FSLY


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

Table of contents



us-gaap:CommonStockValue
us-gaap:StatementClassOfStock
us-gaap:CommonStockSharesIssued
us-gaap:StatementClassOfStock
us-gaap:CommonStockSharesOutstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding
us-gaap:StatementClassOfStock

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic
us-gaap:StatementClassOfStock

us-gaap:WeightedAverageNumberOfShareOutstandingBasicAndDiluted
us-gaap:StatementClassOfStock

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecurities

us-gaap:EarningsPerShareBasic
us-gaap:StatementClassOfStock

us-gaap:EarningsPerShareDiluted
us-gaap:StatementClassOfStock

us-gaap:EarningsPerShareBasicAndDiluted
us-gaap:StatementClassOfStock

us-gaap:AllocatedShareBasedCompensationExpense
us-gaap:AwardType
us-gaap:IncomeStatementLocation

us-gaap:ComprehensiveIncomeNetOfTax

us-gaap:CostOfRevenue

us-gaap:GeneralAndAdministrativeExpense

us-gaap:GrossProfit

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments

us-gaap:IncomeTaxExpenseBenefit

us-gaap:IncomeTaxesPaidNet

us-gaap:InterestExpense

us-gaap:InterestExpenseDebt

us-gaap:InterestPaidNet

us-gaap:NetIncomeLoss
us-gaap:BusinessAcquisition
us-gaap:StatementEquityComponents
us-gaap:StatementClassOfStock
us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic

us-gaap:OperatingExpenses

us-gaap:OperatingIncomeLoss

us-gaap:OtherNonoperatingIncomeExpense

us-gaap:ResearchAndDevelopmentExpense

us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax
us-gaap:BusinessAcquisition
us-gaap:MajorCustomers
us-gaap:StatementGeographical

us-gaap:SellingAndMarketingExpense

us-gaap:Assets

us-gaap:Liabilities

us-gaap:LiabilitiesAndStockholdersEquity

us-gaap:StockholdersEquity
us-gaap:StatementClassOfStock, us-gaap:StatementEquityComponents
us-gaap:StatementEquityComponents

us-gaap:AssetsCurrent

us-gaap:CashAndCashEquivalentsAtCarryingValue
us-gaap:CashAndCashEquivalents

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

us-gaap:ShortTermInvestments
us-gaap:FinancialInstrument

us-gaap:MarketableSecuritiesCurrent

us-gaap:AccountsReceivableNetCurrent

us-gaap:PrepaidExpenseAndOtherAssetsCurrent

us-gaap:PropertyPlantAndEquipmentGross
us-gaap:PropertyPlantAndEquipmentByType

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment

us-gaap:AmortizationOfIntangibleAssets

us-gaap:PropertyPlantAndEquipmentNet
us-gaap:PropertyPlantAndEquipmentByType
us-gaap:StatementGeographical

us-gaap:Goodwill
us-gaap:BusinessAcquisition
us-gaap:FiniteLivedIntangibleAssetsByMajorClass
us-gaap:IndefiniteLivedIntangibleAssetsExcludingGoodwill

us-gaap:IntangibleAssetsNetExcludingGoodwill

us-gaap:FiniteLivedIntangibleAssetsNet
us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:OperatingLeaseRightOfUseAsset
us-gaap:BusinessAcquisition

us-gaap:OtherAssetsNoncurrent

us-gaap:AccountsPayableCurrent

us-gaap:AccruedLiabilitiesCurrent

us-gaap:ContractWithCustomerLiabilityCurrent

us-gaap:LiabilitiesCurrent

us-gaap:LongTermDebtCurrent

us-gaap:OperatingLeaseLiabilityCurrent

us-gaap:OtherAccruedLiabilitiesCurrent

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

us-gaap:LongTermDebtNoncurrent

us-gaap:LongTermDebtAndCapitalLeaseObligations

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:BusinessAcquisition

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount

us-gaap:StockholdersEquity
us-gaap:StatementClassOfStock, us-gaap:StatementEquityComponents
us-gaap:StatementEquityComponents

us-gaap:CommonStockValue

us-gaap:AdditionalPaidInCapital

us-gaap:RetainedEarningsAccumulatedDeficit

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax

us-gaap:StockIssuedDuringPeriodValueNewIssues
us-gaap:StatementEquityComponents

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue
us-gaap:StatementEquityComponents

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect

us-gaap:AmortizationOfFinancingCosts

us-gaap:DepreciationDepletionAndAmortization

us-gaap:IncreaseDecreaseInAccountsPayable

us-gaap:IncreaseDecreaseInAccountsReceivable

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetIncomeLoss
us-gaap:BusinessAcquisition
us-gaap:StatementEquityComponents

us-gaap:ShareBasedCompensation

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber

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

us-gaap:DeferredTaxLiabilities

us-gaap:UnrecognizedTaxBenefits

us-gaap:DeferredTaxAssetsValuationAllowance

fsly:AmortizationOfDeferredRent

fsly:AmortizationOfRightOfUseAssetsAndOther

fsly:AmountWithheldInContributionsForEmployeeStockPurchasePlan
us-gaap:BusinessAcquisition
fsly:BusinessCombinationConsiderationTransferredPortionAllocatedToFutureServices
us-gaap:BusinessAcquisition
fsly:BusinessCombinationConsiderationTransferredPortionAllocatedToPurchasePrice

fsly:CashReleasedFromRestriction

fsly:CashlessExerciseOfCommonStockWarrants
us-gaap:StatementClassOfStock, us-gaap:SubsequentEventType
fsly:CommonStockSharesRetired

fsly:FinanceLeaseCost

fsly:IncreaseDecreaseInOperatingLeaseLiabilities

fsly:InterestPaidonCapitalLease

fsly:OperatingVariableAndShortTermLeaseCosts
us-gaap:AwardType
fsly:SharebasedCompensationArrangementbySharebasedPaymentAwardMaximumEmployeeDeferralAsAPercentOfSalary

fsly:StockIssuedDuringPeriodValueVestingOfEarlyExercisedStockOptions
us-gaap:StatementEquityComponents

fsly:VestingofEarlyExercisedStockOptions

us-gaap:AmortizationOfFinancingCostsAndDiscounts
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationConsiderationTransferred1
us-gaap:BusinessAcquisition, us-gaap:SubsequentEventType

us-gaap:CapitalExpendituresIncurredButNotYetPaid

us-gaap:CapitalLeaseObligationsIncurred

us-gaap:CapitalizedContractCostAmortization

us-gaap:ContractWithCustomerLiabilityIncreaseDecreaseForContractAcquiredInBusinessCombination

us-gaap:ContractWithCustomerLiabilityRevenueRecognized
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:DebtInstrumentInterestRateDuringPeriod

us-gaap:Depreciation
us-gaap:PropertyPlantAndEquipmentByType

us-gaap:DepreciationNonproduction

us-gaap:EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents
us-gaap:AwardType
us-gaap:EmployeeBenefitsAndShareBasedCompensation

us-gaap:EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount

us-gaap:ExtinguishmentOfDebtAmount

us-gaap:FinanceLeaseInterestExpense

us-gaap:FinanceLeaseInterestPaymentOnLiability

us-gaap:FinanceLeasePrincipalPayments

us-gaap:FinanceLeaseRightOfUseAssetAmortization

us-gaap:GainLossOnSaleOfPropertyPlantEquipment
us-gaap:PropertyPlantAndEquipmentByType

us-gaap:GoodwillForeignCurrencyTranslationGainLoss

us-gaap:IncreaseDecreaseInAccruedLiabilities

us-gaap:IncreaseDecreaseInOtherOperatingAssets

us-gaap:IncreaseDecreaseInOtherOperatingLiabilities

us-gaap:IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets

us-gaap:InvestmentIncomeInterest

us-gaap:LeaseAndRentalExpense

us-gaap:OperatingLeaseCost

us-gaap:OperatingLeasePayments

us-gaap:OperatingLeasesIncomeStatementSubleaseRevenue

us-gaap:OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent

us-gaap:OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent

us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent
us-gaap:StatementEquityComponents

us-gaap:OtherNoncashIncomeExpense

us-gaap:PaymentsForSoftware

us-gaap:PaymentsOfDebtIssuanceCosts
us-gaap:SubsidiarySaleOfStock
us-gaap:PaymentsOfStockIssuanceCosts
us-gaap:BusinessAcquisition
us-gaap:PaymentsToAcquireBusinessesGross
us-gaap:BusinessAcquisition, us-gaap:SubsequentEventType

us-gaap:PaymentsToAcquireIntangibleAssets
us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:PaymentsToAcquireShortTermInvestments

us-gaap:ProceedsFromConvertibleDebt
us-gaap:DebtInstrument

us-gaap:ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities

us-gaap:ProceedsFromSaleAndMaturityOfMarketableSecurities

us-gaap:ProceedsFromSaleOfPropertyPlantAndEquipment

us-gaap:ProceedsFromStockOptionsExercised

us-gaap:ProceedsFromStockPlans

us-gaap:ProvisionForDoubtfulAccounts

us-gaap:RepaymentsOfLongTermCapitalLeaseObligations

us-gaap:RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability
us-gaap:SubsequentEventType

us-gaap:RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardAcceleratedCompensationCost
us-gaap:AwardType
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardPlanModificationIncrementalCompensationCost

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

us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedInPeriodFairValue1
us-gaap:AwardType
us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedNumberOfShares
us-gaap:AwardType
us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardPurchasePriceOfCommonStockPercent
us-gaap:StatementClassOfStock
us-gaap:StockIssuedDuringPeriodSharesConversionOfConvertibleSecurities
us-gaap:StatementClassOfStock, us-gaap:StatementEquityComponents
us-gaap:StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans
us-gaap:StatementClassOfStock, us-gaap:SubsidiarySaleOfStock
us-gaap:StockIssuedDuringPeriodSharesNewIssues

us-gaap:StockIssuedDuringPeriodSharesStockOptionsExercised

us-gaap:StockIssuedDuringPeriodValueEmployeeStockPurchasePlan
us-gaap:StatementEquityComponents

us-gaap:StockIssuedDuringPeriodValueStockOptionsExercised
us-gaap:StatementEquityComponents

us-gaap:SubleaseIncome

us-gaap:VariableLeaseCost

dei:EntityCommonStockSharesOutstanding
us-gaap:StatementClassOfStock

fsly:AccruedAcquisitionRelatedCosts

fsly:AccruedAcquisitionRelatedCostsCurrent

fsly:AccruedColocationAndBandwidthCosts

fsly:AccruedComputerAndNetworkingEquipment

fsly:AccruedPayrollTaxesCARESAct
us-gaap:AwardType, us-gaap:BusinessAcquisition, us-gaap:SubsequentEventType
fsly:BusinessCombinationAggregateRetentionPoolValue
us-gaap:BusinessAcquisition
fsly:BusinessCombinationUnvestedStockOptionAssumedFairValue
us-gaap:BusinessAcquisition
fsly:BusinessCombinationUnvestedStockOptionsAssumedConversionRatio

fsly:CashCashEquivalentsAndDebtSecuritiesAvailableForSale
us-gaap:SubsequentEventType
fsly:CashCollateralForLineOfCredit
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
fsly:DebtInstrumentFaceAmountAdditionalPrincipalIssuable

fsly:DeferredTaxAssetLeaseLiability

fsly:DeferredTaxLiabilitiesStateTaxes

fsly:FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFour

fsly:LesseeOperatingLeaseLeaseNotYetCommencedCommitmentAmount

fsly:LesseeOperatingLeaseLiabilityToBePaidAfterYearFour

fsly:LiabilityForEarlyExercisedStockOptionsCurrent

fsly:LongTermDebtAndCapitalLeaseObligationsInterestDue

fsly:LongTermDebtAndCapitalLeaseObligationsMaturitiesInterestDueInNextTwelveMonths

fsly:LongTermDebtAndCapitalLeaseObligationsMaturitiesInterestDueRemainderOfFiscalYear

fsly:LongTermDebtAndCapitalLeaseObligationsMaturitiesInterestDueYearThree

fsly:LongTermDebtAndCapitalLeaseObligationsMaturitiesInterestDueYearTwo

fsly:LongTermDebtAndCapitalLeaseObligationsMaturitiesTotalPaymentsDueInNextTwelveMonths

fsly:LongtermDebtandCapitalLeaseObligationsMaturitiesTotalPaymentsDue

fsly:LongtermDebtandCapitalLeaseObligationsMaturitiesTotalPaymentsDueRemainderofFiscalYear

fsly:LongtermDebtandCapitalLeaseObligationsMaturitiesTotalPaymentsDueYearThree

fsly:LongtermDebtandCapitalLeaseObligationsMaturitiesTotalPaymentsDueYearTwo

fsly:PrepaidCommissions

fsly:PurchaseObligationDueAfterFourthYear

fsly:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsUnvestedExercisableAggregateIntrinsicValue

fsly:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsUnvestedExercisableNumber

fsly:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsUnvestedExercisableWeightedAverageExercisePrice

us-gaap:AllowanceForDoubtfulAccountsReceivableCurrent

us-gaap:AssetsFairValueDisclosure
us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax
us-gaap:FinancialInstrument

us-gaap:AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax
us-gaap:FinancialInstrument

us-gaap:AvailableForSaleDebtSecuritiesAmortizedCostBasis
us-gaap:FinancialInstrument

us-gaap:AvailableForSaleSecuritiesDebtSecurities
us-gaap:FairValueByFairValueHierarchyLevel
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FinancialInstrument
us-gaap:FinancialInstrument

us-gaap:AvailableForSaleSecuritiesDebtSecuritiesCurrent
us-gaap:FairValueByFairValueHierarchyLevel
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FinancialInstrument
us-gaap:FinancialInstrument

us-gaap:AvailableForSaleSecuritiesDebtSecuritiesNoncurrent
us-gaap:FinancialInstrument
us-gaap:BusinessAcquisition
us-gaap:BusinessAcquisitionEquityInterestIssuedOrIssuableValueAssigned
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsOther
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilities
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles
us-gaap:BusinessAcquisition, us-gaap:FiniteLivedIntangibleAssetsByMajorClass
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilities
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherNoncurrentAssets
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet

us-gaap:CapitalLeaseObligations

us-gaap:CapitalLeaseObligationsCurrent

us-gaap:CapitalLeaseObligationsNoncurrent

us-gaap:CapitalizedContractCostNetNoncurrent

us-gaap:CashEquivalentsAtCarryingValue
us-gaap:CashAndCashEquivalents
us-gaap:CashAndCashEquivalents, us-gaap:FairValueByFairValueHierarchyLevel
us-gaap:FairValueByFairValueHierarchyLevel
us-gaap:AwardType, us-gaap:StatementClassOfStock
us-gaap:CommonStockCapitalSharesReservedForFutureIssuance
us-gaap:PlanName, us-gaap:StatementClassOfStock

us-gaap:ContractWithCustomerAssetNet

us-gaap:ContractWithCustomerLiability

us-gaap:ContractWithCustomerLiabilityNoncurrent
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:DebtInstrumentFaceAmount
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:DebtInstrumentInterestRateEffectivePercentage
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:DebtInstrumentUnamortizedDiscount
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet

us-gaap:DebtIssuanceCostsLineOfCreditArrangementsNet
us-gaap:DebtInstrument
us-gaap:DeferredFinanceCostsGross

us-gaap:DeferredIncomeTaxLiabilities

us-gaap:DeferredRentCreditNoncurrent

us-gaap:DeferredTaxAssetsGross

us-gaap:DeferredTaxAssetsOperatingLossCarryforwards

us-gaap:DeferredTaxAssetsPropertyPlantAndEquipment

us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost

us-gaap:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccruals

us-gaap:DeferredTaxLiabilitiesGoodwillAndIntangibleAssets

us-gaap:DeferredTaxLiabilitiesLeasingArrangements

us-gaap:DeferredTaxLiabilitiesOther

us-gaap:DeferredTaxLiabilitiesTaxDeferredIncome

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

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions

us-gaap:FinanceLeaseLiability

us-gaap:FinanceLeaseLiabilityCurrent

us-gaap:FinanceLeaseLiabilityNoncurrent

us-gaap:FinanceLeaseLiabilityPaymentsDue

us-gaap:FinanceLeaseLiabilityPaymentsDueNextTwelveMonths

us-gaap:FinanceLeaseLiabilityPaymentsDueYearThree

us-gaap:FinanceLeaseLiabilityPaymentsDueYearTwo

us-gaap:FinanceLeaseLiabilityPaymentsRemainderOfFiscalYear

us-gaap:FinanceLeaseLiabilityUndiscountedExcessAmount

us-gaap:FinanceLeaseRightOfUseAssetAccumulatedAmortization

us-gaap:FinanceLeaseRightOfUseAssetBeforeAccumulatedAmortization

us-gaap:FinanceLeaseWeightedAverageDiscountRatePercent

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:FiniteLivedIntangibleAssetsByMajorClass
us-gaap:FiniteLivedIntangibleAssetsGross

us-gaap:IntangibleAssetsGrossExcludingGoodwill
us-gaap:SubsequentEventType
us-gaap:LesseeFinanceLeaseDiscountRate

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths

us-gaap:LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear

us-gaap:LineOfCredit
us-gaap:SubsequentEventType

us-gaap:LongTermDebtAndCapitalLeaseObligationsMaturitiesRepaymentsOfPrincipalInYearThree

us-gaap:LongTermDebtAndCapitalLeaseObligationsMaturitiesRepaymentsOfPrincipalInYearTwo

us-gaap:LongTermDebtAndCapitalLeaseObligationsMaturitiesRepaymentsOfPrincipalRemainderOfFiscalYear

us-gaap:LongTermDebtAndCapitalLeaseObligationsRepaymentsOfPrincipalInNextTwelveMonths

us-gaap:LongTermLineOfCredit

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

us-gaap:OtherAssetsMiscellaneousNoncurrent
us-gaap:AwardType
us-gaap:OtherLiabilities

us-gaap:OtherSundryLiabilitiesCurrent

us-gaap:OtherSundryLiabilitiesNoncurrent

us-gaap:PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAccumulatedDepreciationAndAmortization

us-gaap:PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization
us-gaap:PropertyPlantAndEquipmentByType

us-gaap:PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization
us-gaap:PropertyPlantAndEquipmentByType

us-gaap:PurchaseObligation
us-gaap:RecordedUnconditionalPurchaseObligationByCategoryOfItemPurchased

us-gaap:PurchaseObligationDueInFourthYear
us-gaap:RecordedUnconditionalPurchaseObligationByCategoryOfItemPurchased

us-gaap:PurchaseObligationDueInNextTwelveMonths
us-gaap:RecordedUnconditionalPurchaseObligationByCategoryOfItemPurchased

us-gaap:PurchaseObligationDueInSecondYear
us-gaap:RecordedUnconditionalPurchaseObligationByCategoryOfItemPurchased

us-gaap:PurchaseObligationDueInThirdYear
us-gaap:RecordedUnconditionalPurchaseObligationByCategoryOfItemPurchased

us-gaap:PurchaseObligationFutureMinimumPaymentsRemainderOfFiscalYear
us-gaap:RecordedUnconditionalPurchaseObligationByCategoryOfItemPurchased

us-gaap:RestrictedCash

us-gaap:RestrictedCashAndCashEquivalents
us-gaap:CashAndCashEquivalents
us-gaap:CashAndCashEquivalents, us-gaap:FairValueByFairValueHierarchyLevel
us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:RestrictedCashAndCashEquivalentsAtCarryingValue

us-gaap:RestrictedCashCurrent

us-gaap:RestrictedCashEquivalents

us-gaap:RestrictedCashNoncurrent

us-gaap:RevenueRemainingPerformanceObligation

us-gaap:RevenueRemainingPerformanceObligationPercentage

us-gaap:SalesAndExciseTaxPayableCurrent

us-gaap:SalesAndExciseTaxPayableCurrentAndNoncurrent
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue
us-gaap:AwardType
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardMaximumEmployeeSubscriptionRate
us-gaap:AwardType, us-gaap:StatementClassOfStock
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant
us-gaap:PlanName, us-gaap:StatementClassOfStock

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableAggregateIntrinsicValue

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableNumber

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableWeightedAverageExercisePrice
us-gaap:AwardType
us-gaap:SharePrice
us-gaap:Range, us-gaap:AwardType

us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedNumberOfShares
us-gaap:AwardType
us-gaap:IncomeTaxAuthority
us-gaap:TaxCreditCarryforwardAmount

us-gaap:UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate

Plots across concepts


IncomeStatement
Income Loss From Continuing Operations 
Before Income Taxes Minority Interest And Income Loss From Equity Method Investments
Expenses
Income Tax Expense Benefit
Balance Sheet
Operating Lease Right Of Use Asset
Assets
Operating Lease Right Of Use Asset
Current Assets
Prepaid Expense And Other Assets Current
NonCurrent Assets
Other Assets Noncurrent
PropertyPlantAndEquipmentNet
Accumulated Depreciation Depletion And Amortization Property Plant And Equipment
Liabilities
Operating Lease Liability
Current Liabilities
Other Accrued Liabilities Current
Noncurrent Liabilities
Other Liabilities Noncurrent
Stockholders Equity
Retained Earnings Accumulated Deficit
CashFlow
Net Cash Provided By Used In Investing Activities
NetCashProvidedByUsedInOperatingActivities
Net Income Loss
NetCashProvidedByUsedInInvestingActivities
Net Cash Provided By Used In Investing Activities
Shares
Weighted Average Number Of Share Outstanding Basic And Diluted
OperatingLeaseLiability
Operating Lease Liability Current
LesseeOperatingLeaseLiabilityPaymentsDue
Lessee Operating Lease Liability Undiscounted Excess Amount
FiniteLivedIntangibleAssets
Finite Lived Intangible Assets Accumulated Amortization
AccountsReceivable
Allowance For Doubtful Accounts Receivable Current

