.14.64.74.34.44.54.34.14.13.93.73.63.63.73.63.23.73.73.43.23.43.53.43.43.43.22.92.82.82.62.62.52.3NA2.42.42.3NANANANA
us-gaap:ComprehensiveIncomeNetOfTax ▇▄█▃▃▄▆▅▄▃▄▃▃▂▃▃▁▂▂▃▃▃▃▃▂▂▃▃▃▂▃▄▂▂▂▃▂▂▁▂▁▁15.39.30716.9435.1036.5318.011.7789.4948.5947.1977.7255.9425.2954.836.6367.1642.6763.0253.0725.4785.4435.5987.0936.7794.0163.8956.287.2076.442.9635.4747.2554.6323.9994.345.1913.5243.0252.7363.3692.7751.813NANANA
us-gaap:CostOfGoodsAndServicesSold █▇▇▆▆▆▆▆▆▅▅▅▅▅▆▅▅▄▅▅▅▅▆▅▄▄▅▅▅▄▃▃▃▃▃▃▃▂▂▂▂▁▁▁▁113.18106.06299.64796.70491.15593.21789.39289.23589.51586.07181.82679.18379.59579.22790.0381.13977.63574.94483.26682.74186.07683.61989.80380.50773.56374.53885.3577.43478.86165.71164.34162.89563.56959.42157.35659.24755.03952.05149.12747.85744.36539.95639.98438.19738.508
us-gaap:CostOfRevenue █▇▇▆▆▆▆▆▆▅▅▅▅▅▆▅▅▄▅▅▅▅▆▅▄▄▅▅▅▄▃▃▃▃▃▃▃▂▂▂▂▁▁▁▁113.18106.06299.64796.70491.15593.21789.39289.23589.51586.07181.82679.18379.59579.22790.0381.13977.63574.94483.26682.74186.07683.61989.80380.50773.56374.53885.3577.43478.86165.71164.34162.89563.56959.42157.35659.24755.03952.05149.12747.85744.36539.95639.98438.19738.508
us-gaap:GainsLossesOnExtinguishmentOfDebt NANA-0.2-4.337NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:GainsLossesOnExtinguishmentOfDebt us-gaap:DebtInstrument,us-gaap:LongtermDebtType prft:ConvertibleSeniorNotesDue2023,us-gaap:ConvertibleDebtNANA-4.5-4.3NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments █▆▄▃▃▄▅▅▄▃▃▃▃▂▂▄▃▂▂▃▃▃▄▄▂▂▃▄▄▂▃▄▃▂▂▃▂▂▂▂▂▁▁▁▁22.71816.78811.6048.5299.69310.50313.73913.90311.5278.7729.5918.4367.9266.4194.46210.5327.6194.536.2037.598.8677.84910.61811.0654.9356.2179.26311.94311.045.2748.5910.2577.4025.2497.0217.4496.5274.9884.9925.7294.8883.0363.2713.5993.303
us-gaap:IncomeTaxExpenseBenefit █▅▅▅▅▄▄▆▅▄▅▅▄▄▁▆▇▄▅▄▅▅▅▆▄▅▅▇▇▅▅▅▅▄▅▅▅▄▅▅▅▄▄▄▄6.1453.1953.1832.3523.0841.5291.9474.1242.9991.7462.1142.1312.0771.491-1.9733.5055.211.8212.512.0453.0522.4433.0483.6910.9382.1512.8384.6374.6532.2293.0763.0232.841.1262.6452.3072.9242.0022.2712.2632.1211.2431.9641.3461.252
us-gaap:IncomeTaxesPaidNet █▂▂▃▂▁▂▃▃▁▃▁▂▁▅▃▂▁▃▂▁▁▅▁▄▁▄▃▄▁▃▃▂▁▄▂▄▁▃▂▃▂▂▂8.7961.2181.4742.1941.1910.3971.8812.4832.6050.4362.6880.8190.9420.6785.3492.5230.9650.2372.4511.4660.5280.5935.1090.6453.6760.5143.7282.533.8360.4582.8222.7881.6780.5743.6161.9273.3510.7932.1191.6542.5991.4381.341.519NA
 us-gaap:InterestExpenseDebt us-gaap:DebtInstrument,us-gaap:LongtermDebtType prft:ConvertibleSeniorNotesDue2023,us-gaap:SeniorNotes▁▁▁▅███████▂0.0750.0740.1151.0912.0512.0372.0222.011.9961.9831.9710.435NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:InterestExpenseDebt us-gaap:DebtInstrument,us-gaap:LongtermDebtType prft:ConvertibleSeniorNotesDue2025,us-gaap:SeniorNotes███▁3.2073.1853.1441.642NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:InterestPaidNet ▁▇▁▇▁█▁█▁█▁▃▃▂▃▂▃▂▂▂▃▂▃▄▃▂0.011.4450.091.5080.0541.7590.0681.7620.0471.7970.1220.4710.5130.2930.6290.2080.4790.2350.2760.3510.4870.3730.5180.7620.5230.202NA0.4070.3020.124NA0.1150.0450.003NA0.0NANANANANANANANANA
us-gaap:NetIncomeLoss █▇▄▃▃▅▆▅▄▄▄▃▃▃▃▄▂▂▂▃▃▃▄▄▂▂▃▄▃▂▃▄▂▂▂▃▂▂▂▂▂▁▁▁▁16.57313.5938.4216.1776.6098.97411.7929.7798.5287.0267.4776.3055.8494.9286.4367.0272.4092.7093.6935.5455.8155.4067.577.3743.9974.0666.4247.3066.3873.0455.5137.2344.5624.1234.3765.1423.6032.9862.7213.4662.7671.7931.3072.2532.051
us-gaap:OperatingIncomeLoss █▆▅▅▄▄▅▅▄▃▄▃▃▂▂▃▃▂▂▃▃▃▃▄▂▂▃▄▄▂▃▃▂▂▂▂▂▂▂▂▂▁▁▁▁26.09420.20615.41415.66511.73912.43615.61315.80813.38110.5311.4019.2618.4916.7914.93910.9578.2254.8596.4828.0149.2378.47211.13311.5955.4747.059.7312.39511.4165.4218.58610.3467.5385.2087.0387.5376.5544.9554.945.7174.8812.9943.1743.5313.27
us-gaap:OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax ▃▁█▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃-1.273-4.2868.671-1.074-0.078-0.9740.057-0.2850.0660.1710.038-0.363-0.554-0.0980.1130.1370.2670.316-0.587-0.067-0.3720.192-0.477-0.5950.019-0.171-0.145-0.0990.053-0.082-0.0390.0210.07-0.124-0.0360.049-0.0790.0390.015-0.0970.0140.033NANANA
 us-gaap:OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax us-gaap:StatementEquityComponents us-gaap:AccumulatedOtherComprehensiveIncome▃▁█▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃-1.273-4.2868.671-1.074-0.078-0.9740.057-0.2850.0660.1710.038-0.363-0.554-0.0980.1130.1370.2670.316-0.587-0.067-0.3720.192-0.477-0.5950.019-0.171-0.145-0.0990.053-0.082-0.0390.0210.07-0.124-0.0360.049-0.0790.039NANANANANANANA
us-gaap:OtherNonoperatingIncomeExpense ▅▄▁▆▆▆▆▅▆▆▆▆▅▆▄▆▆▆▆▄▇▄▅▅▆▁▄▆▆▆█▆▄▆▆▆▆▆▆▆▅▆▆▆▆-0.009-0.122-0.2770.0090.015-0.007-0.007-0.010.0090.0350.0310.006-0.0520.002-0.0830.0150.0510.0180.034-0.0890.097-0.103-0.032-0.0290.009-0.28-0.0840.010.0490.020.1420.007-0.0830.046-0.0050.005-0.0020.0460.0510.013-0.0240.0060.0410.031-0.008
us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax █▇▇▇▆▆▆▆▆▅▅▅▅▅▅▅▄▄▅▄▅▅▅▅▄▄▅▄▄▃▃▃▃▃▃▃▂▂▂▂▂▁▁▁▁184.136169.341162.554157.678146.339145.562145.159144.684141.869133.815131.702123.933121.798120.942133.478123.738117.026111.019119.59119.153124.396123.843133.65120.909108.464110.598125.842116.971116.70997.1797.46596.75894.16784.93583.12887.47481.79674.69870.43370.17465.58756.24555.92954.64855.46
us-gaap:Revenues █▇▇▇▆▆▆▆▆▅▅▅▅▅▅▅▄▄▅▄▅▅▅▅▄▄▅▄▄▃▃▃▃▃▃▃▂▂▂▂▂▁▁▁▁184.136169.341162.554157.678146.339145.562145.159144.684141.869133.815131.702123.933121.798120.942133.478123.738117.026111.019119.59119.153124.396123.843133.65120.909108.464110.598125.842116.971116.70997.1797.46596.75894.16784.93583.12887.47481.79674.69870.43370.17465.58756.24555.92954.64855.46
us-gaap:SellingGeneralAndAdministrativeExpense █▇▇▇▇▇▇▇▇▇▇▆▅▆▆▅▅▅▅▅▅▅▅▄▅▄▅▄▄▄▃▄▃▃▂▃▂▂▂▂▂▁▁▁▁37.42433.97933.01234.56633.87633.22133.96934.53433.16132.52332.53929.32227.88428.7429.30827.07226.12825.68424.48424.47525.5926.71427.39223.71524.81324.04324.84822.23922.43320.68320.34720.53218.85117.87115.78817.71416.55914.79213.38913.79713.22211.26410.94511.70512.445
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
us-gaap:Assets ████▇▆▆▆▆▅▅▅▅▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▃▂▂▂▂▂▂▂▁▁▁▁786.195767.51785.761754.294715.454637.658640.492606.704604.79567.936570.544549.269504.54488.721499.06490.589491.325450.534456.576450.497456.41466.873474.364450.822433.913435.534426.042429.949420.914376.524325.749304.118306.001269.251267.194273.966260.592237.312223.932221.429215.153NA207.678NANA
us-gaap:Liabilities ████▆▅▅▅▅▅▅▄▃▃▃▃▃▂▂▂▂▃▃▃▃▃▃▃▃▂▂▂▂▁▁▁▁▁▁▁▁374.202368.976391.683367.869305.401244.134259.477237.456245.643218.123216.86194.265130.788119.032132.709124.073131.84992.27597.11178.5192.928111.24125.554114.484108.43115.252121.314129.524131.51299.40866.25953.52762.63129.63932.78141.07538.86327.30524.97327.64227.359NA30.514NANA
us-gaap:LiabilitiesAndStockholdersEquity ████▇▆▆▆▆▅▅▅▅▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▃▂▂▂▂▂▂▂▁▁▁▁786.195767.51785.761754.294715.454637.658640.492606.704604.79567.936570.544549.269504.54488.721499.06490.589491.325450.534456.576450.497456.41466.873474.364450.822433.913435.534426.042429.949420.914376.524325.749304.118306.001269.251267.194273.966260.592237.312223.932221.429215.153NA207.678NANA
us-gaap:StockholdersEquity ██▇▇█▇▇▇▆▆▆▆▇▇▇▇▆▆▆▇▆▆▆▆▅▅▅▅▄▄▃▃▃▃▂▂▂▂▁▁▁411.993398.534394.078386.425410.053393.524381.015369.248359.147349.813353.684355.004373.752369.689366.351366.516359.476358.259359.465371.987363.482355.633348.81336.338325.483320.282304.728300.425289.402277.116259.49250.591243.37239.612234.413232.891221.729210.007198.959193.787187.794NA177.164NANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
us-gaap:AssetsCurrent █▇▇▆▄▅▇▅▅▄▅▅▃▃▃▃▃▃▃▃▃▄▄▃▃▃▃▃▃▂▂▂▂▁▁▂▁▁▁▁▁248.553222.05226.51197.892159.356169.122211.897174.724169.966154.636177.804161.226125.651123.131129.208116.864113.395109.182122.499122.211124.667134.967139.752127.592114.12114.795132.018132.497120.863100.15995.23395.71596.41882.0580.84186.23382.84272.76574.98871.0777.081NA76.358NANA
us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents █▇█▅▂▃▇▄▃▃▄▄▁▁▁86.68672.05883.20450.03219.54429.30170.72836.4234.28227.73444.98444.94710.3595.4846.307NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:AccountsReceivableNetCurrent ▄▄▄▄▃▃▄▃▃▂█▇▆▆▇▆▆▄▆▆▇▇█▇▅▅▇▇▆▄▃▄▄▂▂▃▃▂▁▁▁87.9281.86685.99885.35478.02377.31387.02177.87274.23164.192122.446109.764107.286108.358112.194108.09100.62487.65103.702106.455109.412116.428120.612111.89496.73499.427113.928117.304102.22786.24278.88783.43585.92271.29669.66278.09174.84766.09260.89262.62658.308NA48.496NANA
us-gaap:ReceivablesNetCurrent █▆▅▅▄▃▄▃▃▁▂149.718138.836133.085137.043127.907126.728129.118126.304122.797115.089122.446NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:OtherAssetsCurrent ▅▄▄▄▅▅▆▅▇▅▅▁▃▃▅▁▂▅▄▂▁▅▆▂▆▄▄▆█▅▆▄▃▃▃▂▂▂▂▄▄5.7954.6884.6464.636.2266.67.4045.9737.8966.4975.7112.2123.4834.4446.2371.7763.0515.9245.3312.4572.2286.0677.0323.2617.0285.1054.6797.1319.4156.3736.7594.6953.7474.4583.7173.0972.5432.5233.1184.6624.891NA2.584NANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
 us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType us-gaap:ComputerEquipment█▇▇▆▆▆▅▇▇▆▆▆▅▅▅▅▅▅▅▄▅▄▄▄▄▄▃▃▂▂▂▂▂▁▁17.34416.09215.6415.0714.3213.66712.99515.70615.42914.77914.1613.83213.43613.26813.1113.1613.03612.39212.19112.05812.43612.07711.46711.04510.7110.67710.2219.7098.9448.4738.1048.6268.2057.4756.906NANANANANANANANANANA
 us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType us-gaap:ComputerSoftwareIntangibleAsset█▂▂▂▁▁▁6.0125.3415.3425.3345.3195.2755.272NANANA5.042NANANA5.159NANANA9.186NANANA7.883NANANA6.828NANANA6.042NANANANANANANANANANANANANANA
 us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType us-gaap:FurnitureAndFixtures▇▇▇▆▆▆▅█▇▇▇▇▆▆▅▅▄▄▄▄▄▄▃▃▃▃▂▂▂▁▁▂▂▁▁4.494.5064.5974.3774.2624.0983.8835.1334.9014.6814.6534.4724.2034.0923.7723.5483.5073.3253.3063.223.2133.2112.9572.9482.8972.8692.4422.2972.2171.9991.8912.1582.1552.1022.046NANANANANANANANANANA
 us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType us-gaap:LeaseholdImprovements██▇▇▇▇▆▇▄▃▃▃▃▃▂▂▂▁▁▂▂▂▂▂▂▂▁▁▁▁▁▁▁▁▁7.0417.0836.6076.5496.3445.9525.6746.4784.4233.5133.3963.1723.123.0382.8362.2952.2211.9671.9582.7122.6342.5572.5172.4842.4742.3322.0752.0222.0512.0331.9971.9861.9811.8291.775NANANANANANANANANANA
us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment ██▇▇▇▇▆▇▇██▇▇▇▇▇▇▇▇▇▇▇▇▇▆▆▆▆▆▅▅▅▅▁▅▅▅22.76321.30520.28419.29217.75716.69215.65420.19619.64321.15720.57419.95319.12318.57817.73216.73715.97319.01617.75317.47616.88118.14316.93316.23415.25114.67613.612.57811.65311.05110.32510.5379.648-9.0488.3357.7587.374NA6.989NANANANANANA
us-gaap:AmortizationOfIntangibleAssets ▇███▅▄▄▄▄▅▅▄▅▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▃▂▂▂▂▂▂▂▂▂▂▂▁▁▁▁6.3337.0527.37.2374.3983.9224.0073.9974.014.1374.3274.0094.1373.8833.9273.9363.5373.6253.4343.2663.3063.3653.253.3573.4113.8013.9424.0453.732.7362.2241.9552.0181.7772.1632.2581.8411.5651.6781.9841.5361.1430.9650.9751.072
us-gaap:PropertyPlantAndEquipmentNet █▇██████▆▄▄▃▄▄▄▄▅▅▅▆▆▄▄▅▅▅▄▄▅▄▄▅▅▃▂▂▁▁▁▁▁12.12411.71711.90212.03812.48812.312.1712.39110.3946.9776.6776.5656.6786.9817.1457.4258.3018.1378.8889.53710.3517.7817.8918.048.3698.3367.9667.9457.9747.5787.7098.2518.655.9814.3984.5264.0713.7973.493.6543.448NA2.355NANA
us-gaap:Goodwill █████▆▆▆▆▆▆▆▅▅▅▅▅▅▅▄▄▄▄▄▄▄▄▄▄▃▃▂▂▂▂▂▂▁▁▁▁420.508421.927427.928419.029417.403361.537335.564335.588335.983327.931327.992321.995315.405305.142305.238304.583304.456281.241275.205269.57269.536269.606269.383259.14255.189252.819236.13236.14235.203221.596193.51175.162175.173161.695160.936160.199150.823142.173132.038131.961120.903NA115.227NANA
us-gaap:IntangibleAssetsNetExcludingGoodwill ▅▆▇▇█▅▄▄▅▅▅▅▅▅▅▆▆▅▅▅▅▅▆▅▅▆▅▅▆▅▃▂▂▂▂▂▂▂▁▁▁48.93755.36863.57167.34775.79849.66637.95341.65445.10444.18548.09249.82148.99547.27151.06655.28259.04146.76445.11545.2447.96550.70653.40852.22152.21855.33346.10549.52553.04543.3325.48721.32622.38715.8217.3519.40817.53115.04710.12811.81810.659NA8.829NANA
us-gaap:OperatingLeaseRightOfUseAsset ▇▇██▇▆▆▆▆▅▁35.05637.19538.53940.18635.57130.56227.74827.49128.10120.80.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:OtherAssetsNoncurrent █▇▇▇▆▅▆▆▆▅▄▄▃▂▂▂▂▂▂▁▁▁▁▁▁▂▁▁▁▁▁▁▁▁▁▁▂▁▁▁▁21.01719.25317.31117.80214.83814.47115.1614.85615.24213.449.9799.6627.8116.1966.4036.4356.1325.214.8693.9393.8913.8133.933.8294.0174.2513.8233.8423.8293.8613.813.6643.3733.7053.6693.65.3253.533.2882.9263.062NA2.655NANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
us-gaap:AccountsPayableCurrent █▅█▅▅▅▇▄▅▄▇▃▄▃▇▄▄▃▆▄▅▄▆▄▃▃▇▄▄▂▂▂▃▂▂▂▂▁▂▁▁26.16716.1525.61316.51916.08515.49823.08114.47315.91412.66124.43710.80114.49511.14623.19611.99212.0449.98418.41613.48514.81212.73618.79313.76811.1610.90122.03513.53213.0886.6747.6676.20511.2916.5217.9597.5384.944.445.0294.0333.289NA6.072NANA
us-gaap:LiabilitiesCurrent ▇▆█▆▆▄▅▄▄▃▅▃▃▃▄▂▃▂▃▂▂▂▃▂▂▂▃▂▃▂▂▂▂▁▂▂▁▁▁▁▁113.85103.523128.88100.69897.18365.36284.58464.974.02254.82774.82354.97356.15745.19661.27340.04444.04232.9446.05335.9942.60141.73356.57641.65238.01137.37755.06341.6447.54332.39237.96532.43337.67321.9828.56428.21625.10319.69923.51225.95525.411NA28.726NANA
us-gaap:OperatingLeaseLiabilityCurrent ▅▅▆▆█▄▃▂▁10.14810.13410.32110.25711.2079.5388.9928.7378.379NA0.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:OtherLiabilitiesCurrent ▇▇█▆▆▄▅▄▄▃▄▃▃▂▃▂▂▂▂▂▂▂▃▂▂▂▂▂▃▂▂▂▂▁▁▁▁▁▁▂▂87.68387.373103.26784.17981.09849.86461.50350.42758.10842.16650.38644.17241.66234.0538.07728.05231.99822.95627.63722.50527.78928.99737.78327.88426.85126.47633.02828.10834.45525.71830.29826.22826.38215.45920.60520.67820.16315.25918.48321.92222.122NA22.654NANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
 us-gaap:LiabilitiesNoncurrent us-gaap:PropertyPlantAndEquipmentByType us-gaap:SoftwareAndSoftwareDevelopmentCostsNANA0.2NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LongTermDebt ██▇█▃▂▂▁▁▁▁▁188.667186.135183.624187.737139.044125.847124.664123.494122.338121.196120.067119.038NANA55.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:OtherLiabilitiesNoncurrent ▇███▇▅▅▅▅▅▄▄▃▃▃▃▄▄▃▃▃▃▃▂▂▂▃▃▃▃▂▂▁▁▁▁▁▁▁▁▁45.81451.38150.08148.62143.99931.0730.5829.38828.65527.30821.9720.25418.63117.83616.43619.02919.80720.83519.05814.5214.32713.50712.97811.83210.41910.37512.25113.08412.96917.0169.2945.0944.6581.6591.4171.3591.261.4061.4611.6871.948NA1.788NANA
us-gaap:OperatingLeaseLiabilityNoncurrent ▅▆▇█▄▂▁▁▂25.87127.93729.09830.81325.17521.85519.64919.67420.628NA0.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo ▁▁█▇8.0928.059.7919.575NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree ▁▁█▇6.2576.2117.7657.563NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour ▁▁█▇4.7064.6515.955.853NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive NANA4.389NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive ▁▁▁█5.9015.9075.639.841NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
us-gaap:StockholdersEquity ██▇▇█▇▇▇▆▆▆▆▇▇▇▇▆▆▆▇▆▆▆▆▅▅▅▅▄▄▃▃▃▃▂▂▂▂▁▁▁411.993398.534394.078386.425410.053393.524381.015369.248359.147349.813353.684355.004373.752369.689366.351366.516359.476358.259359.465371.987363.482355.633348.81336.338325.483320.282304.728300.425289.402277.116259.49250.591243.37239.612234.413232.891221.729210.007198.959193.787187.794NA177.164NANA
us-gaap:CommonStockValue ██████▇▇▇▇▇▇▇▇▆▆▆▆▆▅▅▅▅▅▅▅▄▄▄▄▄▃▃▃▃▂▂▂▁▁▁0.0510.0510.050.050.050.050.0490.0490.0490.0490.0480.0480.0480.0480.0470.0470.0470.0460.0460.0450.0450.0450.0450.0440.0440.0440.0430.0430.0430.0420.0410.040.040.0390.0390.0380.0380.0370.0360.0350.035NA0.033NANA
us-gaap:AdditionalPaidInCapitalCommonStock ███▇██▇▇▇▇▇▇▆▆▆▆▆▅▅▅▅▅▅▅▄▄▄▄▄▃▃▃▂▂▂▂▂▂▁▁▁470.218465.156459.866457.528475.147465.123455.465451.287447.146441.541437.25431.51414.61407.707403.906400.405396.801385.28379.094375.473372.343368.362364.786358.048353.759349.98334.645330.67326.525314.988297.997291.574287.701279.075276.201272.232266.159257.475248.855243.155236.819NA224.966NANA
us-gaap:RetainedEarningsAccumulatedDeficit ██▇▇▇▇▆▆▆▅▅▅▅▅▅▄▄▄▄▄▄▄▄▃▃▃▃▃▂▂▂▂▂▂▂▂▁▁▁▁▁249.807233.234219.641211.22205.043198.434189.775177.983168.204159.676152.65145.174138.869133.019128.091121.656114.629112.219109.51105.817100.27294.45789.05181.48174.10770.1166.04459.61952.31445.92642.88137.36830.13425.57221.44917.07311.9318.3285.3422.621-0.845NA-5.405NANA
us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax ▃▄█▁▂▂▃▃▃▃▃▃▃▃▃▃▃▃▃▃▃▄▃▄▄▄▄▅▅▅▅▅▅▅▅▅▅▅▅▅▅-1.813-0.543.746-4.776-3.702-3.624-2.65-2.636-2.351-2.417-2.588-2.837-2.474-1.92-1.822-2.023-2.16-2.427-2.743-2.122-2.055-1.683-1.875-1.398-0.803-0.822-0.651-0.506-0.407-0.46-0.378-0.339-0.36-0.43-0.306-0.27-0.319-0.24-0.279-0.294-0.197NA-0.225NANA
us-gaap:TreasuryStockValue ███▇▇▇▇▇▇▆▆▆▅▄▄▄▄▃▃▃▃▃▂▂▂▂▂▂▂▂▂▂▂▁▁▁▁▁▁▁▁306.27299.367289.225277.597266.485266.459261.624257.435253.901249.036233.676218.891177.301169.165163.871153.569149.841136.859126.442107.226107.123105.548103.197101.837101.62499.0395.35389.40189.07383.3881.05178.05274.14564.64462.9756.18256.0855.59354.99551.7348.018NA42.205NANA
 us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue us-gaap:StatementEquityComponents us-gaap:AdditionalPaidInCapital▇█▇▆▇▇▆▅▅▆▆▅▅▅▄▄▄▄▄▃▅▄▄▃▄▄▄▃▃▃▃▂▂▂▂▂▁▁▁▂4.9565.1854.694.4194.6794.7264.134.0964.1084.2474.1713.9453.8523.7623.5013.53.5063.5893.5783.0813.7913.5233.3033.1853.2743.3483.2853.1583.2223.0532.8762.7982.7522.6082.5942.5472.2422.2062.4172.427NANANANANA
 us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue us-gaap:StatementEquityComponents us-gaap:CommonStock▁█▁▁▁█▁▁▁█▁▁▁█0.00.0010.00.00.00.0010.00.00.00.0010.00.00.00.001NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
us-gaap:NetCashProvidedByUsedInOperatingActivities ▅▂█▄▆▁▆▃▄▂▅▃▄▂▄▂▃▃▄▃▄▂▄▂▃▃▅▁▂▁▄▃▃▂▄▃▃▂▃▂▂▁▂▂28.7191.16158.34122.11941.884-4.38440.27813.87524.157-0.34525.78813.23825.4144.1425.0975.24411.42613.45423.40210.51124.9524.43618.4695.21412.6728.36633.408-2.286.092-3.18721.09610.39615.877-0.51818.36211.3767.611.86312.4475.9982.746-6.8713.9485.068NA
us-gaap:NetCashProvidedByUsedInInvestingActivities ▇▇▇█▁▄▇▇▆▇▇▆▆█▇█▄▇▇▇▇▇▆▇▇▅▇▇▅▅▅▇▅▇█▆▆▆█▆██▇█-2.376-1.828-3.299-0.587-62.933-31.795-1.923-3.85-12.827-1.799-6.416-11.74-12.173-0.959-1.039-0.586-32.616-7.967-7.049-2.618-1.881-1.983-12.353-4.058-2.623-23.205-1.71-1.574-21.854-28.457-20.602-2.14-20.709-2.961-0.76-11.289-11.798-14.823-0.816-12.9823.771.243-2.880.812NA
us-gaap:NetCashProvidedByUsedInFinancingActivities ▃▃▁▅▅▄▄▃▄▂▂█▃▄▂▃▆▄▂▃▁▄▃▄▃▅▁▄▆█▄▃▅▄▂▄▅▅▄▄▄▄▄▃-11.638-10.037-22.7278.87211.174-4.795-4.141-7.77-4.824-15.316-19.28933.254-8.094-3.952-20.302-7.96615.841-4.848-15.173-8.054-22.362-2.298-5.8490.941-9.57710.217-26.1182.61917.67329.3861.071-7.5185.3211.796-15.271-0.8395.7685.874-3.873-3.562-3.4432.34-2.244-6.696NA
us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect ▆▄██▄▁█▅▅▃14.628-11.14633.17230.488-9.757-41.42734.3082.1386.548-17.25NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
 us-gaap:AmortizationOfFinancingCosts us-gaap:DebtInstrument,us-gaap:LongtermDebtType prft:ConvertibleSeniorNotesDue2023,us-gaap:SeniorNotes▁▁▁▅███████▂0.0080.0070.0110.110.2060.2060.2060.2060.2060.2060.2070.045NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:AmortizationOfFinancingCosts us-gaap:DebtInstrument,us-gaap:LongtermDebtType prft:ConvertibleSeniorNotesDue2025,us-gaap:SeniorNotes███▁0.2880.2870.2870.151NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:DeferredIncomeTaxExpenseBenefit ▄▅▅▄▄▆▅▅▅▇▆▅▅▆▁▄▅▆█▅▅▅▆▅▅▅▄▅▅▆▅▆▄▅▄▅▄▅▄▆▅▅▅▅-1.4180.455-0.152-1.688-1.3561.6080.043-0.0750.0791.9940.723-0.119-0.1760.95-5.058-1.1160.5321.5023.909-0.129-0.0410.6511.8480.34-0.241-0.45-1.2950.3120.5481.0970.6861.033-0.6970.582-0.8560.22-0.6760.699-0.721.127-0.410.5340.3650.11NA
us-gaap:IncreaseDecreaseInAccountsPayable ▇▂▇▄▄▂▇▄▅▁█▃▅▁▇▄▅▂▆▄▅▃▆▅▄▁▇▄▆▄▅▃▅▄▄▅▄▄▅▄▄▃▄▅10.017-7.8448.233-0.3760.587-7.5838.608-0.6822.494-11.77613.635-3.6933.349-12.0511.203-0.0512.06-8.4324.931-1.3272.076-6.0575.0252.6080.254-11.1298.5440.416.382-0.9921.514-4.3563.91-1.4290.4222.5280.109-0.8691.010.3170.273-3.1220.0261.284NA
us-gaap:NetCashProvidedByUsedInOperatingActivities ▅▂█▄▆▁▆▃▄▂▅▃▄▂▄▂▃▃▄▃▄▂▄▂▃▃▅▁▂▁▄▃▃▂▄▃▃▂▃▂▂▁▂▂28.7191.16158.34122.11941.884-4.38440.27813.87524.157-0.34525.78813.23825.4144.1425.0975.24411.42613.45423.40210.51124.9524.43618.4695.21412.6728.36633.408-2.286.092-3.18721.09610.39615.877-0.51818.36211.3767.611.86312.4475.9982.746-6.8713.9485.068NA
us-gaap:NetIncomeLoss █▇▄▃▃▅▆▅▄▄▄▃▃▃▃▄▂▂▂▃▃▃▄▄▂▂▃▄▃▂▃▄▂▂▂▃▂▂▂▂▂▁▁▁▁16.57313.5938.4216.1776.6098.97411.7929.7798.5287.0267.4776.3055.8494.9286.4367.0272.4092.7093.6935.5455.8155.4067.577.3743.9974.0666.4247.3066.3873.0455.5137.2344.5624.1234.3765.1423.6032.9862.7213.4662.7671.7931.3072.2532.051
us-gaap:ShareBasedCompensation ███▇▇▇▇▆▆▆▆▅▅▅▄▄▄▄▄▃▅▄▄▄▄▄▄▃▄▃▃▃▃▂▂▂▁▁▂▂▁▁▄▂5.2075.1134.9864.6884.8654.6074.9734.0964.1084.2484.1713.9453.8523.7633.5013.53.5063.5893.5793.0813.7913.5233.3033.1853.2743.3483.2863.1583.2223.0532.8762.7982.7522.6082.5952.5472.2422.2062.4182.4272.2762.0573.3012.483NA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
us-gaap:NetCashProvidedByUsedInInvestingActivities ▇▇▇█▁▄▇▇▆▇▇▆▆█▇█▄▇▇▇▇▇▆▇▇▅▇▇▅▅▅▇▅▇█▆▆▆█▆██▇█-2.376-1.828-3.299-0.587-62.933-31.795-1.923-3.85-12.827-1.799-6.416-11.74-12.173-0.959-1.039-0.586-32.616-7.967-7.049-2.618-1.881-1.983-12.353-4.058-2.623-23.205-1.71-1.574-21.854-28.457-20.602-2.14-20.709-2.961-0.76-11.289-11.798-14.823-0.816-12.9823.771.243-2.880.812NA
us-gaap:PaymentsToAcquirePropertyPlantAndEquipment ▆▄▄▄▃▄▄█▆▄▃▄▂▂▂▁▄▁▁▃▄▃▂▂▃▂▃▃▃▂▁▃▂▆▂▂▁▁▁▂▃▂▁▁2.1431.481.3861.4330.9341.5131.6163.0262.1281.3120.9021.6180.6910.8730.840.4091.6510.4610.5121.2191.3121.0440.8940.8071.1250.531.0420.9221.0130.6970.3671.2790.742.2630.5320.5470.4890.3550.3830.6651.0980.630.3450.322NA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
us-gaap:NetCashProvidedByUsedInFinancingActivities ▃▃▁▅▅▄▄▃▄▂▂█▃▄▂▃▆▄▂▃▁▄▃▄▃▅▁▄▆█▄▃▅▄▂▄▅▅▄▄▄▄▄▃-11.638-10.037-22.7278.87211.174-4.795-4.141-7.77-4.824-15.316-19.28933.254-8.094-3.952-20.302-7.96615.841-4.848-15.173-8.054-22.362-2.298-5.8490.941-9.57710.217-26.1182.61917.67329.3861.071-7.5185.3211.796-15.271-0.8395.7685.874-3.873-3.562-3.4432.34-2.244-6.696NA
 us-gaap:PaymentsForRepurchaseOfCommonStock us-gaap:DebtInstrument,us-gaap:LongtermDebtType prft:ConvertibleSeniorNotesDue2025,us-gaap:ConvertibleDebtNANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30

