0001288847-21-000110 | 10-Q | XBRL Viewer

Cover Page - shares	6 Months Ended
Cover Page - shares	Jun. 30, 2021	Jul. 23, 2021
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Jun. 30, 2021
Document Transition Report	false
Entity File Number	001-36383
Entity Registrant Name	Five9, Inc.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	94-3394123
Entity Address, Address Line One	3001 Bishop Drive
Entity Address, Address Line Two	Suite 350
Entity Address, City or Town	San Ramon
Entity Address, State or Province	CA
Entity Address, Postal Zip Code	94583
City Area Code	925
Local Phone Number	201-2000
Title of 12(b) Security	Common stock, par value $0.001 per share
Trading Symbol	FIVN
Security Exchange Name	NASDAQ
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		67,699,681
Entity Central Index Key	0001288847
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	Q2
Amendment Flag	false

Label	Element	Value
Finance Lease, Cost	fivn_FinanceLeaseCost	$ 549,000
Finance Lease, Cost	fivn_FinanceLeaseCost	1,045,000
Finance Lease, Cost	fivn_FinanceLeaseCost	1,279,000
Finance Lease, Cost	fivn_FinanceLeaseCost	2,265,000
Adjustments To Additional Paid In Capital, Carrying Amount of Equity Equity Component Of Convertible Debt	fivn_AdjustmentsToAdditionalPaidInCapitalCarryingAmountOfEquityEquityComponentOfConvertibleDebt	(293,809,000)
Adjustments To Additional Paid In Capital, Carrying Amount of Equity Equity Component Of Convertible Debt	fivn_AdjustmentsToAdditionalPaidInCapitalCarryingAmountOfEquityEquityComponentOfConvertibleDebt	(293,809,000)
Adjustments To Additional Paid In Capital, Carrying Amount of Equity Equity Component Of Convertible Debt	fivn_AdjustmentsToAdditionalPaidInCapitalCarryingAmountOfEquityEquityComponentOfConvertibleDebt	(293,809,000)
Adjustments To Additional Paid In Capital, Carrying Amount of Equity Equity Component Of Convertible Debt	fivn_AdjustmentsToAdditionalPaidInCapitalCarryingAmountOfEquityEquityComponentOfConvertibleDebt	(293,809,000)
Commercial Commitment, to be Paid, Remainder of the Year	fivn_CommercialCommitmentToBePaidRemainderOfTheYear	5,000,000.0
Commercial Commitment, to be Paid, Remainder of the Year	fivn_CommercialCommitmentToBePaidRemainderOfTheYear	1,100,000
Commercial Commitment, to be Paid, Year One	fivn_CommercialCommitmentToBePaidYearOne	2,500,000
Commercial Commitment, to be Paid, Year One	fivn_CommercialCommitmentToBePaidYearOne	1,700,000
Payment of Holdback Related to Acquisitions	fivn_PaymentOfHoldbackRelatedToAcquisitions	3,200,000
Payment of Holdback Related to Acquisitions	fivn_PaymentOfHoldbackRelatedToAcquisitions	0
Debt Instrument, Convertible, Carrying Amount of Debt Component	fivn_DebtInstrumentConvertibleCarryingAmountOfDebtComponent	155,800,000
Adjustments to Additional Paid in Capital, Equity Component of Capped Call Transaction	fivn_AdjustmentsToAdditionalPaidInCapitalEquityComponentOfCappedCallTransaction	90,448,000
Adjustments to Additional Paid in Capital, Equity Component of Capped Call Transaction	fivn_AdjustmentsToAdditionalPaidInCapitalEquityComponentOfCappedCallTransaction	90,448,000
Adjustments to Additional Paid in Capital, Equity Component of Capped Call Transaction	fivn_AdjustmentsToAdditionalPaidInCapitalEquityComponentOfCappedCallTransaction	90,448,000
Adjustments to Additional Paid in Capital, Equity Component of Capped Call Transaction	fivn_AdjustmentsToAdditionalPaidInCapitalEquityComponentOfCappedCallTransaction	90,448,000
Adjustments to Additional Paid in Capital, Equity Component of Capped Call Transaction	fivn_AdjustmentsToAdditionalPaidInCapitalEquityComponentOfCappedCallTransaction	$ 90,500,000
Commercial Commitment, Term of Commitment	fivn_CommercialCommitmentTermOfCommitment	3 years
Commercial Commitment, Term of Commitment	fivn_CommercialCommitmentTermOfCommitment	3 years
Debt Instrument, Issuance Costs, Equity Component	fivn_DebtInstrumentIssuanceCostsEquityComponent	$ 3,958,000
Debt Instrument, Issuance Costs, Equity Component	fivn_DebtInstrumentIssuanceCostsEquityComponent	455,000