Tables

  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
us-gaap:CommonStockValue ▄▄▄▄▄▄▄▄▄0.0020.0020.0020.0020.0020.0020.0020.0020.002NA0.001NANA
 us-gaap:CommonStockSharesIssued us-gaap:StatementClassOfStock us-gaap:CommonClassA███▇▇▅▅▁▁106.3104.9103.495.590.371.860.95469413.10219112.995158NA0.0NANA
 us-gaap:CommonStockSharesIssued us-gaap:StatementClassOfStock us-gaap:CommonClassB▁▁▁▁▁▂▃██9.79.910.211.414.724.233.86302180.48563980.433917NA25.026001NANA
 us-gaap:CommonStockSharesOutstanding us-gaap:StatementClassOfStock us-gaap:CommonClassA███▇▇▅▅▁▁106.3104.9103.495.590.371.860.95469413.10219112.995158NA0.0NANA
 us-gaap:CommonStockSharesOutstanding us-gaap:StatementClassOfStock us-gaap:CommonClassB▁▁▁▁▁▂▃██9.79.910.211.414.724.233.86302180.24489980.433917NA25.026001NANA
us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding 115.326NANANA99.835NANANANANANANANA
us-gaap:WeightedAverageNumberOfSharesOutstandingBasic 115.326NANANA99.835NANANANANANANANA
us-gaap:WeightedAverageNumberOfShareOutstandingBasicAndDiluted NA114.134NA105.94299.83595.401NA93.2459.78125.29NA24.52924.127
 us-gaap:WeightedAverageNumberOfShareOutstandingBasicAndDiluted us-gaap:StatementClassOfStock us-gaap:CommonClassANA104.002NA92.5180.05665.21NA13.0546.464NANANANA
 us-gaap:WeightedAverageNumberOfShareOutstandingBasicAndDiluted us-gaap:StatementClassOfStock us-gaap:CommonClassBNA10.132NA13.43219.77930.191NA80.18653.31725.29NA24.52924.127
us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount NA20.859NANANA13.422NANANA62.482NANANA
 us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecurities fsly:EarlyExerciseOfStockOptionsNA0.077NANANA0.163NANANA0.26NANANA
 us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecurities fsly:RevestSharesNA0.672NANANANANANANANANANANA
 us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecurities us-gaap:ConvertibleDebtSecuritiesNA9.229NANANANANANANANANANANA
 us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecurities us-gaap:EmployeeStockNA0.092NANANA0.185NANANA0.0NANANA
 us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecurities us-gaap:EmployeeStockOptionNA6.28NANANA10.101NANANA8.073NANANA
 us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecurities us-gaap:PerformanceSharesNA0.128NANANA0.088NANANA0.0NANANA
 us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecurities us-gaap:RestrictedStockUnitsRSUNA4.381NANANA2.702NANANA0.0NANANA
us-gaap:EarningsPerShareBasic -0.51NANANA-0.14NANANANANANANANA
us-gaap:EarningsPerShareDiluted -0.51NANANA-0.14NANANANANANANANA
us-gaap:EarningsPerShareBasicAndDiluted NA-0.44-0.43000000000000005-0.22-0.14-0.13-0.12-0.13-0.26-0.38-0.29000000000000004-0.35-0.24
 us-gaap:EarningsPerShareBasicAndDiluted us-gaap:StatementClassOfStock us-gaap:CommonClassANA-0.44-0.43000000000000005-0.22-0.14-0.13-0.12-0.13-0.26NANANANA
 us-gaap:EarningsPerShareBasicAndDiluted us-gaap:StatementClassOfStock us-gaap:CommonClassBNA-0.44-0.43000000000000005-0.22-0.14-0.13-0.12-0.13-0.26-0.38-0.29000000000000004-0.35-0.24
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
us-gaap:AllocatedShareBasedCompensationExpense █▇▇▃▄▂▂▂▁▁▁▁▁33.42630.83829.68112.14216.2816.3294.5953.842.2431.4671.280.9610.99
us-gaap:ComprehensiveIncomeNetOfTax ▁▂▃▆▇▇▇▇▇▇███-58.419-50.826-45.822-24.039-14.762-11.499-13.855-12.198-15.594-9.671-7.31-8.517-5.874
us-gaap:CostOfRevenue █▇▆▅▅▄▄▃▂▂▂▁▁40.3237.49433.75329.29229.69727.26525.52822.29220.78419.71817.70916.71115.695
us-gaap:GeneralAndAdministrativeExpense ▆▆█▄▃▃▂▂▂▂▂▁▁35.49433.46145.88523.96118.06914.16912.89610.5838.928.77.3536.2654.13
us-gaap:GrossProfit ▇██▆▇▅▄▃▃▃▂▁▁44.70647.35848.89641.34644.96635.65933.40827.50525.38925.83823.08820.10918.753
us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments ▁▂▁▆▇▇▇▇▇▇███-58.45-50.514-58.315-23.442-14.484-11.171-13.764-12.117-15.505-9.672-7.265-8.436-5.801
us-gaap:IncomeTaxExpenseBenefit ▇█▁██████████-0.1550.169-12.6110.336-0.0240.8190.3090.0460.0820.0550.0410.0510.035
us-gaap:IncomeTaxesPaidNet ▂▂▃▂▂█▄▂▂▂▁▂0.110.0650.2190.090.0960.8140.3480.00.0110.002-0.0630.07NA
us-gaap:InterestExpense ▄▂▁▁▁▁▁▂█▃▂▁▁1.4360.6610.4520.410.3710.3160.3910.6212.9891.2350.5910.4790.359
us-gaap:InterestExpenseDebt 1.0NA-0.20.40.40.30.40.63.01.20.70.50.4
us-gaap:InterestPaidNet ▂▁▃▂▁▁▂▂█▄▂▂0.4040.3550.8320.410.1930.1550.4910.4962.9891.4460.5160.379NA
us-gaap:NetIncomeLoss ▁▂▃▆▇▇▇▇▇▇███-58.295-50.683-45.704-23.778-14.46-11.99-14.073-12.163-15.587-9.727-7.306-8.487-5.836
 us-gaap:NetIncomeLoss us-gaap:BusinessAcquisition fsly:SignalSciencesCorpNANA-23.0NANANANANANANANANANA
 us-gaap:NetIncomeLoss us-gaap:StatementEquityComponents us-gaap:RetainedEarnings▁▂▃▆▇▇▇▇▇▇███-58.295-50.683-45.704-23.778-14.46-11.99-14.073-12.163-15.587-9.727-7.306-8.487-5.836
us-gaap:OperatingExpenses █▇█▄▄▃▃▂▂▂▂▁▁102.17497.321106.2464.859.40447.63547.43940.26437.0733.91530.14727.82924.202
us-gaap:OperatingIncomeLoss ▁▂▁▆▇▇▇▇▇████-57.468-49.963-57.344-23.454-14.438-11.976-14.031-12.759-11.681-8.077-7.059-7.72-5.449
us-gaap:OtherNonoperatingIncomeExpense ▇▆▄▇▆█▆▇▁▄▇▅▆0.178-0.064-0.6970.069-0.0530.402-0.1980.109-1.696-0.7760.023-0.53-0.14
us-gaap:ResearchAndDevelopmentExpense ██▇▄▄▃▃▂▂▂▁▁▁30.34628.98825.5918.27116.65514.29812.95112.12111.24410.1769.3079.2338.099
us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax ███▆▇▅▄▃▃▃▂▁▁85.02684.85282.64970.63874.66362.92458.93649.79746.17345.55640.79736.8234.448
us-gaap:SellingAndMarketingExpense ███▄▅▃▄▃▂▂▁▁▁36.33434.87234.76522.56824.6819.16821.59217.5616.90615.03913.48712.33111.973
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
us-gaap:Assets ██▄▂▂▁▁▁▁2136.8712138.2941219.951631.518607.864323.846320.969327.32356.376NA162.754NANA
us-gaap:Liabilities ██▂▁▁▁▁▁▁1107.7811093.26158.08696.39865.69967.79663.31767.90589.054NA75.097NANA
us-gaap:LiabilitiesAndStockholdersEquity ██▄▂▂▁▁▁▁2136.8712138.2941219.951631.518607.864323.846320.969327.32356.376NA162.754NANA
us-gaap:StockholdersEquity ███▅▅▃▃▃▃▁▁▁▁1029.091045.0341061.865535.12542.165256.05257.652259.415267.322-133.598-131.927-126.61-119.506
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
us-gaap:AssetsCurrent ▇█▁▃▃▁▁▁▁1008.1041167.434261.256529.719525.417241.828249.323255.932286.353NA117.267NANA
us-gaap:CashAndCashEquivalentsAtCarryingValue ▆█▁▃▃▁▁▁▂▁▁▁▁687.986948.78362.9309.968257.41822.50116.14254.706213.46321.35536.96321.28161.433
us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents ▆█▁▄▃▂▁▁▂▁▁▁▁688.966949.76363.88380.055327.50592.58886.22954.793213.5521.35536.96321.28161.433
us-gaap:ShortTermInvestments NA147.793131.28392.302126.60794.084114.967153.098NANA46.679NANA
 us-gaap:ShortTermInvestments us-gaap:FinancialInstrument us-gaap:CommercialPaperNANANA17.46447.8412.4985.48119.608NANA20.086NANA
 us-gaap:ShortTermInvestments us-gaap:FinancialInstrument us-gaap:CorporateDebtSecuritiesNANANA14.39117.4489.02417.4729.587NANA12.852NANA
 us-gaap:ShortTermInvestments us-gaap:FinancialInstrument us-gaap:USTreasurySecuritiesNANANA60.44750.43968.71378.1690.06NANA5.932NANA
us-gaap:MarketableSecuritiesCurrent NA29.9320.448NANANANANANANANANANA
us-gaap:AccountsReceivableNetCurrent ▇▇▆▄█▄▃▂▁56.06552.36350.25842.59358.33143.01737.13633.90528.542NA24.729NANA
us-gaap:PrepaidExpenseAndOtherAssetsCurrent █▆▅▃▂▂▁▃▂22.22218.40816.72814.76912.97412.13910.99114.22312.192NA8.896NANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
us-gaap:PropertyPlantAndEquipmentGross █▆▅▅▃▃▂▁▁190.849166.059157.632144.982122.831121.752108.276102.75197.909NA77.975NANA
us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment █▆▅▅▄▃▂▂▁74.37867.45161.65361.48456.99552.68348.23946.11142.299NA35.621NANA
us-gaap:AmortizationOfIntangibleAssets ███▁▁▁▁▁▁▁▁▁▁5.35.3635.20.10.10.10.01620.03620.02630.10.03610.02130.0213
us-gaap:PropertyPlantAndEquipmentNet █▆▆▄▂▃▂▁▁116.47198.60895.97983.49865.83669.06960.03756.6455.61NA42.354NANA
us-gaap:Goodwill ███▁▁▁▁▁▁635.646635.645635.590.3620.3470.3480.3720.3480.359NA0.36NANA
 us-gaap:IndefiniteLivedIntangibleAssetsExcludingGoodwill us-gaap:FiniteLivedIntangibleAssetsByMajorClass us-gaap:DevelopedTechnologyRightsNANANA0.3680.368NA0.0NANANANANANA
us-gaap:IntangibleAssetsNetExcludingGoodwill ███▁▁▁▁▁▁113.215116.379121.7422.7922.8641.0891.1251.1611.198NA0.61NANA
us-gaap:FiniteLivedIntangibleAssetsNet ███▁▁▁▁▁▁112.847116.011121.3742.4242.4961.0891.1251.1611.198NA0.61NANA
us-gaap:OperatingLeaseRightOfUseAsset ▇█▁62.6363.30560.019NANANANANANANANANANA
us-gaap:OtherAssetsNoncurrent ▄█▆▂▁▁▁▁▁27.57856.92345.36515.14713.411.51210.11213.23912.856NA2.163NANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
us-gaap:AccountsPayableCurrent ▆█▅█▂▅▁▃▂10.20212.0199.1512.2736.0879.4574.6026.7965.753NA2.333NANA
us-gaap:AccruedLiabilitiesCurrent ▄▇▆█▂▁▁▂▃28.60936.3234.33438.55922.63120.21819.87823.46525.101NA15.535NANA
us-gaap:ContractWithCustomerLiabilityCurrent █▇▆▁▁▁▁22.66718.17115.9160.0420.0480.8520.317NANANA1.622NANA
us-gaap:LiabilitiesCurrent █▇▇▄▁▁▁▂▄103.03298.29694.08966.44738.30840.39637.12145.37765.265NA31.75NANA
us-gaap:LongTermDebtCurrent NANANA6.065.1885.2914.47213.50532.822NA11.37NANA
us-gaap:OperatingLeaseLiabilityCurrent ▁█▅19.71320.01119.895NANANANANANANANANANA
us-gaap:OtherAccruedLiabilitiesCurrent █▆▄▂▅▂▃▁█6.055.3244.3683.5514.6043.5333.9692.9536.082NA5.457NANA
us-gaap:OtherLiabilitiesCurrent █▅▅▃▂▂▃▁▁29.73519.03619.6779.5554.4025.438.1691.6111.589NA2.512NANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
 us-gaap:LongTermDebt us-gaap:DebtInstrument,us-gaap:LongtermDebtType fsly:A2026ConvertibleNotes,us-gaap:ConvertibleDebt█▁931.385930.291NANANANANANANANANANANA
us-gaap:LongTermDebtNoncurrent █▁931.385930.291NA26.00724.85826.04325.15815.54517.878NA39.439NANA
us-gaap:LongTermDebtAndCapitalLeaseObligations NANANA35.738NANA25.158NANANA39.439NANA
us-gaap:OtherLiabilitiesNoncurrent ▇▄▅▄▃▁▁█▇6.5023.524.43.9442.5331.3571.0386.9835.911NA0.647NANA
us-gaap:OperatingLeaseLiabilityNoncurrent ▇█▁47.17747.50544.89NANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo ▄▁█13.94111.3317.01NANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree █▁▄12.3749.34310.706NANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour █▃▁11.8648.9157.965NANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive NANA7.416NANANANANANANANANANA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive NANA9.888NANANANANANANANANANA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
us-gaap:StockholdersEquity ███▅▅▃▃▃▃▁▁▁▁1029.091045.0341061.865535.12542.165256.05257.652259.415267.322-133.598-131.927-126.61-119.506
us-gaap:CommonStockValue ▄▄▄▄▄▄▄▄▄0.0020.0020.0020.0020.0020.0020.0020.0020.002NA0.001NANA
us-gaap:AdditionalPaidInCapital ██▇▃▃▁▁▁▁1426.521384.0451350.05777.231760.237459.36449.463439.48435.189NA16.403NANA
us-gaap:RetainedEarningsAccumulatedDeficit ▁▃▄▆▆▇▇██-397.171-338.876-288.193-242.237-218.459-203.999-192.009-177.936-165.773NA-146.186NANA
us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax ▁▂▃▄▆█▄▃▃-0.261-0.1370.0060.1240.3850.6870.196-0.0220.013NA-0.036NANA
us-gaap:StockIssuedDuringPeriodValueNewIssues NANA0.00.0274.177NA0.00.0186.912NANANANA
 us-gaap:StockIssuedDuringPeriodValueNewIssues us-gaap:StatementEquityComponents us-gaap:AdditionalPaidInCapitalNANA0.00.0274.177NA0.00.0186.912NANANANA
us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue █▇▇▄▄▂▂▂▁▁▁▁▁33.80631.21230.47712.74516.6686.5775.0363.842.2431.4671.280.9610.99
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
us-gaap:NetCashProvidedByUsedInOperatingActivities ▃▃▁█▄▄▄▃▄▄▅▄-17.014-10.869-31.14927.2-8.781-7.186-3.06-12.595-5.565-10.083-0.786-3.615NA
us-gaap:NetCashProvidedByUsedInInvestingActivities ▂▆▁█▆▇█▄▇▇▇▆-244.505-35.399-267.43520.24-37.579.74232.479-125.2648.701-3.594-8.849-37.694NA
us-gaap:NetCashProvidedByUsedInFinancingActivities ▁█▁▁▃▁▁▁▃▁▁▁0.751932.263-17.5815.193281.3613.7661.93-20.909189.05-1.92325.3091.152NA
us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect ▁█▁▃▄▃▃▂▄▃▃▃-260.797885.883-316.17552.55234.9176.35931.436-158.757192.195-15.60815.682-40.152NA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
us-gaap:AmortizationOfFinancingCosts NANA0.1610.020.0190.0190.0250.0681.6570.1590.00.0NA
us-gaap:DepreciationDepletionAndAmortization NANA5.5684.9674.7294.7154.864.0693.93.7383.6823.4233.3
us-gaap:IncreaseDecreaseInAccountsPayable ▂▅▁█▂▆▂▄▅▅▂▆-1.9572.119-2.9875.682-1.7483.112-2.1881.3091.5841.686-1.8942.911NA
us-gaap:IncreaseDecreaseInAccountsReceivable ▅▅▅▁█▆▅▆▄▅▅▅3.9271.6852.595-15.54216.186.0313.2475.638-0.7044.5861.7921.067NA
us-gaap:NetCashProvidedByUsedInOperatingActivities ▃▃▁█▄▄▄▃▄▄▅▄-17.014-10.869-31.14927.2-8.781-7.186-3.06-12.595-5.565-10.083-0.786-3.615NA
us-gaap:NetIncomeLoss ▁▂▃▆▇▇▇▇▇▇███-58.295-50.683-45.704-23.778-14.46-11.99-14.073-12.163-15.587-9.727-7.306-8.487-5.836
 us-gaap:NetIncomeLoss us-gaap:BusinessAcquisition fsly:SignalSciencesCorpNANA-23.0NANANANANANANANANANA
 us-gaap:NetIncomeLoss us-gaap:StatementEquityComponents us-gaap:RetainedEarnings▁▂▃▆▇▇▇▇▇▇███-58.295-50.683-45.704-23.778-14.46-11.99-14.073-12.163-15.587-9.727-7.306-8.487-5.836
us-gaap:ShareBasedCompensation █▇▇▃▄▂▂▂▁▁▁▁33.42630.83829.68112.14216.2816.3294.5953.842.2431.4671.280.961NA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
us-gaap:NetCashProvidedByUsedInInvestingActivities ▂▆▁█▆▇█▄▇▇▇▆-244.505-35.399-267.43520.24-37.579.74232.479-125.2648.701-3.594-8.849-37.694NA
us-gaap:PaymentsToAcquirePropertyPlantAndEquipment ▃▆▄█▂▇▃▂▄▃▅▁2.9348.0795.12611.8932.32910.2214.2091.1715.2044.0256.8630.005NA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
us-gaap:NetCashProvidedByUsedInFinancingActivities ▁█▁▁▃▁▁▁▃▁▁▁0.751932.263-17.5815.193281.3613.7661.93-20.909189.05-1.92325.3091.152NA
  2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30

Common Stock Value

us-gaap:CommonStockValue

us-gaap:CommonStockValue


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value2000.02000.02000.02000.02000.02000.02000.02000.02000.01000.0
Percentage of CommonStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.0

Common Stock Shares Issued

us-gaap:CommonStockSharesIssued us-gaap:StatementClassOfStock

us-gaap:CommonStockSharesIssued

us-gaap:CommonClassA


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value1061041039590716013120.0
Percentage of CommonStockSharesIssued100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

us-gaap:CommonClassB


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value9.79.91011142433808025
Percentage of CommonStockSharesIssued9.19.49.911.916.333.755.6614.3619.00.0

Common Stock Shares Outstanding

us-gaap:CommonStockSharesOutstanding us-gaap:StatementClassOfStock

us-gaap:CommonStockSharesOutstanding

us-gaap:CommonClassA


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value1061041039590716013120.0
Percentage of CommonStockSharesOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

us-gaap:CommonClassB


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value9.79.91011142433808025
Percentage of CommonStockSharesOutstanding9.19.49.911.916.333.755.6612.5619.00.0

Weighted Average Number Of Diluted Shares Outstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding


Weighted
Period End2021-06-302020-06-30
Value11599
Percentage of WeightedAverageNumberOfDilutedSharesOutstanding100.0100.0

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding us-gaap:StatementClassOfStock

us-gaap:CommonClassA


Weighted
Period End2021-06-302020-06-30
Value10580
Percentage of WeightedAverageNumberOfDilutedSharesOutstanding91.580.2

us-gaap:CommonClassB


Weighted
Period End2021-06-302020-06-30
Value9.80419
Percentage of WeightedAverageNumberOfDilutedSharesOutstanding8.519.8

Weighted Average Number Of Shares Outstanding Basic

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic


Weighted
Period End2021-06-302020-06-30
Value11599
Percentage of WeightedAverageNumberOfSharesOutstandingBasic100.0100.0

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic us-gaap:StatementClassOfStock

us-gaap:CommonClassA


Weighted
Period End2021-06-302020-06-30
Value10580
Percentage of WeightedAverageNumberOfSharesOutstandingBasic91.580.2

us-gaap:CommonClassB


Weighted
Period End2021-06-302020-06-30
Value9.80419
Percentage of WeightedAverageNumberOfSharesOutstandingBasic8.519.8

Weighted Average Number Of Share Outstanding Basic And Diluted

us-gaap:WeightedAverageNumberOfShareOutstandingBasicAndDiluted

us-gaap:WeightedAverageNumberOfShareOutstandingBasicAndDiluted


Weighted
Period End2021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-30
Value11410599959359252424
Percentage of WeightedAverageNumberOfShareOutstandingBasicAndDiluted100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:WeightedAverageNumberOfShareOutstandingBasicAndDiluted us-gaap:StatementClassOfStock

us-gaap:CommonClassA


Weighted
Period End2021-03-312020-09-302020-06-302020-03-312019-09-302019-06-30
Value104928065136.464
Percentage of WeightedAverageNumberOfShareOutstandingBasicAndDiluted91.187.380.268.414.010.8

us-gaap:CommonClassB


Weighted
Period End2021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-302018-06-30
Value101319308053252424
Percentage of WeightedAverageNumberOfShareOutstandingBasicAndDiluted8.912.719.831.686.089.2100.0100.0100.0

Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount


Antidilutive
Period End2021-03-312020-03-312019-03-31
Value201362
Percentage of AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount100.0100.0100.0

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecurities

fsly:EarlyExerciseOfStockOptions


Antidilutive
Period End2021-03-312020-03-312019-03-31
Value0.0770.1630.26
Percentage of AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount0.41.20.4

fsly:RevestShares


Antidilutive
Period End2021-03-31
Value0.672
Percentage of AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount3.2

us-gaap:ConvertibleDebtSecurities


Antidilutive
Period End2021-03-31
Value9.229
Percentage of AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount44.2

us-gaap:EmployeeStock


Antidilutive
Period End2021-03-312020-03-312019-03-31
Value0.0920.1850.0
Percentage of AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount0.41.40.0

us-gaap:EmployeeStockOption


Antidilutive
Period End2021-03-312020-03-312019-03-31
Value6.28108.073
Percentage of AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount30.175.312.9

us-gaap:PerformanceShares


Antidilutive
Period End2021-03-312020-03-312019-03-31
Value0.1280.0880.0
Percentage of AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount0.60.70.0

us-gaap:RestrictedStockUnitsRSU


Antidilutive
Period End2021-03-312020-03-312019-03-31
Value4.3812.7020.0
Percentage of AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount21.020.10.0

Earnings Per Share Basic

us-gaap:EarningsPerShareBasic

us-gaap:EarningsPerShareBasic


Earnings
Period End2021-06-302020-06-30
Value-0.51-0.14
Percentage of EarningsPerShareBasic100.0100.0

us-gaap:EarningsPerShareBasic us-gaap:StatementClassOfStock

us-gaap:CommonClassA


Earnings
Period End2021-06-302020-06-30
Value-0.51-0.14
Percentage of EarningsPerShareBasic100.0100.0

us-gaap:CommonClassB


Earnings
Period End2021-06-302020-06-30
Value-0.51-0.14
Percentage of EarningsPerShareBasic100.0100.0

Earnings Per Share Diluted

us-gaap:EarningsPerShareDiluted

us-gaap:EarningsPerShareDiluted


Earnings
Period End2021-06-302020-06-30
Value-0.51-0.14
Percentage of EarningsPerShareDiluted100.0100.0

us-gaap:EarningsPerShareDiluted us-gaap:StatementClassOfStock

us-gaap:CommonClassA


Earnings
Period End2021-06-302020-06-30
Value-0.51-0.14
Percentage of EarningsPerShareDiluted100.0100.0

us-gaap:CommonClassB


Earnings
Period End2021-06-302020-06-30
Value-0.51-0.14
Percentage of EarningsPerShareDiluted100.0100.0