Common Stock Value

us-gaap:CommonStockValue

us-gaap:CommonStockValue


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value51000.051000.050000.050000.050000.050000.049000.049000.049000.049000.048000.048000.048000.048000.047000.047000.047000.046000.046000.045000.045000.045000.045000.044000.044000.044000.043000.043000.043000.042000.041000.040000.040000.039000.039000.038000.038000.037000.036000.035000.035000.033000.0
Percentage of CommonStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Common Stock Shares Outstanding

us-gaap:CommonStockSharesOutstanding

us-gaap:CommonStockSharesOutstanding


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value323232323232313131313131333333333333333434343433333332323232313030303030302928282827
Percentage of CommonStockSharesOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CommonStockSharesOutstanding us-gaap:StatementEquityComponents

us-gaap:CommonStock


Common
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-312009-12-312008-12-31
Value32323232313131313131333333333333333434343433333332320.0327070.0322413130303030303029282828272728
Percentage of CommonStockSharesOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.10.1100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.0

Weighted Average Number Of Diluted Shares Outstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding


Weighted
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-30
Value33333232323232323333333333343534343434343333323131313130302929282728
Percentage of WeightedAverageNumberOfDilutedSharesOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Weighted Average Number Of Shares Outstanding Basic

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic


Weighted
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-30
Value31313131313131313232323232333433333333333231303030303029282727272627
Percentage of WeightedAverageNumberOfSharesOutstandingBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount


Antidilutive
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-30
Value4.4514.451167.823.8927.6467.6467.7517.6460.00.120.00.2280.1220.00.00.1120.0030.00.1090.00.290.00.00.00.0020.0140.00.0280.5190.215
Percentage of AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.00.0100.0100.00.00.0100.0100.00.0100.00.0100.00.00.00.0100.0100.00.0100.0100.0100.0

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecurities

us-gaap:ConvertibleDebtSecurities


Antidilutive
Period End2020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-30
Value7.9423.8230.03.8233.8233.8233.8230.00.00.0
Percentage of AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount49.048.90.050.050.049.350.00.00.00.0

us-gaap:Warrant


Antidilutive
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-30
Value4.4514.4518.2743.8233.8233.8233.8233.8233.8230.00.00.0
Percentage of AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount100.0100.051.048.998.250.050.049.350.00.00.00.0

Earnings Per Share Basic

us-gaap:EarningsPerShareBasic

us-gaap:EarningsPerShareBasic


Earnings
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value0.520.430.270.190.210.280.380.310.270.220.240.190.180.150.20.220.070.080.110.160.170.160.220.220.120.120.20.230.20.10.180.240.150.140.140.170.120.10.10.120.10.070.050.080.08
Percentage of EarningsPerShareBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Earnings Per Share Diluted

us-gaap:EarningsPerShareDiluted

us-gaap:EarningsPerShareDiluted


Earnings
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value0.490.410.260.190.20.270.360.30.270.220.230.190.170.150.190.210.070.080.110.160.170.160.220.220.120.120.190.220.190.090.170.230.140.130.140.160.120.10.090.120.10.060.050.080.07
Percentage of EarningsPerShareDiluted100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Allocated Share Based Compensation Expense

us-gaap:AllocatedShareBasedCompensationExpense

us-gaap:AllocatedShareBasedCompensationExpense


Allocated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-312011-09-302011-06-30
Value5.55.35.14.75.14.64.74.34.44.54.34.14.13.93.73.63.63.73.63.23.73.73.43.23.43.53.43.43.43.22.92.82.82.62.62.52.32.42.42.3
Percentage of AllocatedShareBasedCompensationExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax3.03.13.13.03.53.23.23.03.13.43.33.33.43.22.82.93.13.33.02.73.03.02.52.63.13.22.72.92.93.33.02.93.03.13.12.92.83.43.43.5

Comprehensive Income Net Of Tax

us-gaap:ComprehensiveIncomeNetOfTax

us-gaap:ComprehensiveIncomeNetOfTax


Comprehensive
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value159.307165.1036.5318.0119.4948.5947.1977.7255.9425.2954.836.6367.1642.6763.0253.0725.4785.4435.5987.0936.7794.0163.8956.287.2076.442.9635.4747.2554.6323.9994.345.1913.5243.0252.7363.3692.7751.813
Percentage of ComprehensiveIncomeNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax8.35.510.43.24.55.58.16.66.15.45.94.84.34.05.05.82.32.72.64.64.44.55.35.63.73.55.06.25.53.05.67.54.94.75.25.94.34.03.94.84.23.2

Cost Of Goods And Services Sold

us-gaap:CostOfGoodsAndServicesSold

us-gaap:CostOfGoodsAndServicesSold


Cost
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value11310699969193898989868179797990817774838286838980737485777865646263595759555249474439393838
Percentage of CostOfGoodsAndServicesSold100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax61.562.661.361.362.364.061.661.763.164.362.163.965.465.567.465.666.367.569.669.469.267.567.266.667.867.467.866.267.667.666.065.067.570.069.067.767.369.769.768.267.671.00.069.969.4

us-gaap:CostOfGoodsAndServicesSold us-gaap:ProductOrService

us-gaap:Service


Cost
Period End2020-12-312020-09-302019-12-312019-09-30
Value99968989
Percentage of CostOfGoodsAndServicesSold100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax61.361.361.661.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:Service0.00.00.00.0

Cost Of Revenue

us-gaap:CostOfRevenue

us-gaap:CostOfRevenue


Cost
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value11310699969193898989868179797990817774838286838980737485777865646263595759555249474439393838
Percentage of CostOfRevenue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax61.562.661.361.362.364.061.661.763.164.362.163.965.465.567.465.666.367.569.669.469.267.567.266.667.867.467.866.267.667.666.065.067.570.069.067.767.369.769.768.267.671.00.069.969.4

Gains Losses On Extinguishment Of Debt

us-gaap:GainsLossesOnExtinguishmentOfDebt

us-gaap:GainsLossesOnExtinguishmentOfDebt


Gains
Period End2020-12-312020-09-30
Value-200000.0-4337000.0
Percentage of GainsLossesOnExtinguishmentOfDebt100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.1-2.8

us-gaap:GainsLossesOnExtinguishmentOfDebt us-gaap:DebtInstrument, us-gaap:LongtermDebtType

prft:ConvertibleSeniorNotesDue2023, us-gaap:ConvertibleDebt


Gains
Period End2020-12-312020-09-30
Value-4500000.0-4300000.0
Percentage of GainsLossesOnExtinguishmentOfDebt2250.099.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-2.8-2.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax prft:ConvertibleSeniorNotesDue2023 us-gaap:ConvertibleDebt0.00.0

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

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value2216118.5299.693101313118.7729.5918.4367.9266.4194.462107.6194.536.2037.598.8677.84910114.9356.2179.26311115.2748.59107.4025.2497.0217.4496.5274.9884.9925.7294.8883.0363.2713.5993.303
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax12.39.97.15.46.67.29.59.68.16.67.36.86.55.33.38.56.54.15.26.47.16.37.99.24.55.67.410.29.55.48.810.67.96.28.48.58.06.77.18.27.55.40.06.66.0

Income Tax Expense Benefit

us-gaap:IncomeTaxExpenseBenefit

us-gaap:IncomeTaxExpenseBenefit


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value6.1453.1953.1832.3523.0841.5291.9474.1242.9991.7462.1142.1312.0771.491-1.9733.5055.211.8212.512.0453.0522.4433.0483.6910.9382.1512.8384.6374.6532.2293.0763.0232.841.1262.6452.3072.9242.0022.2712.2632.1211.2431.9641.3461.252
Percentage of IncomeTaxExpenseBenefit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax3.31.92.01.52.11.11.32.92.11.31.61.71.71.2-1.52.84.51.62.11.72.52.02.33.10.91.92.34.04.02.33.23.13.01.33.22.63.62.73.23.23.22.20.02.52.3

Income Taxes Paid Net

us-gaap:IncomeTaxesPaidNet

us-gaap:IncomeTaxesPaidNet


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value8.7961.2181.4742.1941.1910.3971.8812.4832.6050.4362.6880.8190.9420.6785.3492.5230.9650.2372.4511.4660.5280.5935.1090.6453.6760.5143.7282.533.8360.4582.8222.7881.6780.5743.6161.9273.3510.7932.1191.6542.5991.4381.341.519
Percentage of IncomeTaxesPaidNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax4.80.70.91.40.80.31.31.71.80.32.00.70.80.64.02.00.80.22.01.20.40.53.80.53.40.53.02.23.30.52.92.91.80.74.32.24.11.13.02.44.02.60.02.8

Interest Expense Debt

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

us-gaap:InterestExpenseDebt

prft:ConvertibleSeniorNotesDue2023, us-gaap:SeniorNotes


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value75000.074000.0115000.01091000.02051000.02037000.02022000.02010000.01996000.01983000.01971000.0435000.0
Percentage of InterestExpenseDebt100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.00.10.71.41.41.41.41.41.51.50.4
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax prft:ConvertibleSeniorNotesDue2023 us-gaap:SeniorNotes0.00.00.00.00.00.00.00.00.00.00.00.0

prft:ConvertibleSeniorNotesDue2025, us-gaap:SeniorNotes


Interest
Period End2021-06-302021-03-312020-12-312020-09-30
Value3207000.03185000.03144000.01642000.0
Percentage of InterestExpenseDebt4276.04304.12733.9150.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.71.91.91.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax prft:ConvertibleSeniorNotesDue2025 us-gaap:SeniorNotes0.00.00.00.0

Interest Paid Net

us-gaap:InterestPaidNet

us-gaap:InterestPaidNet


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-30
Value10000.01445000.090000.01508000.054000.01759000.068000.01762000.047000.01797000.0122000.0471000.0513000.0293000.0629000.0208000.0479000.0235000.0276000.0351000.0487000.0373000.0518000.0762000.0523000.0202000.0407000.0302000.0124000.0115000.045000.03000.00
Percentage of InterestPaidNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.90.11.00.01.20.01.20.01.30.10.40.40.20.50.20.40.20.20.30.40.30.40.60.50.20.30.30.10.10.00.00.0