Commercial Commitments, Expiring	fivn_CommercialCommitmentsExpiring	12,500,000
Commercial Commitments, Expiring	fivn_CommercialCommitmentsExpiring	7,500,000
Commercial Commitments, Expiring	fivn_CommercialCommitmentsExpiring	5,000,000.0
Carrying Value of Debt Subject to Repurchase, Net	fivn_CarryingValueOfDebtSubjectToRepurchaseNet	150,400,000
Debt Instrument, Redemption Multiple of Principle	fivn_DebtInstrumentRedemptionMultipleofPrinciple	1,000
Debt Instrument, Redemption Multiple of Principle	fivn_DebtInstrumentRedemptionMultipleofPrinciple	1,000
Debt Instrument, Redemption Multiple of Principle	fivn_DebtInstrumentRedemptionMultipleofPrinciple	$ 1,000
Amortization of Debt Issuance Costs, Effective Interest Rate	fivn_AmortizationOfDebtIssuanceCostsEffectiveInterestRate	1.00%
Amortization of Debt Issuance Costs, Effective Interest Rate	fivn_AmortizationOfDebtIssuanceCostsEffectiveInterestRate	0.76%
Debt Instrument, Conversion Option, Equity Component	fivn_DebtInstrumentConversionOptionEquityComponent	$ 158,321,000
Debt Instrument, Conversion Option, Equity Component	fivn_DebtInstrumentConversionOptionEquityComponent	14,505,000
Debt Instrument, Conversion Multiple of Aggregate Principal Amount	fivn_DebtInstrumentConversionMultipleOfAggregatePrincipalAmount	17,600,000
Tax Asset (Liability) of Valuation Allowance Associated with Acquisition	fivn_TaxAssetLiabilityOfValuationAllowanceAssociatedWithAcquisition	0
Tax Asset (Liability) of Valuation Allowance Associated with Acquisition	fivn_TaxAssetLiabilityOfValuationAllowanceAssociatedWithAcquisition	$ 2,910,000
Debt Instrument, Conversion Multiple of Aggregate Principal Amount, Shares	fivn_DebtInstrumentConversionMultipleOfAggregatePrincipalAmountShares	324,575
Commercial Commitment, to be Paid, Year Two	fivn_CommercialCommitmentToBePaidYearTwo	$ 2,200,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets Acquired Including Goodwill	fivn_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssetsAcquiredIncludingGoodwill	164,832,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets Acquired Including Goodwill	fivn_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssetsAcquiredIncludingGoodwill	35,814,000
Debt Issuance Costs, Gross, within Extinguishment of Debt	fivn_DebtIssuanceCostsGrossWithinExtinguishmentOfDebt	$ 2,700,000
Additional Paid in Capital, Unwinding of Capped Calls from Conversion of Convertible Securities, Shares	fivn_AdditionalPaidInCapitalUnwindingOfCappedCallsFromConversionOfConvertibleSecuritiesShares	15,714
Additional Paid in Capital, Unwinding of Capped Calls from Conversion of Convertible Securities, Shares	fivn_AdditionalPaidInCapitalUnwindingOfCappedCallsFromConversionOfConvertibleSecuritiesShares	46,724
Additional Paid in Capital, Unwinding of Capped Calls from Conversion of Convertible Securities, Shares	fivn_AdditionalPaidInCapitalUnwindingOfCappedCallsFromConversionOfConvertibleSecuritiesShares	27,938
Additional Paid in Capital, Unwinding of Capped Calls from Conversion of Convertible Securities, Shares	fivn_AdditionalPaidInCapitalUnwindingOfCappedCallsFromConversionOfConvertibleSecuritiesShares	46,724
Debt Instrument, Option to Purchase Additional Debt through Private Offering	fivn_DebtInstrumentOptionToPurchaseAdditionalDebtThroughPrivateOffering	$ 97,500,000
Debt Instrument, Capped Call Transactions, Shares Coverage	fivn_DebtInstrumentCappedCallTransactionsSharesCoverage	5,600,000
Debt Instrument, Capped Call Transactions, Shares Coverage	fivn_DebtInstrumentCappedCallTransactionsSharesCoverage	6,300,000
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Excluding Cash and Cash Equivalents Acquired, Net	fivn_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedExcludingCashAndCashEquivalentsAcquiredNet	$ 155,297,000
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after One Year, Amortized Cost	fivn_DebtSecuritiesAvailableForSaleMaturityAllocatedAndSingleMaturityDateAfterOneYearAmortizedCost	72,787,000