Earnings Per Share Basic And Diluted

us-gaap:EarningsPerShareBasicAndDiluted

us-gaap:EarningsPerShareBasicAndDiluted


Earnings
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value-0.44-0.43-0.22-0.14-0.13-0.12-0.13-0.26-0.38-0.29-0.35-0.24
Percentage of EarningsPerShareBasicAndDiluted100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EarningsPerShareBasicAndDiluted us-gaap:StatementClassOfStock

us-gaap:CommonClassA


Earnings
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
Value-0.44-0.43-0.22-0.14-0.13-0.12-0.13-0.26
Percentage of EarningsPerShareBasicAndDiluted100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CommonClassB


Earnings
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value-0.44-0.43-0.22-0.14-0.13-0.12-0.13-0.26-0.38-0.29-0.35-0.24
Percentage of EarningsPerShareBasicAndDiluted100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Allocated Share Based Compensation Expense

us-gaap:AllocatedShareBasedCompensationExpense

us-gaap:AllocatedShareBasedCompensationExpense


Allocated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value33302912166.3294.5953.842.2431.4671.280.9610.99
Percentage of AllocatedShareBasedCompensationExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax39.336.335.917.221.810.17.87.74.93.23.12.62.9

us-gaap:AllocatedShareBasedCompensationExpense us-gaap:AwardType

us-gaap:EmployeeStock


Allocated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value0.91.20.90.41.30.71.01.10.40.00.00.0
Percentage of AllocatedShareBasedCompensationExpense2.73.93.03.38.011.121.828.617.80.00.00.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax1.11.41.10.61.71.11.72.20.90.00.00.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:EmployeeStock0.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:EmployeeStockOption


Allocated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value4.43.74.41.82.01.87.92.11.91.54.11.01.0
Percentage of AllocatedShareBasedCompensationExpense13.212.014.814.812.328.4171.954.784.7102.2320.3104.1101.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax5.24.45.32.52.72.913.44.24.13.310.02.72.9
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:EmployeeStockOption0.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RestrictedStockUnitsRSU


Allocated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-312018-09-30
Value15131210134.11.50.70.00.0
Percentage of AllocatedShareBasedCompensationExpense47.342.842.187.382.364.832.618.20.00.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax18.615.615.115.017.96.52.51.40.00.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:RestrictedStockUnitsRSU0.00.00.00.00.00.00.00.00.00.0

us-gaap:AllocatedShareBasedCompensationExpense us-gaap:IncomeStatementLocation

us-gaap:CostOfSales


Allocated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value1.8281.1861.2550.9291.090.6150.5350.4380.2930.1440.0870.0550.071
Percentage of AllocatedShareBasedCompensationExpense5.53.84.27.76.79.711.611.413.19.86.85.77.2
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax2.11.41.51.31.51.00.90.90.60.30.20.10.2
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:CostOfSales0.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:GeneralAndAdministrativeExpense


Allocated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value1716163.6484.0622.561.6511.5050.640.5220.4380.3570.369
Percentage of AllocatedShareBasedCompensationExpense51.954.154.430.024.940.435.939.228.535.634.237.137.3
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax20.419.719.55.25.44.12.83.01.41.11.11.01.1
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:GeneralAndAdministrativeExpense0.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:ResearchAndDevelopmentExpense


Allocated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value8.6347.9587.0174.3714.0531.6710.8060.9680.7140.4320.4250.3070.324
Percentage of AllocatedShareBasedCompensationExpense25.825.823.636.024.926.417.525.231.829.433.231.932.7
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax10.29.48.56.25.42.71.41.91.50.91.00.80.9
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:ResearchAndDevelopmentExpense0.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:SellingAndMarketingExpense


Allocated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value5.6315.0085.2753.1947.0761.4831.6030.9290.5960.3690.330.2420.226
Percentage of AllocatedShareBasedCompensationExpense16.816.217.826.343.523.434.924.226.625.225.825.222.8
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax6.65.96.44.59.52.42.71.91.30.80.80.70.7
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:SellingAndMarketingExpense0.00.00.00.00.00.00.00.00.00.00.00.00.0

Comprehensive Income Net Of Tax

us-gaap:ComprehensiveIncomeNetOfTax

us-gaap:ComprehensiveIncomeNetOfTax


Comprehensive
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value-58419000.0-50826000.0-45822000.0-24039000.0-14762000.0-11499000.0-13855000.0-12198000.0-15594000.0-9671000.0-7310000.0-8517000.0-5874000.0
Percentage of ComprehensiveIncomeNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax-68.7-59.9-55.4-34.0-19.8-18.3-23.5-24.5-33.8-21.2-17.9-23.1-17.1

Cost Of Revenue

us-gaap:CostOfRevenue

us-gaap:CostOfRevenue


Cost
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value40373329292725222019171615
Percentage of CostOfRevenue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax47.444.240.841.539.843.343.344.845.043.343.445.445.6

General And Administrative Expense

us-gaap:GeneralAndAdministrativeExpense

us-gaap:GeneralAndAdministrativeExpense


General
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value35334523181412108.928.77.3536.2654.13
Percentage of GeneralAndAdministrativeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax41.739.455.533.924.222.521.921.319.319.118.017.012.0

Gross Profit

us-gaap:GrossProfit

us-gaap:GrossProfit


Gross
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value44474841443533272525232018
Percentage of GrossProfit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax52.655.859.258.560.256.756.755.255.056.756.654.654.4

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 End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value-58450000.0-50514000.0-58315000.0-23442000.0-14484000.0-11171000.0-13764000.0-12117000.0-15505000.0-9672000.0-7265000.0-8436000.0-5801000.0
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax-68.7-59.5-70.6-33.2-19.4-17.8-23.4-24.3-33.6-21.2-17.8-22.9-16.8

Income Tax Expense Benefit

us-gaap:IncomeTaxExpenseBenefit

us-gaap:IncomeTaxExpenseBenefit


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value-155000.0169000.0-12611000.0336000.0-24000.0819000.0309000.046000.082000.055000.041000.051000.035000.0
Percentage of IncomeTaxExpenseBenefit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax-0.20.2-15.30.5-0.01.30.50.10.20.10.10.10.1

Income Taxes Paid Net

us-gaap:IncomeTaxesPaidNet

us-gaap:IncomeTaxesPaidNet


Income
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value110000.065000.0219000.090000.096000.0814000.0348000.0011000.02000.0-63000.070000.0
Percentage of IncomeTaxesPaidNet100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.10.10.30.10.11.30.60.00.00.0-0.20.2

Interest Expense

us-gaap:InterestExpense

us-gaap:InterestExpense


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value1436000.0661000.0452000.0410000.0371000.0316000.0391000.0621000.02989000.01235000.0591000.0479000.0359000.0
Percentage of InterestExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax1.70.80.50.60.50.50.71.26.52.71.41.31.0

Interest Expense Debt

us-gaap:InterestExpenseDebt

us-gaap:InterestExpenseDebt


Interest
Period End2021-06-302020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value1000000.0-200000.0400000.0400000.0300000.0400000.0600000.03000000.01200000.0700000.0500000.0400000.0
Percentage of InterestExpenseDebt100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax1.2-0.20.60.50.50.71.26.52.61.71.41.2

Interest Paid Net

us-gaap:InterestPaidNet

us-gaap:InterestPaidNet


Interest
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value404000.0355000.0832000.0410000.0193000.0155000.0491000.0496000.02989000.01446000.0516000.0379000.0
Percentage of InterestPaidNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.50.41.00.60.30.20.81.06.53.21.31.0

Net Income Loss

us-gaap:NetIncomeLoss

us-gaap:NetIncomeLoss


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value-58295000.0-50683000.0-45704000.0-23778000.0-14460000.0-11990000.0-14073000.0-12163000.0-15587000.0-9727000.0-7306000.0-8487000.0-5836000.0
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax-68.6-59.7-55.3-33.7-19.4-19.1-23.9-24.4-33.8-21.4-17.9-23.0-16.9

us-gaap:NetIncomeLoss us-gaap:BusinessAcquisition

fsly:SignalSciencesCorp


Net
Period End2020-12-31
Value-23000000.0
Percentage of NetIncomeLoss50.3
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax-27.8
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax fsly:SignalSciencesCorp-343.3

us-gaap:NetIncomeLoss us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value-58295000.0-50683000.0-45704000.0-23778000.0-14460000.0-11990000.0-14073000.0-12163000.0-15587000.0-9727000.0-7306000.0-8487000.0-5836000.0
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax-68.6-59.7-55.3-33.7-19.4-19.1-23.9-24.4-33.8-21.4-17.9-23.0-16.9
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.0

Net Income Loss Available To Common Stockholders Basic

us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic us-gaap:StatementClassOfStock

us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic

us-gaap:CommonClassA


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
Value-53339000.0-46184000.0-38444000.0-20763000.0-11595000.0-8196000.0-7968000.0-1703000.0-1685000.0
Percentage of NetIncomeLossAvailableToCommonStockholdersBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax-62.7-54.4-46.5-29.4-15.5-13.0-13.5-3.4-3.6
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:CommonClassA0.00.00.00.00.00.00.00.00.0

us-gaap:CommonClassB


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value-4956000.0-4499000.0-7260000.0-3015000.0-2685000.0-3794000.0-6105000.0-10460000.0-13902000.0-9727000.0-7306000.0-8487000.0-5836000.0
Percentage of NetIncomeLossAvailableToCommonStockholdersBasic9.39.718.914.523.246.376.6614.2825.00.00.00.00.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax-5.8-5.3-8.8-4.3-3.6-6.0-10.4-21.0-30.1-21.4-17.9-23.0-16.9
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:CommonClassB0.00.00.00.00.00.00.00.00.00.00.00.00.0

Operating Expenses

us-gaap:OperatingExpenses

us-gaap:OperatingExpenses


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value1029710664594747403733302724
Percentage of OperatingExpenses100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax120.2114.7128.591.779.675.780.580.980.374.473.975.670.3

Operating Income Loss

us-gaap:OperatingIncomeLoss

us-gaap:OperatingIncomeLoss


Operating
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value-57468000.0-49963000.0-57344000.0-23454000.0-14438000.0-11976000.0-14031000.0-12759000.0-11681000.0-8077000.0-7059000.0-7720000.0-5449000.0
Percentage of OperatingIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax-67.6-58.9-69.4-33.2-19.3-19.0-23.8-25.6-25.3-17.7-17.3-21.0-15.8

Other Nonoperating Income Expense

us-gaap:OtherNonoperatingIncomeExpense

us-gaap:OtherNonoperatingIncomeExpense


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value178000.0-64000.0-697000.069000.0-53000.0402000.0-198000.0109000.0-1696000.0-776000.023000.0-530000.0-140000.0
Percentage of OtherNonoperatingIncomeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.2-0.1-0.80.1-0.10.6-0.30.2-3.7-1.70.1-1.4-0.4

Research And Development Expense

us-gaap:ResearchAndDevelopmentExpense

us-gaap:ResearchAndDevelopmentExpense


Research
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value302825181614121211109.3079.2338.099
Percentage of ResearchAndDevelopmentExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax35.734.231.025.922.322.722.024.324.422.322.825.123.5

Revenue From Contract With Customer Including Assessed Tax

us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax

us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value85848270746258494645403634
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:BusinessAcquisition

fsly:SignalSciencesCorp


Revenue
Period End2020-12-31
Value6.7
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax8.1
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax8.1
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax fsly:SignalSciencesCorp100.0

us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:MajorCustomers

fsly:EnterpriseCustomers


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value7475696367551744239391213027
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax87.588.984.789.790.288.7296.885.985.485.7298.283.180.9
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax87.588.984.789.790.288.7296.885.985.485.7298.283.180.9
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax fsly:EnterpriseCustomers100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

fsly:NonenterpriseCustomers


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value109.387127.2857.3337.118257.0326.7526.512226.2236.576
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax12.511.115.310.39.811.343.314.114.614.356.216.919.1
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax12.511.115.310.39.811.343.314.114.614.356.216.919.1
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax fsly:NonenterpriseCustomers100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:StatementGeographical

country:US


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value59626049464141353233302826
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax70.273.973.069.661.765.270.371.270.473.474.476.678.1
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax70.273.973.069.661.765.270.371.270.473.474.476.678.1
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax country:US100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

fsly:AllOtherCountries


Revenue
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-30
Value8.0433.3243.1896.5674.2972.6092.753
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax9.53.94.58.86.85.26.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax9.53.94.58.86.85.26.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax fsly:AllOtherCountries100.0100.0100.0100.0100.0100.0100.0

srt:AsiaPacific


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
Value9.0779.1549.90310149.8456.0594.6074.462
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax10.710.812.014.618.815.610.39.39.7
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax10.710.812.014.618.815.610.39.39.7
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax srt:AsiaPacific100.0100.0100.0100.0100.0100.0100.0100.0100.0

srt:Europe


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
Value8.2329.649.2198.0037.9937.7747.7057.1086.437
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax9.711.411.211.310.712.413.114.313.9
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax9.711.411.211.310.712.413.114.313.9
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax srt:Europe100.0100.0100.0100.0100.0100.0100.0100.0100.0

Selling And Marketing Expense

us-gaap:SellingAndMarketingExpense

us-gaap:SellingAndMarketingExpense


Selling
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value36343422241921171615131211
Percentage of SellingAndMarketingExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax42.741.142.131.933.130.536.635.336.633.033.133.534.8

Assets

us-gaap:Assets

us-gaap:Assets


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value213621381219631607323320327356162
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Liabilities

us-gaap:Liabilities

us-gaap:Liabilities


Liabilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value1107109315896656763678975
Percentage of Liabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets51.851.113.015.310.820.919.720.725.046.1

Liabilities And Stockholders Equity

us-gaap:LiabilitiesAndStockholdersEquity

us-gaap:LiabilitiesAndStockholdersEquity


Liabilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value213621381219631607323320327356162
Percentage of LiabilitiesAndStockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Stockholders Equity

us-gaap:StockholdersEquity

us-gaap:StockholdersEquity


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-31
Value102910451061535542256257259267-133.598-131.927-126.61-119.506-115.189-107.006-78.249
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets48.248.987.084.789.279.180.379.375.00.0-81.10.00.00.00.00.0

us-gaap:StockholdersEquity us-gaap:StatementClassOfStock, us-gaap:StatementEquityComponents

us-gaap:CommonClassA, us-gaap:CommonStock


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-312016-12-31
Value0.0010.0010.0010.0010.0010.0010.0010.00.00.00.00.00.0
Percentage of StockholdersEquity0.00.00.00.00.00.00.00.00.0-0.0-0.0-0.0-0.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:CommonClassA us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CommonClassB, us-gaap:CommonStock


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-312016-12-31
Value0.0010.0010.0010.0010.0010.0010.0010.0020.0020.0010.0010.0010.001
Percentage of StockholdersEquity0.00.00.00.00.00.00.00.00.0-0.0-0.0-0.0-0.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:CommonClassB us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:StockholdersEquity us-gaap:StatementEquityComponents

us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss


Stockholders
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value0.0420.097-0.024-0.013-0.006
Percentage of StockholdersEquity0.00.00.00.00.0
Percentage of Assets0.00.0-0.00.00.0
Percentage of Assets us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss0.00.00.00.00.0

us-gaap:AccumulatedOtherComprehensiveIncome


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-31
Value-0.261-0.1370.0060.1240.3850.6870.196-0.0220.0130.02-0.036-0.032-0.0020.036-0.024-0.049
Percentage of StockholdersEquity-0.0-0.00.00.00.10.30.1-0.00.0-0.00.00.00.0-0.00.00.1
Percentage of Assets-0.0-0.00.00.00.10.20.1-0.00.00.0-0.00.00.00.00.00.0
Percentage of Assets us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedTranslationAdjustment


Stockholders
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value-0.0360.099-0.012-0.011-0.043
Percentage of StockholdersEquity-0.00.00.00.00.1
Percentage of Assets-0.00.0-0.00.00.0
Percentage of Assets us-gaap:AccumulatedTranslationAdjustment0.00.00.00.00.0

us-gaap:AdditionalPaidInCapital


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-31
Value1426138413507777604594494394351816141211106.709
Percentage of StockholdersEquity138.6132.4127.1145.2140.2179.4174.4169.4162.8-14.0-12.4-11.4-10.9-9.9-9.7-8.6
Percentage of Assets66.864.7110.7123.1125.1141.8140.0134.3122.10.010.10.00.00.00.00.0
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-31
Value-397.171-338.876-288.193-242.237-218.459-203.999-192.009-177.936-165.773-150.186-146.186-138.88-130.393-124.557-115.251-82.801
Percentage of StockholdersEquity-38.6-32.4-27.1-45.3-40.3-79.7-74.5-68.6-62.0112.4110.8109.7109.1108.1107.7105.8
Percentage of Assets-18.6-15.8-23.6-38.4-35.9-63.0-59.8-54.4-46.50.0-89.80.00.00.00.00.0
Percentage of Assets us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Assets Current

us-gaap:AssetsCurrent

us-gaap:AssetsCurrent


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value10081167261529525241249255286117
Percentage of AssetsCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets47.254.621.483.986.474.777.778.280.472.1

Cash And Cash Equivalents At Carrying Value

us-gaap:CashAndCashEquivalentsAtCarryingValue

us-gaap:CashAndCashEquivalentsAtCarryingValue


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value687948623092572216542132136216131
Percentage of CashAndCashEquivalentsAtCarryingValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets32.244.45.249.142.36.95.016.759.90.022.70.00.00.0

us-gaap:CashAndCashEquivalentsAtCarryingValue us-gaap:CashAndCashEquivalents

us-gaap:Cash


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value5.7727.94212735.7828.503114.3771.09832
Percentage of CashAndCashEquivalentsAtCarryingValue0.80.833.888.32.237.872.08.00.588.1
Percentage of Assets0.30.41.743.31.02.63.61.30.320.0
Percentage of Assets us-gaap:Cash0.00.00.00.00.00.00.00.00.00.0

us-gaap:CommercialPaper


Cash
Period End2020-12-312020-06-302020-03-312019-12-312018-12-31
Value4.9982.9990.02.4990.0
Percentage of CashAndCashEquivalentsAtCarryingValue7.91.20.015.50.0
Percentage of Assets0.40.50.00.80.0
Percentage of Assets us-gaap:CommercialPaper0.00.00.00.00.0

us-gaap:MoneyMarketFunds


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value6829403636248132.02502122.419
Percentage of CashAndCashEquivalentsAtCarryingValue99.299.258.211.796.662.212.592.099.56.5
Percentage of Assets31.944.03.05.740.94.30.615.459.61.5
Percentage of Assets us-gaap:MoneyMarketFunds0.00.00.00.00.00.00.00.00.00.0

Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-312016-12-31
Value68894963380327928654213213621613117
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets32.244.45.260.253.928.626.916.759.90.022.70.00.00.00.0

Short Term Investments

us-gaap:ShortTermInvestments

us-gaap:ShortTermInvestments


Short
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value147131921269411415346
Percentage of ShortTermInvestments100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets6.910.814.620.829.135.846.828.7

us-gaap:ShortTermInvestments us-gaap:FinancialInstrument

us-gaap:CommercialPaper


Short
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value17472.4985.4811920
Percentage of ShortTermInvestments18.937.82.74.812.843.0
Percentage of Assets2.87.90.81.76.012.3
Percentage of Assets us-gaap:CommercialPaper0.00.00.00.00.00.0

us-gaap:CorporateDebtSecurities


Short
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value14179.024172912
Percentage of ShortTermInvestments15.613.89.615.219.327.5
Percentage of Assets2.32.92.85.49.07.9
Percentage of Assets us-gaap:CorporateDebtSecurities0.00.00.00.00.00.0

us-gaap:USTreasurySecurities


Short
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value60506878905.932
Percentage of ShortTermInvestments65.539.873.068.058.812.7
Percentage of Assets9.68.321.224.427.53.6
Percentage of Assets us-gaap:USTreasurySecurities0.00.00.00.00.00.0

Marketable Securities Current

us-gaap:MarketableSecuritiesCurrent

us-gaap:MarketableSecuritiesCurrent


Marketable
Period End2021-03-312020-12-31
Value2920
Percentage of MarketableSecuritiesCurrent100.0100.0
Percentage of Assets1.41.7

Accounts Receivable Net Current

us-gaap:AccountsReceivableNetCurrent

us-gaap:AccountsReceivableNetCurrent


Accounts
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value56525042584337332824
Percentage of AccountsReceivableNetCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets2.62.44.16.79.613.311.610.48.015.2

Prepaid Expense And Other Assets Current

us-gaap:PrepaidExpenseAndOtherAssetsCurrent

us-gaap:PrepaidExpenseAndOtherAssetsCurrent


Prepaid
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value2218161412121014128.896
Percentage of PrepaidExpenseAndOtherAssetsCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.00.91.42.32.13.73.44.33.45.5

Property Plant And Equipment Gross

us-gaap:PropertyPlantAndEquipmentGross

us-gaap:PropertyPlantAndEquipmentGross


Property
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value1901661571441221211081029777
Percentage of PropertyPlantAndEquipmentGross100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets8.97.812.923.020.237.633.731.427.547.9

us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType

us-gaap:ComputerEquipment


Property
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value15913712912110110189868365
Percentage of PropertyPlantAndEquipmentGross83.882.582.583.582.683.483.084.285.083.4
Percentage of Assets7.56.410.719.216.731.428.026.423.440.0
Percentage of Assets us-gaap:ComputerEquipment0.00.00.00.00.00.00.00.00.00.0

us-gaap:FurnitureAndFixtures


Property
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value1.261.0921.0920.6840.6790.6790.6810.5760.5590.539
Percentage of PropertyPlantAndEquipmentGross0.70.70.70.50.60.60.60.60.60.7
Percentage of Assets0.10.10.10.10.10.20.20.20.20.3
Percentage of Assets us-gaap:FurnitureAndFixtures0.00.00.00.00.00.00.00.00.00.0

us-gaap:LeaseholdImprovements


Property
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value3.8023.8043.8173.3193.3073.2783.2853.2653.2683.259
Percentage of PropertyPlantAndEquipmentGross2.02.32.42.32.72.73.03.23.34.2
Percentage of Assets0.20.20.30.50.51.01.01.00.92.0
Percentage of Assets us-gaap:LeaseholdImprovements0.00.00.00.00.00.00.00.00.00.0

us-gaap:OfficeEquipment


Property
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value0.6540.6580.6590.6620.620.6160.5790.5670.5350.513
Percentage of PropertyPlantAndEquipmentGross0.30.40.40.50.50.50.50.60.50.7
Percentage of Assets0.00.00.10.10.10.20.20.20.20.3
Percentage of Assets us-gaap:OfficeEquipment0.00.00.00.00.00.00.00.00.00.0

us-gaap:SoftwareDevelopment


Property
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value2523221916151311108.604
Percentage of PropertyPlantAndEquipmentGross13.214.114.013.313.612.812.811.510.511.0
Percentage of Assets1.21.11.83.02.84.84.33.62.95.3
Percentage of Assets us-gaap:SoftwareDevelopment0.00.00.00.00.00.00.00.00.00.0

Accumulated Depreciation Depletion And Amortization Property Plant And Equipment

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment


Accumulated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value74676161565248464235
Percentage of AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets3.53.25.19.79.416.315.014.111.921.9