Net Income Loss

us-gaap:NetIncomeLoss

us-gaap:NetIncomeLoss


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value16138.4216.1776.6098.974119.7798.5287.0267.4776.3055.8494.9286.4367.0272.4092.7093.6935.5455.8155.4067.577.3743.9974.0666.4247.3066.3873.0455.5137.2344.5624.1234.3765.1423.6032.9862.7213.4662.7671.7931.3072.2532.051
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax9.08.05.23.94.56.28.16.86.05.35.75.14.84.14.85.72.12.43.14.74.74.45.76.13.73.75.16.25.53.15.77.54.84.95.35.94.44.03.94.94.23.20.04.13.7

us-gaap:NetIncomeLoss us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-30
Value16138.4216.1776.6098.974119.7798.5287.0267.4766.3055.8494.9286.4357.0272.412.7093.6935.5455.8155.4067.577.3743.9974.0666.4257.3056.3883.0455.5137.2344.5624.1234.3765.1423.6032.9862.7213.466
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax9.08.05.23.94.56.28.16.86.05.35.75.14.84.14.85.72.12.43.14.74.74.45.76.13.73.75.16.25.53.15.77.54.84.95.35.94.44.03.94.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Operating Income Loss

us-gaap:OperatingIncomeLoss

us-gaap:OperatingIncomeLoss


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value26201515111215151310119.2618.4916.7914.939108.2254.8596.4828.0149.2378.47211115.4747.059.7312115.4218.586107.5385.2087.0387.5376.5544.9554.945.7174.8812.9943.1743.5313.27
Percentage of OperatingIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax14.211.99.59.98.08.510.810.99.47.98.77.57.05.63.78.97.04.45.46.77.46.88.39.65.06.47.710.69.85.68.810.78.06.18.58.68.06.67.08.17.45.30.06.55.9

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

us-gaap:OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax

us-gaap:OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value-1273000.0-4286000.08671000.0-1074000.0-78000.0-974000.057000.0-285000.066000.0171000.038000.0-363000.0-554000.0-98000.0113000.0137000.0267000.0316000.0-587000.0-67000.0-372000.0192000.0-477000.0-595000.019000.0-171000.0-145000.0-99000.053000.0-82000.0-39000.021000.070000.0-124000.0-36000.049000.0-79000.039000.015000.0-97000.014000.033000.0
Percentage of OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.7-2.55.3-0.7-0.1-0.70.0-0.20.00.10.0-0.3-0.5-0.10.10.10.20.3-0.5-0.1-0.30.2-0.4-0.50.0-0.2-0.1-0.10.0-0.1-0.00.00.1-0.1-0.00.1-0.10.10.0-0.10.00.1

us-gaap:OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value-1273000.0-4286000.08671000.0-1074000.0-78000.0-974000.057000.0-285000.066000.0171000.038000.0-363000.0-554000.0-98000.0113000.0137000.0267000.0316000.0-587000.0-67000.0-372000.0192000.0-477000.0-595000.019000.0-171000.0-145000.0-99000.053000.0-82000.0-39000.021000.070000.0-124000.0-36000.049000.0-79000.039000.0
Percentage of OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.7-2.55.3-0.7-0.1-0.70.0-0.20.00.10.0-0.3-0.5-0.10.10.10.20.3-0.5-0.1-0.30.2-0.4-0.50.0-0.2-0.1-0.10.0-0.1-0.00.00.1-0.1-0.00.1-0.10.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Other Nonoperating Income Expense

us-gaap:OtherNonoperatingIncomeExpense

us-gaap:OtherNonoperatingIncomeExpense


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value-9000.0-122000.0-277000.09000.015000.0-7000.0-7000.0-10000.09000.035000.031000.06000.0-52000.02000.0-83000.015000.051000.018000.034000.0-89000.097000.0-103000.0-32000.0-29000.09000.0-280000.0-84000.010000.049000.020000.0142000.07000.0-83000.046000.0-5000.05000.0-2000.046000.051000.013000.0-24000.06000.041000.031000.0-8000.0
Percentage of OtherNonoperatingIncomeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.0-0.1-0.20.00.0-0.0-0.0-0.00.00.00.00.0-0.00.0-0.10.00.00.00.0-0.10.1-0.1-0.0-0.00.0-0.3-0.10.00.00.00.10.0-0.10.1-0.00.0-0.00.10.10.0-0.00.00.00.1-0.0

Revenue From Contract With Customer Excluding Assessed Tax

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value18416916215714614514514414113313112312112013312311711111911912412313312010811012511611697979694848387817470706556555455
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ProductOrService

prft:OtherServices


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
Value3.2683.8284.0083.9053.7374.3683.9564.1994.3913.9364.7194.3964.5384.683
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.82.32.52.52.63.02.72.93.12.93.63.53.73.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.82.32.52.52.63.02.72.93.12.93.63.53.73.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax prft:OtherServices100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

prft:ProfessionalServices


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
Value180164157152142141139139136128125118116115
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax98.097.496.996.997.196.996.396.796.596.395.195.695.595.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax98.097.496.996.997.196.996.396.796.596.395.195.695.595.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax prft:ProfessionalServices100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

prft:SoftwareAndHardware


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
Value0.3610.6110.9640.9230.5030.161.4010.6240.6350.9491.6881.0540.8860.746166.3239.276.998
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.20.40.60.60.30.11.00.40.40.71.30.90.70.612.05.17.96.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.20.40.60.60.30.11.00.40.40.71.30.90.70.612.05.17.96.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax prft:SoftwareAndHardware100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:TechnologyService


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-09-30
Value183168161156145145143144141132130122120120117
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax99.899.699.499.499.799.999.099.699.699.398.799.199.399.494.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax99.899.699.499.499.799.999.099.699.699.398.799.199.399.494.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:TechnologyService100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ProductOrService, us-gaap:ContractWithCustomerBasisOfPricing

prft:ProfessionalServices, prft:FixedPricePercentCompleteContract


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
Value1211121314119.1479.4651012119.7317.8989.112
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax6.66.87.58.89.68.06.36.57.39.38.77.96.57.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax6.66.87.58.89.68.06.36.57.39.38.77.96.57.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax prft:ProfessionalServices prft:FixedPricePercentCompleteContract100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

prft:ProfessionalServices, prft:ReimbursableExpenses


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
Value2.5622.2542.6731.5131.534.3943.2833.8874.393.9143.883.2233.2153.03
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.41.31.61.01.03.02.32.73.12.92.92.62.62.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.41.31.61.01.03.02.32.73.12.92.92.62.62.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax prft:ProfessionalServices prft:ReimbursableExpenses100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

prft:ProfessionalServices, us-gaap:FixedPriceContract


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
Value2622232224252726252422202021
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax14.413.314.214.516.617.218.918.318.318.117.016.516.717.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax14.413.314.214.516.617.218.918.318.318.117.016.516.717.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax prft:ProfessionalServices us-gaap:FixedPriceContract100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

prft:ProfessionalServices, us-gaap:TimeAndMaterialsContract


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
Value139128119114102999999968887858482
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax75.675.973.672.769.968.768.969.167.766.066.568.769.767.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax75.675.973.672.769.968.768.969.167.766.066.568.769.767.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax prft:ProfessionalServices us-gaap:TimeAndMaterialsContract100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ProductOrService, us-gaap:ContractWithCustomerBasisOfPricing, us-gaap:TimingOfTransferOfGoodOrService

prft:ProfessionalServices, prft:FixedPricePercentCompleteContract, us-gaap:TransferredOverTime


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
Value1211121314119.1479.4651012119.7317.8989.112
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax6.66.87.58.89.68.06.36.57.39.38.77.96.57.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax6.66.87.58.89.68.06.36.57.39.38.77.96.57.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax prft:ProfessionalServices prft:FixedPricePercentCompleteContract us-gaap:TransferredOverTime100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

prft:ProfessionalServices, prft:ReimbursableExpenses, us-gaap:TransferredOverTime


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
Value2.5622.2542.6731.5131.534.3943.2833.8874.393.9143.883.2233.2153.03
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.41.31.61.01.03.02.32.73.12.92.92.62.62.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.41.31.61.01.03.02.32.73.12.92.92.62.62.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax prft:ProfessionalServices prft:ReimbursableExpenses us-gaap:TransferredOverTime100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

prft:ProfessionalServices, us-gaap:FixedPriceContract, us-gaap:TransferredOverTime


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
Value2622232224252726252422202021
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax14.413.314.214.516.617.218.918.318.318.117.016.516.717.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax14.413.314.214.516.617.218.918.318.318.117.016.516.717.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax prft:ProfessionalServices us-gaap:FixedPriceContract us-gaap:TransferredOverTime100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

prft:ProfessionalServices, us-gaap:TimeAndMaterialsContract, us-gaap:TransferredOverTime


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
Value139128119114102999999968887858482
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax75.675.973.672.769.968.768.969.167.766.066.568.769.767.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax75.675.973.672.769.968.768.969.167.766.066.568.769.767.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax prft:ProfessionalServices us-gaap:TimeAndMaterialsContract us-gaap:TransferredOverTime100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ProductOrService, us-gaap:TimingOfTransferOfGoodOrService

prft:OtherServices, us-gaap:TransferredAtPointInTime


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
Value0.3880.7110.7860.5370.4210.7380.7040.7160.8670.5911.1340.7860.7840.818
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.20.40.50.30.30.50.50.50.60.40.90.60.60.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.20.40.50.30.30.50.50.50.60.40.90.60.60.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax prft:OtherServices us-gaap:TransferredAtPointInTime100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

prft:OtherServices, us-gaap:TransferredOverTime


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
Value2.883.1173.2223.3683.3163.633.2523.4833.5243.3453.5853.613.7543.865
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.61.82.02.12.32.52.22.42.52.52.72.93.13.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.61.82.02.12.32.52.22.42.52.52.72.93.13.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax prft:OtherServices us-gaap:TransferredOverTime100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

prft:ProfessionalServices, us-gaap:TransferredOverTime


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
Value180164157152142141139139136128125118116115
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax98.097.496.996.997.196.996.396.796.596.395.195.695.595.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax98.097.496.996.997.196.996.396.796.596.395.195.695.595.5
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax prft:ProfessionalServices us-gaap:TransferredOverTime100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

prft:SoftwareAndHardware, us-gaap:TransferredAtPointInTime


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
Value0.3610.6110.9640.9230.5030.161.4010.6240.6350.9491.6881.0540.8860.746
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.20.40.60.60.30.11.00.40.40.71.30.90.70.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.20.40.60.60.30.11.00.40.40.71.30.90.70.6
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax prft:SoftwareAndHardware us-gaap:TransferredAtPointInTime100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:TechnologyService, us-gaap:TransferredAtPointInTime


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
Value0.3880.7110.7860.5370.4210.7380.7040.7160.8670.5911.1340.7860.7840.818
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.20.40.50.30.30.50.50.50.60.40.90.60.60.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.20.40.50.30.30.50.50.50.60.40.90.60.60.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:TechnologyService us-gaap:TransferredAtPointInTime100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:TechnologyService, us-gaap:TransferredOverTime


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
Value183168160156145144143143140132128122120119
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax99.699.298.999.199.499.498.599.198.998.897.998.598.698.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax99.699.298.999.199.499.498.599.198.998.897.998.598.698.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:TechnologyService us-gaap:TransferredOverTime100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:StatementGeographical

country:CA


Revenue
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
Value0.8110.6030.8831.0791.2820.9130.7010.5810.5710.80.7391.371
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.50.40.60.70.90.60.50.40.40.60.61.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.50.40.60.70.90.60.50.40.40.60.61.1
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax country:CA100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

country:US


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value180165159154143142141141138130129121119117
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax97.997.997.997.798.197.997.598.097.697.598.598.097.997.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax97.997.997.997.798.197.997.598.097.697.598.598.097.997.2
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax country:US100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

prft:OtherCountries


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value3.7863.5332.6472.9971.9641.9132.3331.9222.652.7881.4621.6931.8482.042
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.12.11.61.91.31.31.61.31.92.11.11.41.51.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.12.11.61.91.31.31.61.31.92.11.11.41.51.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax prft:OtherCountries100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:TimingOfTransferOfGoodOrService

us-gaap:TransferredAtPointInTime


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
Value0.7491.3221.751.460.9240.8982.1051.341.5021.542.8221.841.671.564
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.40.81.10.90.60.61.50.91.11.22.11.51.41.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.40.81.10.90.60.61.50.91.11.22.11.51.41.3
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:TransferredAtPointInTime100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:TransferredOverTime


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
Value183168160156145144143143140132128122120119
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax99.699.298.999.199.499.498.599.198.998.897.998.598.698.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax99.699.298.999.199.499.498.599.198.998.897.998.598.698.7
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:TransferredOverTime100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Revenues

us-gaap:Revenues

us-gaap:Revenues


Revenues
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value18416916215714614514514414113313112312112013312311711111911912412313312010811012511611697979694848387817470706556555455
Percentage of Revenues100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Selling General And Administrative Expense

us-gaap:SellingGeneralAndAdministrativeExpense

us-gaap:SellingGeneralAndAdministrativeExpense


Selling
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value373333343333333433323229272829272625242425262723242424222220202018171517161413131311101112
Percentage of SellingGeneralAndAdministrativeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax20.320.120.321.923.122.823.423.923.424.324.723.722.923.822.021.922.323.120.520.520.621.620.519.622.921.719.719.019.221.320.921.220.021.019.020.320.219.819.019.720.220.019.621.422.4

Assets

us-gaap:Assets

us-gaap:Assets


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value786767785754715637640606604567570549504488499490491450456450456466474450433435426429420376325304306269267273260237223221215207
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Liabilities

us-gaap:Liabilities

us-gaap:Liabilities


Liabilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value3743683913673052442592372452182161941301191321241319297789211112511410811512112913199665362293241382724272730
Percentage of Liabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets47.648.149.848.842.738.340.539.140.638.438.035.425.924.426.625.326.820.521.317.420.423.826.525.425.026.528.530.131.226.420.317.620.511.012.315.014.911.511.212.512.714.7

Liabilities And Stockholders Equity

us-gaap:LiabilitiesAndStockholdersEquity

us-gaap:LiabilitiesAndStockholdersEquity


Liabilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value786767785754715637640606604567570549504488499490491450456450456466474450433435426429420376325304306269267273260237223221215207
Percentage of LiabilitiesAndStockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Stockholders Equity

us-gaap:StockholdersEquity

us-gaap:StockholdersEquity


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-312009-12-312008-12-31
Value411398394386410393381369359349353355373369366366359358359371363355348336325320304300289277259250243239234232221210198193187177168174
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets52.451.950.251.257.361.759.560.959.461.662.064.674.175.673.474.773.279.578.782.679.676.273.574.675.073.571.569.968.873.679.782.479.589.087.785.085.188.588.887.587.385.30.00.0

us-gaap:StockholdersEquity us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-312009-12-312008-12-31
Value-1.813-0.543.746-4.776-3.702-3.624-2.65-2.636-2.351-2.417-2.588-2.837-2.474-1.92-1.822-2.023-2.16-2.427-2.743-2.122-2.055-1.683-1.875-1.398-0.803-0.822-0.651-0.506-0.407-0.46-0.378-0.339-0.36-0.43-0.306-0.27-0.319-0.24-0.279-0.294-0.197-0.225-0.273-0.338
Percentage of StockholdersEquity-0.4-0.11.0-1.2-0.9-0.9-0.7-0.7-0.7-0.7-0.7-0.8-0.7-0.5-0.5-0.6-0.6-0.7-0.8-0.6-0.6-0.5-0.5-0.4-0.2-0.3-0.2-0.2-0.1-0.2-0.1-0.1-0.1-0.2-0.1-0.1-0.1-0.1-0.1-0.2-0.1-0.1-0.2-0.2
Percentage of Assets-0.2-0.10.5-0.6-0.5-0.6-0.4-0.4-0.4-0.4-0.5-0.5-0.5-0.4-0.4-0.4-0.4-0.5-0.6-0.5-0.5-0.4-0.4-0.3-0.2-0.2-0.2-0.1-0.1-0.1-0.1-0.1-0.1-0.2-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.10.00.0
Percentage of Assets us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AdditionalPaidInCapital


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-312009-12-312008-12-31
Value470465459457475465455451447441437431414407403400396385379375372368364358353349334330326314297291287279276272266257248243236224208197
Percentage of StockholdersEquity114.1116.7116.7118.4115.9118.2119.5122.2124.5126.2123.6121.6110.9110.3110.3109.2110.4107.5105.5100.9102.4103.6104.6106.5108.7109.3109.8110.1112.8113.7114.8116.4118.2116.5117.8116.9120.0122.6125.1125.5126.1127.0123.6113.1
Percentage of Assets59.860.658.560.766.472.971.174.473.977.776.678.682.283.480.981.680.885.583.083.381.678.976.979.481.580.478.576.977.683.791.595.994.0103.6103.499.4102.1108.5111.1109.8110.1108.30.00.0
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CommonStock


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-312009-12-312008-12-31
Value0.0510.0510.050.050.050.050.0490.0490.0490.0490.0480.0480.0480.0480.0470.0470.0470.0460.0460.0450.0450.0450.0450.0440.0440.0440.0430.0430.0430.0420.0410.040.040.0390.0390.0380.0380.0370.0360.0350.0350.0330.0320.03
Percentage of StockholdersEquity0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-312009-12-312008-12-31
Value249233219211205198189177168159152145138133128121114112109105100948981747066595245423730252117118.3285.3422.621-0.845-5.405-11.885-13.348
Percentage of StockholdersEquity60.658.555.754.750.050.449.848.246.845.643.240.937.236.035.033.231.931.330.528.427.626.625.524.222.821.921.719.818.116.616.514.912.410.79.27.35.44.02.71.4-0.4-3.1-7.1-7.6
Percentage of Assets31.830.428.028.028.731.129.629.327.828.126.826.427.527.225.724.823.324.924.023.522.020.218.818.117.116.115.513.912.412.213.212.39.89.58.06.24.63.52.41.2-0.4-2.60.00.0
Percentage of Assets us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:TreasuryStock


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-312009-12-312008-12-31
Value-306.27-299.367-289.225-277.597-266.485-266.459-261.624-257.435-253.901-249.036-233.676-218.891-177.301-169.165-163.871-153.569-149.841-136.859-126.442-107.226-107.123-105.548-103.197-101.837-101.624-99.03-95.353-89.401-89.073-83.38-81.051-78.052-74.145-64.644-62.97-56.182-56.08-55.593-54.995-51.73-48.018-42.205-27.529-9.179
Percentage of StockholdersEquity-74.3-75.1-73.4-71.8-65.0-67.7-68.7-69.7-70.7-71.2-66.1-61.7-47.4-45.8-44.7-41.9-41.7-38.2-35.2-28.8-29.5-29.7-29.6-30.3-31.2-30.9-31.3-29.8-30.8-30.1-31.2-31.1-30.5-27.0-26.9-24.1-25.3-26.5-27.6-26.7-25.6-23.8-16.4-5.3
Percentage of Assets-39.0-39.0-36.8-36.8-37.2-41.8-40.8-42.4-42.0-43.8-41.0-39.9-35.1-34.6-32.8-31.3-30.5-30.4-27.7-23.8-23.5-22.6-21.8-22.6-23.4-22.7-22.4-20.8-21.2-22.1-24.9-25.7-24.2-24.0-23.6-20.5-21.5-23.4-24.6-23.4-22.3-20.30.00.0
Percentage of Assets us-gaap:TreasuryStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Assets Current

us-gaap:AssetsCurrent

us-gaap:AssetsCurrent


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value248222226197159169211174169154177161125123129116113109122122124134139127114114132132120100959596828086827274717776
Percentage of AssetsCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets31.628.928.826.222.326.533.128.828.127.231.229.424.925.225.923.823.124.226.827.127.328.929.528.326.326.431.030.828.726.629.231.531.530.530.331.531.830.733.532.135.836.8

Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value867283501929703634274444105.4846.307
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets11.09.410.66.62.74.611.06.05.74.97.98.22.11.11.3

Accounts Receivable Net Current

us-gaap:AccountsReceivableNetCurrent

us-gaap:AccountsReceivableNetCurrent


Accounts
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value8781858578778777746412210910710811210810087103106109116120111969911311710286788385716978746660625848
Percentage of AccountsReceivableNetCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets11.210.710.911.310.912.113.612.812.311.321.520.021.322.222.522.020.519.522.723.624.024.925.424.822.322.826.727.324.322.924.227.428.126.526.128.528.727.927.228.327.123.4

Receivables Net Current

us-gaap:ReceivablesNetCurrent

us-gaap:ReceivablesNetCurrent


Receivables
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value149138133137127126129126122115122
Percentage of ReceivablesNetCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets19.018.116.918.217.919.920.220.820.320.321.5

Other Assets Current

us-gaap:OtherAssetsCurrent

us-gaap:OtherAssetsCurrent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value5795000.04688000.04646000.04630000.06226000.06600000.07404000.05973000.07896000.06497000.05711000.02212000.03483000.04444000.06237000.01776000.03051000.05924000.05331000.02457000.02228000.06067000.07032000.03261000.07028000.05105000.04679000.07131000.09415000.06373000.06759000.04695000.03747000.04458000.03717000.03097000.02543000.02523000.03118000.04662000.04891000.02584000.0
Percentage of OtherAssetsCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.70.60.60.60.91.01.21.01.31.11.00.40.70.91.20.40.61.31.20.50.51.31.50.71.61.21.11.72.21.72.11.51.21.71.41.11.01.11.42.12.31.2

Property Plant And Equipment Gross

us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType

us-gaap:PropertyPlantAndEquipmentGross

us-gaap:ComputerEquipment


Property
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-31
Value1716151514131215151414131313131313121212121211111010109.7098.9448.4738.1048.6268.2057.4756.906
Percentage of PropertyPlantAndEquipmentGross100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets2.22.12.02.02.02.12.02.62.62.62.52.52.72.72.62.72.72.82.72.72.72.62.42.42.52.52.42.32.12.32.52.82.72.82.6
Percentage of Assets us-gaap:ComputerEquipment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:ComputerSoftwareIntangibleAsset


Property
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value6.0125.3415.3425.3345.3195.2755.2725.0425.1599.1867.8836.8286.042
Percentage of PropertyPlantAndEquipmentGross34.733.234.235.437.138.640.635.639.475.468.766.874.6
Percentage of Assets0.80.70.70.70.70.80.80.91.02.01.71.61.9
Percentage of Assets us-gaap:ComputerSoftwareIntangibleAsset0.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:FurnitureAndFixtures