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after One Year, Amortized Cost	fivn_DebtSecuritiesAvailableForSaleMaturityAllocatedAndSingleMaturityDateAfterOneYearAmortizedCost	42,119,000
Debt Instrument, Conversion of Aggregate Principal Amount, Term 1	fivn_DebtInstrumentConversionOfAggregatePrincipalAmountTerm1	1,200,000
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after One Year, Fair Value	fivn_DebtSecuritiesAvailableForSaleMaturityAllocatedAndSingleMaturityDateAfterOneYearFairValue	72,758,000
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after One Year, Fair Value	fivn_DebtSecuritiesAvailableForSaleMaturityAllocatedAndSingleMaturityDateAfterOneYearFairValue	42,127,000
Increase (Decrease) in Capitalized Contract Cost	fivn_IncreaseDecreaseinCapitalizedContractCost	35,319,000
Increase (Decrease) in Capitalized Contract Cost	fivn_IncreaseDecreaseinCapitalizedContractCost	19,153,000
Finite-Lived Intangible Asset, Expected Amortization, after Year Four	fivn_FiniteLivedIntangibleAssetExpectedAmortizationAfterYearFour	4,200,000
Cash Consideration to Repurchase Note	fivn_CashConsiderationToRepurchaseNote	17,622,000
Cash Consideration to Repurchase Note	fivn_CashConsiderationToRepurchaseNote	181,462,000
Cash Consideration to Repurchase Note	fivn_CashConsiderationToRepurchaseNote	$ 181,000,000.0
Debt Instrument, Convertible, Trading Days Preceding Redemption Notice	fivn_DebtInstrumentConvertibleTradingDaysPrecedingRedemptionNotice	2
Debt Instrument, Convertible, Trading Days Preceding Redemption Notice	fivn_DebtInstrumentConvertibleTradingDaysPrecedingRedemptionNotice	2
Aggregate Consideration to Repurchase Note	fivn_AggregateConsiderationToRepurchaseNote	$ 449,600,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Tangible Assets	fivn_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedTangibleAssets	$ 200,000
Other Commitment, Future Minimum Payments Due, Period	fivn_OtherCommitmentFutureMinimumPaymentsDuePeriod	60 months
Payments For Capped Call Transactions, Financing Activities	fivn_PaymentsForCappedCallTransactionsFinancingActivities	$ 0
Payments For Capped Call Transactions, Financing Activities	fivn_PaymentsForCappedCallTransactionsFinancingActivities	$ 90,448,000
Debt Instrument, Convertible, Number of Conversion Features Triggered	fivn_DebtInstrumentConvertibleNumberOfConversionFeaturesTriggered	1
Stock Issued During Period, Value, Stock Options and Warrants Exercised	fivn_StockIssuedDuringPeriodValueStockOptionsandWarrantsExercised	$ 3,484,000
Stock Issued During Period, Value, Stock Options and Warrants Exercised	fivn_StockIssuedDuringPeriodValueStockOptionsandWarrantsExercised	3,484,000
Stock Issued During Period, Value, Stock Options and Warrants Exercised	fivn_StockIssuedDuringPeriodValueStockOptionsandWarrantsExercised	2,224,000
Stock Issued During Period, Value, Stock Options and Warrants Exercised	fivn_StockIssuedDuringPeriodValueStockOptionsandWarrantsExercised	2,224,000
Stock Issued During Period, Value, Stock Options and Warrants Exercised	fivn_StockIssuedDuringPeriodValueStockOptionsandWarrantsExercised	6,080,000
Stock Issued During Period, Value, Stock Options and Warrants Exercised	fivn_StockIssuedDuringPeriodValueStockOptionsandWarrantsExercised	6,080,000
Stock Issued During Period, Value, Stock Options and Warrants Exercised	fivn_StockIssuedDuringPeriodValueStockOptionsandWarrantsExercised	4,439,000
Stock Issued During Period, Value, Stock Options and Warrants Exercised	fivn_StockIssuedDuringPeriodValueStockOptionsandWarrantsExercised	$ 4,439,000
Debt Instrument, Interest Rate, Stated Percentage, Additional Interest	fivn_DebtInstrumentInterestRateStatedPercentageAdditionalInterest	0.00500
Stock Issued During Period, Shares, Stock Options and Warrants Exercised	fivn_StockIssuedDuringPeriodSharesStockOptionsandWarrantsExercised	161,000
Stock Issued During Period, Shares, Stock Options and Warrants Exercised	fivn_StockIssuedDuringPeriodSharesStockOptionsandWarrantsExercised	123,000
Stock Issued During Period, Shares, Stock Options and Warrants Exercised	fivn_StockIssuedDuringPeriodSharesStockOptionsandWarrantsExercised	321,000