Amortization Of Intangible Assets

us-gaap:AmortizationOfIntangibleAssets

us-gaap:AmortizationOfIntangibleAssets


Amortization
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value5.35.3635.20.10.10.10.01620.03620.02630.10.03610.02130.0213
Percentage of AmortizationOfIntangibleAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.0

Property Plant And Equipment Net

us-gaap:PropertyPlantAndEquipmentNet

us-gaap:PropertyPlantAndEquipmentNet


Property
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value116989583656960565542
Percentage of PropertyPlantAndEquipmentNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets5.54.67.913.210.821.318.717.315.626.0

us-gaap:PropertyPlantAndEquipmentNet us-gaap:PropertyPlantAndEquipmentByType

us-gaap:SoftwareDevelopment


Property
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value15141412109.68.57.06.05.4
Percentage of PropertyPlantAndEquipmentNet13.214.914.814.515.313.914.212.410.812.7
Percentage of Assets0.70.71.21.91.73.02.62.11.73.3
Percentage of Assets us-gaap:SoftwareDevelopment0.00.00.00.00.00.00.00.00.00.0

us-gaap:PropertyPlantAndEquipmentNet us-gaap:StatementGeographical

country:US


Property
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value79646554404340363628
Percentage of PropertyPlantAndEquipmentNet68.665.267.865.662.063.467.964.466.067.8
Percentage of Assets3.73.05.38.76.713.512.711.110.317.6
Percentage of Assets country:US0.00.00.00.00.00.00.00.00.00.0

us-gaap:NonUs


Property
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value36343028252519201813
Percentage of PropertyPlantAndEquipmentNet31.434.832.234.438.036.632.135.634.032.2
Percentage of Assets1.71.62.54.64.17.86.06.25.38.4
Percentage of Assets us-gaap:NonUs0.00.00.00.00.00.00.00.00.00.0

Goodwill

us-gaap:Goodwill

us-gaap:Goodwill


Goodwill
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-312017-12-31
Value6356356350.3620.3470.3480.3720.3480.3590.360.382
Percentage of Goodwill100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets29.729.752.10.10.10.10.10.10.10.20.0

us-gaap:Goodwill us-gaap:BusinessAcquisition

fsly:SignalSciencesCorp


Goodwillus-gaap:
Period End2020-10-01
Value635
Percentage of Goodwill0.0
Percentage of Assets0.0
Percentage of Assets fsly:SignalSciencesCorp0.0

Indefinite Lived Intangible Assets Excluding Goodwill

us-gaap:IndefiniteLivedIntangibleAssetsExcludingGoodwill us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:IndefiniteLivedIntangibleAssetsExcludingGoodwill

us-gaap:DevelopedTechnologyRights


Indefinite
Period End2020-09-302020-06-302019-12-31
Value368000.0368000.00
Percentage of IndefiniteLivedIntangibleAssetsExcludingGoodwill100.0100.00.0
Percentage of Assets0.10.10.0
Percentage of Assets us-gaap:DevelopedTechnologyRights0.00.00.0

Intangible Assets Net Excluding Goodwill

us-gaap:IntangibleAssetsNetExcludingGoodwill

us-gaap:IntangibleAssetsNetExcludingGoodwill


Intangible
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value1131161212.7922.8641.0891.1251.1611.1980.61
Percentage of IntangibleAssetsNetExcludingGoodwill100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets5.35.410.00.40.50.30.40.40.30.4

Finite Lived Intangible Assets Net

us-gaap:FiniteLivedIntangibleAssetsNet

us-gaap:FiniteLivedIntangibleAssetsNet


Finite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value1121161212.4242.4961.0891.1251.1611.1980.61
Percentage of FiniteLivedIntangibleAssetsNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets5.35.49.90.40.40.30.40.40.30.4

us-gaap:FiniteLivedIntangibleAssetsNet us-gaap:FiniteLivedIntangibleAssetsByMajorClass

fsly:InternetProtocolAddresses


Finite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value4.2612.2412.3132.3852.4571.051.0861.1221.1590.61
Percentage of FiniteLivedIntangibleAssetsNet3.81.91.998.498.496.496.596.696.7100.0
Percentage of Assets0.20.10.20.40.40.30.30.30.30.4
Percentage of Assets fsly:InternetProtocolAddresses0.00.00.00.00.00.00.00.00.00.0

us-gaap:CustomerRelationships


Finite
Period End2021-06-302021-03-312020-12-31
Value626467
Percentage of FiniteLivedIntangibleAssetsNet55.555.855.2
Percentage of Assets2.93.05.5
Percentage of Assets us-gaap:CustomerRelationships0.00.00.0

us-gaap:DevelopedTechnologyRights


Finite
Period End2021-06-302021-03-312020-12-31
Value424447
Percentage of FiniteLivedIntangibleAssetsNet37.338.438.7
Percentage of Assets2.02.13.9
Percentage of Assets us-gaap:DevelopedTechnologyRights0.00.00.0

us-gaap:InternetDomainNames


Finite
Period End2021-06-302021-03-312020-12-312020-03-312019-12-312019-09-302019-06-302018-12-31
Value0.0390.0390.0390.0390.0390.0390.0390.0
Percentage of FiniteLivedIntangibleAssetsNet0.00.00.03.63.53.43.30.0
Percentage of Assets0.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:InternetDomainNames0.00.00.00.00.00.00.00.0

us-gaap:OrderOrProductionBacklog


Finite
Period End2021-06-302021-03-312020-12-31
Value1.3751.651.925
Percentage of FiniteLivedIntangibleAssetsNet1.21.41.6
Percentage of Assets0.10.10.2
Percentage of Assets us-gaap:OrderOrProductionBacklog0.00.00.0

us-gaap:TradeNames


Finite
Period End2021-06-302021-03-312020-12-31
Value2.4752.753.025
Percentage of FiniteLivedIntangibleAssetsNet2.22.42.5
Percentage of Assets0.10.10.2
Percentage of Assets us-gaap:TradeNames0.00.00.0

Operating Lease Right Of Use Asset

us-gaap:OperatingLeaseRightOfUseAsset

us-gaap:OperatingLeaseRightOfUseAsset


Operating
Period End2021-06-302021-03-312020-12-312020-01-01
Value62636054
Percentage of OperatingLeaseRightOfUseAsset100.0100.0100.0100.0
Percentage of Assets2.93.04.90.0

us-gaap:OperatingLeaseRightOfUseAsset us-gaap:BusinessAcquisition

fsly:SignalSciencesCorp


Operating
Period End2020-10-01
Value5.8
Percentage of OperatingLeaseRightOfUseAsset0.0
Percentage of Assets0.0
Percentage of Assets fsly:SignalSciencesCorp0.0

Other Assets Noncurrent

us-gaap:OtherAssetsNoncurrent

us-gaap:OtherAssetsNoncurrent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value2756451513111013122.163
Percentage of OtherAssetsNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.32.73.72.42.23.63.24.03.61.3

Accounts Payable Current

us-gaap:AccountsPayableCurrent

us-gaap:AccountsPayableCurrent


Accounts
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value10129.15126.0879.4574.6026.7965.7532.333
Percentage of AccountsPayableCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.50.60.81.91.02.91.42.11.61.4

Accrued Liabilities Current

us-gaap:AccruedLiabilitiesCurrent

us-gaap:AccruedLiabilitiesCurrent


Accrued
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value28363438222019232515
Percentage of AccruedLiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.31.72.86.13.76.26.27.27.09.5

Contract With Customer Liability Current

us-gaap:ContractWithCustomerLiabilityCurrent

us-gaap:ContractWithCustomerLiabilityCurrent


Contract
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-31
Value2218150.0420.0480.8520.3171.622
Percentage of ContractWithCustomerLiabilityCurrent100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.10.81.30.00.00.30.11.0

Liabilities Current

us-gaap:LiabilitiesCurrent

us-gaap:LiabilitiesCurrent


Liabilities
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value103989466384037456531
Percentage of LiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets4.84.67.710.56.312.511.613.918.319.5

Long Term Debt Current

us-gaap:LongTermDebtCurrent

us-gaap:LongTermDebtCurrent


Long
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value6.065.1885.2914.472133211
Percentage of LongTermDebtCurrent100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.00.91.61.44.19.27.0

Operating Lease Liability Current

us-gaap:OperatingLeaseLiabilityCurrent

us-gaap:OperatingLeaseLiabilityCurrent


Operating
Period End2021-06-302021-03-312020-12-31
Value192019
Percentage of OperatingLeaseLiabilityCurrent100.0100.0100.0
Percentage of Assets0.90.91.6

Other Accrued Liabilities Current

us-gaap:OtherAccruedLiabilitiesCurrent

us-gaap:OtherAccruedLiabilitiesCurrent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value6050000.05324000.04368000.03551000.04604000.03533000.03969000.02953000.06082000.05457000.0
Percentage of OtherAccruedLiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.30.20.40.60.81.11.20.91.73.4

Other Liabilities Current

us-gaap:OtherLiabilitiesCurrent

us-gaap:OtherLiabilitiesCurrent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value2919199.5554.4025.438.1691.6111.5892.512
Percentage of OtherLiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.40.91.61.50.71.72.50.50.41.5

Long Term Debt

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

us-gaap:LongTermDebt

fsly:A2026ConvertibleNotes, us-gaap:ConvertibleDebt


Long
Period End2021-06-302021-03-31
Value931930
Percentage of LongTermDebt100.0100.0
Percentage of Assets43.643.5
Percentage of Assets fsly:A2026ConvertibleNotes us-gaap:ConvertibleDebt0.00.0

Long Term Debt Noncurrent

us-gaap:LongTermDebtNoncurrent

us-gaap:LongTermDebtNoncurrent


Long
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value93193026242625151739
Percentage of LongTermDebtNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets43.643.54.14.18.07.84.75.024.2

Long Term Debt And Capital Lease Obligations

us-gaap:LongTermDebtAndCapitalLeaseObligations

us-gaap:LongTermDebtAndCapitalLeaseObligations


Long
Period End2020-09-302019-12-312018-12-31
Value352539
Percentage of LongTermDebtAndCapitalLeaseObligations100.0100.0100.0
Percentage of Assets5.77.824.2

Other Liabilities Noncurrent

us-gaap:OtherLiabilitiesNoncurrent

us-gaap:OtherLiabilitiesNoncurrent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value6502000.03520000.04400000.03944000.02533000.01357000.01038000.06983000.05911000.0647000.0
Percentage of OtherLiabilitiesNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.30.20.40.60.40.40.32.11.70.4

Operating Lease Liability Noncurrent

us-gaap:OperatingLeaseLiabilityNoncurrent

us-gaap:OperatingLeaseLiabilityNoncurrent


Operating
Period End2021-06-302021-03-312020-12-31
Value474744
Percentage of OperatingLeaseLiabilityNoncurrent100.0100.0100.0
Percentage of Assets2.22.23.7

Lessee Operating Lease Liability Payments Due Year Two

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo


Lessee
Period End2021-06-302021-03-312020-12-31
Value131117
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearTwo100.0100.0100.0
Percentage of Assets0.70.51.4

Lessee Operating Lease Liability Payments Due Year Three

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree


Lessee
Period End2021-06-302021-03-312020-12-31
Value129.34310
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearThree100.0100.0100.0
Percentage of Assets0.60.40.9

Lessee Operating Lease Liability Payments Due Year Four

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour


Lessee
Period End2021-06-302021-03-312020-12-31
Value118.9157.965
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearFour100.0100.0100.0
Percentage of Assets0.60.40.7

Lessee Operating Lease Liability Payments Due Year Five

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive


Lessee
Period End2020-12-31
Value7416000.0
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 End2020-12-31
Value9888000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive100.0
Percentage of Assets0.8

Operating Lease Liability

us-gaap:OperatingLeaseLiability

us-gaap:OperatingLeaseLiability


Operating
Period End2021-06-302021-03-312020-12-312020-01-01
Value84706656
Percentage of OperatingLeaseLiability100.0100.0100.0100.0
Percentage of Assets4.03.35.50.0

us-gaap:OperatingLeaseLiability us-gaap:BusinessAcquisition

fsly:SignalSciencesCorp


Operating
Period End2020-10-01
Value6.2
Percentage of OperatingLeaseLiability0.0
Percentage of Assets0.0
Percentage of Assets fsly:SignalSciencesCorp0.0

Lessee Operating Lease Liability Payments Due

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue


Lessee
Period End2021-06-302021-03-312020-12-31
Value937976
Percentage of LesseeOperatingLeaseLiabilityPaymentsDue100.0100.0100.0
Percentage of Assets4.43.76.2

Lessee Operating Lease Liability Undiscounted Excess Amount

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount


Lessee
Period End2021-06-302021-03-312020-12-31
Value9252000.09638000.09591000.0
Percentage of LesseeOperatingLeaseLiabilityUndiscountedExcessAmount100.0100.0100.0
Percentage of Assets0.40.50.8

Stockholders Equity

us-gaap:StockholdersEquity

us-gaap:StockholdersEquity


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-31
Value102910451061535542256257259267-133.598-131.927-126.61-119.506-115.189-107.006-78.249
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets48.248.987.084.789.279.180.379.375.00.0-81.10.00.00.00.00.0

us-gaap:StockholdersEquity us-gaap:StatementClassOfStock, us-gaap:StatementEquityComponents

us-gaap:CommonClassA, us-gaap:CommonStock


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-312016-12-31
Value0.0010.0010.0010.0010.0010.0010.0010.00.00.00.00.00.0
Percentage of StockholdersEquity0.00.00.00.00.00.00.00.00.0-0.0-0.0-0.0-0.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:CommonClassA us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CommonClassB, us-gaap:CommonStock


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-312016-12-31
Value0.0010.0010.0010.0010.0010.0010.0010.0020.0020.0010.0010.0010.001
Percentage of StockholdersEquity0.00.00.00.00.00.00.00.00.0-0.0-0.0-0.0-0.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:CommonClassB us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:StockholdersEquity us-gaap:StatementEquityComponents

us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss


Stockholders
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value0.0420.097-0.024-0.013-0.006
Percentage of StockholdersEquity0.00.00.00.00.0
Percentage of Assets0.00.0-0.00.00.0
Percentage of Assets us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss0.00.00.00.00.0

us-gaap:AccumulatedOtherComprehensiveIncome


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-31
Value-0.261-0.1370.0060.1240.3850.6870.196-0.0220.0130.02-0.036-0.032-0.0020.036-0.024-0.049
Percentage of StockholdersEquity-0.0-0.00.00.00.10.30.1-0.00.0-0.00.00.00.0-0.00.00.1
Percentage of Assets-0.0-0.00.00.00.10.20.1-0.00.00.0-0.00.00.00.00.00.0
Percentage of Assets us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedTranslationAdjustment


Stockholders
Period End2020-12-312019-12-312018-12-312017-12-312016-12-31
Value-0.0360.099-0.012-0.011-0.043
Percentage of StockholdersEquity-0.00.00.00.00.1
Percentage of Assets-0.00.0-0.00.00.0
Percentage of Assets us-gaap:AccumulatedTranslationAdjustment0.00.00.00.00.0

us-gaap:AdditionalPaidInCapital


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-31
Value1426138413507777604594494394351816141211106.709
Percentage of StockholdersEquity138.6132.4127.1145.2140.2179.4174.4169.4162.8-14.0-12.4-11.4-10.9-9.9-9.7-8.6
Percentage of Assets66.864.7110.7123.1125.1141.8140.0134.3122.10.010.10.00.00.00.00.0
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings


Stockholders
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-31
Value-397.171-338.876-288.193-242.237-218.459-203.999-192.009-177.936-165.773-150.186-146.186-138.88-130.393-124.557-115.251-82.801
Percentage of StockholdersEquity-38.6-32.4-27.1-45.3-40.3-79.7-74.5-68.6-62.0112.4110.8109.7109.1108.1107.7105.8
Percentage of Assets-18.6-15.8-23.6-38.4-35.9-63.0-59.8-54.4-46.50.0-89.80.00.00.00.00.0
Percentage of Assets us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Common Stock Value

us-gaap:CommonStockValue

us-gaap:CommonStockValue


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value2000.02000.02000.02000.02000.02000.02000.02000.02000.01000.0
Percentage of CommonStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.0

Additional Paid In Capital

us-gaap:AdditionalPaidInCapital

us-gaap:AdditionalPaidInCapital


Additional
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value14261384135077776045944943943516
Percentage of AdditionalPaidInCapital100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets66.864.7110.7123.1125.1141.8140.0134.3122.110.1

Retained Earnings Accumulated Deficit

us-gaap:RetainedEarningsAccumulatedDeficit

us-gaap:RetainedEarningsAccumulatedDeficit


Retained
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value-397170000.0-338880000.0-288190000.0-242240000.0-218460000.0-204000000.0-192010000.0-177940000.0-165770000.0-146190000.0
Percentage of RetainedEarningsAccumulatedDeficit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets-18.6-15.8-23.6-38.4-35.9-63.0-59.8-54.4-46.5-89.8

Accumulated Other Comprehensive Income Loss Net Of Tax

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax


Accumulated
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value-261000.0-137000.06000.0124000.0385000.0687000.0196000.0-22000.013000.0-36000.0
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets-0.0-0.00.00.00.10.20.1-0.00.0-0.0

Stock Issued During Period Value New Issues

us-gaap:StockIssuedDuringPeriodValueNewIssues

us-gaap:StockIssuedDuringPeriodValueNewIssues


Stock
Period End2020-12-312020-09-302020-06-302019-12-312019-09-302019-06-30
Value0.00.02740.00.0186
Percentage of StockIssuedDuringPeriodValueNewIssues0.00.0100.00.00.0100.0
Percentage of Assets0.00.00.00.00.00.0

us-gaap:StockIssuedDuringPeriodValueNewIssues us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Stock
Period End2020-12-312020-09-302020-06-302019-12-312019-09-302019-06-30
Value0.00.02740.00.0186
Percentage of StockIssuedDuringPeriodValueNewIssues0.00.0100.00.00.0100.0
Percentage of Assets0.00.00.00.00.00.0
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.0

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

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue


Adjustments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value33313012166.5775.0363.842.2431.4671.280.9610.99
Percentage of AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Adjustments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value33313012166.5775.0363.842.2431.4671.280.9610.99
Percentage of AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.00.00.0

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInOperatingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value-17.014-10.869-31.14927-8.781-7.186-3.06-12.595-5.565-10.083-0.786-3.615
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax-20.0-12.8-37.738.5-11.8-11.4-5.2-25.3-12.1-22.1-1.9-9.8

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value-244.505-35.399-267.43520-37.579.74232-125.2648.701-3.594-8.849-37.694
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax-287.6-41.7-323.628.7-50.315.555.1-251.518.8-7.9-21.7-102.4

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value0.751932-17.5815.1932813.7661.93-20.909189-1.923251.152
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.91098.7-21.37.4376.86.03.3-42.0409.4-4.262.03.1

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

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value-260.797885-316.175522346.35931-158.757192-15.60815-40.152
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax-306.71044.0-382.674.4314.610.153.3-318.8416.2-34.338.4-109.0

Amortization Of Financing Costs

us-gaap:AmortizationOfFinancingCosts

us-gaap:AmortizationOfFinancingCosts


Amortization
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value161000.020000.019000.019000.025000.068000.01657000.0159000.000
Percentage of AmortizationOfFinancingCosts100.0100.0100.0100.0100.0100.0100.0100.00.00.0

Depreciation Depletion And Amortization

us-gaap:DepreciationDepletionAndAmortization

us-gaap:DepreciationDepletionAndAmortization


Depreciation
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value5.5684.9674.7294.7154.864.0693.93.7383.6823.4233.3
Percentage of DepreciationDepletionAndAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Increase Decrease In Accounts Payable

us-gaap:IncreaseDecreaseInAccountsPayable

us-gaap:IncreaseDecreaseInAccountsPayable


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value-1957000.02119000.0-2987000.05682000.0-1748000.03112000.0-2188000.01309000.01584000.01686000.0-1894000.02911000.0
Percentage of IncreaseDecreaseInAccountsPayable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Increase Decrease In Accounts Receivable

us-gaap:IncreaseDecreaseInAccountsReceivable

us-gaap:IncreaseDecreaseInAccountsReceivable


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value3.9271.6852.595-15.542166.0313.2475.638-0.7044.5861.7921.067
Percentage of IncreaseDecreaseInAccountsReceivable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInOperatingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value-17.014-10.869-31.14927-8.781-7.186-3.06-12.595-5.565-10.083-0.786-3.615
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax-20.0-12.8-37.738.5-11.8-11.4-5.2-25.3-12.1-22.1-1.9-9.8

Net Income Loss

us-gaap:NetIncomeLoss

us-gaap:NetIncomeLoss


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value-58295000.0-50683000.0-45704000.0-23778000.0-14460000.0-11990000.0-14073000.0-12163000.0-15587000.0-9727000.0-7306000.0-8487000.0-5836000.0
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax-68.6-59.7-55.3-33.7-19.4-19.1-23.9-24.4-33.8-21.4-17.9-23.0-16.9

us-gaap:NetIncomeLoss us-gaap:BusinessAcquisition

fsly:SignalSciencesCorp


Net
Period End2020-12-31
Value-23000000.0
Percentage of NetIncomeLoss50.3
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax-27.8
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax fsly:SignalSciencesCorp-343.3

us-gaap:NetIncomeLoss us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value-58295000.0-50683000.0-45704000.0-23778000.0-14460000.0-11990000.0-14073000.0-12163000.0-15587000.0-9727000.0-7306000.0-8487000.0-5836000.0
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax-68.6-59.7-55.3-33.7-19.4-19.1-23.9-24.4-33.8-21.4-17.9-23.0-16.9
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.0

Share Based Compensation

us-gaap:ShareBasedCompensation

us-gaap:ShareBasedCompensation


Share
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value33302912166.3294.5953.842.2431.4671.280.961
Percentage of ShareBasedCompensation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value-244.505-35.399-267.43520-37.579.74232-125.2648.701-3.594-8.849-37.694
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax-287.6-41.7-323.628.7-50.315.555.1-251.518.8-7.9-21.7-102.4

Payments To Acquire Property Plant And Equipment

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value2.9348.0795.126112.329104.2091.1715.2044.0256.8630.005
Percentage of PaymentsToAcquirePropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities


Net
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value0.751932-17.5815.1932813.7661.93-20.909189-1.923251.152
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax0.91098.7-21.37.4376.86.03.3-42.0409.4-4.262.03.1

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

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber


Share
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-312017-12-312016-12-31
Value5.756.286.9637.298.331011121212108.467
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice


Share
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-312017-12-312016-12-31
Value5.515.675.635.285.194.894.684.494.042.961.921.54
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod

us-gaap:PerformanceShares


Share
Period End2021-06-302021-03-312020-06-302020-03-31
Value071000.0087918.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod0.0100.00.0100.0

us-gaap:RestrictedStockUnitsRSU


Share
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-31
Value900000.0405000.0672000.053000.02601000.01072000.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod0.0570.40.00.00.01219.3

Deferred Tax Liabilities

us-gaap:DeferredTaxLiabilities

us-gaap:DeferredTaxLiabilities


Deferred
Period End2020-12-31
Value253000.0
Percentage of DeferredTaxLiabilities100.0

Unrecognized Tax Benefits

us-gaap:UnrecognizedTaxBenefits

us-gaap:UnrecognizedTaxBenefits


Unrecognized
Period End2020-12-312019-12-312018-12-31
Value3186000.000
Percentage of UnrecognizedTaxBenefits100.00.00.0