Property
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-31
Value4.494.5064.5974.3774.2624.0983.8835.1334.9014.6814.6534.4724.2034.0923.7723.5483.5073.3253.3063.223.2133.2112.9572.9482.8972.8692.4422.2972.2171.9991.8912.1582.1552.1022.046
Percentage of PropertyPlantAndEquipmentGross25.928.029.429.029.830.029.932.731.831.732.932.331.330.828.827.026.926.827.126.725.826.625.826.727.026.923.923.724.823.623.325.026.328.129.6
Percentage of Assets0.60.60.60.60.60.60.60.80.80.80.80.80.80.80.80.70.70.70.70.70.70.70.60.70.70.70.60.50.50.50.60.70.70.80.8
Percentage of Assets us-gaap:FurnitureAndFixtures0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:LeaseholdImprovements


Property
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-31
Value7.0417.0836.6076.5496.3445.9525.6746.4784.4233.5133.3963.1723.123.0382.8362.2952.2211.9671.9582.7122.6342.5572.5172.4842.4742.3322.0752.0222.0512.0331.9971.9861.9811.8291.775
Percentage of PropertyPlantAndEquipmentGross40.644.042.243.544.343.643.741.228.723.824.022.923.222.921.617.417.015.916.122.521.221.221.922.523.121.820.320.822.924.024.623.024.124.525.7
Percentage of Assets0.90.90.80.90.90.90.91.10.70.60.60.60.60.60.60.50.50.40.40.60.60.50.50.60.60.50.50.50.50.50.60.70.60.70.7
Percentage of Assets us-gaap:LeaseholdImprovements0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Accumulated Depreciation Depletion And Amortization Property Plant And Equipment

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment


Accumulated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-31
Value22212019171615201921201919181716151917171618161615141312111110109.648-9.0488.3357.7587.3746.989
Percentage of AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets2.92.82.62.62.52.62.43.33.23.73.63.63.83.83.63.43.34.23.93.93.73.93.63.63.53.43.22.92.82.93.23.53.2-3.43.12.82.83.1

Amortization Of Intangible Assets

us-gaap:AmortizationOfIntangibleAssets

us-gaap:AmortizationOfIntangibleAssets


Amortization
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value6.3337.0527.37.2374.3983.9224.0073.9974.014.1374.3274.0094.1373.8833.9273.9363.5373.6253.4343.2663.3063.3653.253.3573.4113.8013.9424.0453.732.7362.2241.9552.0181.7772.1632.2581.8411.5651.6781.9841.5361.1430.9650.9751.072
Percentage of AmortizationOfIntangibleAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Property Plant And Equipment Net

us-gaap:PropertyPlantAndEquipmentNet

us-gaap:PropertyPlantAndEquipmentNet


Property
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value1211111212121212106.9776.6776.5656.6786.9817.1457.4258.3018.1378.8889.537107.7817.8918.048.3698.3367.9667.9457.9747.5787.7098.2518.655.9814.3984.5264.0713.7973.493.6543.4482.355
Percentage of PropertyPlantAndEquipmentNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.51.51.51.61.71.91.92.01.71.21.21.21.31.41.41.51.71.81.92.12.31.71.71.81.91.91.91.81.92.02.42.72.82.21.61.71.61.61.61.71.61.1

Goodwill

us-gaap:Goodwill

us-gaap:Goodwill


Goodwill
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value420421427419417361335335335327327321315305305304304281275269269269269259255252236236235221193175175161160160150142132131120115
Percentage of Goodwill100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets53.555.054.555.658.356.752.455.355.657.757.558.662.562.461.262.162.062.460.359.859.157.756.857.558.858.055.454.955.958.959.457.657.260.160.258.557.959.959.059.656.255.5

Intangible Assets Net Excluding Goodwill

us-gaap:IntangibleAssetsNetExcludingGoodwill

us-gaap:IntangibleAssetsNetExcludingGoodwill


Intangible
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value48556367754937414544484948475155594645454750535252554649534325212215171917151011108.829
Percentage of IntangibleAssetsNetExcludingGoodwill100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets6.27.28.18.910.67.85.96.97.57.88.49.19.79.710.211.312.010.49.910.010.510.911.311.612.012.710.811.512.611.57.87.07.35.96.57.16.76.34.55.35.04.3

us-gaap:IntangibleAssetsNetExcludingGoodwill us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:CustomerRelationships


Intangible
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-31
Value444853546042323538384142414043464939373740424544434637404235201719131516148.737
Percentage of IntangibleAssetsNetExcludingGoodwill90.587.183.981.680.186.286.286.186.286.986.485.185.785.184.483.983.483.582.482.483.584.385.385.084.184.182.081.580.981.579.782.985.288.388.786.884.286.3
Percentage of Assets5.66.36.87.38.56.75.15.96.46.87.37.78.38.28.69.510.08.78.18.38.89.29.69.810.110.78.99.410.29.46.25.86.25.25.86.15.73.9
Percentage of Assets us-gaap:CustomerRelationships0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:NoncompeteAgreements


Intangible
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-31
Value0.4870.5630.6480.7040.7850.6890.6630.7330.8020.730.8010.8370.9010.7680.8490.9581.040.6460.4610.3520.3690.4560.5160.5510.6110.6910.7350.8160.8970.9510.7620.7650.8430.6620.7310.8030.7610.764
Percentage of IntangibleAssetsNetExcludingGoodwill1.01.01.01.01.01.41.71.81.81.71.71.71.81.61.71.71.81.41.00.80.80.91.01.11.21.21.61.61.72.23.03.63.84.24.24.14.37.5
Percentage of Assets0.10.10.10.10.10.10.10.10.10.10.10.20.20.20.20.20.20.10.10.10.10.10.10.10.10.20.20.20.20.30.20.30.30.20.30.30.30.3
Percentage of Assets us-gaap:NoncompeteAgreements0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OrderOrProductionBacklog


Intangible
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value1.8254.4126.0378.3630.9610.115
Percentage of IntangibleAssetsNetExcludingGoodwill3.36.99.011.01.90.3
Percentage of Assets0.20.60.81.20.20.0
Percentage of Assets us-gaap:OrderOrProductionBacklog0.00.00.00.00.00.0

us-gaap:SoftwareDevelopment


Intangible
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-31
Value4.1794.6635.0315.3845.5825.0964.4374.6154.7284.5614.8965.5655.5595.8626.2866.6667.0187.0557.2467.5427.4447.2787.0017.27.3527.4217.4817.3177.2125.2474.0962.6271.8811.1731.0531.0781.1610.559
Percentage of IntangibleAssetsNetExcludingGoodwill8.58.47.98.07.410.311.711.110.510.310.211.211.312.412.312.111.915.116.116.715.514.413.113.814.113.416.214.813.612.116.112.38.47.46.15.66.65.5
Percentage of Assets0.50.60.60.70.80.80.70.80.80.80.91.01.11.21.31.41.41.61.61.71.61.61.51.61.71.71.81.71.71.41.30.90.60.40.40.40.40.2
Percentage of Assets us-gaap:SoftwareDevelopment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:TradeNames


Intangible
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-31
Value0.0670.1680.2540.3640.1030.0230.0410.0650.0290.0640.0670.0520.0230.0470.0870.130.0380.0230.010.0170.0420.0670.0460.030.0520.0190.0610.1250.1340.0760.0680.0970.0210.0610.110.1150.068
Percentage of IntangibleAssetsNetExcludingGoodwill0.10.30.40.50.20.10.10.10.10.10.10.10.00.10.20.20.10.10.00.00.10.10.10.10.10.00.10.20.30.30.30.40.10.40.60.70.7
Percentage of Assets0.00.00.00.10.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:TradeNames0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Operating Lease Right Of Use Asset

us-gaap:OperatingLeaseRightOfUseAsset

us-gaap:OperatingLeaseRightOfUseAsset


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value353738403530272728200.0
Percentage of OperatingLeaseRightOfUseAsset100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0
Percentage of Assets4.54.84.95.35.04.84.34.54.63.70.0

Other Assets Noncurrent

us-gaap:OtherAssetsNoncurrent

us-gaap:OtherAssetsNoncurrent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value211917171414151415139.9799.6627.8116.1966.4036.4356.1325.214.8693.9393.8913.8133.933.8294.0174.2513.8233.8423.8293.8613.813.6643.3733.7053.6693.65.3253.533.2882.9263.0622.655
Percentage of OtherAssetsNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets2.72.52.22.42.12.32.42.42.52.41.71.81.51.31.31.31.21.21.10.90.90.80.80.80.91.00.90.90.91.01.21.21.11.41.41.32.01.51.51.31.41.3

Accounts Payable Current

us-gaap:AccountsPayableCurrent

us-gaap:AccountsPayableCurrent


Accounts
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value26162516161523141512241014112311129.98418131412181311102213136.6747.6676.205116.5217.9597.5384.944.445.0294.0333.2896.072
Percentage of AccountsPayableCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets3.32.13.32.22.22.43.62.42.62.24.32.02.92.34.62.42.52.24.03.03.22.74.03.12.62.55.23.13.11.82.42.03.72.43.02.81.91.92.21.81.52.9

Liabilities Current

us-gaap:LiabilitiesCurrent

us-gaap:LiabilitiesCurrent


Liabilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value1131031281009765846474547454564561404432463542415641383755414732373237212828251923252528
Percentage of LiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets14.513.516.413.313.610.313.210.712.29.713.110.011.19.212.38.29.07.310.18.09.38.911.99.28.88.612.99.711.38.611.710.712.38.210.710.39.68.310.511.711.813.8

us-gaap:LiabilitiesCurrent us-gaap:PropertyPlantAndEquipmentByType

us-gaap:SoftwareAndSoftwareDevelopmentCosts


Liabilities
Period End2020-12-312019-12-312019-09-302019-06-30
Value1.71.71.93.3
Percentage of LiabilitiesCurrent1.32.02.94.5
Percentage of Assets0.20.30.30.5
Percentage of Assets us-gaap:SoftwareAndSoftwareDevelopmentCosts0.00.00.00.0

Operating Lease Liability Current

us-gaap:OperatingLeaseLiabilityCurrent

us-gaap:OperatingLeaseLiabilityCurrent


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value10101010119.5388.9928.7378.3790.0
Percentage of OperatingLeaseLiabilityCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.00.0
Percentage of Assets1.31.31.31.41.61.51.41.41.40.0

Other Liabilities Current

us-gaap:OtherLiabilitiesCurrent

us-gaap:OtherLiabilitiesCurrent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value8787103848149615058425044413438283122272227283727262633283425302626152020201518212222
Percentage of OtherLiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets11.211.413.111.211.37.89.68.39.67.48.88.08.37.07.65.76.55.16.15.06.16.28.06.26.26.17.86.58.26.89.38.68.65.77.77.57.76.48.39.910.310.9

Liabilities Noncurrent

us-gaap:LiabilitiesNoncurrent us-gaap:PropertyPlantAndEquipmentByType

us-gaap:LiabilitiesNoncurrent

us-gaap:SoftwareAndSoftwareDevelopmentCosts


Liabilities
Period End2020-12-31
Value200000.0
Percentage of LiabilitiesNoncurrent100.0
Percentage of Assets0.0
Percentage of Assets us-gaap:SoftwareAndSoftwareDevelopmentCosts0.0

Long Term Debt

us-gaap:LongTermDebt

us-gaap:LongTermDebt


Long
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value18818618318713912512412312212112011955
Percentage of LongTermDebt100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets24.024.323.424.919.419.719.520.420.221.321.021.711.0

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

prft:ConvertibleSeniorNotesDue2023, us-gaap:ConvertibleDebt


Long
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value4.6744.6294.58511127125124123122121120119
Percentage of LongTermDebt2.52.52.55.991.4100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.60.60.61.517.819.719.520.420.221.321.021.7
Percentage of Assets prft:ConvertibleSeniorNotesDue2023 us-gaap:ConvertibleDebt0.00.00.00.00.00.00.00.00.00.00.00.0

prft:ConvertibleSeniorNotesDue2025, us-gaap:ConvertibleDebt


Long
Period End2021-06-302021-03-312020-12-312020-09-30
Value183181179176
Percentage of LongTermDebt97.597.597.594.1
Percentage of Assets23.423.622.823.4
Percentage of Assets prft:ConvertibleSeniorNotesDue2025 us-gaap:ConvertibleDebt0.00.00.00.0

Other Liabilities Noncurrent

us-gaap:OtherLiabilitiesNoncurrent

us-gaap:OtherLiabilitiesNoncurrent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value4551504843313029282721201817161919201914141312111010121312179.2945.0944.6581.6591.4171.3591.261.4061.4611.6871.9481.788
Percentage of OtherLiabilitiesNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets5.86.76.46.46.14.94.84.84.74.83.93.73.73.63.33.94.04.64.23.23.12.92.72.62.42.42.93.03.14.52.91.71.50.60.50.50.50.60.70.80.90.9

Operating Lease Liability Noncurrent

us-gaap:OperatingLeaseLiabilityNoncurrent

us-gaap:OperatingLeaseLiabilityNoncurrent


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value2527293025211919200.0
Percentage of OperatingLeaseLiabilityNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.00.0
Percentage of Assets3.33.63.74.13.53.43.13.23.40.0

Lessee Operating Lease Liability Payments Due Year Two

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo


Lessee
Period End2021-06-302021-03-312020-12-312020-09-30
Value8092000.08050000.09791000.09575000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearTwo100.0100.0100.0100.0
Percentage of Assets1.01.01.21.3

Lessee Operating Lease Liability Payments Due Year Three

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree


Lessee
Period End2021-06-302021-03-312020-12-312020-09-30
Value6257000.06211000.07765000.07563000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearThree100.0100.0100.0100.0
Percentage of Assets0.80.81.01.0

Lessee Operating Lease Liability Payments Due Year Four

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour


Lessee
Period End2021-06-302021-03-312020-12-312020-09-30
Value4706000.04651000.05950000.05853000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearFour100.0100.0100.0100.0
Percentage of Assets0.60.60.80.8

Lessee Operating Lease Liability Payments Due Year Five

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive


Lessee
Period End2020-12-31
Value4389000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearFive100.0
Percentage of Assets0.6

Lessee Operating Lease Liability Payments Due After Year Five

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive


Lessee
Period End2021-06-302021-03-312020-12-312020-09-30
Value5901000.05907000.05630000.09841000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive100.0100.0100.0100.0
Percentage of Assets0.80.80.71.3

Operating Lease Liability

us-gaap:OperatingLeaseLiability

us-gaap:OperatingLeaseLiability


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value36383941363128282921
Percentage of OperatingLeaseLiability100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets4.65.05.05.45.14.94.54.74.83.8

Lessee Operating Lease Liability Payments Due

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue


Lessee
Period End2021-06-302021-03-312020-12-312020-09-30
Value39414244
Percentage of LesseeOperatingLeaseLiabilityPaymentsDue100.0100.0100.0100.0
Percentage of Assets5.05.45.56.0

Lessee Operating Lease Liability Undiscounted Excess Amount

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount


Lessee
Period End2021-06-302021-03-312020-12-312020-09-30
Value3044000.03359000.03526000.03843000.0
Percentage of LesseeOperatingLeaseLiabilityUndiscountedExcessAmount100.0100.0100.0100.0
Percentage of Assets0.40.40.40.5

Stockholders Equity

us-gaap:StockholdersEquity

us-gaap:StockholdersEquity


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-312009-12-312008-12-31
Value411398394386410393381369359349353355373369366366359358359371363355348336325320304300289277259250243239234232221210198193187177168174
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets52.451.950.251.257.361.759.560.959.461.662.064.674.175.673.474.773.279.578.782.679.676.273.574.675.073.571.569.968.873.679.782.479.589.087.785.085.188.588.887.587.385.30.00.0

us-gaap:StockholdersEquity us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-312009-12-312008-12-31
Value-1.813-0.543.746-4.776-3.702-3.624-2.65-2.636-2.351-2.417-2.588-2.837-2.474-1.92-1.822-2.023-2.16-2.427-2.743-2.122-2.055-1.683-1.875-1.398-0.803-0.822-0.651-0.506-0.407-0.46-0.378-0.339-0.36-0.43-0.306-0.27-0.319-0.24-0.279-0.294-0.197-0.225-0.273-0.338
Percentage of StockholdersEquity-0.4-0.11.0-1.2-0.9-0.9-0.7-0.7-0.7-0.7-0.7-0.8-0.7-0.5-0.5-0.6-0.6-0.7-0.8-0.6-0.6-0.5-0.5-0.4-0.2-0.3-0.2-0.2-0.1-0.2-0.1-0.1-0.1-0.2-0.1-0.1-0.1-0.1-0.1-0.2-0.1-0.1-0.2-0.2
Percentage of Assets-0.2-0.10.5-0.6-0.5-0.6-0.4-0.4-0.4-0.4-0.5-0.5-0.5-0.4-0.4-0.4-0.4-0.5-0.6-0.5-0.5-0.4-0.4-0.3-0.2-0.2-0.2-0.1-0.1-0.1-0.1-0.1-0.1-0.2-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.10.00.0
Percentage of Assets us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AdditionalPaidInCapital


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-312009-12-312008-12-31
Value470465459457475465455451447441437431414407403400396385379375372368364358353349334330326314297291287279276272266257248243236224208197
Percentage of StockholdersEquity114.1116.7116.7118.4115.9118.2119.5122.2124.5126.2123.6121.6110.9110.3110.3109.2110.4107.5105.5100.9102.4103.6104.6106.5108.7109.3109.8110.1112.8113.7114.8116.4118.2116.5117.8116.9120.0122.6125.1125.5126.1127.0123.6113.1
Percentage of Assets59.860.658.560.766.472.971.174.473.977.776.678.682.283.480.981.680.885.583.083.381.678.976.979.481.580.478.576.977.683.791.595.994.0103.6103.499.4102.1108.5111.1109.8110.1108.30.00.0
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CommonStock


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-312009-12-312008-12-31
Value0.0510.0510.050.050.050.050.0490.0490.0490.0490.0480.0480.0480.0480.0470.0470.0470.0460.0460.0450.0450.0450.0450.0440.0440.0440.0430.0430.0430.0420.0410.040.040.0390.0390.0380.0380.0370.0360.0350.0350.0330.0320.03
Percentage of StockholdersEquity0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-312009-12-312008-12-31
Value249233219211205198189177168159152145138133128121114112109105100948981747066595245423730252117118.3285.3422.621-0.845-5.405-11.885-13.348
Percentage of StockholdersEquity60.658.555.754.750.050.449.848.246.845.643.240.937.236.035.033.231.931.330.528.427.626.625.524.222.821.921.719.818.116.616.514.912.410.79.27.35.44.02.71.4-0.4-3.1-7.1-7.6
Percentage of Assets31.830.428.028.028.731.129.629.327.828.126.826.427.527.225.724.823.324.924.023.522.020.218.818.117.116.115.513.912.412.213.212.39.89.58.06.24.63.52.41.2-0.4-2.60.00.0
Percentage of Assets us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:TreasuryStock


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-312009-12-312008-12-31
Value-306.27-299.367-289.225-277.597-266.485-266.459-261.624-257.435-253.901-249.036-233.676-218.891-177.301-169.165-163.871-153.569-149.841-136.859-126.442-107.226-107.123-105.548-103.197-101.837-101.624-99.03-95.353-89.401-89.073-83.38-81.051-78.052-74.145-64.644-62.97-56.182-56.08-55.593-54.995-51.73-48.018-42.205-27.529-9.179
Percentage of StockholdersEquity-74.3-75.1-73.4-71.8-65.0-67.7-68.7-69.7-70.7-71.2-66.1-61.7-47.4-45.8-44.7-41.9-41.7-38.2-35.2-28.8-29.5-29.7-29.6-30.3-31.2-30.9-31.3-29.8-30.8-30.1-31.2-31.1-30.5-27.0-26.9-24.1-25.3-26.5-27.6-26.7-25.6-23.8-16.4-5.3
Percentage of Assets-39.0-39.0-36.8-36.8-37.2-41.8-40.8-42.4-42.0-43.8-41.0-39.9-35.1-34.6-32.8-31.3-30.5-30.4-27.7-23.8-23.5-22.6-21.8-22.6-23.4-22.7-22.4-20.8-21.2-22.1-24.9-25.7-24.2-24.0-23.6-20.5-21.5-23.4-24.6-23.4-22.3-20.30.00.0
Percentage of Assets us-gaap:TreasuryStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Common Stock Value

us-gaap:CommonStockValue

us-gaap:CommonStockValue


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value51000.051000.050000.050000.050000.050000.049000.049000.049000.049000.048000.048000.048000.048000.047000.047000.047000.046000.046000.045000.045000.045000.045000.044000.044000.044000.043000.043000.043000.042000.041000.040000.040000.039000.039000.038000.038000.037000.036000.035000.035000.033000.0
Percentage of CommonStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Additional Paid In Capital Common Stock

us-gaap:AdditionalPaidInCapitalCommonStock

us-gaap:AdditionalPaidInCapitalCommonStock


Additional
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value470465459457475465455451447441437431414407403400396385379375372368364358353349334330326314297291287279276272266257248243236224
Percentage of AdditionalPaidInCapitalCommonStock100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets59.860.658.560.766.472.971.174.473.977.776.678.682.283.480.981.680.885.583.083.381.678.976.979.481.580.478.576.977.683.791.595.994.0103.6103.499.4102.1108.5111.1109.8110.1108.3

Retained Earnings Accumulated Deficit

us-gaap:RetainedEarningsAccumulatedDeficit

us-gaap:RetainedEarningsAccumulatedDeficit


Retained
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value249233219211205198189177168159152145138133128121114112109105100948981747066595245423730252117118.3285.3422.621-0.845-5.405
Percentage of RetainedEarningsAccumulatedDeficit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets31.830.428.028.028.731.129.629.327.828.126.826.427.527.225.724.823.324.924.023.522.020.218.818.117.116.115.513.912.412.213.212.39.89.58.06.24.63.52.41.2-0.4-2.6

Accumulated Other Comprehensive Income Loss Net Of Tax

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax


Accumulated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value-1813000.0-540000.03746000.0-4776000.0-3702000.0-3624000.0-2650000.0-2636000.0-2351000.0-2417000.0-2588000.0-2837000.0-2474000.0-1920000.0-1822000.0-2023000.0-2160000.0-2427000.0-2743000.0-2122000.0-2055000.0-1683000.0-1875000.0-1398000.0-803000.0-822000.0-651000.0-506000.0-407000.0-460000.0-378000.0-339000.0-360000.0-430000.0-306000.0-270000.0-319000.0-240000.0-279000.0-294000.0-197000.0-225000.0
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets-0.2-0.10.5-0.6-0.5-0.6-0.4-0.4-0.4-0.4-0.5-0.5-0.5-0.4-0.4-0.4-0.4-0.5-0.6-0.5-0.5-0.4-0.4-0.3-0.2-0.2-0.2-0.1-0.1-0.1-0.1-0.1-0.1-0.2-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.1

Treasury Stock Value

us-gaap:TreasuryStockValue

us-gaap:TreasuryStockValue


Treasury
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value3062992892772662662612572532492332181771691631531491361261071071051031011019995898983817874646256565554514842
Percentage of TreasuryStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets39.039.036.836.837.241.840.842.442.043.841.039.935.134.632.831.330.530.427.723.823.522.621.822.623.422.722.420.821.222.124.925.724.224.023.620.521.523.424.623.422.320.3

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

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue us-gaap:StatementEquityComponents

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue

us-gaap:AdditionalPaidInCapital


Adjustments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-30
Value4.9565.1854.694.4194.6794.7264.134.0964.1084.2474.1713.9453.8523.7623.5013.53.5063.5893.5783.0813.7913.5233.3033.1853.2743.3483.2853.1583.2223.0532.8762.7982.7522.6082.5942.5472.2422.2062.4172.427
Percentage of AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CommonStock


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
Value0.00.0010.00.00.00.0010.00.00.00.0010.00.00.00.001
Percentage of AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue0.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInOperatingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value281.161582241-4.384401324-0.3452513254.14255.24411132310244.436185.214128.36633-2.286.092-3.187211015-0.51818117.611.863125.9982.746-6.8713.9485.068
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax15.60.735.914.028.6-3.027.79.617.0-0.319.610.720.93.418.84.29.812.119.68.820.13.613.84.311.77.626.5-1.95.2-3.321.610.716.9-0.622.113.09.32.517.78.54.2-12.27.19.3

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value-2376000.0-1828000.0-3299000.0-587000.0-62933000.0-31795000.0-1923000.0-3850000.0-12827000.0-1799000.0-6416000.0-11740000.0-12173000.0-959000.0-1039000.0-586000.0-32616000.0-7967000.0-7049000.0-2618000.0-1881000.0-1983000.0-12353000.0-4058000.0-2623000.0-23205000.0-1710000.0-1574000.0-21854000.0-28457000.0-20602000.0-2140000.0-20709000.0-2961000.0-760000.0-11289000.0-11798000.0-14823000.0-816000.0-12982000.03770000.01243000.0-2880000.0812000.0
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-1.3-1.1-2.0-0.4-43.0-21.8-1.3-2.7-9.0-1.3-4.9-9.5-10.0-0.8-0.8-0.5-27.9-7.2-5.9-2.2-1.5-1.6-9.2-3.4-2.4-21.0-1.4-1.3-18.7-29.3-21.1-2.2-22.0-3.5-0.9-12.9-14.4-19.8-1.2-18.55.72.2-5.11.5

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value-11.638-10.037-22.7278.87211-4.795-4.141-7.77-4.824-15.316-19.28933-8.094-3.952-20.302-7.96615-4.848-15.173-8.054-22.362-2.298-5.8490.941-9.57710-26.1182.61917291.071-7.5185.3211.796-15.271-0.8395.7685.874-3.873-3.562-3.4432.34-2.244-6.696
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-6.3-5.9-14.05.67.6-3.3-2.9-5.4-3.4-11.4-14.626.8-6.6-3.3-15.2-6.413.5-4.4-12.7-6.8-18.0-1.9-4.40.8-8.89.2-20.82.215.130.21.1-7.85.72.1-18.4-1.07.17.9-5.5-5.1-5.24.2-4.0-12.3

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

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value14-11.1463330-9.757-41.427342.1386.548-17.25
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax7.9-6.620.419.3-6.7-28.523.61.54.6-12.9

Amortization Of Financing Costs

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

us-gaap:AmortizationOfFinancingCosts

prft:ConvertibleSeniorNotesDue2023, us-gaap:SeniorNotes


Amortization
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value8000.07000.011000.0110000.0206000.0206000.0206000.0206000.0206000.0206000.0207000.045000.0
Percentage of AmortizationOfFinancingCosts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

prft:ConvertibleSeniorNotesDue2025, us-gaap:SeniorNotes


Amortization
Period End2021-06-302021-03-312020-12-312020-09-30
Value288000.0287000.0287000.0151000.0
Percentage of AmortizationOfFinancingCosts3600.04100.02609.1137.3

Deferred Income Tax Expense Benefit

us-gaap:DeferredIncomeTaxExpenseBenefit

us-gaap:DeferredIncomeTaxExpenseBenefit


Deferred
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value-1418000.0455000.0-152000.0-1688000.0-1356000.01608000.043000.0-75000.079000.01994000.0723000.0-119000.0-176000.0950000.0-5058000.0-1116000.0532000.01502000.03909000.0-129000.0-41000.0651000.01848000.0340000.0-241000.0-450000.0-1295000.0312000.0548000.01097000.0686000.01033000.0-697000.0582000.0-856000.0220000.0-676000.0699000.0-720000.01127000.0-410000.0534000.0365000.0110000.0
Percentage of DeferredIncomeTaxExpenseBenefit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Increase Decrease In Accounts Payable

us-gaap:IncreaseDecreaseInAccountsPayable

us-gaap:IncreaseDecreaseInAccountsPayable


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value10-7.8448.233-0.3760.587-7.5838.608-0.6822.494-11.77613-3.6933.349-12.0511-0.0512.06-8.4324.931-1.3272.076-6.0575.0252.6080.254-11.1298.5440.416.382-0.9921.514-4.3563.91-1.4290.4222.5280.109-0.8691.010.3170.273-3.1220.0261.284
Percentage of IncreaseDecreaseInAccountsPayable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInOperatingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value281.161582241-4.384401324-0.3452513254.14255.24411132310244.436185.214128.36633-2.286.092-3.187211015-0.51818117.611.863125.9982.746-6.8713.9485.068
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax15.60.735.914.028.6-3.027.79.617.0-0.319.610.720.93.418.84.29.812.119.68.820.13.613.84.311.77.626.5-1.95.2-3.321.610.716.9-0.622.113.09.32.517.78.54.2-12.27.19.3

Net Income Loss

us-gaap:NetIncomeLoss

us-gaap:NetIncomeLoss


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value16138.4216.1776.6098.974119.7798.5287.0267.4776.3055.8494.9286.4367.0272.4092.7093.6935.5455.8155.4067.577.3743.9974.0666.4247.3066.3873.0455.5137.2344.5624.1234.3765.1423.6032.9862.7213.4662.7671.7931.3072.2532.051
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax9.08.05.23.94.56.28.16.86.05.35.75.14.84.14.85.72.12.43.14.74.74.45.76.13.73.75.16.25.53.15.77.54.84.95.35.94.44.03.94.94.23.22.34.13.7

us-gaap:NetIncomeLoss us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-30
Value16138.4216.1776.6098.974119.7798.5287.0267.4766.3055.8494.9286.4357.0272.412.7093.6935.5455.8155.4067.577.3743.9974.0666.4257.3056.3883.0455.5137.2344.5624.1234.3765.1423.6032.9862.7213.466
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax9.08.05.23.94.56.28.16.86.05.35.75.14.84.14.85.72.12.43.14.74.74.45.76.13.73.75.16.25.53.15.77.54.84.95.35.94.44.03.94.9
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Share Based Compensation

us-gaap:ShareBasedCompensation

us-gaap:ShareBasedCompensation


Share
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value5.2075.1134.9864.6884.8654.6074.9734.0964.1084.2484.1713.9453.8523.7633.5013.53.5063.5893.5793.0813.7913.5233.3033.1853.2743.3483.2863.1583.2223.0532.8762.7982.7522.6082.5952.5472.2422.2062.4182.4272.2762.0573.3012.483
Percentage of ShareBasedCompensation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value-2376000.0-1828000.0-3299000.0-587000.0-62933000.0-31795000.0-1923000.0-3850000.0-12827000.0-1799000.0-6416000.0-11740000.0-12173000.0-959000.0-1039000.0-586000.0-32616000.0-7967000.0-7049000.0-2618000.0-1881000.0-1983000.0-12353000.0-4058000.0-2623000.0-23205000.0-1710000.0-1574000.0-21854000.0-28457000.0-20602000.0-2140000.0-20709000.0-2961000.0-760000.0-11289000.0-11798000.0-14823000.0-816000.0-12982000.03770000.01243000.0-2880000.0812000.0
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-1.3-1.1-2.0-0.4-43.0-21.8-1.3-2.7-9.0-1.3-4.9-9.5-10.0-0.8-0.8-0.5-27.9-7.2-5.9-2.2-1.5-1.6-9.2-3.4-2.4-21.0-1.4-1.3-18.7-29.3-21.1-2.2-22.0-3.5-0.9-12.9-14.4-19.8-1.2-18.55.72.2-5.11.5

Payments To Acquire Property Plant And Equipment

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value2143000.01480000.01386000.01433000.0934000.01513000.01616000.03026000.02128000.01312000.0902000.01618000.0691000.0873000.0840000.0409000.01651000.0461000.0512000.01219000.01312000.01044000.0894000.0807000.01125000.0530000.01042000.0922000.01013000.0697000.0367000.01279000.0740000.02263000.0532000.0547000.0489000.0355000.0383000.0665000.01098000.0630000.0345000.0322000.0
Percentage of PaymentsToAcquirePropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value-11.638-10.037-22.7278.87211-4.795-4.141-7.77-4.824-15.316-19.28933-8.094-3.952-20.302-7.96615-4.848-15.173-8.054-22.362-2.298-5.8490.941-9.57710-26.1182.61917291.071-7.5185.3211.796-15.271-0.8395.7685.874-3.873-3.562-3.4432.34-2.244-6.696
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-6.3-5.9-14.05.67.6-3.3-2.9-5.4-3.4-11.4-14.626.8-6.6-3.3-15.2-6.413.5-4.4-12.7-6.8-18.0-1.9-4.40.8-8.89.2-20.82.215.130.21.1-7.85.72.1-18.4-1.07.17.9-5.5-5.1-5.24.2-4.0-12.3

Payments For Repurchase Of Common Stock

us-gaap:PaymentsForRepurchaseOfCommonStock us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:PaymentsForRepurchaseOfCommonStock

prft:ConvertibleSeniorNotesDue2025, us-gaap:ConvertibleDebt


Payments
Period End2020-08-14
Value24
Percentage of PaymentsForRepurchaseOfCommonStock100.0

Effective Income Tax Rate Continuing Operations

us-gaap:EffectiveIncomeTaxRateContinuingOperations

us-gaap:EffectiveIncomeTaxRateContinuingOperations


Effective
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-30
Value27.019.027.60.3180.146-0.0330.2970.260.199-0.0090.2530.2620.232-0.1490.3330.6840.4020.0190.2690.3440.311-0.0060.3340.190.346-0.0250.3880.4210.4230.0150.2950.3840.215-0.0010.310.4480.4010.0120.3950.434
Percentage of EffectiveIncomeTaxRateContinuingOperations100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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:PlanName

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod

us-gaap:RestrictedStock, prft:LongTermIncentivePlan2012


Share
Period End2021-06-302021-03-312020-12-31
Value0192000.0277000.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod0.0100.0100.0

Deferred Tax Liabilities

us-gaap:DeferredTaxLiabilities

us-gaap:DeferredTaxLiabilities


Deferred
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-312016-12-312015-12-312014-12-31
Value171920172012111111119.2537.68.07.36128.4638.233
Percentage of DeferredTaxLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Unrecognized Tax Benefits

us-gaap:UnrecognizedTaxBenefits

us-gaap:UnrecognizedTaxBenefits


Unrecognized
Period End2021-06-302021-03-312020-12-312020-09-302019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value9500000.07400000.07100000.06700000.04700000.03200000.02680000.01164000.0957000.0545000.0519000.079000.00
Percentage of UnrecognizedTaxBenefits100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

prft:AdjustmentToAdditionalPaidInCapitalPurchaseOfWarrants us-gaap:DebtInstrument, us-gaap:StatementEquityComponents

prft:AdjustmentToAdditionalPaidInCapitalPurchaseOfWarrants

prft:ConvertibleSeniorNotesDue2023, us-gaap:AdditionalPaidInCapital


Adjustment
Period End2020-12-312020-09-30
Value83-40.699
Percentage of AdjustmentToAdditionalPaidInCapitalPurchaseOfWarrants100.0100.0

prft:AdjustmentsToAdditionalPaidInCapitalProceedsFromDerivativesRelatedToConvertibleDebt us-gaap:DebtInstrument, us-gaap:StatementEquityComponents

prft:AdjustmentsToAdditionalPaidInCapitalProceedsFromDerivativesRelatedToConvertibleDebt

prft:ConvertibleSeniorNotesDue2023, us-gaap:AdditionalPaidInCapital


Adjustments
Period End2020-12-312020-09-30
Value2.72447
Percentage of AdjustmentsToAdditionalPaidInCapitalProceedsFromDerivativesRelatedToConvertibleDebt100.0100.0

prft:AdjustmentstoAdditionalPaidinCapitalEquityComponentofConvertibleDebtNetofTax us-gaap:DebtInstrument, us-gaap:StatementEquityComponents

prft:AdjustmentstoAdditionalPaidinCapitalEquityComponentofConvertibleDebtNetofTax

prft:ConvertibleSeniorNotesDue2023, us-gaap:AdditionalPaidInCapital


Adjustmentsto
Period End2020-12-312020-09-30
Value-2.855-49.856
Percentage of AdjustmentstoAdditionalPaidinCapitalEquityComponentofConvertibleDebtNetofTax100.0100.0

prft:ConvertibleSeniorNotesDue2025, us-gaap:AdditionalPaidInCapital


Adjustmentsto
Period End2020-12-312020-09-30
Value0.036
Percentage of AdjustmentstoAdditionalPaidinCapitalEquityComponentofConvertibleDebtNetofTax-0.0-73.0

prft:AdjustmenttoAdditionalPaidinCapitalDebtIssuanceCostsAllocatedtoEquityNetofTax us-gaap:StatementEquityComponents

prft:AdjustmenttoAdditionalPaidinCapitalDebtIssuanceCostsAllocatedtoEquityNetofTax

us-gaap:AdditionalPaidInCapital


Adjustmentto
Period End2020-12-312020-09-302019-12-312019-09-302018-12-312018-09-30
Value8000.0-1155000.00012000.0-511000.0
Percentage of AdjustmenttoAdditionalPaidinCapitalDebtIssuanceCostsAllocatedtoEquityNetofTax100.0100.00.00.0100.0100.0

prft:AdjustmenttoAdditionalPaidinCapitalPurchaseofHedgesNetTax us-gaap:StatementEquityComponents

prft:AdjustmenttoAdditionalPaidinCapitalPurchaseofHedgesNetTax

us-gaap:AdditionalPaidInCapital


Adjustmentto
Period End2020-12-312020-09-302019-12-312019-09-302018-12-312018-09-30
Value0.0-36.3870.00.00.0-15.376
Percentage of AdjustmenttoAdditionalPaidinCapitalPurchaseofHedgesNetTax0.0100.00.00.00.0100.0

prft:BusinessAcquisitionProformaWeightedAverageSharesOutstandingBasic

prft:BusinessAcquisitionProformaWeightedAverageSharesOutstandingBasic


Business
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302011-12-312011-09-30
Value32-0.0070.03731310.004-0.0610.08631-0.306-0.1560.12333-0.011-0.2250.30633-0.1610.0870.23330.0640.1030.054330.0530.0540.493320.666-0.17-1.524320.2630.526-0.198-0.198
Percentage of BusinessAcquisitionProformaWeightedAverageSharesOutstandingBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

prft:BusinessAcquisitionProformaWeightedAverageSharesOutstandingDiluted

prft:BusinessAcquisitionProformaWeightedAverageSharesOutstandingDiluted


Business
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302011-12-312011-09-30
Value33-0.020.01332320.0390.016-0.22532-0.313-0.0380.18533-0.097-0.2010.29734-0.7170.120.587340.330.082-0.022340.018-0.0020.368320.449-0.182-1.17330.2380.0340.1260.026
Percentage of BusinessAcquisitionProformaWeightedAverageSharesOutstandingDiluted100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

prft:BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentGoodwill us-gaap:BusinessAcquisition

prft:BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentGoodwill

prft:PSL


Business
Period End2020-09-30
Value3200000.0
Percentage of BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentGoodwill100.0

prft:BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentLiabilities us-gaap:BusinessAcquisition

prft:BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentLiabilities

prft:PSL


Business
Period End2020-09-30
Value2000000.0
Percentage of BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentLiabilities100.0

prft:BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentTangibleAssets us-gaap:BusinessAcquisition

prft:BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentTangibleAssets

prft:PSL


Business
Period End2020-09-30
Value100000.0
Percentage of BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentTangibleAssets100.0

prft:ConvertibleNotesHedgesStockPriceTrigger us-gaap:DebtInstrument, us-gaap:LongtermDebtType

prft:ConvertibleNotesHedgesStockPriceTrigger

prft:ConvertibleSeniorNotesDue2025, prft:ConvertibleNoteHedges


Convertible
Period End2020-08-14
Value51.67
Percentage of ConvertibleNotesHedgesStockPriceTrigger100.0

prft:CostOfEnteringIntoHedgesNetOfWarrants us-gaap:DebtInstrument, us-gaap:LongtermDebtType

prft:CostOfEnteringIntoHedgesNetOfWarrants

prft:ConvertibleSeniorNotesDue2025, us-gaap:ConvertibleDebt


Cost
Period End2020-08-14
Value26
Percentage of CostOfEnteringIntoHedgesNetOfWarrants100.0

prft:Costofpurchaseofhedgesonconvertiblenotes us-gaap:DebtInstrument, us-gaap:LongtermDebtType

prft:Costofpurchaseofhedgesonconvertiblenotes

prft:ConvertibleSeniorNotesDue2025, prft:ConvertibleNoteHedges


Costofpurchaseofhedgesonconvertiblenotesus-gaap:
Period End2020-08-14
Value48
Percentage of Costofpurchaseofhedgesonconvertiblenotes100.0

prft:DebtInstrumentConvertibleOptiontoAcquireShares us-gaap:DebtInstrument, us-gaap:LongtermDebtType

prft:DebtInstrumentConvertibleOptiontoAcquireShares

prft:ConvertibleSeniorNotesDue2023, prft:ConvertibleNoteHedges


Debt
Period End2020-08-142018-09-11
Value300000.0100000.0
Percentage of DebtInstrumentConvertibleOptiontoAcquireShares100.0100.0

prft:ConvertibleSeniorNotesDue2025, prft:ConvertibleNoteHedges


Debt
Period End2020-08-14
Value4500000.0
Percentage of DebtInstrumentConvertibleOptiontoAcquireShares1500.0

prft:IncrementalCommonSharesAttributableToRestrictedStockSubjectToVesting

prft:IncrementalCommonSharesAttributableToRestrictedStockSubjectToVesting


Incremental
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-30
Value460000.0448000.03000.0444000.0265000.0529000.036000.0694000.0495000.0542000.07000.0733000.0552000.0491000.038000.0459000.0262000.0402000.0479000.0373000.0363000.0368000.0354000.0504000.0528000.0485000.0699000.040000.0773000.0592000.0536000.02000.0662000.0604000.0592000.0-14000.0548000.0601000.0
Percentage of IncrementalCommonSharesAttributableToRestrictedStockSubjectToVesting100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

prft:InterestIncomeExpenseNonoperatingNetIncludingAmortizationofDebtDiscountandDeferredIssuanceCosts

prft:InterestIncomeExpenseNonoperatingNetIncludingAmortizationofDebtDiscountandDeferredIssuanceCosts