Deferred Tax Assets Valuation Allowance

us-gaap:DeferredTaxAssetsValuationAllowance

us-gaap:DeferredTaxAssetsValuationAllowance


Deferred
Period End2020-12-312019-12-312018-12-31
Value803328
Percentage of DeferredTaxAssetsValuationAllowance100.0100.0100.0

fsly:AmortizationOfDeferredRent

fsly:AmortizationOfDeferredRent


Amortization
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value1450000.01287000.0204000.0-5892000.01196000.03968000.017000.0-112000.0-116000.0
Percentage of AmortizationOfDeferredRent100.0100.0100.0100.0100.0100.0100.0100.0100.0

fsly:AmortizationOfRightOfUseAssetsAndOther

fsly:AmortizationOfRightOfUseAssetsAndOther


Amortization
Period End2021-06-302021-03-312020-06-302020-03-31
Value6.3036.3575.2394.949
Percentage of AmortizationOfRightOfUseAssetsAndOther100.0100.0100.0100.0

fsly:AmountWithheldInContributionsForEmployeeStockPurchasePlan

fsly:AmountWithheldInContributionsForEmployeeStockPurchasePlan


Amount
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-30
Value2600000.03400000.03500000.02000000.01900000.02200000.02400000.02300000.0800000.0
Percentage of AmountWithheldInContributionsForEmployeeStockPurchasePlan100.0100.0100.0100.0100.0100.0100.0100.0100.0

fsly:BusinessCombinationConsiderationTransferredPortionAllocatedToFutureServices us-gaap:BusinessAcquisition

fsly:BusinessCombinationConsiderationTransferredPortionAllocatedToFutureServices

fsly:SignalSciencesCorp


Business
Period End2020-10-01
Value20
Percentage of BusinessCombinationConsiderationTransferredPortionAllocatedToFutureServices100.0

fsly:BusinessCombinationConsiderationTransferredPortionAllocatedToPurchasePrice us-gaap:BusinessAcquisition

fsly:BusinessCombinationConsiderationTransferredPortionAllocatedToPurchasePrice

fsly:SignalSciencesCorp


Business
Period End2020-10-01
Value1100000.0
Percentage of BusinessCombinationConsiderationTransferredPortionAllocatedToPurchasePrice100.0

fsly:CashReleasedFromRestriction

fsly:CashReleasedFromRestriction


Cash
Period End2020-11-30
Value70
Percentage of CashReleasedFromRestriction100.0

fsly:CashlessExerciseOfCommonStockWarrants

fsly:CashlessExerciseOfCommonStockWarrants


Cashless
Period End2020-12-312020-09-302019-12-312019-09-302018-12-31
Value0001036000.00
Percentage of CashlessExerciseOfCommonStockWarrants0.00.00.0100.00.0

fsly:CommonStockSharesRetired us-gaap:StatementClassOfStock, us-gaap:SubsequentEventType

fsly:CommonStockSharesRetired

us-gaap:CommonClassB, us-gaap:SubsequentEvent


Common
Period End2021-07-12
Value90
Percentage of CommonStockSharesRetired100.0

fsly:FinanceLeaseCost

fsly:FinanceLeaseCost


Finance
Period End2021-06-302021-03-312020-06-302020-03-31
Value1655000.01564000.0872000.0805000.0
Percentage of FinanceLeaseCost100.0100.0100.0100.0

fsly:IncreaseDecreaseInOperatingLeaseLiabilities

fsly:IncreaseDecreaseInOperatingLeaseLiabilities


Increase
Period End2021-06-302021-03-312020-06-302020-03-31
Value-6491000.0-6365000.0-4141000.0-4272000.0
Percentage of IncreaseDecreaseInOperatingLeaseLiabilities100.0100.0100.0100.0

fsly:InterestPaidonCapitalLease

fsly:InterestPaidonCapitalLease


Interest
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value186000.0149000.0119000.095000.098000.094000.077000.034000.053000.0
Percentage of InterestPaidonCapitalLease100.0100.0100.0100.0100.0100.0100.0100.0100.0

fsly:OperatingVariableAndShortTermLeaseCosts

fsly:OperatingVariableAndShortTermLeaseCosts


Operating
Period End2021-06-302021-03-312020-06-302020-03-31
Value7.9127.716.5825.976
Percentage of OperatingVariableAndShortTermLeaseCosts100.0100.0100.0100.0

fsly:SharebasedCompensationArrangementbySharebasedPaymentAwardMaximumEmployeeDeferralAsAPercentOfSalary us-gaap:AwardType

fsly:SharebasedCompensationArrangementbySharebasedPaymentAwardMaximumEmployeeDeferralAsAPercentOfSalary

us-gaap:EmployeeStock


Sharebased
Period End2021-06-302021-03-31
Value015.0
Percentage of SharebasedCompensationArrangementbySharebasedPaymentAwardMaximumEmployeeDeferralAsAPercentOfSalary0.0100.0

fsly:StockIssuedDuringPeriodValueVestingOfEarlyExercisedStockOptions

fsly:StockIssuedDuringPeriodValueVestingOfEarlyExercisedStockOptions


Stock
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value64000.064000.066000.0127000.0128000.0146000.0155000.0155000.0155000.0155000.0198000.069000.030000.0
Percentage of StockIssuedDuringPeriodValueVestingOfEarlyExercisedStockOptions100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

fsly:StockIssuedDuringPeriodValueVestingOfEarlyExercisedStockOptions us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Stock
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value64000.064000.066000.0127000.0128000.0146000.0155000.0155000.0155000.0155000.0198000.069000.030000.0
Percentage of StockIssuedDuringPeriodValueVestingOfEarlyExercisedStockOptions100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

fsly:VestingofEarlyExercisedStockOptions

fsly:VestingofEarlyExercisedStockOptions


Vestingof
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value64000.064000.0127000.0128000.0146000.0155000.0155000.0155000.0155000.0198000.058000.0
Percentage of VestingofEarlyExercisedStockOptions100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AmortizationOfFinancingCostsAndDiscounts

us-gaap:AmortizationOfFinancingCostsAndDiscounts


Amortization
Period End2021-06-302021-03-312020-06-302020-03-31
Value937000.0332000.019000.019000.0
Percentage of AmortizationOfFinancingCostsAndDiscounts100.0100.0100.0100.0

us-gaap:BusinessCombinationConsiderationTransferred1 us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationConsiderationTransferred1

fsly:SignalSciencesCorp


Business
Period End2020-10-01
Value759
Percentage of BusinessCombinationConsiderationTransferred1100.0

us-gaap:BusinessCombinationConsiderationTransferred1 us-gaap:BusinessAcquisition, us-gaap:SubsequentEventType

fsly:SignalSciencesCorp, us-gaap:SubsequentEvent


Business
Period End2020-10-01
Value775
Percentage of BusinessCombinationConsiderationTransferred1102.1

us-gaap:CapitalExpendituresIncurredButNotYetPaid

us-gaap:CapitalExpendituresIncurredButNotYetPaid


Capital
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value1064000.0750000.0-6429000.05728000.0-1743000.05628000.0-631000.0-333000.08003000.032000.0-22000.0-210000.0
Percentage of CapitalExpendituresIncurredButNotYetPaid100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CapitalLeaseObligationsIncurred

us-gaap:CapitalLeaseObligationsIncurred


Capital
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value2470000.0-257000.03226000.02630000.01010000.0-342000.04082000.0-1000.0-28000.0
Percentage of CapitalLeaseObligationsIncurred100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CapitalizedContractCostAmortization

us-gaap:CapitalizedContractCostAmortization


Capitalized
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value1500000.01411000.01141000.0900000.0800000.0700000.0594000.0600000.0600000.0500000.0
Percentage of CapitalizedContractCostAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ContractWithCustomerLiabilityIncreaseDecreaseForContractAcquiredInBusinessCombination

us-gaap:ContractWithCustomerLiabilityIncreaseDecreaseForContractAcquiredInBusinessCombination


Contract
Period End2020-10-01
Value14
Percentage of ContractWithCustomerLiabilityIncreaseDecreaseForContractAcquiredInBusinessCombination100.0

us-gaap:ContractWithCustomerLiabilityRevenueRecognized

us-gaap:ContractWithCustomerLiabilityRevenueRecognized


Contract
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-31
Value6.845.9030.00.0370.8340.1780.0220.5181.0690.936
Percentage of ContractWithCustomerLiabilityRevenueRecognized100.0100.00.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DebtInstrumentInterestRateDuringPeriod us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:DebtInstrumentInterestRateDuringPeriod

fsly:A2026ConvertibleNotes, us-gaap:ConvertibleDebt


Debt
Period End2021-06-302021-03-31
Value00.4
Percentage of DebtInstrumentInterestRateDuringPeriod0.0100.0

us-gaap:Depreciation

us-gaap:Depreciation


Depreciation
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value6.96.44.94.74.74.84.03.93.73.63.4
Percentage of Depreciation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Depreciation us-gaap:PropertyPlantAndEquipmentByType

us-gaap:SoftwareDevelopment


Depreciationus-gaap:
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value1.00.90.50.60.60.60.50.50.80.50.4
Percentage of Depreciation14.514.110.212.812.812.512.512.821.613.911.8

us-gaap:DepreciationNonproduction

us-gaap:DepreciationNonproduction


Depreciation
Period End2021-06-302021-03-312020-06-302020-03-31
Value6.9276.4194.6934.679
Percentage of DepreciationNonproduction100.0100.0100.0100.0

us-gaap:EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

us-gaap:EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents


Effect
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value-29000.0-112000.0-10000.0-83000.0-93000.037000.087000.011000.09000.0-8000.08000.05000.0
Percentage of EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EmployeeBenefitsAndShareBasedCompensation us-gaap:AwardType

us-gaap:EmployeeBenefitsAndShareBasedCompensation

us-gaap:PerformanceShares


Employee
Period End2021-06-302021-03-31
Value1700000.02100000.0
Percentage of EmployeeBenefitsAndShareBasedCompensation100.0100.0

us-gaap:EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount

us-gaap:EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount


Employee
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-06-302019-03-31
Value400000.0374000.0796000.0600000.0400000.0248000.000
Percentage of EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsCapitalizedAmount100.0100.0100.0100.0100.0100.00.00.0

us-gaap:ExtinguishmentOfDebtAmount

us-gaap:ExtinguishmentOfDebtAmount


Extinguishment
Period End2020-11-30
Value20
Percentage of ExtinguishmentOfDebtAmount100.0

us-gaap:FinanceLeaseInterestExpense

us-gaap:FinanceLeaseInterestExpense


Finance
Period End2021-06-302021-03-312020-06-302020-03-31
Value405000.0330000.0149000.0119000.0
Percentage of FinanceLeaseInterestExpense100.0100.0100.0100.0

us-gaap:FinanceLeaseInterestPaymentOnLiability

us-gaap:FinanceLeaseInterestPaymentOnLiability


Finance
Period End2021-06-302021-03-312020-06-302020-03-31
Value405000.0330000.0149000.0119000.0
Percentage of FinanceLeaseInterestPaymentOnLiability100.0100.0100.0100.0

us-gaap:FinanceLeasePrincipalPayments

us-gaap:FinanceLeasePrincipalPayments


Finance
Period End2021-06-302021-03-312020-06-302020-03-31
Value3628000.02951000.01307000.01593000.0
Percentage of FinanceLeasePrincipalPayments100.0100.0100.0100.0

us-gaap:FinanceLeaseRightOfUseAssetAmortization

us-gaap:FinanceLeaseRightOfUseAssetAmortization


Finance
Period End2021-06-302021-03-312020-06-302020-03-31
Value1250000.01234000.0723000.0686000.0
Percentage of FinanceLeaseRightOfUseAssetAmortization100.0100.0100.0100.0

us-gaap:GainLossOnSaleOfPropertyPlantEquipment

us-gaap:GainLossOnSaleOfPropertyPlantEquipment


Gain
Period 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
Value0-27000.0-786000.0133000.000-65000.0-4000.0-3000.0-36000.000
Percentage of GainLossOnSaleOfPropertyPlantEquipment0.0100.0100.0100.00.00.0100.0100.0100.0100.00.00.0

us-gaap:GainLossOnSaleOfPropertyPlantEquipment us-gaap:PropertyPlantAndEquipmentByType

us-gaap:ComputerEquipment


Gain
Period End2020-09-30
Value100000.0
Percentage of GainLossOnSaleOfPropertyPlantEquipment75.2

us-gaap:GoodwillForeignCurrencyTranslationGainLoss

us-gaap:GoodwillForeignCurrencyTranslationGainLoss


Goodwill
Period End2021-06-302021-03-312020-12-31
Value1000.055000.024000.0
Percentage of GoodwillForeignCurrencyTranslationGainLoss100.0100.0100.0

us-gaap:IncreaseDecreaseInAccruedLiabilities

us-gaap:IncreaseDecreaseInAccruedLiabilities


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value-3.08-0.755-4.232144.121-1.4957.104-2.990.794-0.5075.667-1.726
Percentage of IncreaseDecreaseInAccruedLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInOtherOperatingAssets

us-gaap:IncreaseDecreaseInOtherOperatingAssets


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value2.1372.9529.7524.1221.8881.4-3.1270.3833.1061.86-0.0030.507
Percentage of IncreaseDecreaseInOtherOperatingAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInOtherOperatingLiabilities

us-gaap:IncreaseDecreaseInOtherOperatingLiabilities


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value7733000.01071000.05178000.015000.0-843000.0507000.0-413000.049000.0-328000.0-582000.0579000.0470000.0
Percentage of IncreaseDecreaseInOtherOperatingLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets

us-gaap:IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets


Increase
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value3814000.01680000.01772000.01795000.0835000.01148000.0-3145000.02031000.02278000.0931000.0787000.034000.0
Percentage of IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InvestmentIncomeInterest

us-gaap:InvestmentIncomeInterest


Investment
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value276000.0174000.0178000.0353000.0378000.0719000.0856000.01154000.0861000.0416000.0362000.0293000.0147000.0
Percentage of InvestmentIncomeInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LeaseAndRentalExpense

us-gaap:LeaseAndRentalExpense


Lease
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value2000000.02000000.02300000.02300000.01800000.01800000.01800000.01700000.01800000.01700000.0
Percentage of LeaseAndRentalExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingLeaseCost

us-gaap:OperatingLeaseCost


Operating
Period End2021-06-302021-03-312020-06-302020-03-31
Value6.4526.3525.2274.935
Percentage of OperatingLeaseCost100.0100.0100.0100.0

us-gaap:OperatingLeasePayments

us-gaap:OperatingLeasePayments


Operating
Period End2021-06-302021-03-312020-06-302020-03-31
Value6.4916.3654.1414.272
Percentage of OperatingLeasePayments100.0100.0100.0100.0

us-gaap:OperatingLeasesIncomeStatementSubleaseRevenue

us-gaap:OperatingLeasesIncomeStatementSubleaseRevenue


Operating
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value300000.0300000.0300000.0300000.0300000.0300000.0300000.0300000.0100000.0200000.0
Percentage of OperatingLeasesIncomeStatementSubleaseRevenue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent

us-gaap:OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value-147000.0-78000.0-132000.0-193000.0-208000.0478000.0102000.0-23000.014000.029000.0-14000.0-4000.08000.0
Percentage of OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent

us-gaap:OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value23000.0-65000.014000.0-68000.0-94000.013000.0116000.0-12000.0-21000.027000.010000.0-26000.0-46000.0
Percentage of OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent

us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value-124000.0-143000.0-118000.0-261000.0-302000.0491000.0218000.0-35000.0-7000.056000.0-4000.0-30000.0-38000.0
Percentage of OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value-124000.0-143000.0-118000.0-261000.0-302000.0491000.0218000.0-35000.0-7000.056000.0-4000.0-30000.0-38000.0
Percentage of OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherNoncashIncomeExpense

us-gaap:OtherNoncashIncomeExpense


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value-749000.0-64000.0-417000.0-227000.0-19000.039000.089000.0102000.0176000.0224000.0188000.0124000.0
Percentage of OtherNoncashIncomeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsForSoftware

us-gaap:PaymentsForSoftware


Payments
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value1691000.0989000.02049000.01901000.0744000.01437000.01638000.01511000.0948000.0759000.0466000.0
Percentage of PaymentsForSoftware100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsOfDebtIssuanceCosts

us-gaap:PaymentsOfDebtIssuanceCosts


Payments
Period End2021-06-302021-03-31
Value01351000.0
Percentage of PaymentsOfDebtIssuanceCosts0.0100.0

us-gaap:PaymentsOfStockIssuanceCosts us-gaap:SubsidiarySaleOfStock

us-gaap:PaymentsOfStockIssuanceCosts

fsly:SecondaryPublicOffering


Payments
Period End2020-12-312020-09-30
Value0502000.0
Percentage of PaymentsOfStockIssuanceCosts0.0100.0

us-gaap:PaymentsToAcquireBusinessesGross us-gaap:BusinessAcquisition

us-gaap:PaymentsToAcquireBusinessesGross

fsly:SignalSciencesCorp


Payments
Period End2020-10-01
Value223
Percentage of PaymentsToAcquireBusinessesGross100.0

us-gaap:PaymentsToAcquireBusinessesGross us-gaap:BusinessAcquisition, us-gaap:SubsequentEventType

fsly:SignalSciencesCorp, us-gaap:SubsequentEvent


Payments
Period End2020-10-01
Value200
Percentage of PaymentsToAcquireBusinessesGross89.7

us-gaap:PaymentsToAcquireIntangibleAssets

us-gaap:PaymentsToAcquireIntangibleAssets


Payments
Period End2021-06-302020-12-312020-09-302019-12-312019-09-302018-12-312018-09-30
Value2093000.000-1000.0000
Percentage of PaymentsToAcquireIntangibleAssets100.00.00.0100.00.00.00.0

us-gaap:PaymentsToAcquireIntangibleAssets us-gaap:FiniteLivedIntangibleAssetsByMajorClass

fsly:InternetProtocolAddressesAndDomainNames


Payments
Period End2020-09-302020-06-30
Value01400000.0
Percentage of PaymentsToAcquireIntangibleAssets0.00.0

us-gaap:DevelopedTechnologyRights


Payments
Period End2020-09-302020-06-30
Value0400000.0
Percentage of PaymentsToAcquireIntangibleAssets0.00.0

us-gaap:PaymentsToAcquireShortTermInvestments

us-gaap:PaymentsToAcquireShortTermInvestments


Payments
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-31
Value26964148560.01441220
Percentage of PaymentsToAcquireShortTermInvestments100.0100.0100.0100.00.0100.0100.0100.0

us-gaap:ProceedsFromConvertibleDebt

us-gaap:ProceedsFromConvertibleDebt


Proceeds
Period End2021-06-302021-03-31
Value0.0930
Percentage of ProceedsFromConvertibleDebt0.0100.0

us-gaap:ProceedsFromConvertibleDebt us-gaap:DebtInstrument

fsly:A2026ConvertibleNotes


Proceeds
Period End2021-03-05
Value930
Percentage of ProceedsFromConvertibleDebt0.0

us-gaap:ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities

us-gaap:ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities


Proceeds
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-302019-06-302019-03-312018-09-30
Value0.0121430.00.0-44.056443.578-19.927
Percentage of ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities0.0100.0100.00.00.0100.0100.0100.0100.0

us-gaap:ProceedsFromSaleAndMaturityOfMarketableSecurities

us-gaap:ProceedsFromSaleAndMaturityOfMarketableSecurities


Proceeds
Period End2021-06-302021-03-312020-09-302020-06-302020-03-312019-09-30
Value312538232123
Percentage of ProceedsFromSaleAndMaturityOfMarketableSecurities100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromSaleOfPropertyPlantAndEquipment

us-gaap:ProceedsFromSaleOfPropertyPlantAndEquipment


Proceeds
Period End2020-12-31
Value425000.0
Percentage of ProceedsFromSaleOfPropertyPlantAndEquipment100.0

us-gaap:ProceedsFromStockOptionsExercised

us-gaap:ProceedsFromStockOptionsExercised


Proceeds
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value2.8862.7192.324.1225.6573.1742.7510.2981.8910.6390.5040.366
Percentage of ProceedsFromStockOptionsExercised100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromStockPlans

us-gaap:ProceedsFromStockPlans


Proceeds
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value1493000.03071000.03112000.02042000.02031000.02133000.02271000.02321000.0810000.0000
Percentage of ProceedsFromStockPlans100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.0

us-gaap:ProvisionForDoubtfulAccounts

us-gaap:ProvisionForDoubtfulAccounts


Provision
Period 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
Value225000.0-420000.0507000.0196000.0866000.0150000.016000.0275000.0-533000.0602000.059000.0264000.0
Percentage of ProvisionForDoubtfulAccounts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RepaymentsOfLongTermCapitalLeaseObligations

us-gaap:RepaymentsOfLongTermCapitalLeaseObligations


Repayments
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value469000.01050000.01541000.0465000.0229000.0340000.0336000.0332000.0298000.0
Percentage of RepaymentsOfLongTermCapitalLeaseObligations100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability

us-gaap:RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability


Right
Period End2021-06-302021-03-312020-06-302020-03-31
Value132.0095.8521.99
Percentage of RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability100.0100.0100.0100.0

us-gaap:RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability us-gaap:SubsequentEventType

us-gaap:SubsequentEvent


Right
Period End2021-01-28
Value2.0
Percentage of RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability0.0

us-gaap:RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability

us-gaap:RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability


Right
Period End2021-06-302021-03-312020-06-302020-03-31
Value4.6578.8247.8982.38
Percentage of RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability100.0100.0100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardAcceleratedCompensationCost

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardAcceleratedCompensationCost


Share
Period End2021-06-302020-06-30
Value1200000.0400000.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardAcceleratedCompensationCost100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardAcceleratedCompensationCost us-gaap:AwardType

us-gaap:RestrictedStockUnitsRSU


Share
Period End2020-12-312020-09-302020-06-30
Value04800000.04800000.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardAcceleratedCompensationCost0.00.01200.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod

us-gaap:PerformanceShares


Share
Period End2021-06-302021-03-31
Value012000.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod0.0100.0

us-gaap:RestrictedStockUnitsRSU


Share
Period End2021-06-302021-03-312020-12-31
Value144000.073000.034000.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod0.0608.30.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue

us-gaap:PerformanceShares


Share
Period End2021-06-302021-03-31
Value065.11
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue0.0100.0

us-gaap:RestrictedStockUnitsRSU


Share
Period End2021-06-302021-03-312020-12-31
Value-0.240.381.05
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue0.062.00.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue

us-gaap:PerformanceShares


Share
Period End2021-06-302021-03-31
Value0102.06
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue0.0100.0

us-gaap:RestrictedStockUnitsRSU


Share
Period End2021-06-302021-03-312020-12-31
Value-18.8691.316.6
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue0.089.50.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod

us-gaap:RestrictedStockUnitsRSU


Share
Period End2021-06-302021-03-312020-12-31
Value400000.0471000.0472000.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod100.0100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue

us-gaap:PerformanceShares


Share
Period End2021-06-302021-03-31
Value065.11
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue0.0100.0

us-gaap:RestrictedStock


Share
Period End2021-06-302021-03-31
Value097.84
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue0.0150.3

us-gaap:RestrictedStockUnitsRSU


Share
Period End2021-06-302021-03-312020-12-31
Value3.424.961.4
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue0.038.30.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate

us-gaap:EmployeeStock


Share
Period End2021-03-312020-09-302020-06-302020-03-312019-09-302019-06-30
Value50.051.460.110.4300.364
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate100.0100.0100.0100.00.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate

us-gaap:EmployeeStock


Share
Period End2021-03-312020-09-302020-06-302020-03-312019-09-302019-06-30
Value0.10.8437-0.00960.015900.0235
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate100.0100.0100.0100.00.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue


Share
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value174343815620191.87.73.21.40.5
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod


Share
Period End2021-06-302021-03-312020-12-31
Value101000.083000.022000.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod100.0100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice


Share
Period End2021-06-302021-03-312020-12-31
Value-0.5511.03-0.01
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice100.0100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue


Share
Period End2020-12-312019-12-312019-09-302018-12-312018-09-30
Value80.72-0.280.69-0.440.27
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue100.0100.0100.0100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardPlanModificationIncrementalCompensationCost

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardPlanModificationIncrementalCompensationCost


Share
Period End2021-06-302020-06-30
Value1100000.0300000.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardPlanModificationIncrementalCompensationCost100.0100.0

us-gaap:ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice

us-gaap:ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice


Share
Period End2021-06-302021-03-312020-12-31
Value0.924.530.1
Percentage of ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice100.0100.0100.0

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

us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage

us-gaap:RestrictedStockUnitsRSU, us-gaap:ShareBasedCompensationAwardTrancheOne


Sharebased
Period End2021-06-302021-03-312019-12-31
Value025.00.25
Percentage of SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage0.0100.0100.0

us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedInPeriodFairValue1

us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedInPeriodFairValue1


Sharebased
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value4.74.13.81.92.32.31.71.61.41.40.91.0
Percentage of SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedInPeriodFairValue1100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedNumberOfShares us-gaap:AwardType

us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedNumberOfShares

us-gaap:EmployeeStockOption


Sharebased
Period End2021-06-302021-03-31
Value15000.014000.0
Percentage of SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedNumberOfShares100.0100.0

us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardPurchasePriceOfCommonStockPercent us-gaap:AwardType

us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardPurchasePriceOfCommonStockPercent

us-gaap:EmployeeStock


Sharebased
Period End2021-06-302021-03-312020-12-31
Value085.00
Percentage of SharebasedCompensationArrangementBySharebasedPaymentAwardPurchasePriceOfCommonStockPercent0.0100.00.0

us-gaap:StockIssuedDuringPeriodSharesConversionOfConvertibleSecurities us-gaap:StatementClassOfStock

us-gaap:StockIssuedDuringPeriodSharesConversionOfConvertibleSecurities

us-gaap:CommonClassB


Stock
Period End2021-03-312020-05-262020-06-302020-03-312019-12-312019-09-302019-05-212019-06-30
Value53530.144635530.053530.17238
Percentage of StockIssuedDuringPeriodSharesConversionOfConvertibleSecurities100.0100.0100.0100.00.0100.0100.0100.0

us-gaap:StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans us-gaap:StatementClassOfStock, us-gaap:StatementEquityComponents

us-gaap:StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans

us-gaap:CommonClassA, us-gaap:CommonStock


Stock
Period End2020-12-312020-09-302020-06-30
Value100000.0-26288.0226290.0
Percentage of StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans100.0100.0100.0

us-gaap:StockIssuedDuringPeriodSharesNewIssues us-gaap:StatementClassOfStock, us-gaap:SubsidiarySaleOfStock

us-gaap:StockIssuedDuringPeriodSharesNewIssues

us-gaap:CommonClassA, us-gaap:IPO


Stock
Period End2021-03-312019-05-21
Value1212
Percentage of StockIssuedDuringPeriodSharesNewIssues100.0100.0

us-gaap:StockIssuedDuringPeriodSharesStockOptionsExercised

us-gaap:StockIssuedDuringPeriodSharesStockOptionsExercised


Stock
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-30
Value429000.0600000.0557000.0980000.01716000.01107000.01125000.0107000.0
Percentage of StockIssuedDuringPeriodSharesStockOptionsExercised100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StockIssuedDuringPeriodValueEmployeeStockPurchasePlan

us-gaap:StockIssuedDuringPeriodValueEmployeeStockPurchasePlan


Stock
Period End2021-06-302020-12-312020-09-302020-06-30
Value5719000.03946000.004247000.0
Percentage of StockIssuedDuringPeriodValueEmployeeStockPurchasePlan100.0100.00.0100.0

us-gaap:StockIssuedDuringPeriodValueEmployeeStockPurchasePlan us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Stock
Period End2021-06-302020-12-312020-09-302020-06-30
Value5719000.03946000.004247000.0
Percentage of StockIssuedDuringPeriodValueEmployeeStockPurchasePlan100.0100.00.0100.0

us-gaap:StockIssuedDuringPeriodValueStockOptionsExercised

us-gaap:StockIssuedDuringPeriodValueStockOptionsExercised


Stock
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value2.8862.7192.324.1225.6573.1742.7510.2961.8930.6390.5040.3650.517
Percentage of StockIssuedDuringPeriodValueStockOptionsExercised100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StockIssuedDuringPeriodValueStockOptionsExercised us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital


Stock
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value2.8862.7192.324.1225.6573.1742.7510.2961.8930.6390.5040.3650.517
Percentage of StockIssuedDuringPeriodValueStockOptionsExercised100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:SubleaseIncome

us-gaap:SubleaseIncome


Sublease
Period End2021-06-302021-03-312020-06-302020-03-31
Value200000.0300000.0300000.0300000.0
Percentage of SubleaseIncome100.0100.0100.0100.0

us-gaap:VariableLeaseCost

us-gaap:VariableLeaseCost


Variable
Period End2021-06-302021-03-312020-06-302020-03-31
Value1460000.01358000.01355000.01041000.0
Percentage of VariableLeaseCost100.0100.0100.0100.0

dei:EntityCommonStockSharesOutstanding

dei:EntityCommonStockSharesOutstanding


Entity
Period End2021-07-30
Value116
Percentage of EntityCommonStockSharesOutstanding100.0

dei:EntityCommonStockSharesOutstanding us-gaap:StatementClassOfStock

us-gaap:CommonClassA


Entity
Period End2021-04-302021-02-122020-10-312020-07-312020-05-052020-02-282019-11-062019-08-07
Value1051041029072713913
Percentage of EntityCommonStockSharesOutstanding0.00.00.00.00.00.00.00.0

us-gaap:CommonClassB


Entity
Period End2021-04-302021-02-122020-10-312020-07-312020-05-052020-02-282019-11-062019-08-07
Value9.910111423245480
Percentage of EntityCommonStockSharesOutstanding0.00.00.00.00.00.00.00.0

fsly:AccruedAcquisitionRelatedCosts

fsly:AccruedAcquisitionRelatedCosts


Accrued
Period End2021-03-312020-12-312020-09-30
Value370000.02208000.04436000.0
Percentage of AccruedAcquisitionRelatedCosts100.0100.0100.0

fsly:AccruedAcquisitionRelatedCostsCurrent

fsly:AccruedAcquisitionRelatedCostsCurrent


Accrued
Period End2020-12-31
Value2208000.0
Percentage of AccruedAcquisitionRelatedCostsCurrent100.0

fsly:AccruedColocationAndBandwidthCosts

fsly:AccruedColocationAndBandwidthCosts


Accrued
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value4135000.03903000.03644000.03886000.04059000.02519000.03237000.02055000.02499000.03049000.0
Percentage of AccruedColocationAndBandwidthCosts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

fsly:AccruedComputerAndNetworkingEquipment

fsly:AccruedComputerAndNetworkingEquipment


Accrued
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value6249000.0262000.03126000.08977000.03775000.03896000.07060000.07686000.07752000.00
Percentage of AccruedComputerAndNetworkingEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

fsly:AccruedPayrollTaxesCARESAct

fsly:AccruedPayrollTaxesCARESAct


Accrued
Period End2020-12-312020-09-30
Value3400000.02700000.0
Percentage of AccruedPayrollTaxesCARESAct100.0100.0

fsly:BusinessCombinationAggregateRetentionPoolValue us-gaap:AwardType, us-gaap:BusinessAcquisition, us-gaap:SubsequentEventType

fsly:BusinessCombinationAggregateRetentionPoolValue

us-gaap:RestrictedStockUnitsRSU, fsly:SignalSciencesCorp, us-gaap:SubsequentEvent


Business
Period End2020-10-01
Value50
Percentage of BusinessCombinationAggregateRetentionPoolValue100.0

fsly:BusinessCombinationUnvestedStockOptionAssumedFairValue us-gaap:BusinessAcquisition

fsly:BusinessCombinationUnvestedStockOptionAssumedFairValue

fsly:SignalSciencesCorp


Business
Period End2020-10-01
Value21
Percentage of BusinessCombinationUnvestedStockOptionAssumedFairValue100.0

fsly:BusinessCombinationUnvestedStockOptionsAssumedConversionRatio us-gaap:BusinessAcquisition

fsly:BusinessCombinationUnvestedStockOptionsAssumedConversionRatio

fsly:SignalSciencesCorp


Business
Period End2020-10-01
Value0.1
Percentage of BusinessCombinationUnvestedStockOptionsAssumedConversionRatio100.0

fsly:CashCashEquivalentsAndDebtSecuritiesAvailableForSale

fsly:CashCashEquivalentsAndDebtSecuritiesAvailableForSale


Cash
Period End2021-06-302020-12-31
Value1102214
Percentage of CashCashEquivalentsAndDebtSecuritiesAvailableForSale100.0100.0

fsly:CashCollateralForLineOfCredit us-gaap:SubsequentEventType

fsly:CashCollateralForLineOfCredit

us-gaap:SubsequentEvent


Cash
Period End2020-11-04
Value70
Percentage of CashCollateralForLineOfCredit100.0

fsly:DebtInstrumentFaceAmountAdditionalPrincipalIssuable us-gaap:DebtInstrument, us-gaap:LongtermDebtType

fsly:DebtInstrumentFaceAmountAdditionalPrincipalIssuable

fsly:A2026ConvertibleNotes, us-gaap:ConvertibleDebt


Debt
Period End2021-03-05
Value123
Percentage of DebtInstrumentFaceAmountAdditionalPrincipalIssuable100.0

fsly:DeferredTaxAssetLeaseLiability

fsly:DeferredTaxAssetLeaseLiability


Deferred
Period End2020-12-31
Value17
Percentage of DeferredTaxAssetLeaseLiability100.0

fsly:DeferredTaxLiabilitiesStateTaxes

fsly:DeferredTaxLiabilitiesStateTaxes


Deferred
Period End2020-12-312019-12-312018-12-31
Value4319000.02034000.01706000.0
Percentage of DeferredTaxLiabilitiesStateTaxes100.0100.0100.0

fsly:FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFour

fsly:FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFour


Finite
Period End2021-06-302021-03-312020-09-30
Value25241.158
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFour100.0100.0100.0

fsly:LesseeOperatingLeaseLeaseNotYetCommencedCommitmentAmount

fsly:LesseeOperatingLeaseLeaseNotYetCommencedCommitmentAmount


Lessee
Period End2021-06-302021-03-312020-12-31
Value172.37.9
Percentage of LesseeOperatingLeaseLeaseNotYetCommencedCommitmentAmount100.0100.0100.0

fsly:LesseeOperatingLeaseLiabilityToBePaidAfterYearFour

fsly:LesseeOperatingLeaseLiabilityToBePaidAfterYearFour


Lessee
Period End2021-06-302021-03-31
Value119.451
Percentage of LesseeOperatingLeaseLiabilityToBePaidAfterYearFour100.0100.0

fsly:LiabilityForEarlyExercisedStockOptionsCurrent

fsly:LiabilityForEarlyExercisedStockOptionsCurrent


Liability
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-31
Value255000.0255000.0255000.0257000.0321000.0385000.0467000.0597000.0
Percentage of LiabilityForEarlyExercisedStockOptionsCurrent100.0100.0100.0100.0100.0100.0100.0100.0

fsly:LongTermDebtAndCapitalLeaseObligationsInterestDue

fsly:LongTermDebtAndCapitalLeaseObligationsInterestDue


Long
Period End2020-09-30
Value3288000.0
Percentage of LongTermDebtAndCapitalLeaseObligationsInterestDue100.0

fsly:LongTermDebtAndCapitalLeaseObligationsMaturitiesInterestDueInNextTwelveMonths

fsly:LongTermDebtAndCapitalLeaseObligationsMaturitiesInterestDueInNextTwelveMonths


Long
Period End2020-09-30
Value1350000.0
Percentage of LongTermDebtAndCapitalLeaseObligationsMaturitiesInterestDueInNextTwelveMonths100.0

fsly:LongTermDebtAndCapitalLeaseObligationsMaturitiesInterestDueRemainderOfFiscalYear

fsly:LongTermDebtAndCapitalLeaseObligationsMaturitiesInterestDueRemainderOfFiscalYear


Long
Period End2020-09-30
Value926000.0
Percentage of LongTermDebtAndCapitalLeaseObligationsMaturitiesInterestDueRemainderOfFiscalYear100.0

fsly:LongTermDebtAndCapitalLeaseObligationsMaturitiesInterestDueYearThree

fsly:LongTermDebtAndCapitalLeaseObligationsMaturitiesInterestDueYearThree


Long
Period End2020-09-30
Value30000.0
Percentage of LongTermDebtAndCapitalLeaseObligationsMaturitiesInterestDueYearThree100.0

fsly:LongTermDebtAndCapitalLeaseObligationsMaturitiesInterestDueYearTwo

fsly:LongTermDebtAndCapitalLeaseObligationsMaturitiesInterestDueYearTwo


Long
Period End2020-09-30
Value982000.0
Percentage of LongTermDebtAndCapitalLeaseObligationsMaturitiesInterestDueYearTwo100.0

fsly:LongTermDebtAndCapitalLeaseObligationsMaturitiesTotalPaymentsDueInNextTwelveMonths

fsly:LongTermDebtAndCapitalLeaseObligationsMaturitiesTotalPaymentsDueInNextTwelveMonths


Long
Period End2020-09-30
Value8271000.0
Percentage of LongTermDebtAndCapitalLeaseObligationsMaturitiesTotalPaymentsDueInNextTwelveMonths100.0

fsly:LongtermDebtandCapitalLeaseObligationsMaturitiesTotalPaymentsDue

fsly:LongtermDebtandCapitalLeaseObligationsMaturitiesTotalPaymentsDue


Longterm
Period End2020-09-30
Value39
Percentage of LongtermDebtandCapitalLeaseObligationsMaturitiesTotalPaymentsDue100.0

fsly:LongtermDebtandCapitalLeaseObligationsMaturitiesTotalPaymentsDueRemainderofFiscalYear

fsly:LongtermDebtandCapitalLeaseObligationsMaturitiesTotalPaymentsDueRemainderofFiscalYear


Longterm
Period End2020-09-30
Value2798000.0
Percentage of LongtermDebtandCapitalLeaseObligationsMaturitiesTotalPaymentsDueRemainderofFiscalYear100.0

fsly:LongtermDebtandCapitalLeaseObligationsMaturitiesTotalPaymentsDueYearThree

fsly:LongtermDebtandCapitalLeaseObligationsMaturitiesTotalPaymentsDueYearThree


Longterm
Period End2020-09-30
Value1825000.0
Percentage of LongtermDebtandCapitalLeaseObligationsMaturitiesTotalPaymentsDueYearThree100.0

fsly:LongtermDebtandCapitalLeaseObligationsMaturitiesTotalPaymentsDueYearTwo

fsly:LongtermDebtandCapitalLeaseObligationsMaturitiesTotalPaymentsDueYearTwo


Longterm
Period End2020-09-30
Value26
Percentage of LongtermDebtandCapitalLeaseObligationsMaturitiesTotalPaymentsDueYearTwo100.0

fsly:PrepaidCommissions

fsly:PrepaidCommissions


Prepaid
Period End2021-03-312020-12-31
Value2119
Percentage of PrepaidCommissions100.0100.0

fsly:PurchaseObligationDueAfterFourthYear

fsly:PurchaseObligationDueAfterFourthYear


Purchase
Period End2021-06-302021-03-312020-09-30
Value46000.046000.0816000.0
Percentage of PurchaseObligationDueAfterFourthYear100.0100.0100.0

fsly:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsUnvestedExercisableAggregateIntrinsicValue

fsly:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsUnvestedExercisableAggregateIntrinsicValue


Share
Period End2021-06-302021-03-312020-12-31
Value111625
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsUnvestedExercisableAggregateIntrinsicValue100.0100.0100.0

fsly:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsUnvestedExercisableNumber

fsly:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsUnvestedExercisableNumber


Share
Period End2021-06-302021-03-312020-12-31
Value216000.0268000.0320000.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsUnvestedExercisableNumber100.0100.0100.0

fsly:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsUnvestedExercisableWeightedAverageExercisePrice

fsly:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsUnvestedExercisableWeightedAverageExercisePrice


Share
Period End2021-06-302021-03-312020-12-31
Value6.546.366.23
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsUnvestedExercisableWeightedAverageExercisePrice100.0100.0100.0

us-gaap:AllowanceForDoubtfulAccountsReceivableCurrent

us-gaap:AllowanceForDoubtfulAccountsReceivableCurrent


Allowance
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-312017-12-31
Value2947000.02799000.03248000.02761000.02654000.01821000.01816000.01800000.01525000.01679000.01119000.0
Percentage of AllowanceForDoubtfulAccountsReceivableCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AssetsFairValueDisclosure

us-gaap:AssetsFairValueDisclosure


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value1098111919419844817818920324451
Percentage of AssetsFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AssetsFairValueDisclosure us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:FairValueInputsLevel1


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value683941371063188472502122.419
Percentage of AssetsFairValueDisclosure62.284.119.453.571.147.238.024.786.84.7

us-gaap:FairValueInputsLevel2


Assets
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value41417715692129941171533248
Percentage of AssetsFairValueDisclosure37.815.980.646.528.952.862.075.313.295.3

us-gaap:AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax

us-gaap:AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value11000.047000.0110000.0237000.0431000.0607000.098000.08000.018000.00
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

us-gaap:AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax us-gaap:FinancialInstrument

us-gaap:CorporateDebtSecurities


Available
Period End2020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value17000.043000.065000.009000.08000.014000.00
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax15.518.115.10.09.2100.077.80.0

us-gaap:USTreasurySecurities


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value11000.047000.093000.0194000.0342000.0607000.085000.001000.00
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax100.0100.084.581.979.4100.086.70.05.60.0

us-gaap:AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax

us-gaap:AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax


Available
Period End2021-06-302021-03-312020-12-312020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value131000.020000.05000.0032000.01000.013000.0024000.0
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax100.0100.0100.00.0100.0100.0100.00.0100.0

us-gaap:AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax us-gaap:FinancialInstrument

fsly:ForeignGovernmentAndSupranationalSecurities


Available
Period End2021-06-302021-03-31
Value17000.015000.0
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax13.075.0

us-gaap:AssetBackedSecurities


Available
Period End2021-06-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value3000.005000.006000.008000.0
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax2.30.015.60.046.20.033.3

us-gaap:CorporateDebtSecurities


Available
Period End2021-06-302021-03-312020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value36000.05000.0027000.01000.00015000.0
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax27.525.00.084.4100.00.00.062.5

us-gaap:USTreasurySecurities


Available
Period End2021-06-302020-12-312020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value75000.05000.00007000.001000.0
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax57.3100.00.00.00.053.80.04.2

us-gaap:AvailableForSaleDebtSecuritiesAmortizedCostBasis

us-gaap:AvailableForSaleDebtSecuritiesAmortizedCostBasis


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value41517715192126931141533246
Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AvailableForSaleDebtSecuritiesAmortizedCostBasis us-gaap:FinancialInstrument

fsly:ForeignGovernmentAndSupranationalSecurities


Available
Period End2021-06-302021-03-31
Value3022
Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis7.312.9

us-gaap:AssetBackedSecurities


Available
Period End2021-06-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value21101313136.8887.817
Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis5.28.614.812.19.021.416.7

us-gaap:CommercialPaper


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value166634117472.4985.481191020
Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis40.135.727.319.037.92.74.812.833.543.0

us-gaap:CorporateDebtSecurities


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value30151414179.05117291112
Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis7.48.99.415.613.89.715.219.335.827.6

us-gaap:USTreasurySecurities


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value165759560506878902.9935.933
Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis40.042.663.265.439.772.868.058.89.312.7

us-gaap:AvailableForSaleSecuritiesDebtSecurities

us-gaap:AvailableForSaleSecuritiesDebtSecurities


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value41417715192126941141533246
Percentage of AvailableForSaleSecuritiesDebtSecurities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AvailableForSaleSecuritiesDebtSecurities us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:FairValueInputsLevel2


Available
Period End2021-06-302021-03-312020-12-312019-12-31
Value414177151114
Percentage of AvailableForSaleSecuritiesDebtSecurities100.0100.0100.0100.0

us-gaap:AvailableForSaleSecuritiesDebtSecurities us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FinancialInstrument

us-gaap:FairValueInputsLevel2, fsly:ForeignGovernmentAndSupranationalSecurities


Available
Period End2021-06-302021-03-31
Value3022
Percentage of AvailableForSaleSecuritiesDebtSecurities7.312.8

us-gaap:FairValueInputsLevel2, us-gaap:AssetBackedSecurities


Available
Period End2021-06-302019-12-31
Value2113
Percentage of AvailableForSaleSecuritiesDebtSecurities5.212.1

us-gaap:FairValueInputsLevel2, us-gaap:CommercialPaper


Available
Period End2021-06-302021-03-312020-12-312019-12-31
Value16663415.481
Percentage of AvailableForSaleSecuritiesDebtSecurities40.135.627.34.8

us-gaap:FairValueInputsLevel2, us-gaap:CorporateDebtSecurities


Available
Period End2021-06-302021-03-312020-12-312019-12-31
Value30151417
Percentage of AvailableForSaleSecuritiesDebtSecurities7.48.99.415.2

us-gaap:FairValueInputsLevel2, us-gaap:USTreasurySecurities


Available
Period End2021-06-302021-03-312020-12-312019-12-31
Value165759578
Percentage of AvailableForSaleSecuritiesDebtSecurities40.042.663.368.0

us-gaap:AvailableForSaleSecuritiesDebtSecurities us-gaap:FinancialInstrument

fsly:ForeignGovernmentAndSupranationalSecurities


Available
Period End2021-06-302021-03-31
Value3022
Percentage of AvailableForSaleSecuritiesDebtSecurities7.312.8

us-gaap:AssetBackedSecurities


Available
Period End2021-06-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value21101313136.8917.809
Percentage of AvailableForSaleSecuritiesDebtSecurities5.28.614.712.19.021.416.7

us-gaap:CommercialPaper


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value166634117472.4985.481191020
Percentage of AvailableForSaleSecuritiesDebtSecurities40.135.627.318.937.82.74.812.833.543.0

us-gaap:CorporateDebtSecurities


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value30151414179.02417291112
Percentage of AvailableForSaleSecuritiesDebtSecurities7.48.99.415.613.89.615.219.335.827.5

us-gaap:USTreasurySecurities


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value165759560506878902.9945.932
Percentage of AvailableForSaleSecuritiesDebtSecurities40.042.663.365.539.873.068.058.89.312.7

us-gaap:AvailableForSaleSecuritiesDebtSecuritiesCurrent

us-gaap:AvailableForSaleSecuritiesDebtSecuritiesCurrent


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value24114713192126941141533246
Percentage of AvailableForSaleSecuritiesDebtSecuritiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AvailableForSaleSecuritiesDebtSecuritiesCurrent us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:FairValueInputsLevel2