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-09-30
Value-3367000.0-3296000.0-3333000.0-2808000.0-2061000.0-1926000.0-1867000.0-1895000.0-1863000.0-1793000.0-1842000.0-831000.0-513000.0-374000.0-440000.0
Percentage of InterestIncomeExpenseNonoperatingNetIncludingAmortizationofDebtDiscountandDeferredIssuanceCosts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

prft:LineOfCreditFacilityAllowableAmountForIssuanceOfLettersOfCredit us-gaap:CreditFacility, us-gaap:DebtInstrument

prft:LineOfCreditFacilityAllowableAmountForIssuanceOfLettersOfCredit

us-gaap:RevolvingCreditFacility, prft:CreditAgreement


Line
Period End2021-06-302021-03-312020-12-31
Value010000000.00
Percentage of LineOfCreditFacilityAllowableAmountForIssuanceOfLettersOfCredit0.0100.00.0

prft:PaymentsForRepurchaseOfConvertibleDebt

prft:PaymentsForRepurchaseOfConvertibleDebt


Payments
Period End2020-12-31
Value9.7
Percentage of PaymentsForRepurchaseOfConvertibleDebt100.0

prft:PaymentsForRepurchaseOfConvertibleDebt us-gaap:DebtInstrument, us-gaap:LongtermDebtType

prft:ConvertibleSeniorNotesDue2023, prft:ConvertibleDebtEquityComponent


Payments
Period End2020-12-312020-09-30
Value5249
Percentage of PaymentsForRepurchaseOfConvertibleDebt543.30.0

prft:ConvertibleSeniorNotesDue2023, prft:ConvertibleDebtLiabilityComponent


Payments
Period End2020-12-312020-09-30
Value127120
Percentage of PaymentsForRepurchaseOfConvertibleDebt1316.50.0

prft:ConvertibleSeniorNotesDue2023, us-gaap:ConvertibleDebt


Payments
Period End2020-12-312020-08-312020-09-30
Value9.7172172
Percentage of PaymentsForRepurchaseOfConvertibleDebt100.00.00.0

prft:ConvertibleSeniorNotesDue2025, us-gaap:ConvertibleDebt


Payments
Period End2020-08-14
Value172
Percentage of PaymentsForRepurchaseOfConvertibleDebt0.0

prft:PaymentsForSoftwareDevelopmentCosts

prft:PaymentsForSoftwareDevelopmentCosts


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-31
Value221000.0348000.0220000.0165000.0583000.0497000.0307000.0344000.0388000.0135000.087000.0187000.0204000.086000.0199000.0177000.0223000.0362000.0203000.0530000.0569000.0662000.0216000.0
Percentage of PaymentsForSoftwareDevelopmentCosts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

prft:PaymentsForWarrantsRelatedToConvertibleNotes

prft:PaymentsForWarrantsRelatedToConvertibleNotes


Payments
Period End2020-12-31
Value2.329
Percentage of PaymentsForWarrantsRelatedToConvertibleNotes100.0

prft:PaymentsForWarrantsRelatedToConvertibleNotes us-gaap:DebtInstrument, us-gaap:LongtermDebtType, us-gaap:StatementEquityComponents

prft:ConvertibleSeniorNotesDue2023, us-gaap:ConvertibleDebt, us-gaap:Warrant


Payments
Period End2020-08-31
Value40
Percentage of PaymentsForWarrantsRelatedToConvertibleNotes0.0

prft:ProceedsFromSaleOfDerivativesRelatedToConvertibleNotes

prft:ProceedsFromSaleOfDerivativesRelatedToConvertibleNotes


Proceeds
Period End2020-12-31
Value2.724
Percentage of ProceedsFromSaleOfDerivativesRelatedToConvertibleNotes100.0

prft:ProceedsFromSaleOfDerivativesRelatedToConvertibleNotes us-gaap:DebtInstrument, us-gaap:LongtermDebtType

prft:ConvertibleSeniorNotesDue2023, prft:ConvertibleNoteHedges


Proceeds
Period End2020-08-31
Value47
Percentage of ProceedsFromSaleOfDerivativesRelatedToConvertibleNotes0.0

prft:ProceedsFromTheSaleOfStockThroughTheEmployeeStockPurchasePlan

prft:ProceedsFromTheSaleOfStockThroughTheEmployeeStockPurchasePlan


Proceeds
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value106000.0105000.0100000.094000.076000.040000.048000.045000.041000.044000.043000.043000.042000.039000.0044000.044000.047000.043000.049000.0
Percentage of ProceedsFromTheSaleOfStockThroughTheEmployeeStockPurchasePlan100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0

prft:RemittanceOfTaxesWithheldAsPartOfNetShareSettlementOfRestrictedStockVesting

prft:RemittanceOfTaxesWithheldAsPartOfNetShareSettlementOfRestrictedStockVesting


Remittance
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value-9000.0-5234000.0-3167000.00-26000.0-4835000.0-3354000.0-17000.0-40000.0-3925000.0-2153000.0-13000.0-34000.0-2861000.0-1654000.0-55000.0-192000.0-2295000.0-1193000.0-103000.0-76000.0-2351000.0-1360000.0-213000.0-1121000.0-2310000.0-1445000.0-328000.0-3108000.0-1719000.0-2321000.0-754000.0-892000.0-320000.0-1275000.0-49000.0-321000.0-212000.0
Percentage of RemittanceOfTaxesWithheldAsPartOfNetShareSettlementOfRestrictedStockVesting100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

prft:StockCompensationRelatedToRestrictedStockVestingAndRetirementSavingsPlanContributionsShares

prft:StockCompensationRelatedToRestrictedStockVestingAndRetirementSavingsPlanContributionsShares


Stock
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-30
Value18000.0254000.022000.038000.0320000.025000.0
Percentage of StockCompensationRelatedToRestrictedStockVestingAndRetirementSavingsPlanContributionsShares100.0100.0100.0100.0100.0100.0

prft:StockCompensationRelatedToRestrictedStockVestingAndRetirementSavingsPlanContributionsShares us-gaap:StatementEquityComponents

us-gaap:CommonStock


Stock
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
Value298000.022000.038000.0320000.0344000.025000.034000.0380000.0364000.029000.036000.0356000.0
Percentage of StockCompensationRelatedToRestrictedStockVestingAndRetirementSavingsPlanContributionsShares0.0100.0100.0100.00.0100.00.00.00.00.00.00.0

us-gaap:AdjustmentsToAdditionalPaidInCapitalEquityComponentOfConvertibleDebt us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:AdjustmentsToAdditionalPaidInCapitalEquityComponentOfConvertibleDebt

prft:ConvertibleSeniorNotesDue2025, us-gaap:ConvertibleDebt


Adjustments
Period End2020-08-14
Value48
Percentage of AdjustmentsToAdditionalPaidInCapitalEquityComponentOfConvertibleDebt100.0

us-gaap:AdjustmentsToAdditionalPaidInCapitalWarrantIssued us-gaap:DebtInstrument, us-gaap:LongtermDebtType, us-gaap:StatementEquityComponents

us-gaap:AdjustmentsToAdditionalPaidInCapitalWarrantIssued

prft:ConvertibleSeniorNotesDue2025, us-gaap:ConvertibleDebt, us-gaap:Warrant


Adjustments
Period End2020-08-14
Value22
Percentage of AdjustmentsToAdditionalPaidInCapitalWarrantIssued100.0

us-gaap:AdjustmentsToAdditionalPaidInCapitalWarrantIssued us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Adjustments
Period End2020-12-312020-09-302019-12-312019-09-302018-12-312018-09-30
Value0.0220.00.00.012
Percentage of AdjustmentsToAdditionalPaidInCapitalWarrantIssued0.00.00.00.00.00.0

us-gaap:AllowanceForDoubtfulAccountsReceivableWriteOffs

us-gaap:AllowanceForDoubtfulAccountsReceivableWriteOffs


Allowance
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value-5000.065000.0-141000.0690000.034000.094000.0
Percentage of AllowanceForDoubtfulAccountsReceivableWriteOffs100.0100.0100.0100.0100.0100.0

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

us-gaap:AmortizationOfDebtDiscountPremium

prft:ConvertibleSeniorNotesDue2023, us-gaap:SeniorNotes


Amortization
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value37000.037000.057000.0535000.0992000.0977000.0963000.0950000.0937000.0923000.0911000.0200000.0
Percentage of AmortizationOfDebtDiscountPremium100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

prft:ConvertibleSeniorNotesDue2025, us-gaap:SeniorNotes


Amortization
Period End2021-06-302021-03-312020-12-312020-09-30
Value2200000.02179000.02138000.01116000.0
Percentage of AmortizationOfDebtDiscountPremium5945.95889.23750.9208.6

us-gaap:AmortizationOfFinancingCostsAndDiscounts

us-gaap:AmortizationOfFinancingCostsAndDiscounts


Amortization
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value2562000.02528000.02510000.01929000.01215000.01201000.01187000.01173000.01160000.01147000.01135000.0265000.018000.017000.018000.0
Percentage of AmortizationOfFinancingCostsAndDiscounts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:BusinessAcquisitionProFormaEarningsPerShareBasic

us-gaap:BusinessAcquisitionProFormaEarningsPerShareBasic


Business
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302011-12-312011-09-30
Value0.470.380.230.610.30.40.320.340.170.250.220.230.180.270.210.130.10.10.180.180.150.260.240.130.130.220.250.230.140.210.250.220.120.170.190.110.13
Percentage of BusinessAcquisitionProFormaEarningsPerShareBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:BusinessAcquisitionProFormaEarningsPerShareDiluted

us-gaap:BusinessAcquisitionProFormaEarningsPerShareDiluted


Business
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302011-12-312011-09-30
Value0.460.370.220.60.290.390.310.330.170.250.210.220.180.270.210.120.10.110.170.170.150.250.250.120.130.220.250.230.130.210.240.210.120.160.190.10.12
Percentage of BusinessAcquisitionProFormaEarningsPerShareDiluted100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:BusinessAcquisitionsProFormaNetIncomeLoss

us-gaap:BusinessAcquisitionsProFormaNetIncomeLoss


Business
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302011-12-312011-09-30
Value15127.367199.6051210105.4788.1037.3027.5625.9829.1837.0284.423.2683.4515.9296.335.1068.8228.414.2994.3677.2468.1717.7424.3856.9627.5476.543.9925.1595.9623.093.691
Percentage of BusinessAcquisitionsProFormaNetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:BusinessAcquisitionsProFormaRevenue

us-gaap:BusinessAcquisitionsProFormaRevenue


Business
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302011-12-312011-09-30
Value16916215716014814514413714313612812612013312313211195129140127147129108110125116124100108968710383938286
Percentage of BusinessAcquisitionsProFormaRevenue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:BusinessCombinationAcquisitionRelatedCosts

us-gaap:BusinessCombinationAcquisitionRelatedCosts


Business
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value068000.018000.057000.01787000.01813000.0301000.017000.0616000.0-38000.0535000.0497000.0542000.0298000.076000.0-100000.0893000.0490000.0537000.0310000.0162000.0243000.0726000.0488000.021000.00951000.0-74000.01076000.01493000.0854000.029000.01439000.0-25000.040000.09000.01121000.0701000.018000.01000.0727000.0503000.0587000.000
Percentage of BusinessCombinationAcquisitionRelatedCosts0.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.0

us-gaap:BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuable

us-gaap:BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuable


Business
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value0.00.04.494.2390.00.01.2940.01.3451.1232.6660.00.00.07.1432.2860.00.00.0960.0
Percentage of BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuable0.00.0100.0100.00.00.0100.00.0100.0100.0100.00.00.00.0100.0100.00.00.0100.00.0

us-gaap:BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1

us-gaap:BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1


Business
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
Value-510000.0514000.05726000.02061000.02067000.0-335000.0611000.0-2000.0116000.0-424000.059000.0666000.0121000.0969000.04063000.0-389000.0-597000.0158000.0138000.0-865000.0-1189000.0238000.0172000.099000.089000.085000.0
Percentage of BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1 us-gaap:BusinessAcquisition

prft:Brainjocks


Business
Period End2021-06-302021-03-31
Value100000.0300000.0
Percentage of BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1-19.658.4

prft:MedTouch


Business
Period End2021-06-302021-03-312020-12-312020-09-302020-06-30
Value200000.0100000.0700000.02000000.02000000.0
Percentage of BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1-39.219.512.297.096.8

prft:PSL


Business
Period End2021-06-30
Value-700000.0
Percentage of BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1137.3

prft:SundogInteractive


Business
Period End2020-09-302020-06-302020-03-312019-12-31
Value00400000.0600000.0
Percentage of BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability10.00.0-119.498.2

us-gaap:BusinessCombinationProFormaInformationEarningsOrLossOfAcquireeSinceAcquisitionDateActual

us-gaap:BusinessCombinationProFormaInformationEarningsOrLossOfAcquireeSinceAcquisitionDateActual


Business
Period End2020-12-31
Value-877000.0
Percentage of BusinessCombinationProFormaInformationEarningsOrLossOfAcquireeSinceAcquisitionDateActual100.0

us-gaap:BusinessCombinationProFormaInformationRevenueOfAcquireeSinceAcquisitionDateActual

us-gaap:BusinessCombinationProFormaInformationRevenueOfAcquireeSinceAcquisitionDateActual


Business
Period End2020-12-31
Value16
Percentage of BusinessCombinationProFormaInformationRevenueOfAcquireeSinceAcquisitionDateActual100.0

us-gaap:BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentConsiderationTransferred us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentConsiderationTransferred

prft:PSL


Business
Period End2020-09-30
Value0.6
Percentage of BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentConsiderationTransferred100.0

us-gaap:BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentIntangibles us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentIntangibles

prft:PSL


Business
Period End2020-09-30
Value-700000.0
Percentage of BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentIntangibles100.0

us-gaap:CapitalExpendituresIncurredButNotYetPaid

us-gaap:CapitalExpendituresIncurredButNotYetPaid


Capital
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-312017-09-302016-12-312016-09-302015-12-312015-09-30
Value3000.014000.0179000.0307000.0-540000.0113000.02278000.0000000-835000.000
Percentage of CapitalExpendituresIncurredButNotYetPaid100.0100.0100.0100.0100.0100.0100.00.00.00.00.00.00.0100.00.00.0

us-gaap:ContractWithCustomerLiabilityRevenueRecognized us-gaap:AdjustmentsForNewAccountingPronouncements, us-gaap:InitialApplicationPeriodCumulativeEffectTransition

us-gaap:ContractWithCustomerLiabilityRevenueRecognized

us-gaap:AccountingStandardsUpdate201409, us-gaap:DifferenceBetweenRevenueGuidanceInEffectBeforeAndAfterTopic606


Contract
Period End2021-03-31
Value7600000.0
Percentage of ContractWithCustomerLiabilityRevenueRecognized100.0

us-gaap:Depreciation

us-gaap:Depreciation


Depreciation
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-30
Value1615000.01460000.01437000.01388000.01317000.01288000.01266000.01095000.01070000.01016000.01015000.0995000.01028000.01034000.01135000.01123000.01205000.01259000.01248000.01212000.01214000.01192000.01174000.01148000.01093000.01081000.01021000.0932000.0870000.0912000.0928000.0932000.0719000.0683000.0661000.0612000.0515000.0463000.0547000.0484000.0398000.0325000.0263000.0225000.0195000.0
Percentage of Depreciation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

us-gaap:EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents


Effect
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value-77000.0-442000.0857000.084000.0118000.0-453000.094000.0-117000.042000.0210000.0
Percentage of EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense

us-gaap:EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense


Employee
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-312011-09-302011-06-30
Value1600000.01600000.0-1800000.01500000.01500000.01500000.0900000.0800000.0900000.0900000.0900000.0800000.0800000.0800000.01200000.01100000.01100000.01200000.0800000.01200000.01200000.01100000.01000000.01100000.01000000.01100000.01000000.01000000.01100000.01000000.0900000.01000000.0900000.0800000.0900000.0800000.0700000.0900000.0800000.0800000.0
Percentage of EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FinitelivedIntangibleAssetsAcquired1

us-gaap:FinitelivedIntangibleAssetsAcquired1


Finitelived
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-312018-09-302017-12-312017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value440.3-0.830150.00.22.54.7-0.4204.9-17.00.00.020
Percentage of FinitelivedIntangibleAssetsAcquired1100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.00.00.0100.0

us-gaap:FinitelivedIntangibleAssetsAcquired1 us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:CustomerRelationships


Finitelived
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-312018-09-302017-12-312017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value330.0-1.221130.00.22.33.6-0.5174.5-15.90.00.018
Percentage of FinitelivedIntangibleAssetsAcquired173.80.0150.070.086.80.0100.092.076.6125.084.491.893.50.00.091.5

us-gaap:NoncompeteAgreements


Finitelived
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-312018-09-302017-12-312017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value0.20.0-0.10.20.10.00.00.10.00.00.70.20.10.00.00.1
Percentage of FinitelivedIntangibleAssetsAcquired10.40.012.50.70.70.00.04.00.0-0.03.44.1-0.60.00.00.5

us-gaap:OrderOrProductionBacklog


Finitelived
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-312018-09-302017-12-312017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value9.60.30.28.01.10.00.00.10.70.11.80.2-1.00.00.01.4
Percentage of FinitelivedIntangibleAssetsAcquired121.5100.0-25.026.77.20.00.04.014.9-25.08.84.15.90.00.07.0

us-gaap:SoftwareDevelopment


Finitelived
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-312017-12-312017-06-30
Value1.50.00.30.50.70.00.00.00.00.6
Percentage of FinitelivedIntangibleAssetsAcquired13.40.0-37.51.74.60.00.00.0-0.02.9

us-gaap:TradeNames


Finitelived
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-312018-09-302017-12-312017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value0.40.00.00.30.10.00.00.00.00.00.10.0-0.20.00.00.2
Percentage of FinitelivedIntangibleAssetsAcquired10.90.0-0.01.00.70.00.00.00.0-0.00.50.01.20.00.01.0

us-gaap:GoodwillForeignCurrencyTranslationGainLoss

us-gaap:GoodwillForeignCurrencyTranslationGainLoss


Goodwill
Period End2021-06-302021-03-312020-12-31
Value-1171000.0-4438000.07628000.0
Percentage of GoodwillForeignCurrencyTranslationGainLoss100.0100.0100.0

us-gaap:GoodwillPurchaseAccountingAdjustments

us-gaap:GoodwillPurchaseAccountingAdjustments


Goodwill
Period End2021-06-302021-03-312020-12-31
Value-0.248-1.5631.271
Percentage of GoodwillPurchaseAccountingAdjustments100.0100.0100.0

us-gaap:IncreaseDecreaseInAccountsAndNotesReceivable

us-gaap:IncreaseDecreaseInAccountsAndNotesReceivable


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value105.653-4.85510-5.978-7.6562.7943.5554.346-7.293110.143-4.905-6.6914.4187.2388.007-16.66-4.028-2.852-6.298-3.7274.31813-1.842-19.815-3.66315113.439-6.813-2.446.0491.742-8.3431.3586.0271.776-1.7231.3397.6320.3391.6031.021
Percentage of IncreaseDecreaseInAccountsAndNotesReceivable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInOtherOperatingAssets

us-gaap:IncreaseDecreaseInOtherOperatingAssets


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value2306000.03065000.0-742000.01087000.0-1687000.0-479000.0971000.0-1274000.02522000.05458000.03559000.0265000.0-96000.0-1326000.04531000.0145000.0-4342000.01441000.03981000.0-137000.0-2333000.0-1044000.02813000.0-3545000.0967000.0213000.0-1224000.0-2745000.0-860000.0-391000.01658000.0593000.0-3987000.01862000.0436000.04000.0-872000.0-642000.0-2059000.01256000.0448000.0675000.0-1038000.0301000.0
Percentage of IncreaseDecreaseInOtherOperatingAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInOtherOperatingLiabilities

us-gaap:IncreaseDecreaseInOtherOperatingLiabilities


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value1.359-12.992147.70514-26.20111-3.2259.46-9.5488.5041.2382.251-7.3548.84-1.4032.192-6.1752.423-3.2611.349-8.6533.716-2.5160.377-11.627.153-5.105-1.478-9.7122.935-0.0825.079-5.0311.292-0.3475.184-3.9820.561-1.5113.744-7.344-1.123-0.609
Percentage of IncreaseDecreaseInOtherOperatingLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncrementalCommonSharesAttributableToCallOptionsAndWarrants

us-gaap:IncrementalCommonSharesAttributableToCallOptionsAndWarrants


Incremental
Period End2021-06-302021-03-312011-12-312011-09-302011-06-30
Value46000.024000.0-2000.06000.07000.0
Percentage of IncrementalCommonSharesAttributableToCallOptionsAndWarrants100.0100.0100.0100.0100.0

us-gaap:IncrementalCommonSharesAttributableToConversionOfDebtSecurities

us-gaap:IncrementalCommonSharesAttributableToConversionOfDebtSecurities


Incremental
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value1251000.0433000.0-5000.022000.00529000.0
Percentage of IncrementalCommonSharesAttributableToConversionOfDebtSecurities100.0100.0100.0100.00.0100.0

us-gaap:IncrementalCommonSharesAttributableToEquityUnitPurchaseAgreements

us-gaap:IncrementalCommonSharesAttributableToEquityUnitPurchaseAgreements


Incremental
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-30
Value188000.0246000.016000.0310000.0224000.0181000.0-13000.0219000.0202000.0296000.0-42000.0264000.0565000.0547000.0-76000.0859000.0543000.0509000.0-19000.0470000.0476000.0561000.0-13000.0321000.0451000.0612000.0-107000.0661000.01088000.01069000.073000.0740000.0598000.0509000.010000.0697000.0655000.0582000.048000.0525000.0263000.0
Percentage of IncrementalCommonSharesAttributableToEquityUnitPurchaseAgreements100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestExpenseDebtExcludingAmortization us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:InterestExpenseDebtExcludingAmortization

prft:ConvertibleSeniorNotesDue2023, us-gaap:SeniorNotes


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value30000.030000.047000.0446000.0853000.0854000.0853000.0854000.0853000.0854000.0853000.0190000.0
Percentage of InterestExpenseDebtExcludingAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

prft:ConvertibleSeniorNotesDue2025, us-gaap:SeniorNotes


Interest
Period End2021-06-302021-03-312020-12-312020-09-30
Value719000.0719000.0719000.0375000.0
Percentage of InterestExpenseDebtExcludingAmortization2396.72396.71529.884.1

us-gaap:OperatingLeaseExpense

us-gaap:OperatingLeaseExpense


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value3.33.33.23.32.92.82.72.62.52.1
Percentage of OperatingLeaseExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentForContingentConsiderationLiabilityFinancingActivities

us-gaap:PaymentForContingentConsiderationLiabilityFinancingActivities


Payment
Period End2020-12-312020-09-302019-12-312019-09-302018-12-31
Value1944000.0004281000.04038000.0
Percentage of PaymentForContingentConsiderationLiabilityFinancingActivities100.00.00.0100.0100.0

us-gaap:PaymentForContingentConsiderationLiabilityFinancingActivities us-gaap:BusinessAcquisition

prft:SundogInteractive


Payment
Period End2020-12-31
Value2500000.0
Percentage of PaymentForContingentConsiderationLiabilityFinancingActivities128.6

us-gaap:PaymentsForRepurchaseOfEquity

us-gaap:PaymentsForRepurchaseOfEquity


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value6.8944.9088.461110.00.00.8353.5174.8251112418.1022.138.6483.041128.122180.00.00.00.00.01.4731.3674.5070.02.5850.610.6783.1538.6091.3545.5130.0530.1660.3862.2663.7123.4442.369
Percentage of PaymentsForRepurchaseOfEquity100.0100.0100.0100.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.00.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsOfDebtIssuanceCosts

us-gaap:PaymentsOfDebtIssuanceCosts


Payments
Period End2020-12-312019-12-312018-12-312018-09-302017-12-312017-09-30
Value-50000.00509000.04323000.0355000.0-355000.0
Percentage of PaymentsOfDebtIssuanceCosts100.00.0100.0100.0100.0100.0

us-gaap:PaymentsOfFinancingCosts us-gaap:CreditFacility, us-gaap:DebtInstrument

us-gaap:PaymentsOfFinancingCosts

us-gaap:RevolvingCreditFacility, prft:CreditAgreement


Payments
Period End2021-06-30
Value600000.0
Percentage of PaymentsOfFinancingCosts100.0

us-gaap:PaymentsToAcquireBusinessesNetOfCashAcquired

us-gaap:PaymentsToAcquireBusinessesNetOfCashAcquired


Payments
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value1.693-1.01161290.00.48100.3525.4279.935110.00.00.0307.1447.1870.00.00.277113.0251.2422-0.0870.2941926180.0190.4770.1481011140.365126.4710.2893.1560.285
Percentage of PaymentsToAcquireBusinessesNetOfCashAcquired100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.00.00.00.0100.0100.0100.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PensionAndOtherPostretirementBenefitExpense

us-gaap:PensionAndOtherPostretirementBenefitExpense


Pension
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-312011-09-302011-06-30
Value1100000.0900000.0900000.0800000.0900000.0800000.01000000.0700000.0800000.0700000.0600000.0700000.0700000.0700000.0600000.0600000.0600000.0600000.0500000.0600000.0600000.0700000.0500000.0600000.0500000.0600000.0400000.0600000.0500000.0500000.0500000.0400000.0400000.0400000.0300000.0400000.0300000.0300000.0300000.0300000.0
Percentage of PensionAndOtherPostretirementBenefitExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromDebtNetOfIssuanceCosts us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:ProceedsFromDebtNetOfIssuanceCosts

prft:ConvertibleSeniorNotesDue2025, us-gaap:ConvertibleDebt


Proceeds
Period End2020-08-14
Value222
Percentage of ProceedsFromDebtNetOfIssuanceCosts100.0

us-gaap:ProceedsFromLinesOfCredit

us-gaap:ProceedsFromLinesOfCredit


Proceeds
Period End2020-12-312020-09-302019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-03-31
Value0.08.00.00.00.00.00.04360575169886655494559656453845462777053505621184841260.00.0
Percentage of ProceedsFromLinesOfCredit0.0100.00.00.00.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.0

us-gaap:ProceedsFromNotesPayable us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:ProceedsFromNotesPayable

prft:ConvertibleSeniorNotesDue2025, us-gaap:ConvertibleDebt


Proceeds
Period End2020-08-14
Value24
Percentage of ProceedsFromNotesPayable100.0

us-gaap:ProvisionForDoubtfulAccounts

us-gaap:ProvisionForDoubtfulAccounts


Provision
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value682000.0-10000.0-283000.0182000.0126000.0830000.0
Percentage of ProvisionForDoubtfulAccounts100.0100.0100.0100.0100.0100.0

us-gaap:RepaymentsOfLongTermLinesOfCredit

us-gaap:RepaymentsOfLongTermLinesOfCredit


Repayments
Period End2020-12-312020-09-302019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-03-31
Value0.0200.00.00.00.00.09960566172585951576559706360707558563950544118274935190.00.0
Percentage of RepaymentsOfLongTermLinesOfCredit0.0100.00.00.00.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod us-gaap:AwardType, us-gaap:PlanName

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod

us-gaap:RestrictedStock, prft:LongTermIncentivePlan2012


Share
Period End2021-06-302021-03-312020-12-312016-09-30
Value26000.018000.07000.049000.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod100.0100.0100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue us-gaap:AwardType, us-gaap:PlanName

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue

us-gaap:RestrictedStock, prft:LongTermIncentivePlan2012


Share
Period End2021-06-302021-03-312020-12-31
Value0.0335.870.07
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue100.0100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue us-gaap:AwardType, us-gaap:PlanName

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue

us-gaap:RestrictedStock, prft:LongTermIncentivePlan2012


Share
Period End2021-06-302021-03-312020-12-31
Value055.7-2.87
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue0.0100.0100.0

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

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod

us-gaap:RestrictedStock, prft:LongTermIncentivePlan2012


Share
Period End2021-06-302021-03-312020-12-31
Value2000.0236000.0281000.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod100.0100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue us-gaap:AwardType, us-gaap:PlanName

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue

us-gaap:RestrictedStock, prft:LongTermIncentivePlan2012


Share
Period End2021-06-302021-03-312020-12-31
Value0.0729.831.59
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue100.0100.0100.0

us-gaap:StockIssuedDuringPeriodSharesAcquisitions us-gaap:StatementEquityComponents

us-gaap:StockIssuedDuringPeriodSharesAcquisitions

us-gaap:CommonStock


Stock
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value00170000.0167000.00054000.0065000.048000.0153000.0
Percentage of StockIssuedDuringPeriodSharesAcquisitions0.00.0100.0100.00.00.0100.00.0100.0100.0100.0

us-gaap:StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans

us-gaap:StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans


Stock
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-30
Value2000.02000.03000.03000.01000.01000.0
Percentage of StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans100.0100.0100.0100.0100.0100.0

us-gaap:StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans us-gaap:StatementEquityComponents

us-gaap:CommonStock


Stock
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
Value2000.03000.03000.01000.01000.01000.02000.02000.01000.02000.02000.02000.0
Percentage of StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans0.0100.0100.0100.00.0100.00.00.00.00.00.00.0

us-gaap:StockIssuedDuringPeriodValueAcquisitions us-gaap:StatementEquityComponents

us-gaap:StockIssuedDuringPeriodValueAcquisitions

us-gaap:AdditionalPaidInCapital


Stock
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302012-12-312012-09-302012-06-302012-03-312011-12-312011-09-30
Value0.00.0235.2694.8920.00.01.4560.01.5381.1923.0090.00.067.9712.550.00.02.8671.0810.0110.00.735.948132.4830.01.133.1596.2696.1422.9454.079
Percentage of StockIssuedDuringPeriodValueAcquisitions0.0100.0100.0100.00.00.0100.00.0100.0100.0100.00.0100.0100.0100.00.00.0100.0100.00.0100.00.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0

us-gaap:StockIssuedDuringPeriodValueEmployeeStockPurchasePlan us-gaap:StatementEquityComponents

us-gaap:StockIssuedDuringPeriodValueEmployeeStockPurchasePlan

us-gaap:AdditionalPaidInCapital


Stock
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value106000.0105000.0100000.094000.076000.040000.048000.045000.041000.044000.043000.043000.042000.039000.0044000.044000.047000.0
Percentage of StockIssuedDuringPeriodValueEmployeeStockPurchasePlan100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0

us-gaap:TreasuryStockSharesAcquired

us-gaap:TreasuryStockSharesAcquired


Treasury
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-30
Value100000.0179000.0255000.00114000.0102000.0
Percentage of TreasuryStockSharesAcquired100.0100.0100.00.0100.0100.0

us-gaap:TreasuryStockSharesAcquired us-gaap:StatementEquityComponents

us-gaap:CommonStock


Treasury
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
Value268000.0255000.00114000.0108000.0102000.0163000.0554000.0580000.01386000.0337000.0220000.0
Percentage of TreasuryStockSharesAcquired0.0100.00.0100.00.0100.00.00.00.00.00.00.0

us-gaap:TreasuryStockValueAcquiredCostMethod us-gaap:StatementEquityComponents

us-gaap:TreasuryStockValueAcquiredCostMethod

us-gaap:TreasuryStock


Treasury
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-30
Value6.9031011110.0264.8354.1893.5344.8651514418.1364.991103.0961210190.1030.0762.3511.360.2132.5943.6775.9520.3285.6932.3293.907
Percentage of TreasuryStockValueAcquiredCostMethod100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:WeightedAverageNumberOfSharesIssuedBasic

us-gaap:WeightedAverageNumberOfSharesIssuedBasic


Weighted
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value3131-0.0073131310.023313131-0.3093232320.019323233-0.0173433
Percentage of WeightedAverageNumberOfSharesIssuedBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

dei:EntityCommonStockSharesOutstanding

dei:EntityCommonStockSharesOutstanding


Entity
Period End2021-07-222021-04-222021-02-162020-10-22
Value32333333
Percentage of EntityCommonStockSharesOutstanding100.0100.0100.0100.0

prft:AccruedMedicalClaimsExpense

prft:AccruedMedicalClaimsExpense


Accrued
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-31
Value2376000.02162000.02405000.02225000.01766000.01568000.01905000.01577000.01996000.01621000.01431000.02072000.01925000.02020000.02133000.01924000.01883000.01880000.01859000.01871000.01727000.01692000.01816000.01767000.01581000.01376000.01615000.01480000.01450000.01625000.01296000.01262000.01153000.01207000.01145000.01122000.01026000.0902000.0
Percentage of AccruedMedicalClaimsExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

prft:AccruedSubcontractorFees

prft:AccruedSubcontractorFees


Accrued
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-31
Value164000.0180000.0324000.0332000.0503000.0608000.0662000.0563000.0265000.0335000.0450000.0469000.0543000.0612000.0505000.01049000.01012000.0872000.0543000.0771000.01407000.0690000.0865000.0871000.02919000.03672000.03222000.02551000.02344000.02269000.02055000.02294000.02218000.02202000.02392000.0
Percentage of AccruedSubcontractorFees100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

prft:AccruedVariableCompensation

prft:AccruedVariableCompensation


Accrued
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-31
Value199.9322721188.377272019112212129.299169.159106.091108.056107.826159.0919.4656.467158.44116.857139.936106.1368.4957.9638.1596.998
Percentage of AccruedVariableCompensation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

prft:CompanyOwnedLifeInsurance us-gaap:FairValueByFairValueHierarchyLevel

prft:CompanyOwnedLifeInsurance

us-gaap:FairValueInputsLevel2


Company
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value9800000.07700000.07400000.06600000.06200000.05300000.05600000.0
Percentage of CompanyOwnedLifeInsurance100.0100.0100.0100.0100.0100.0100.0

prft:DeferredEmployerFICAPayments

prft:DeferredEmployerFICAPayments


Deferred
Period End2020-12-312020-09-30
Value5523000.08108000.0
Percentage of DeferredEmployerFICAPayments100.0100.0

prft:DeferredEmployerFICAPaymentsCurrent

prft:DeferredEmployerFICAPaymentsCurrent


Deferred
Period End2021-06-302021-03-312020-12-31
Value115.5195.523
Percentage of DeferredEmployerFICAPaymentsCurrent100.0100.0100.0

prft:DeferredEmployerFICAPaymentsNonCurrent

prft:DeferredEmployerFICAPaymentsNonCurrent


Deferred
Period End2020-12-31
Value5523000.0
Percentage of DeferredEmployerFICAPaymentsNonCurrent100.0

prft:DeferredEmployerFICAPaymentsNoncurrent

prft:DeferredEmployerFICAPaymentsNoncurrent


Deferred
Period End2021-03-312020-12-31
Value5519000.05523000.0
Percentage of DeferredEmployerFICAPaymentsNoncurrent100.0100.0

prft:DeferredFinanceCostsAttributabletoLiabilityComponent us-gaap:DebtInstrument, us-gaap:LongtermDebtType

prft:DeferredFinanceCostsAttributabletoLiabilityComponent

prft:ConvertibleSeniorNotesDue2025, us-gaap:ConvertibleDebt


Deferred
Period End2020-08-14
Value5700000.0
Percentage of DeferredFinanceCostsAttributabletoLiabilityComponent100.0

prft:DeferredFinanceCostsEquityComponent us-gaap:DebtInstrument, us-gaap:LongtermDebtType

prft:DeferredFinanceCostsEquityComponent

prft:ConvertibleSeniorNotesDue2025, us-gaap:ConvertibleDebt


Deferred
Period End2020-08-14
Value1600000.0
Percentage of DeferredFinanceCostsEquityComponent100.0

prft:DeferredTaxAssetEquityComponentDeferredFinanceCosts us-gaap:DebtInstrument, us-gaap:LongtermDebtType

prft:DeferredTaxAssetEquityComponentDeferredFinanceCosts

prft:ConvertibleSeniorNotesDue2025, us-gaap:ConvertibleDebt


Deferred
Period End2020-08-14
Value400000.0
Percentage of DeferredTaxAssetEquityComponentDeferredFinanceCosts100.0

prft:DeferredTaxAssetHedgesonConvertibleDebt us-gaap:DebtInstrument, us-gaap:LongtermDebtType

prft:DeferredTaxAssetHedgesonConvertibleDebt

prft:ConvertibleSeniorNotesDue2025, prft:ConvertibleNoteHedges


Deferred
Period End2020-08-14
Value12
Percentage of DeferredTaxAssetHedgesonConvertibleDebt100.0

prft:DeferredTaxAssetOperatingLeaseLiability

prft:DeferredTaxAssetOperatingLeaseLiability


Deferred
Period End2020-12-312019-12-312018-12-31
Value7195000.05060000.00
Percentage of DeferredTaxAssetOperatingLeaseLiability100.0100.00.0

prft:DeferredTaxLiabilitiesExcessTaxBenefitsFromShareBasedCompensation

prft:DeferredTaxLiabilitiesExcessTaxBenefitsFromShareBasedCompensation


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value10000.020000.0711000.01366000.03096000.0
Percentage of DeferredTaxLiabilitiesExcessTaxBenefitsFromShareBasedCompensation100.0100.0100.0100.0100.0

prft:DeferredTaxLiabilityConvertibleDebtDiscount us-gaap:DebtInstrument, us-gaap:LongtermDebtType

prft:DeferredTaxLiabilityConvertibleDebtDiscount

prft:ConvertibleSeniorNotesDue2025, us-gaap:ConvertibleDebt


Deferred
Period End2020-08-14
Value12
Percentage of DeferredTaxLiabilityConvertibleDebtDiscount100.0

prft:DeferredTaxLiabilityOperatingLeaseROU

prft:DeferredTaxLiabilityOperatingLeaseROU


Deferred
Period End2020-12-312019-12-312018-12-31
Value6909000.04798000.00
Percentage of DeferredTaxLiabilityOperatingLeaseROU100.0100.00.0

prft:LineOfCreditFacilityAdditionalCommitmentIncrease us-gaap:CreditFacility, us-gaap:DebtInstrument

prft:LineOfCreditFacilityAdditionalCommitmentIncrease

us-gaap:RevolvingCreditFacility, prft:CreditAgreement


Line
Period End2021-06-302021-03-312020-12-312020-09-302017-03-312016-12-31
Value757575752525
Percentage of LineOfCreditFacilityAdditionalCommitmentIncrease100.0100.0100.0100.0100.0100.0

prft:PayrollRelatedCosts

prft:PayrollRelatedCosts


Payroll
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-31
Value6759000.05923000.05738000.05883000.05654000.03031000.03716000.03528000.03429000.03191000.03064000.03378000.03352000.03035000.02971000.03188000.03071000.02665000.02607000.02746000.02736000.02835000.02906000.02057000.01898000.01730000.01614000.02803000.02342000.01588000.02035000.03080000.02682000.01642000.02544000.0
Percentage of PayrollRelatedCosts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

prft:ProfessionalFeesLiability

prft:ProfessionalFeesLiability


Professional
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
Value885000.0780000.0736000.01032000.02506000.01815000.01758000.01441000.01667000.01314000.01782000.01106000.0582000.0964000.0357000.0332000.0774000.0424000.0420000.0146000.0159000.0381000.0726000.01394000.0
Percentage of ProfessionalFeesLiability100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

prft:ResearchTaxCredits us-gaap:IncomeTaxAuthority, us-gaap:IncomeTaxAuthorityName, us-gaap:TaxPeriod

prft:ResearchTaxCredits

us-gaap:DomesticCountry, us-gaap:InternalRevenueServiceIRS, prft:TaxYears2011through2019


Research
Period End2021-06-302021-03-312020-12-312020-09-30
Value23201919
Percentage of ResearchTaxCredits100.0100.0100.0100.0

prft:SoftwareAccrualNoncurrent

prft:SoftwareAccrualNoncurrent


Software
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value5491000.06024000.05748000.06591000.04384000.04949000.05226000.04901000.05039000.06018000.03407000.0
Percentage of SoftwareAccrualNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

prft:StockRepurchaseProgram

prft:StockRepurchaseProgram


Stock
Period End2021-06-302021-03-312020-12-312020-09-30
Value251244239231
Percentage of StockRepurchaseProgram100.0100.0100.0100.0

prft:StockRepurchaseProgramCumulativeAmountRepurchasedShares

prft:StockRepurchaseProgramCumulativeAmountRepurchasedShares


Stock
Period End2021-06-302021-03-312020-12-312020-09-30
Value16151515
Percentage of StockRepurchaseProgramCumulativeAmountRepurchasedShares100.0100.0100.0100.0

us-gaap:AllowanceForDoubtfulAccountsReceivable

us-gaap:AllowanceForDoubtfulAccountsReceivable


Allowance
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value1677000.0990000.01065000.01207000.01715000.01623000.0464000.0810000.01272000.01277000.0749000.0911000.0763000.0724000.01057000.0228000.0315000.0
Percentage of AllowanceForDoubtfulAccountsReceivable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AllowanceForDoubtfulAccountsReceivable us-gaap:CumulativeEffectPeriodOfAdoption

srt:CumulativeEffectPeriodOfAdoptionAdjustedBalance


Allowance
Period End2020-12-312020-06-302019-12-31
Value1065000.01715000.0887000.0
Percentage of AllowanceForDoubtfulAccountsReceivable100.0100.0191.2

us-gaap:BusinessAcquisitionPurchasePriceAllocationGoodwillExpectedTaxDeductibleAmount us-gaap:BusinessAcquisition

us-gaap:BusinessAcquisitionPurchasePriceAllocationGoodwillExpectedTaxDeductibleAmount

prft:SouthportStoneTempleAndElixiter


Business
Period End2020-12-31
Value17
Percentage of BusinessAcquisitionPurchasePriceAllocationGoodwillExpectedTaxDeductibleAmount100.0

prft:SundogInteractive


Business
Period End2020-12-312019-12-312019-09-302019-06-30
Value8.05.55.56.2
Percentage of BusinessAcquisitionPurchasePriceAllocationGoodwillExpectedTaxDeductibleAmount45.20.00.00.0

us-gaap:BusinessCombinationContingentConsiderationArrangementsRangeOfOutcomesValueHigh us-gaap:SubsequentEventType

us-gaap:BusinessCombinationContingentConsiderationArrangementsRangeOfOutcomesValueHigh

us-gaap:SubsequentEvent


Business
Period End2021-01-06
Value10
Percentage of BusinessCombinationContingentConsiderationArrangementsRangeOfOutcomesValueHigh100.0

us-gaap:BusinessCombinationContingentConsiderationLiability us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationContingentConsiderationLiability

prft:Brainjocks


Business
Period End2021-06-302021-03-312020-12-31
Value3.93.93.6
Percentage of BusinessCombinationContingentConsiderationLiability100.0100.0100.0

prft:MedTouch


Business
Period End2021-06-302021-03-312020-12-312020-09-302020-06-30
Value9.29.08.98.26.2
Percentage of BusinessCombinationContingentConsiderationLiability235.9230.8247.20.00.0

prft:PSL


Business
Period End2021-06-302021-03-312020-12-31
Value202121
Percentage of BusinessCombinationContingentConsiderationLiability535.9553.8597.2

prft:SundogInteractive


Business
Period End2020-09-302020-06-302019-12-312019-09-30
Value2.52.52.82.3
Percentage of BusinessCombinationContingentConsiderationLiability0.00.00.00.0

us-gaap:BusinessCombinationContingentConsiderationLiabilityCurrent

us-gaap:BusinessCombinationContingentConsiderationLiabilityCurrent


Business
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
Value2434332927104.1963.5848.786.7217.15615139.1188.1484.1687.2444.0873.3845.904
Percentage of BusinessCombinationContingentConsiderationLiabilityCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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

us-gaap:CashAndCashEquivalentsFairValueDisclosure

us-gaap:MoneyMarketFunds, us-gaap:FairValueInputsLevel1


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value765766392.5226428262137
Percentage of CashAndCashEquivalentsFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ContractWithCustomerLiability

us-gaap:ContractWithCustomerLiability


Contract
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value6300000.08800000.09400000.06200000.07000000.08500000.07700000.05700000.07300000.06800000.08100000.04700000.04985000.04890000.03278000.0
Percentage of ContractWithCustomerLiability100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConvertibleDebt us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:ConvertibleDebt

prft:ConvertibleSeniorNotesDue2025, us-gaap:ConvertibleDebt


Convertible
Period End2020-08-14
Value181
Percentage of ConvertibleDebt100.0

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

us-gaap:DebtInstrumentCarryingAmount

prft:ConvertibleSeniorNotesDue2023, us-gaap:ConvertibleDebt


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value5.095.095.112143143143143143
Percentage of DebtInstrumentCarryingAmount100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DebtInstrumentConvertibleConversionPrice1 us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:DebtInstrumentConvertibleConversionPrice1

prft:ConvertibleSeniorNotesDue2023, us-gaap:ConvertibleDebt


Debt
Period End2020-08-142020-06-302018-09-11
Value46.6235.7837.6
Percentage of DebtInstrumentConvertibleConversionPrice1100.0100.0100.0

prft:ConvertibleSeniorNotesDue2025, us-gaap:ConvertibleDebt


Debt
Period End2020-08-14
Value51.67
Percentage of DebtInstrumentConvertibleConversionPrice1110.8

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

us-gaap:DebtInstrumentFaceAmount

prft:ConvertibleSeniorNotesDue2025, us-gaap:ConvertibleDebt


Debt
Period End2020-08-14
Value230
Percentage of DebtInstrumentFaceAmount100.0

us-gaap:DebtInstrumentFairValue us-gaap:DebtInstrument, us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:DebtInstrumentFairValue

prft:ConvertibleSeniorNotesDue2023, us-gaap:FairValueInputsLevel2


Debt
Period End2021-06-302021-03-312020-12-312020-09-30
Value108.67.115
Percentage of DebtInstrumentFairValue100.0100.0100.0100.0

prft:ConvertibleSeniorNotesDue2025, us-gaap:FairValueInputsLevel2


Debt
Period End2021-06-302021-03-312020-12-312020-09-30
Value376297263244
Percentage of DebtInstrumentFairValue3653.43457.03709.91535.2