Available
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value92126941141533246
Percentage of AvailableForSaleSecuritiesDebtSecuritiesCurrent100.0100.0100.0100.0100.0100.0100.0

us-gaap:AvailableForSaleSecuritiesDebtSecuritiesCurrent us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FinancialInstrument

us-gaap:FairValueInputsLevel2, us-gaap:CommercialPaper


Available
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value17472.4985.481191020
Percentage of AvailableForSaleSecuritiesDebtSecuritiesCurrent18.937.82.74.812.833.543.0

us-gaap:FairValueInputsLevel2, us-gaap:CorporateDebtSecurities


Available
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value14179.02417291112
Percentage of AvailableForSaleSecuritiesDebtSecuritiesCurrent15.613.89.615.219.335.827.5

us-gaap:FairValueInputsLevel2, us-gaap:USTreasurySecurities


Available
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value60506878902.9945.932
Percentage of AvailableForSaleSecuritiesDebtSecuritiesCurrent65.539.873.068.058.89.312.7

us-gaap:AvailableForSaleSecuritiesDebtSecuritiesCurrent us-gaap:FinancialInstrument

fsly:ForeignGovernmentAndSupranationalSecurities


Available
Period End2021-06-30
Value10
Percentage of AvailableForSaleSecuritiesDebtSecuritiesCurrent4.2

us-gaap:CommercialPaper


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value166634117472.4985.481191020
Percentage of AvailableForSaleSecuritiesDebtSecuritiesCurrent68.842.931.618.937.82.74.812.833.543.0

us-gaap:CorporateDebtSecurities


Available
Period End2021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value8.7531414179.02417291112
Percentage of AvailableForSaleSecuritiesDebtSecuritiesCurrent5.910.915.613.89.615.219.335.827.5

us-gaap:USTreasurySecurities


Available
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value65757560506878902.9945.932
Percentage of AvailableForSaleSecuritiesDebtSecuritiesCurrent27.151.257.565.539.873.068.058.89.312.7

us-gaap:AvailableForSaleSecuritiesDebtSecuritiesNoncurrent

us-gaap:AvailableForSaleSecuritiesDebtSecuritiesNoncurrent


Available
Period End2021-06-302021-03-312020-12-31
Value1732920
Percentage of AvailableForSaleSecuritiesDebtSecuritiesNoncurrent100.0100.0100.0

us-gaap:AvailableForSaleSecuritiesDebtSecuritiesNoncurrent us-gaap:FinancialInstrument

fsly:ForeignGovernmentAndSupranationalSecurities


Available
Period End2021-06-302021-03-31
Value2022
Percentage of AvailableForSaleSecuritiesDebtSecuritiesNoncurrent11.876.3

us-gaap:AssetBackedSecurities


Available
Period End2021-06-30
Value21
Percentage of AvailableForSaleSecuritiesDebtSecuritiesNoncurrent12.6

us-gaap:CorporateDebtSecurities


Available
Period End2021-06-302021-03-312020-12-31
Value307.09520
Percentage of AvailableForSaleSecuritiesDebtSecuritiesNoncurrent17.623.7100.0

us-gaap:USTreasurySecurities


Available
Period End2021-06-302020-12-31
Value10020
Percentage of AvailableForSaleSecuritiesDebtSecuritiesNoncurrent58.0100.0

us-gaap:BusinessAcquisitionEquityInterestIssuedOrIssuableValueAssigned us-gaap:BusinessAcquisition

us-gaap:BusinessAcquisitionEquityInterestIssuedOrIssuableValueAssigned

fsly:SignalSciencesCorp


Business
Period End2020-10-01
Value536
Percentage of BusinessAcquisitionEquityInterestIssuedOrIssuableValueAssigned100.0

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets

fsly:SignalSciencesCorp


Business
Period End2020-10-01
Value160
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets100.0

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents

fsly:SignalSciencesCorp


Business
Period End2020-10-01
Value21
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents100.0

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsOther us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsOther

fsly:SignalSciencesCorp


Business
Period End2020-10-01
Value6419000.0
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsOther100.0

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilities us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilities

fsly:SignalSciencesCorp


Business
Period End2020-10-01
Value14
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilities100.0

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles

fsly:SignalSciencesCorp


Business
Period End2020-10-01
Value124
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles100.0

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles us-gaap:BusinessAcquisition, us-gaap:FiniteLivedIntangibleAssetsByMajorClass

fsly:SignalSciencesCorp, us-gaap:CustomerRelationships


Business
Period End2020-10-01
Value69
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles55.7

fsly:SignalSciencesCorp, us-gaap:DevelopedTechnologyRights


Business
Period End2020-10-01
Value49
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles39.9

fsly:SignalSciencesCorp, us-gaap:OrderOrProductionBacklog


Business
Period End2020-10-01
Value2.2
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles1.8

fsly:SignalSciencesCorp, us-gaap:TradeNames


Business
Period End2020-10-01
Value3.3
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles2.7

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities

fsly:SignalSciencesCorp


Business
Period End2020-10-01
Value35
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedLiabilities100.0

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet

fsly:SignalSciencesCorp


Business
Period End2020-10-01
Value124
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet100.0

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilities us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilities

fsly:SignalSciencesCorp


Business
Period End2020-10-01
Value21
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilities100.0

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherNoncurrentAssets us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherNoncurrentAssets

fsly:SignalSciencesCorp


Business
Period End2020-10-01
Value8094000.0
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherNoncurrentAssets100.0

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet us-gaap:BusinessAcquisition

us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet

fsly:SignalSciencesCorp


Business
Period End2020-10-01
Value759
Percentage of BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet100.0

us-gaap:CapitalLeaseObligations

us-gaap:CapitalLeaseObligations


Capital
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value119.9119.57.46.63.5
Percentage of CapitalLeaseObligations100.0100.0100.0100.0100.0100.0100.0

us-gaap:CapitalLeaseObligationsCurrent

us-gaap:CapitalLeaseObligationsCurrent


Capital
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value6060000.05188000.05291000.04472000.03505000.02822000.01370000.0
Percentage of CapitalLeaseObligationsCurrent100.0100.0100.0100.0100.0100.0100.0

us-gaap:CapitalLeaseObligationsNoncurrent

us-gaap:CapitalLeaseObligationsNoncurrent


Capital
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value5868000.04738000.05943000.05077000.03878000.03779000.02168000.0
Percentage of CapitalLeaseObligationsNoncurrent100.0100.0100.0100.0100.0100.0100.0

us-gaap:CapitalizedContractCostNetNoncurrent

us-gaap:CapitalizedContractCostNetNoncurrent


Capitalized
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-01-01
Value222119119.6987.9446.8046.1476.5145.727
Percentage of CapitalizedContractCostNetNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CashEquivalentsAtCarryingValue

us-gaap:CashEquivalentsAtCarryingValue


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value6829404136251134.519502124.417
Percentage of CashEquivalentsAtCarryingValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CashEquivalentsAtCarryingValue us-gaap:CashAndCashEquivalents

us-gaap:CommercialPaper


Cash
Period End2020-12-312020-06-302019-12-31
Value4.9982.9992.499
Percentage of CashEquivalentsAtCarryingValue12.01.255.3

us-gaap:MoneyMarketFunds


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value6829403636248132.02502122.419
Percentage of CashEquivalentsAtCarryingValue100.0100.088.0100.098.8100.044.7100.0100.054.8

us-gaap:CashEquivalentsAtCarryingValue us-gaap:CashAndCashEquivalents, us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:CommercialPaper, us-gaap:FairValueInputsLevel2


Cash
Period End2020-12-312020-06-302019-12-31
Value4.9982.9992.499
Percentage of CashEquivalentsAtCarryingValue12.01.255.3

us-gaap:MoneyMarketFunds, us-gaap:FairValueInputsLevel1


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value6829403636248132.02502122.419
Percentage of CashEquivalentsAtCarryingValue100.0100.088.0100.098.8100.044.7100.0100.054.8

us-gaap:CashEquivalentsAtCarryingValue us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:FairValueInputsLevel1


Cash
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value6829403636248132.02502122.419
Percentage of CashEquivalentsAtCarryingValue100.0100.088.0100.098.8100.044.7100.0100.054.8

us-gaap:FairValueInputsLevel2


Cash
Period End2020-12-312020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value4.9982.9990.02.4990.00.01.998
Percentage of CashEquivalentsAtCarryingValue12.01.20.055.30.00.045.2

us-gaap:CommonStockCapitalSharesReservedForFutureIssuance us-gaap:AwardType, us-gaap:StatementClassOfStock

us-gaap:CommonStockCapitalSharesReservedForFutureIssuance

us-gaap:EmployeeStock, us-gaap:CommonClassA


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value4.64.63.53.53.52.5
Percentage of CommonStockCapitalSharesReservedForFutureIssuance100.0100.0100.0100.0100.0100.0

us-gaap:CommonStockCapitalSharesReservedForFutureIssuance us-gaap:PlanName, us-gaap:StatementClassOfStock

fsly:A2019EquityIncentivePlan, us-gaap:CommonClassA


Common
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value25251919191914
Percentage of CommonStockCapitalSharesReservedForFutureIssuance545.7545.7554.3548.6548.60.0576.0

us-gaap:ContractWithCustomerAssetNet

us-gaap:ContractWithCustomerAssetNet


Contract
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-31
Value209000.0289000.0387000.0403000.0322000.0305000.0271000.00
Percentage of ContractWithCustomerAssetNet100.0100.0100.0100.0100.0100.0100.00.0

us-gaap:ContractWithCustomerLiability

us-gaap:ContractWithCustomerLiability


Contract
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-01-01
Value2719180.0420.0480.8520.3170.6490.6531.622
Percentage of ContractWithCustomerLiability100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ContractWithCustomerLiabilityNoncurrent

us-gaap:ContractWithCustomerLiabilityNoncurrent


Contract
Period End2021-06-302021-03-312020-12-31
Value4569000.01290000.02104000.0
Percentage of ContractWithCustomerLiabilityNoncurrent100.0100.0100.0

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

us-gaap:DebtInstrumentFaceAmount

fsly:A2026ConvertibleNotes, us-gaap:ConvertibleDebt


Debt
Period End2021-03-05
Value948
Percentage of DebtInstrumentFaceAmount100.0

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

us-gaap:DebtInstrumentInterestRateEffectivePercentage

fsly:CreditAgreement, us-gaap:LineOfCredit


Debt
Period End2020-11-30
Value3.46
Percentage of DebtInstrumentInterestRateEffectivePercentage100.0

us-gaap:DebtInstrumentUnamortizedDiscount us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:DebtInstrumentUnamortizedDiscount

fsly:A2026ConvertibleNotes, us-gaap:ConvertibleDebt


Debt
Period End2021-06-302021-03-31
Value1718
Percentage of DebtInstrumentUnamortizedDiscount100.0100.0

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

us-gaap:DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet

fsly:A2026ConvertibleNotes, us-gaap:ConvertibleDebt


Debt
Period End2021-03-05
Value18
Percentage of DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet100.0

us-gaap:DebtIssuanceCostsLineOfCreditArrangementsNet

us-gaap:DebtIssuanceCostsLineOfCreditArrangementsNet


Debt
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value161000.0180000.0200000.0219000.0068000.01896000.0
Percentage of DebtIssuanceCostsLineOfCreditArrangementsNet100.0100.0100.0100.00.0100.0100.0

us-gaap:DeferredFinanceCostsGross us-gaap:DebtInstrument

us-gaap:DeferredFinanceCostsGross

fsly:SVBRevolver


Deferred
Period End2021-02-16
Value600000.0
Percentage of DeferredFinanceCostsGross100.0

us-gaap:DeferredIncomeTaxLiabilities

us-gaap:DeferredIncomeTaxLiabilities


Deferred
Period End2020-12-312019-12-312018-12-31
Value522.3191.918
Percentage of DeferredIncomeTaxLiabilities100.0100.0100.0

us-gaap:DeferredRentCreditNoncurrent

us-gaap:DeferredRentCreditNoncurrent


Deferred
Period End2020-09-302020-06-302020-03-312019-12-312018-12-31
Value3731000.02256000.01016000.0634000.0272000.0
Percentage of DeferredRentCreditNoncurrent100.0100.0100.0100.0100.0

us-gaap:DeferredTaxAssetsGross

us-gaap:DeferredTaxAssetsGross


Deferred
Period End2020-12-312019-12-312018-12-31
Value1323630
Percentage of DeferredTaxAssetsGross100.0100.0100.0

us-gaap:DeferredTaxAssetsOperatingLossCarryforwards

us-gaap:DeferredTaxAssetsOperatingLossCarryforwards


Deferred
Period End2020-12-312019-12-312018-12-31
Value1093025
Percentage of DeferredTaxAssetsOperatingLossCarryforwards100.0100.0100.0

us-gaap:DeferredTaxAssetsPropertyPlantAndEquipment

us-gaap:DeferredTaxAssetsPropertyPlantAndEquipment


Deferred
Period End2020-12-31
Value576000.0
Percentage of DeferredTaxAssetsPropertyPlantAndEquipment100.0

us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost

us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost


Deferred
Period End2020-12-312019-12-312018-12-31
Value3969000.01116000.0686000.0
Percentage of DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost100.0100.0100.0

us-gaap:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccruals

us-gaap:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccruals


Deferred
Period End2020-12-312019-12-312018-12-31
Value941000.01839000.01892000.0
Percentage of DeferredTaxAssetsTaxDeferredExpenseReservesAndAccruals100.0100.0100.0

us-gaap:DeferredTaxLiabilitiesGoodwillAndIntangibleAssets

us-gaap:DeferredTaxLiabilitiesGoodwillAndIntangibleAssets


Deferred
Period End2020-12-31
Value31
Percentage of DeferredTaxLiabilitiesGoodwillAndIntangibleAssets100.0

us-gaap:DeferredTaxLiabilitiesLeasingArrangements

us-gaap:DeferredTaxLiabilitiesLeasingArrangements


Deferred
Period End2020-12-31
Value16
Percentage of DeferredTaxLiabilitiesLeasingArrangements100.0

us-gaap:DeferredTaxLiabilitiesOther

us-gaap:DeferredTaxLiabilitiesOther


Deferred
Period End2020-12-31
Value133000.0
Percentage of DeferredTaxLiabilitiesOther100.0

us-gaap:DeferredTaxLiabilitiesTaxDeferredIncome

us-gaap:DeferredTaxLiabilitiesTaxDeferredIncome


Deferred
Period End2020-12-31
Value673000.0
Percentage of DeferredTaxLiabilitiesTaxDeferredIncome100.0

us-gaap:EmployeeRelatedLiabilitiesCurrent

us-gaap:EmployeeRelatedLiabilitiesCurrent


Employee
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value112017219.1769.6668.7347.4445.4953.952
Percentage of EmployeeRelatedLiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized us-gaap:AwardType

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized

us-gaap:EmployeeStock


Employee
Period End2020-12-31
Value1.9
Percentage of EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized100.0

us-gaap:PerformanceShares


Employee
Period End2021-06-302021-03-312020-12-31
Value4.48.33.4
Percentage of EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized0.00.0178.9

us-gaap:RestrictedStock


Employee
Period End2021-06-302021-03-312020-12-31
Value546576
Percentage of EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized0.00.04031.6

us-gaap:RestrictedStockUnitsRSU


Employee
Period End2021-06-302021-03-312020-12-312020-09-30
Value18114512492
Percentage of EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized0.00.06552.60.0

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions

us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions


Employee
Period End2021-06-302021-03-312020-12-312020-09-30
Value18232812
Percentage of EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions100.0100.0100.0100.0

us-gaap:FinanceLeaseLiability

us-gaap:FinanceLeaseLiability


Finance
Period End2021-06-302021-03-312020-12-31
Value342425
Percentage of FinanceLeaseLiability100.0100.0100.0

us-gaap:FinanceLeaseLiabilityCurrent

us-gaap:FinanceLeaseLiabilityCurrent


Finance
Period End2021-06-302021-03-312020-12-312019-12-31
Value1410114.472
Percentage of FinanceLeaseLiabilityCurrent100.0100.0100.0100.0

us-gaap:FinanceLeaseLiabilityNoncurrent

us-gaap:FinanceLeaseLiabilityNoncurrent


Finance
Period End2021-06-302021-03-312020-12-312019-12-31
Value1913145.077
Percentage of FinanceLeaseLiabilityNoncurrent100.0100.0100.0100.0

us-gaap:FinanceLeaseLiabilityPaymentsDue

us-gaap:FinanceLeaseLiabilityPaymentsDue


Finance
Period End2021-06-302021-03-312020-12-31
Value362627
Percentage of FinanceLeaseLiabilityPaymentsDue100.0100.0100.0

us-gaap:FinanceLeaseLiabilityPaymentsDueNextTwelveMonths

us-gaap:FinanceLeaseLiabilityPaymentsDueNextTwelveMonths


Finance
Period End2021-06-302021-03-312020-12-31
Value151012
Percentage of FinanceLeaseLiabilityPaymentsDueNextTwelveMonths100.0100.0100.0

us-gaap:FinanceLeaseLiabilityPaymentsDueYearThree

us-gaap:FinanceLeaseLiabilityPaymentsDueYearThree


Finance
Period End2021-06-302021-03-312020-12-31
Value1675000.060000.05921000.0
Percentage of FinanceLeaseLiabilityPaymentsDueYearThree100.0100.0100.0

us-gaap:FinanceLeaseLiabilityPaymentsDueYearTwo

us-gaap:FinanceLeaseLiabilityPaymentsDueYearTwo


Finance
Period End2021-06-302021-03-312020-12-31
Value116.6429.447
Percentage of FinanceLeaseLiabilityPaymentsDueYearTwo100.0100.0100.0

us-gaap:FinanceLeaseLiabilityPaymentsRemainderOfFiscalYear

us-gaap:FinanceLeaseLiabilityPaymentsRemainderOfFiscalYear


Finance
Period End2021-06-302021-03-31
Value8403000.09215000.0
Percentage of FinanceLeaseLiabilityPaymentsRemainderOfFiscalYear100.0100.0

us-gaap:FinanceLeaseLiabilityUndiscountedExcessAmount

us-gaap:FinanceLeaseLiabilityUndiscountedExcessAmount


Finance
Period End2021-06-302021-03-312020-12-31
Value2122000.01528000.01742000.0
Percentage of FinanceLeaseLiabilityUndiscountedExcessAmount100.0100.0100.0

us-gaap:FinanceLeaseRightOfUseAssetAccumulatedAmortization

us-gaap:FinanceLeaseRightOfUseAssetAccumulatedAmortization


Finance
Period End2021-06-302021-03-312020-12-312019-12-31
Value9100000.07900000.06700000.03800000.0
Percentage of FinanceLeaseRightOfUseAssetAccumulatedAmortization100.0100.0100.0100.0

us-gaap:FinanceLeaseRightOfUseAssetBeforeAccumulatedAmortization

us-gaap:FinanceLeaseRightOfUseAssetBeforeAccumulatedAmortization


Finance
Period End2021-06-302021-03-312020-12-312019-12-31
Value51383613
Percentage of FinanceLeaseRightOfUseAssetBeforeAccumulatedAmortization100.0100.0100.0100.0

us-gaap:FinanceLeaseWeightedAverageDiscountRatePercent

us-gaap:FinanceLeaseWeightedAverageDiscountRatePercent


Finance
Period End2021-06-302021-03-312020-12-31
Value5.145.15.12
Percentage of FinanceLeaseWeightedAverageDiscountRatePercent100.0100.0100.0

us-gaap:FiniteLivedIntangibleAssetsAccumulatedAmortization

us-gaap:FiniteLivedIntangibleAssetsAccumulatedAmortization


Finite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value16115.6560.5060.4340.3980.3620.3260.2890.242
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FiniteLivedIntangibleAssetsAccumulatedAmortization us-gaap:FiniteLivedIntangibleAssetsByMajorClass

fsly:InternetProtocolAddresses


Finite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value0.7230.650.5780.5060.4340.3980.3620.3260.2890.242
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization4.45.910.2100.0100.0100.0100.0100.0100.0100.0

us-gaap:CustomerRelationships


Finite
Period End2021-06-302021-03-312020-12-31
Value6.4784.3192.053
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization39.839.236.3

us-gaap:DevelopedTechnologyRights


Finite
Period End2021-06-302021-03-312020-12-31
Value7.4254.952.475
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization45.644.943.8

us-gaap:OrderOrProductionBacklog


Finite
Period End2021-06-302021-03-312020-12-31
Value0.8250.550.275
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization5.15.04.9

us-gaap:TradeNames


Finite
Period End2021-06-302021-03-312020-12-31
Value0.8250.550.275
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization5.15.04.9

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive


Finite
Period End2020-12-31
Value24
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths


Finite
Period End2021-06-302021-03-312020-12-312020-09-30
Value2020210.298
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths100.0100.0100.0100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear


Finite
Period End2021-06-302021-03-312020-09-30
Value10150.072
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear100.0100.0100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFive

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFive


Finite
Period End2020-12-31
Value16
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseYearFive100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFour

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFour


Finite
Period End2021-06-302021-03-312020-12-312020-09-30
Value1616180.292
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseYearFour100.0100.0100.0100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearThree

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearThree


Finite
Period End2021-06-302021-03-312020-12-312020-09-30
Value1918190.302
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseYearThree100.0100.0100.0100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo


Finite
Period End2021-06-302021-03-312020-12-312020-09-30
Value1919200.302
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo100.0100.0100.0100.0

us-gaap:FiniteLivedIntangibleAssetsGross us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:FiniteLivedIntangibleAssetsGross

fsly:InternetProtocolAddresses


Finite
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value4.9842.8912.8912.8912.8911.4481.4481.4481.4480.852
Percentage of FiniteLivedIntangibleAssetsGross100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InternetDomainNames


Finite
Period End2021-06-302021-03-312020-12-312020-03-312019-12-312019-09-302019-06-302018-12-31
Value0.0390.0390.0390.0390.0390.0390.0390.0
Percentage of FiniteLivedIntangibleAssetsGross0.81.31.32.72.72.72.70.0

us-gaap:IntangibleAssetsGrossExcludingGoodwill

us-gaap:IntangibleAssetsGrossExcludingGoodwill


Intangible
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value1291271273.2983.2981.487
Percentage of IntangibleAssetsGrossExcludingGoodwill100.0100.0100.0100.0100.0100.0

us-gaap:LesseeFinanceLeaseDiscountRate us-gaap:SubsequentEventType

us-gaap:LesseeFinanceLeaseDiscountRate

us-gaap:SubsequentEvent


Lessee
Period End2021-01-28
Value4.89
Percentage of LesseeFinanceLeaseDiscountRate100.0