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

us-gaap:DebtInstrumentInterestRateEffectivePercentage

prft:ConvertibleSeniorNotesDue2023, prft:ConvertibleDebtEquityComponent


Debt
Period End2020-12-312020-09-30
Value5.05.2
Percentage of DebtInstrumentInterestRateEffectivePercentage100.0100.0

prft:ConvertibleSeniorNotesDue2025, us-gaap:ConvertibleDebt


Debt
Period End2020-08-14
Value6.3
Percentage of DebtInstrumentInterestRateEffectivePercentage0.0

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

us-gaap:DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet

prft:ConvertibleSeniorNotesDue2023, us-gaap:ConvertibleDebt


Debt
Period End2020-12-312020-09-302018-09-11
Value-2400000.0-2300000.04400000.0
Percentage of DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet100.0100.0100.0

prft:ConvertibleSeniorNotesDue2025, us-gaap:ConvertibleDebt


Debt
Period End2020-08-14
Value7300000.0
Percentage of DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet0.0

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

us-gaap:DebtInstrumentUnamortizedDiscountPremiumNet

prft:ConvertibleSeniorNotesDue2023, us-gaap:ConvertibleDebt


Debt
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value0.3520.3890.4261.1371415161619
Percentage of DebtInstrumentUnamortizedDiscountPremiumNet100.0100.0100.0100.0100.0100.0100.0100.0100.0

prft:ConvertibleSeniorNotesDue2025, us-gaap:ConvertibleDebt


Debt
Period End2021-06-302021-03-312020-12-312020-09-30
Value41434547
Percentage of DebtInstrumentUnamortizedDiscountPremiumNet11736.111185.310725.44206.4

us-gaap:DeferredCompensationLiabilityClassifiedNoncurrent

us-gaap:DeferredCompensationLiabilityClassifiedNoncurrent


Deferred
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value8709000.08220000.07456000.06583000.05976000.04943000.05566000.05071000.05048000.04980000.04278000.04874000.04620000.04667000.04409000.04173000.03973000.03990000.03662000.03449000.03156000.03175000.03376000.02773000.02160000.01383000.01141000.0
Percentage of DeferredCompensationLiabilityClassifiedNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredCompensationLiabilityCurrentAndNoncurrent

us-gaap:DeferredCompensationLiabilityCurrentAndNoncurrent


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value7500000.05700000.04500000.04700000.03700000.03400000.02800000.02300000.01700000.01600000.0
Percentage of DeferredCompensationLiabilityCurrentAndNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredFinanceCostsGross us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:DeferredFinanceCostsGross

prft:ConvertibleSeniorNotesDue2025, us-gaap:ConvertibleDebt


Deferred
Period End2020-08-14
Value7300000.0
Percentage of DeferredFinanceCostsGross100.0

us-gaap:DeferredFinanceCostsNet us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:DeferredFinanceCostsNet

prft:ConvertibleSeniorNotesDue2023, us-gaap:ConvertibleDebt


Deferred
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value64000.072000.079000.0212000.02642000.02848000.03053000.03260000.03877000.0
Percentage of DeferredFinanceCostsNet100.0100.0100.0100.0100.0100.0100.0100.0100.0

prft:ConvertibleSeniorNotesDue2025, us-gaap:ConvertibleDebt


Deferred
Period End2021-06-302021-03-312020-12-312020-09-30
Value4696000.04983000.05271000.05597000.0
Percentage of DeferredFinanceCostsNet7337.56920.86672.22640.1

us-gaap:DeferredIncomeTaxLiabilities

us-gaap:DeferredIncomeTaxLiabilities


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value342819162314149.927.2437.014
Percentage of DeferredIncomeTaxLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredRevenueCurrent

us-gaap:DeferredRevenueCurrent


Deferred
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-312018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-31
Value6287000.08823000.09422000.06187000.06990000.08521000.07733000.05740000.07313000.08111000.04890000.03278000.03025000.03762000.03179000.03138000.03612000.04734000.05340000.05414000.04070000.05180000.06457000.05945000.03253000.03376000.03696000.03590000.02764000.02771000.01171000.02974000.01556000.01114000.01041000.0
Percentage of DeferredRevenueCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsGoodwillAndIntangibleAssets

us-gaap:DeferredTaxAssetsGoodwillAndIntangibleAssets


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value1844000.07946000.05769000.04097000.03624000.0646000.002101000.03256000.02382000.0
Percentage of DeferredTaxAssetsGoodwillAndIntangibleAssets100.0100.0100.0100.0100.0100.00.0100.0100.0100.0

us-gaap:DeferredTaxAssetsGross

us-gaap:DeferredTaxAssetsGross


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value1317109.514106.5266.2298.3668.7587.944
Percentage of DeferredTaxAssetsGross100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsOperatingLossCarryforwards

us-gaap:DeferredTaxAssetsOperatingLossCarryforwards


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value203000.0287000.0375000.0483000.0893000.01051000.01265000.01510000.01908000.02258000.0
Percentage of DeferredTaxAssetsOperatingLossCarryforwards100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsOther

us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsOther


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value2511000.02324000.02443000.02579000.03851000.03375000.03060000.02728000.01936000.01908000.0
Percentage of DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsOther100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities

us-gaap:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value1473000.01545000.01617000.02027000.01710000.01164000.01172000.01172000.0849000.0804000.0
Percentage of DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAllowanceForDoubtfulAccounts

us-gaap:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAllowanceForDoubtfulAccounts


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value273000.0119000.0208000.0328000.0497000.0
Percentage of DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAllowanceForDoubtfulAccounts100.0100.0100.0100.0100.0

us-gaap:DeferredTaxLiabilitiesGoodwillAndIntangibleAssets

us-gaap:DeferredTaxLiabilitiesGoodwillAndIntangibleAssets


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value232017131812127.5945.8936.367
Percentage of DeferredTaxLiabilitiesGoodwillAndIntangibleAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxLiabilitiesOther

us-gaap:DeferredTaxLiabilitiesOther


Deferred
Period End2020-12-312016-12-312015-12-31
Value1828000.03096000.00
Percentage of DeferredTaxLiabilitiesOther100.0100.00.0

us-gaap:DeferredTaxLiabilitiesPrepaidExpenses

us-gaap:DeferredTaxLiabilitiesPrepaidExpenses


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value1206000.01044000.0933000.0902000.0965000.01380000.0809000.0829000.0421000.0403000.0
Percentage of DeferredTaxLiabilitiesPrepaidExpenses100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxLiabilitiesPropertyPlantAndEquipment

us-gaap:DeferredTaxLiabilitiesPropertyPlantAndEquipment


Deferred
Period End2020-12-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value1430000.01528000.0851000.0631000.01195000.01039000.01352000.01372000.0786000.087000.0
Percentage of DeferredTaxLiabilitiesPropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredTaxLiabilityNotRecognizedAmountOfUnrecognizedDeferredTaxLiabilityUndistributedEarningsOfForeignSubsidiaries

us-gaap:DeferredTaxLiabilityNotRecognizedAmountOfUnrecognizedDeferredTaxLiabilityUndistributedEarningsOfForeignSubsidiaries


Deferred
Period End2021-06-302021-03-312020-12-312020-09-30
Value1100000.0900000.0700000.0700000.0
Percentage of DeferredTaxLiabilityNotRecognizedAmountOfUnrecognizedDeferredTaxLiabilityUndistributedEarningsOfForeignSubsidiaries100.0100.0100.0100.0

us-gaap:DerivativeNotionalAmount us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation

us-gaap:DerivativeNotionalAmount

us-gaap:ForeignExchangeForward, us-gaap:Nondesignated


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value201716119.4252.3732.5233.4563.195
Percentage of DerivativeNotionalAmount100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeNotionalAmount us-gaap:HedgingDesignation

us-gaap:Nondesignated


Derivative
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value201716119.4252.3732.5233.4563.195
Percentage of DerivativeNotionalAmount100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized


Employee
Period End2021-06-302021-03-312020-12-312020-09-30
Value27322619
Percentage of EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized100.0100.0100.0100.0

us-gaap:FiniteLivedIntangibleAssetsAccumulatedAmortization

us-gaap:FiniteLivedIntangibleAssetsAccumulatedAmortization


Finite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-31
Value56656056494457545451484541393835313235343129262421212120141312119.309-9.933-8.7018.9571012
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FiniteLivedIntangibleAssetsAccumulatedAmortization us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:CustomerRelationships


Finite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-31
Value464744433936494647444037343132292627303027262320181816161111109.2357.847-8.7187.2997.0029.14311
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization81.373.173.477.580.682.385.985.986.885.684.483.283.880.882.983.384.584.986.387.287.387.987.586.183.587.177.980.780.884.488.083.084.387.8-83.978.287.193.2

us-gaap:NoncompeteAgreements


Finite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-31
Value0.9370.9040.8310.7940.7380.6680.6010.6190.5690.5020.7350.7890.7050.7880.7070.6280.5460.6010.5570.5060.4890.5030.7191.0420.9620.8820.8660.7850.8480.7550.7150.6350.557-0.4940.4250.3530.3160.309
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization1.71.41.41.41.51.51.01.11.01.01.51.71.72.01.81.81.71.81.61.51.51.72.74.34.44.14.13.86.05.55.85.76.05.0-4.93.93.02.4

us-gaap:OrderOrProductionBacklog


Finite
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value6.8185.9412.9830.720.1440.987
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization10.49.95.31.50.31.7

us-gaap:SoftwareDevelopment


Finite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-31
Value9.6239.5938.9318.8278.1397.0486.5476.0615.9716.4956.0336.3355.8185.3735.0394.7974.2654.3124.0963.6733.2622.872.4992.1611.8281.4691.4161.080.720.6010.5080.7190.703-0.6390.5890.6140.5550.477
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization17.014.714.815.616.415.711.311.210.912.612.414.014.113.712.913.513.513.211.610.510.39.69.39.08.46.86.75.35.14.44.16.57.66.4-6.86.95.33.7

us-gaap:TradeNames


Finite
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-31
Value0.250.2810.1570.0550.0670.0370.0490.0650.0410.0760.0430.0180.0770.0530.0530.040.0220.0070.050.0830.0580.0330.0820.0580.0360.1480.1060.0880.1370.0830.0460.017-0.0820.2040.1550.1050.084
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization0.40.50.30.10.10.10.10.10.10.20.10.00.20.10.10.10.10.00.10.30.20.10.30.30.20.70.50.61.00.70.40.20.8-2.31.71.00.7

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive


Finite
Period End2021-06-302021-03-312020-12-312020-09-30
Value2360000.02373000.02354000.06673000.0
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive100.0100.0100.0100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths


Finite
Period End2021-06-302021-03-312020-12-312020-09-30
Value15152120
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths100.0100.0100.0100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear


Finite
Period End2021-06-302021-03-312020-09-30
Value8.135146.978
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear100.0100.0100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFive

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFive


Finite
Period End2020-12-31
Value4618000.0
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseYearFive100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFour

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFour


Finite
Period End2021-06-302021-03-312020-12-312020-09-30
Value4431000.04522000.07971000.07410000.0
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseYearFour100.0100.0100.0100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearThree

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearThree


Finite
Period End2021-06-302021-03-312020-12-312020-09-30
Value7.6247.7281110
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseYearThree100.0100.0100.0100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo


Finite
Period End2021-06-302021-03-312020-12-312020-09-30
Value10101515
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo100.0100.0100.0100.0

us-gaap:FiniteLivedIntangibleAssetsGross

us-gaap:FiniteLivedIntangibleAssetsGross


Finite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-31
Value105120123124125949595999596959086909090798080798080767376677067563732312526282822
Percentage of FiniteLivedIntangibleAssetsGross100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FiniteLivedIntangibleAssetsGross us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:CustomerRelationships


Finite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-31
Value90969798100798282868282807671757575666767676868656265545654463126262222232320
Percentage of FiniteLivedIntangibleAssetsGross85.679.678.879.780.384.486.086.086.586.285.484.284.883.283.883.683.884.084.184.585.085.686.085.483.984.980.781.280.982.282.482.984.988.187.184.185.390.2

us-gaap:NoncompeteAgreements


Finite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-31
Value1.4241.4671.4791.4981.5231.3571.2641.3521.3711.2321.5361.6261.6061.5561.5561.5861.5861.2471.0180.8580.8580.9591.2351.5931.5731.5731.6011.6011.7451.7061.4771.41.41.1561.1561.1561.0771.073
Percentage of FiniteLivedIntangibleAssetsGross1.31.21.21.21.21.41.31.41.41.31.61.71.81.81.71.71.81.61.31.11.11.21.52.12.12.02.42.32.63.03.94.34.44.54.44.13.84.7

us-gaap:OrderOrProductionBacklog


Finite
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value8.643109.029.0831.1051.102
Percentage of FiniteLivedIntangibleAssetsGross7.28.47.37.21.21.1

us-gaap:SoftwareDevelopment


Finite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-31
Value131413141312101010111011111111111111111110109.59.3619.188.898.8978.3977.9325.8484.6043.3462.5841.8121.6421.6921.7161.036
Percentage of FiniteLivedIntangibleAssetsGross13.111.811.311.510.912.911.511.110.711.511.312.512.613.012.612.612.514.314.114.013.412.611.912.312.411.613.212.011.810.312.210.38.27.06.36.06.14.5

us-gaap:TradeNames


Finite
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-31
Value0.3170.4490.4110.4190.170.060.090.130.070.140.110.070.10.10.140.170.060.030.060.10.10.10.1280.0880.0880.1670.1670.2130.2710.1590.1140.1140.1030.2650.2650.220.152
Percentage of FiniteLivedIntangibleAssetsGross0.30.40.30.30.20.10.10.10.10.10.10.10.10.10.20.20.10.00.10.10.10.10.20.10.10.20.20.30.50.40.40.40.41.00.90.80.7

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths


Lessee
Period End2021-06-302021-03-312020-12-312020-09-30
Value10109.429.914
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths100.0100.0100.0100.0

us-gaap:LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear

us-gaap:LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear


Lessee
Period End2021-06-302021-03-312020-09-30
Value3803000.06564000.02167000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear100.0100.0100.0

us-gaap:LifeInsuranceCorporateOrBankOwnedAmount

us-gaap:LifeInsuranceCorporateOrBankOwnedAmount


Life
Period End2020-12-312019-12-312018-12-31
Value7400000.05600000.04300000.0
Percentage of LifeInsuranceCorporateOrBankOwnedAmount100.0100.0100.0

us-gaap:LineOfCreditFacilityInterestRateAtPeriodEnd us-gaap:CreditFacility, us-gaap:DebtInstrument, us-gaap:VariableRate

us-gaap:LineOfCreditFacilityInterestRateAtPeriodEnd

us-gaap:RevolvingCreditFacility, prft:CreditAgreement, us-gaap:LondonInterbankOfferedRateLIBOR


Line
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value0.110.140.150.00160.00990.01760.02020.0240.02490.0250.02260.02090.01880.01560.01230.01220.009830.007720.00530.00470.0044
Percentage of LineOfCreditFacilityInterestRateAtPeriodEnd100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RevolvingCreditFacility, prft:CreditAgreement, us-gaap:PrimeRate


Line
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value3.253.253.250.03250.03250.04750.050.0550.0550.0550.05250.050.04750.0450.04250.04250.040.03750.0350.0350.035
Percentage of LineOfCreditFacilityInterestRateAtPeriodEnd2954.52321.42166.72031.2328.3269.9247.5229.2220.9220.0232.3239.2252.7288.5345.5348.4406.9485.8660.4744.7795.5

us-gaap:LineOfCreditFacilityRemainingBorrowingCapacity us-gaap:CreditFacility, us-gaap:DebtInstrument

us-gaap:LineOfCreditFacilityRemainingBorrowingCapacity

us-gaap:RevolvingCreditFacility, prft:CreditAgreement


Line
Period End2021-06-302021-03-312020-12-312020-09-30
Value199124124124
Percentage of LineOfCreditFacilityRemainingBorrowingCapacity100.0100.0100.0100.0

us-gaap:OperatingLeaseWeightedAverageDiscountRatePercent

us-gaap:OperatingLeaseWeightedAverageDiscountRatePercent


Operating
Period End2020-12-312019-12-31
Value3.54.6
Percentage of OperatingLeaseWeightedAverageDiscountRatePercent100.0100.0

us-gaap:OperatingLossCarryforwards us-gaap:IncomeTaxAuthority, us-gaap:IncomeTaxAuthorityName

us-gaap:OperatingLossCarryforwards

us-gaap:DomesticCountry, us-gaap:InternalRevenueServiceIRS


Operating
Period End2020-12-31
Value800000.0
Percentage of OperatingLossCarryforwards100.0

us-gaap:OtherSundryLiabilitiesCurrent

us-gaap:OtherSundryLiabilitiesCurrent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312014-12-312013-12-31
Value6032000.09589000.07652000.07954000.07285000.06462000.05841000.05013000.06659000.04022000.06021000.04452000.04652000.04274000.03879000.05713000.04029000.03995000.04139000.03729000.04897000.03473000.04188000.05320000.04073000.0
Percentage of OtherSundryLiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherSundryLiabilitiesNoncurrent

us-gaap:OtherSundryLiabilitiesNoncurrent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-31
Value3.4463.943109.809138.7448.688.3237.3115.0398.4397.7426.0214.8594.6671.9961.8582.6252.5432.1282.0991.2191.139
Percentage of OtherSundryLiabilitiesNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PrepaidExpenseCurrent

us-gaap:PrepaidExpenseCurrent


Prepaid
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value6354000.06468000.05575000.06187000.05679000.06493000.04647000.06027000.04991000.05316000.04663000.04303000.04523000.04845000.04470000.04550000.04028000.04721000.03353000.03978000.03537000.03456000.03297000.03745000.03519000.03910000.02476000.02651000.02589000.02813000.02569000.02146000.02071000.02148000.01649000.01564000.01219000.01496000.01246000.01823000.01388000.01270000.0
Percentage of PrepaidExpenseCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber us-gaap:AwardType, us-gaap:PlanName

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber

us-gaap:RestrictedStock, prft:LongTermIncentivePlan2012


Share
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-31
Value815000.0843000.0905000.0916000.0924000.0973000.01097000.01210000.01234000.01277000.01410000.01381000.01400000.01438000.01436000.01329000.01364000.01435000.01403000.01276000.01343000.01394000.01370000.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue us-gaap:AwardType, us-gaap:PlanName

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue

us-gaap:RestrictedStock, prft:LongTermIncentivePlan2012


Share
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-31
Value41.6841.535.3431.4531.4531.2427.1422.8822.8522.8320.9518.9118.8818.8318.1217.317.2617.2717.5218.6218.5318.4917.82
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant us-gaap:PlanName

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant

prft:LongTermIncentivePlan2012


Share
Period End2021-06-302021-03-312020-12-312020-09-30
Value1300000.01200000.01400000.01700000.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant100.0100.0100.0100.0

us-gaap:SharePrice

us-gaap:SharePrice


Share
Period End2021-06-302021-03-312020-12-312020-09-30
Value80.4258.7247.6542.74
Percentage of SharePrice100.0100.0100.0100.0

us-gaap:UnbilledReceivablesCurrent

us-gaap:UnbilledReceivablesCurrent


Unbilled
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302011-12-31
Value6156475149494248485035444544303636332437414437383435313936332332302620242617
Percentage of UnbilledReceivablesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:UndistributedEarningsOfForeignSubsidiaries

us-gaap:UndistributedEarningsOfForeignSubsidiaries


Undistributed
Period End2021-06-302021-03-312020-12-312020-09-30
Value16151413
Percentage of UndistributedEarningsOfForeignSubsidiaries100.0100.0100.0100.0

us-gaap:UnrecognizedTaxBenefitsIncomeTaxPenaltiesAccrued

us-gaap:UnrecognizedTaxBenefitsIncomeTaxPenaltiesAccrued


Unrecognized
Period End2021-06-302021-03-312020-12-31
Value108.3658.009
Percentage of UnrecognizedTaxBenefitsIncomeTaxPenaltiesAccrued100.0100.0100.0

us-gaap:UnrecognizedTaxBenefitsInterestOnIncomeTaxesAccrued

us-gaap:UnrecognizedTaxBenefitsInterestOnIncomeTaxesAccrued


Unrecognized
Period End2021-06-302021-03-312020-12-312020-09-302019-12-312018-12-312017-12-31
Value1200000.01000000.0900000.0900000.0600000.0300000.0200000.0
Percentage of UnrecognizedTaxBenefitsInterestOnIncomeTaxesAccrued100.0100.0100.0100.0100.0100.0100.0

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:InterestExpenseDebt
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
(None, 'us-gaap:SeniorNotes')
Interest Expense Debtus-gaap: Debt Instrument, us-gaap: Longterm Debt Type
us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax
us-gaap:ProductOrService
(None,)
Revenue From Contract With Customer Excluding Assessed Taxus-gaap: Product Or Service
us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax
us-gaap:TimingOfTransferOfGoodOrService
(None,)
Revenue From Contract With Customer Excluding Assessed Taxus-gaap: Timing Of Transfer Of Good Or Service
us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax
us-gaap:StatementGeographical
(None,)
Revenue From Contract With Customer Excluding Assessed Taxus-gaap: Statement Geographical
us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax
us-gaap:ProductOrService, us-gaap:ContractWithCustomerBasisOfPricing
('prft:ProfessionalServices', None)
Revenue From Contract With Customer Excluding Assessed Taxus-gaap: Product Or Service, us-gaap: Contract With Customer Basis Of Pricing
us-gaap:StockholdersEquity
us-gaap:StatementEquityComponents
(None,)
Stockholders Equityus-gaap: Statement Equity Components
us-gaap:PropertyPlantAndEquipmentGross
us-gaap:PropertyPlantAndEquipmentByType
(None,)
Property Plant And Equipment Grossus-gaap: Property Plant And Equipment By Type
us-gaap:IntangibleAssetsNetExcludingGoodwill
us-gaap:FiniteLivedIntangibleAssetsByMajorClass
(None,)
Intangible Assets Net Excluding Goodwillus-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:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue
us-gaap:StatementEquityComponents
(None,)
Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Valueus-gaap: Statement Equity Components
us-gaap:AmortizationOfFinancingCosts
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
(None, 'us-gaap:SeniorNotes')
Amortization Of Financing Costsus-gaap: Debt Instrument, us-gaap: Longterm Debt Type