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths


Lessee
Period End2021-06-302021-03-312020-12-31
Value191723
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths100.0100.0100.0

us-gaap:LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear

us-gaap:LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear


Lessee
Period End2021-06-302021-03-31
Value2423
Percentage of LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear100.0100.0

us-gaap:LineOfCredit

us-gaap:LineOfCredit


Line
Period End2020-11-302020-11-042020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value202020202020214449
Percentage of LineOfCredit100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LineOfCredit us-gaap:SubsequentEventType

us-gaap:SubsequentEvent


Line
Period End2020-11-04
Value20
Percentage of LineOfCredit100.0

us-gaap:LongTermDebtAndCapitalLeaseObligationsMaturitiesRepaymentsOfPrincipalInYearThree

us-gaap:LongTermDebtAndCapitalLeaseObligationsMaturitiesRepaymentsOfPrincipalInYearThree


Long
Period End2020-09-30
Value1795000.0
Percentage of LongTermDebtAndCapitalLeaseObligationsMaturitiesRepaymentsOfPrincipalInYearThree100.0

us-gaap:LongTermDebtAndCapitalLeaseObligationsMaturitiesRepaymentsOfPrincipalInYearTwo

us-gaap:LongTermDebtAndCapitalLeaseObligationsMaturitiesRepaymentsOfPrincipalInYearTwo


Long
Period End2020-09-30
Value25
Percentage of LongTermDebtAndCapitalLeaseObligationsMaturitiesRepaymentsOfPrincipalInYearTwo100.0

us-gaap:LongTermDebtAndCapitalLeaseObligationsMaturitiesRepaymentsOfPrincipalRemainderOfFiscalYear

us-gaap:LongTermDebtAndCapitalLeaseObligationsMaturitiesRepaymentsOfPrincipalRemainderOfFiscalYear


Long
Period End2020-09-30
Value1872000.0
Percentage of LongTermDebtAndCapitalLeaseObligationsMaturitiesRepaymentsOfPrincipalRemainderOfFiscalYear100.0

us-gaap:LongTermDebtAndCapitalLeaseObligationsRepaymentsOfPrincipalInNextTwelveMonths

us-gaap:LongTermDebtAndCapitalLeaseObligationsRepaymentsOfPrincipalInNextTwelveMonths


Long
Period End2020-09-30
Value6921000.0
Percentage of LongTermDebtAndCapitalLeaseObligationsRepaymentsOfPrincipalInNextTwelveMonths100.0

us-gaap:LongTermLineOfCredit

us-gaap:LongTermLineOfCredit


Long
Period End2020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value20202020111437
Percentage of LongTermLineOfCredit100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingLeaseWeightedAverageDiscountRatePercent

us-gaap:OperatingLeaseWeightedAverageDiscountRatePercent


Operating
Period End2021-06-302021-03-312020-12-31
Value5.565.625.68
Percentage of OperatingLeaseWeightedAverageDiscountRatePercent100.0100.0100.0

us-gaap:OperatingLossCarryforwards us-gaap:IncomeTaxAuthority

us-gaap:OperatingLossCarryforwards

us-gaap:DomesticCountry


Operating
Period End2020-12-312019-12-31
Value395106
Percentage of OperatingLossCarryforwards100.0100.0

us-gaap:StateAndLocalJurisdiction


Operating
Period End2020-12-312019-12-31
Value316100
Percentage of OperatingLossCarryforwards79.994.3

us-gaap:OtherAssetsMiscellaneousNoncurrent

us-gaap:OtherAssetsMiscellaneousNoncurrent


Other
Period End2021-06-302021-03-312020-12-31
Value4608000.05014000.04692000.0
Percentage of OtherAssetsMiscellaneousNoncurrent100.0100.0100.0

us-gaap:OtherLiabilities us-gaap:AwardType

us-gaap:OtherLiabilities

us-gaap:EmployeeStockOption


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-312017-12-31
Value300000.0300000.0400000.0500000.0600000.0700000.0900000.01000000.01200000.01000000.0300000.0
Percentage of OtherLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherSundryLiabilitiesCurrent

us-gaap:OtherSundryLiabilitiesCurrent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-31
Value564000.0348000.0380000.0279000.0258000.0297000.0325000.0293000.0
Percentage of OtherSundryLiabilitiesCurrent100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherSundryLiabilitiesNoncurrent

us-gaap:OtherSundryLiabilitiesNoncurrent


Other
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-31
Value257000.0554000.0620000.0213000.0277000.0341000.0404000.0375000.0
Percentage of OtherSundryLiabilitiesNoncurrent100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAccumulatedDepreciationAndAmortization

us-gaap:PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAccumulatedDepreciationAndAmortization


Property
Period End2020-12-312019-12-31
Value6148
Percentage of PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAccumulatedDepreciationAndAmortization100.0100.0

us-gaap:PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization

us-gaap:PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization


Property
Period End2020-12-312019-12-31
Value9560
Percentage of PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization100.0100.0

us-gaap:PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization us-gaap:PropertyPlantAndEquipmentByType

us-gaap:SoftwareDevelopment


Property
Period End2020-12-312019-12-31
Value148.5
Percentage of PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization14.814.2

us-gaap:PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization

us-gaap:PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization


Property
Period End2020-12-312019-12-31
Value157108
Percentage of PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization100.0100.0

us-gaap:PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization us-gaap:PropertyPlantAndEquipmentByType

us-gaap:ComputerEquipment


Property
Period End2020-12-312019-12-31
Value12989
Percentage of PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization82.583.0

us-gaap:FurnitureAndFixtures


Property
Period End2020-12-312019-12-31
Value1.0920.681
Percentage of PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization0.70.6

us-gaap:LeaseholdImprovements


Property
Period End2020-12-312019-12-31
Value3.8173.285
Percentage of PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization2.43.0

us-gaap:OfficeEquipment


Property
Period End2020-12-312019-12-31
Value0.6590.579
Percentage of PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization0.40.5

us-gaap:SoftwareDevelopment


Property
Period End2020-12-312019-12-31
Value2213
Percentage of PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization14.012.8

us-gaap:PurchaseObligation

us-gaap:PurchaseObligation


Purchase
Period End2021-06-302021-03-312020-12-312020-09-302019-12-31
Value8655596264
Percentage of PurchaseObligation100.0100.0100.0100.0100.0

us-gaap:PurchaseObligation us-gaap:RecordedUnconditionalPurchaseObligationByCategoryOfItemPurchased

fsly:CostOfRevenueCommitment


Purchase
Period End2021-06-302021-03-312020-12-312019-12-31
Value55293162
Percentage of PurchaseObligation64.054.053.496.2

fsly:SaaSAgreementsPurchaseCommitments


Purchase
Period End2021-06-302021-03-312020-12-312019-12-31
Value3125272.419
Percentage of PurchaseObligation36.046.046.63.8

us-gaap:PurchaseObligationDueInFourthYear

us-gaap:PurchaseObligationDueInFourthYear


Purchase
Period End2021-06-302021-03-312020-09-302019-12-31
Value1642000.042000.0523000.0142000.0
Percentage of PurchaseObligationDueInFourthYear100.0100.0100.0100.0

us-gaap:PurchaseObligationDueInFourthYear us-gaap:RecordedUnconditionalPurchaseObligationByCategoryOfItemPurchased

fsly:CostOfRevenueCommitment


Purchase
Period End2021-06-302021-03-312019-12-31
Value1642000.042000.0142000.0
Percentage of PurchaseObligationDueInFourthYear100.0100.0100.0

us-gaap:PurchaseObligationDueInNextTwelveMonths

us-gaap:PurchaseObligationDueInNextTwelveMonths


Purchase
Period End2021-06-302021-03-312020-12-312020-09-302019-12-31
Value3416353546
Percentage of PurchaseObligationDueInNextTwelveMonths100.0100.0100.0100.0100.0

us-gaap:PurchaseObligationDueInNextTwelveMonths us-gaap:RecordedUnconditionalPurchaseObligationByCategoryOfItemPurchased

fsly:CostOfRevenueCommitment


Purchase
Period End2021-06-302021-03-312020-12-312019-12-31
Value217.8212545
Percentage of PurchaseObligationDueInNextTwelveMonths61.446.572.696.8

fsly:SaaSAgreementsPurchaseCommitments


Purchase
Period End2021-06-302021-03-312020-12-312019-12-31
Value139.0099.7851.509
Percentage of PurchaseObligationDueInNextTwelveMonths38.653.527.43.2

us-gaap:PurchaseObligationDueInSecondYear

us-gaap:PurchaseObligationDueInSecondYear


Purchase
Period End2021-06-302021-03-312020-12-312020-09-302019-12-31
Value139.055141012
Percentage of PurchaseObligationDueInSecondYear100.0100.0100.0100.0100.0

us-gaap:PurchaseObligationDueInSecondYear us-gaap:RecordedUnconditionalPurchaseObligationByCategoryOfItemPurchased

fsly:CostOfRevenueCommitment


Purchase
Period End2021-06-302021-03-312020-12-312019-12-31
Value4.4740.0555.89411
Percentage of PurchaseObligationDueInSecondYear32.70.639.592.9

fsly:SaaSAgreementsPurchaseCommitments


Purchase
Period End2021-06-302021-03-312020-12-312019-12-31
Value9.1899.09.0090.91
Percentage of PurchaseObligationDueInSecondYear67.399.460.57.1

us-gaap:PurchaseObligationDueInThirdYear

us-gaap:PurchaseObligationDueInThirdYear


Purchase
Period End2021-06-302021-03-312020-12-312020-09-302019-12-31
Value2592000.042000.09000000.03141000.04457000.0
Percentage of PurchaseObligationDueInThirdYear100.0100.0100.0100.0100.0

us-gaap:PurchaseObligationDueInThirdYear us-gaap:RecordedUnconditionalPurchaseObligationByCategoryOfItemPurchased

fsly:CostOfRevenueCommitment


Purchase
Period End2021-06-302021-03-312019-12-31
Value2592000.042000.04457000.0
Percentage of PurchaseObligationDueInThirdYear100.0100.0100.0

fsly:SaaSAgreementsPurchaseCommitments


Purchase
Period End2020-12-312019-12-31
Value9000000.00
Percentage of PurchaseObligationDueInThirdYear100.00.0

us-gaap:PurchaseObligationFutureMinimumPaymentsRemainderOfFiscalYear

us-gaap:PurchaseObligationFutureMinimumPaymentsRemainderOfFiscalYear


Purchase
Period End2021-06-302021-03-312020-09-30
Value332812
Percentage of PurchaseObligationFutureMinimumPaymentsRemainderOfFiscalYear100.0100.0100.0

us-gaap:PurchaseObligationFutureMinimumPaymentsRemainderOfFiscalYear us-gaap:RecordedUnconditionalPurchaseObligationByCategoryOfItemPurchased

fsly:CostOfRevenueCommitment


Purchase
Period End2021-06-302021-03-31
Value2521
Percentage of PurchaseObligationFutureMinimumPaymentsRemainderOfFiscalYear74.674.9

fsly:SaaSAgreementsPurchaseCommitments


Purchase
Period End2021-06-302021-03-31
Value8.6147.281
Percentage of PurchaseObligationFutureMinimumPaymentsRemainderOfFiscalYear25.425.1

us-gaap:RestrictedCash

us-gaap:RestrictedCash


Restricted
Period End2020-12-312019-12-31
Value1.070
Percentage of RestrictedCash100.0100.0

us-gaap:RestrictedCashAndCashEquivalents

us-gaap:RestrictedCashAndCashEquivalents


Restricted
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value0.980.980.98707070700.0870.0870.00.00.00.00.087
Percentage of RestrictedCashAndCashEquivalents100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.0100.0

us-gaap:RestrictedCashAndCashEquivalents us-gaap:CashAndCashEquivalents

us-gaap:MoneyMarketFunds


Restricted
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value0.980.980.9870707070
Percentage of RestrictedCashAndCashEquivalents100.0100.0100.0100.0100.0100.0100.0

us-gaap:RestrictedCashAndCashEquivalents us-gaap:CashAndCashEquivalents, us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:MoneyMarketFunds, us-gaap:FairValueInputsLevel1


Restricted
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value0.980.980.9870707070
Percentage of RestrictedCashAndCashEquivalents100.0100.0100.0100.0100.0100.0100.0

us-gaap:RestrictedCashAndCashEquivalents us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:FairValueInputsLevel1


Restricted
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value0.980.980.9870707070
Percentage of RestrictedCashAndCashEquivalents100.0100.0100.0100.0100.0100.0100.0

us-gaap:RestrictedCashAndCashEquivalentsAtCarryingValue

us-gaap:RestrictedCashAndCashEquivalentsAtCarryingValue


Restricted
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312018-12-31
Value0.0870.0870.087707070700.0
Percentage of RestrictedCashAndCashEquivalentsAtCarryingValue100.0100.0100.0100.0100.0100.0100.00.0

us-gaap:RestrictedCashCurrent

us-gaap:RestrictedCashCurrent


Restricted
Period End2020-12-312019-12-31
Value0.08770
Percentage of RestrictedCashCurrent100.0100.0

us-gaap:RestrictedCashEquivalents

us-gaap:RestrictedCashEquivalents


Restricted
Period End2020-12-31
Value893000.0
Percentage of RestrictedCashEquivalents100.0

us-gaap:RestrictedCashNoncurrent

us-gaap:RestrictedCashNoncurrent


Restricted
Period End2021-06-302021-03-312020-12-31
Value893000.0893000.0900000.0
Percentage of RestrictedCashNoncurrent100.0100.0100.0

us-gaap:RevenueRemainingPerformanceObligation

us-gaap:RevenueRemainingPerformanceObligation


Revenue
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value1341401551007670
Percentage of RevenueRemainingPerformanceObligation100.0100.0100.0100.0100.0100.0

us-gaap:RevenueRemainingPerformanceObligationPercentage

us-gaap:RevenueRemainingPerformanceObligationPercentage


Revenue
Period End2021-06-302021-03-312020-12-312020-09-30
Value84.081.071.080.0
Percentage of RevenueRemainingPerformanceObligationPercentage100.0100.0100.0100.0

us-gaap:SalesAndExciseTaxPayableCurrent

us-gaap:SalesAndExciseTaxPayableCurrent


Sales
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-31
Value6885000.06378000.06274000.05324000.04792000.04500000.03938000.03327000.03273000.03077000.0
Percentage of SalesAndExciseTaxPayableCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:SalesAndExciseTaxPayableCurrentAndNoncurrent

us-gaap:SalesAndExciseTaxPayableCurrentAndNoncurrent


Sales
Period End2021-06-302021-03-312020-12-312019-12-31
Value6900000.06400000.06300000.03900000.0
Percentage of SalesAndExciseTaxPayableCurrentAndNoncurrent100.0100.0100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber

us-gaap:PerformanceShares


Share
Period End2021-06-302021-03-312020-12-31
Value109000.0128000.088000.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber100.0100.0100.0

us-gaap:RestrictedStock


Share
Period End2021-06-302021-03-312020-12-31
Value560000.0672000.0784000.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber513.8525.0890.9

us-gaap:RestrictedStockUnitsRSU


Share
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value4737000.04381000.04520000.04354000.05166000.02702000.01641000.0864000.00
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber4345.93422.75136.40.00.00.00.00.00.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue

us-gaap:PerformanceShares


Share
Period End2021-06-302021-03-312020-12-31
Value89.1685.5865.11
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue100.0100.0100.0

us-gaap:RestrictedStockUnitsRSU


Share
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value41.5436.0630.0123.6722.8120.0420.0720.00
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue46.642.146.10.00.00.00.00.00.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardMaximumEmployeeSubscriptionRate us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardMaximumEmployeeSubscriptionRate

us-gaap:EmployeeStock


Share
Period End2020-12-312019-12-312019-05-31
Value15.00.150.15
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardMaximumEmployeeSubscriptionRate100.0100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant us-gaap:AwardType, us-gaap:StatementClassOfStock

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant

us-gaap:EmployeeStock, us-gaap:CommonClassA


Share
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302019-12-31
Value3.84.02.82.93.12.2
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant100.0100.0100.0100.0100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant us-gaap:PlanName, us-gaap:StatementClassOfStock

fsly:A2019EquityIncentivePlan, us-gaap:CommonClassA


Share
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-31
Value17181213131612
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant457.9455.0457.1462.1435.50.0563.6

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue


Share
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302019-06-302018-12-312017-12-312016-12-31
Value31038656964466514217324320064167.48
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableAggregateIntrinsicValue

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableAggregateIntrinsicValue


Share
Period End2021-06-302021-03-312020-12-312020-09-30
Value225256352387
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableAggregateIntrinsicValue100.0100.0100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableNumber

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableNumber


Share
Period End2021-06-302021-03-312020-12-312020-09-30
Value4054000.04055000.04214000.04296000.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableNumber100.0100.0100.0100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableWeightedAverageExercisePrice

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableWeightedAverageExercisePrice


Share
Period End2021-06-302021-03-312020-12-312020-09-30
Value4.033.973.713.41
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableWeightedAverageExercisePrice100.0100.0100.0100.0

us-gaap:SharePrice us-gaap:AwardType

us-gaap:SharePrice

us-gaap:EmployeeStock


Share
Period End2021-03-312020-09-302020-06-302020-03-312019-09-302019-06-30
Value24.0714.0914.096.026.926.92
Percentage of SharePrice100.0100.0100.0100.0100.0100.0

us-gaap:SharePrice us-gaap:Range, us-gaap:AwardType

srt:Maximum, us-gaap:EmployeeStock


Share
Period End2021-06-302020-12-312019-12-31
Value24.0724.076.92
Percentage of SharePrice0.00.00.0

srt:Maximum, us-gaap:EmployeeStockOption


Share
Period End2020-12-312019-12-312018-12-312017-12-31
Value96.4322.74.083.58
Percentage of SharePrice0.00.00.00.0

srt:Minimum, us-gaap:EmployeeStock


Share
Period End2021-06-302020-12-312019-12-31
Value12.6614.096.02
Percentage of SharePrice0.00.00.0

srt:Minimum, us-gaap:EmployeeStockOption


Share
Period End2020-12-312019-12-312018-12-312017-12-31
Value85.268.241.932.98
Percentage of SharePrice0.00.00.00.0

us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedNumberOfShares

us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedNumberOfShares


Sharebased
Period End2020-12-312020-06-302020-03-312019-12-312019-09-302019-06-302018-12-312018-06-302017-12-312016-12-31
Value91000.0134580.0163300.0199900.0240420.0280940.0244660.079000.0138000.0597000.0
Percentage of SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedNumberOfShares100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedNumberOfShares us-gaap:AwardType

us-gaap:EmployeeStockOption


Sharebased
Period End2021-06-302021-03-312020-12-312020-09-302020-06-302020-03-312019-12-312019-09-302018-12-31
Value62000.077000.091000.0106000.0135000.0163000.0200000.0240000.0245000.0
Percentage of SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedNumberOfShares0.00.0100.00.0100.399.8100.199.8100.1

us-gaap:TaxCreditCarryforwardAmount us-gaap:IncomeTaxAuthority

us-gaap:TaxCreditCarryforwardAmount

us-gaap:DomesticCountry


Tax
Period End2020-12-31
Value3000000.0
Percentage of TaxCreditCarryforwardAmount100.0

us-gaap:StateAndLocalJurisdiction


Tax
Period End2020-12-31
Value1000000.0
Percentage of TaxCreditCarryforwardAmount33.3

us-gaap:UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate

us-gaap:UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate


Unrecognized
Period End2020-12-31
Value3000000.0
Percentage of UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate100.0

Line plots across dimensions of each concept


us-gaap:CommonStockSharesIssued
us-gaap:StatementClassOfStock
(None,)
Common Stock Shares Issuedus-gaap: Statement Class Of Stock
us-gaap:CommonStockSharesOutstanding
us-gaap:StatementClassOfStock
(None,)
Common Stock Shares Outstandingus-gaap: Statement Class Of Stock
us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding
us-gaap:StatementClassOfStock
(None,)
Weighted Average Number Of Diluted Shares Outstandingus-gaap: Statement Class Of Stock
us-gaap:WeightedAverageNumberOfSharesOutstandingBasic
us-gaap:StatementClassOfStock
(None,)
Weighted Average Number Of Shares Outstanding Basicus-gaap: Statement Class Of Stock
us-gaap:WeightedAverageNumberOfShareOutstandingBasicAndDiluted
us-gaap:StatementClassOfStock
(None,)
Weighted Average Number Of Share Outstanding Basic And Dilutedus-gaap: Statement Class Of Stock
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
us-gaap:EarningsPerShareBasic
us-gaap:StatementClassOfStock
(None,)
Earnings Per Share Basicus-gaap: Statement Class Of Stock
us-gaap:EarningsPerShareDiluted
us-gaap:StatementClassOfStock
(None,)
Earnings Per Share Dilutedus-gaap: Statement Class Of Stock
us-gaap:EarningsPerShareBasicAndDiluted
us-gaap:StatementClassOfStock
(None,)
Earnings Per Share Basic And Dilutedus-gaap: Statement Class Of Stock
TTM Greenblatt ROC
_
(None,)
T T M  Greenblatt  R O C_
us-gaap:AllocatedShareBasedCompensationExpense
us-gaap:AwardType
(None,)
Allocated Share Based Compensation Expenseus-gaap: Award Type
us-gaap:AllocatedShareBasedCompensationExpense
us-gaap:IncomeStatementLocation
(None,)
Allocated Share Based Compensation Expenseus-gaap: Income Statement Location
us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic
us-gaap:StatementClassOfStock
(None,)
Net Income Loss Available To Common Stockholders Basicus-gaap: Statement Class Of Stock
us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax
us-gaap:StatementGeographical
(None,)
Revenue From Contract With Customer Including Assessed Taxus-gaap: Statement Geographical
us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax
us-gaap:MajorCustomers
(None,)
Revenue From Contract With Customer Including Assessed Taxus-gaap: Major Customers
us-gaap:StockholdersEquity
us-gaap:StatementClassOfStock, us-gaap:StatementEquityComponents
(None, 'us-gaap:CommonStock')
Stockholders Equityus-gaap: Statement Class Of Stock, us-gaap: Statement Equity Components
us-gaap:StockholdersEquity
us-gaap:StatementEquityComponents
(None,)
Stockholders Equityus-gaap: Statement Equity Components
us-gaap:CashAndCashEquivalentsAtCarryingValue
us-gaap:CashAndCashEquivalents
(None,)
Cash And Cash Equivalents At Carrying Valueus-gaap: Cash And Cash Equivalents
us-gaap:ShortTermInvestments
us-gaap:FinancialInstrument
(None,)
Short Term Investmentsus-gaap: Financial Instrument
us-gaap:PropertyPlantAndEquipmentGross
us-gaap:PropertyPlantAndEquipmentByType
(None,)
Property Plant And Equipment Grossus-gaap: Property Plant And Equipment By Type
us-gaap:PropertyPlantAndEquipmentNet
us-gaap:StatementGeographical
(None,)
Property Plant And Equipment Netus-gaap: Statement Geographical
us-gaap:FiniteLivedIntangibleAssetsNet
us-gaap:FiniteLivedIntangibleAssetsByMajorClass
(None,)
Finite Lived Intangible Assets Netus-gaap: Finite Lived Intangible Assets By Major Class
us-gaap:StockholdersEquity
us-gaap:StatementClassOfStock, us-gaap:StatementEquityComponents
(None, 'us-gaap:CommonStock')
Stockholders Equityus-gaap: Statement Class Of Stock, us-gaap: Statement Equity Components
us-gaap:StockholdersEquity
us-gaap:StatementEquityComponents
(None,)
Stockholders Equityus-gaap: Statement Equity Components