Stock Issued During Period, Shares, Stock Options and Warrants Exercised	fivn_StockIssuedDuringPeriodSharesStockOptionsandWarrantsExercised	246,000
Lessee, Operating Lease, Liability, to be Paid, after Year Four	fivn_LesseeOperatingLeaseLiabilityToBePaidAfterYearFour	$ 27,360,000
Finance Lease, Liability, to be Paid, after Year Four	fivn_FinanceLeaseLiabilityToBePaidAfterYearFour
Accrued Federal Fees	fivn_AccruedFederalFees	5,138,000
Accrued Federal Fees	fivn_AccruedFederalFees	3,745,000
Contract with Customer, Asset (Liability), Net	fivn_ContractwithCustomerAssetLiabilityNet	(34,175,000)
Contract with Customer, Asset (Liability), Net	fivn_ContractwithCustomerAssetLiabilityNet	$ (34,059,000)
Lessee, Operating Lease, Option to Terminate, Notice	fivn_LesseeOperatingLeaseOptionToTerminateNotice	30 days
Additional Paid in Capital, Shares, Unwinding of Capped Calls from Conversion of Convertible Securities	fivn_AdditionalPaidInCapitalSharesUnwindingOfCappedCallsFromConversionOfConvertibleSecurities	28,000
Additional Paid in Capital, Shares, Unwinding of Capped Calls from Conversion of Convertible Securities	fivn_AdditionalPaidInCapitalSharesUnwindingOfCappedCallsFromConversionOfConvertibleSecurities	47,000
Additional Paid in Capital, Value, Unwinding of Capped Calls from Conversion of Convertible Securities	fivn_AdditionalPaidInCapitalValueUnwindingOfCappedCallsFromConversionOfConvertibleSecurities	$ (5,000)
Additional Paid in Capital, Value, Unwinding of Capped Calls from Conversion of Convertible Securities	fivn_AdditionalPaidInCapitalValueUnwindingOfCappedCallsFromConversionOfConvertibleSecurities	(5,000)
Additional Paid in Capital, Value, Unwinding of Capped Calls from Conversion of Convertible Securities	fivn_AdditionalPaidInCapitalValueUnwindingOfCappedCallsFromConversionOfConvertibleSecurities	(7,000)
Additional Paid in Capital, Value, Unwinding of Capped Calls from Conversion of Convertible Securities	fivn_AdditionalPaidInCapitalValueUnwindingOfCappedCallsFromConversionOfConvertibleSecurities	(7,000)
Debt Instrument, Convertible, Associated Capped Call Transactions, Amount	fivn_DebtInstrumentConvertibleAssociatedCappedCallTransactionsAmount	31,400,000
Other Long-term Liabilities	fivn_OtherLongTermLiabilities	7,010,000
Other Long-term Liabilities	fivn_OtherLongTermLiabilities	5,554,000
Lessee, Operating Lease, Lease Not Yet Commenced, Amount	fivn_LesseeOperatingLeaseLeaseNotYetCommencedAmount	1,800,000
Noncash Or Part Noncash Acquisition Transaction Costs Accrued	fivn_NoncashOrPartNoncashAcquisitionTransactionCostsAccrued	0
Noncash Or Part Noncash Acquisition Transaction Costs Accrued	fivn_NoncashOrPartNoncashAcquisitionTransactionCostsAccrued	$ 3,700,000
Business Combination, Number of Extensions to Receive Approval	fivn_BusinessCombinationNumberOfExtensionsToReceiveApproval	2
Amortization of Deferred Contract Acquisition Costs	fivn_AmortizationOfDeferredContractAcquisitionCosts	$ 11,468,000
Amortization of Deferred Contract Acquisition Costs	fivn_AmortizationOfDeferredContractAcquisitionCosts	7,305,000
Payments to Acquire Assets As Part Of An Asset Acquisition	fivn_PaymentsToAcquireAssetsAsPartOfAnAssetAcquisition	0
Payments to Acquire Assets As Part Of An Asset Acquisition	fivn_PaymentsToAcquireAssetsAsPartOfAnAssetAcquisition	$ 100,000
Business Combination, Extension Period	fivn_BusinessCombinationExtensionPeriod	3 months
Capitalization of Leasehold Improvement Through Non-Cash Lease Incentive	fivn_CapitalizationofLeaseholdImprovementThroughNonCashLeaseIncentive	$ 4,815,000
Capitalization of Leasehold Improvement Through Non-Cash Lease Incentive	fivn_CapitalizationofLeaseholdImprovementThroughNonCashLeaseIncentive	$ 0
Business Combination, Number of Additional Extensions to Receive Approval	fivn_BusinessCombinationNumberOfAdditionalExtensionsToReceiveApproval	1
Business Combination, Termination Fee Potentially Required to be Paid to Acquiring Company	fivn_BusinessCombinationTerminationFeePotentiallyRequiredToBePaidToAcquiringCompany	$ 450,000,000
Sales and Excise Taxes Payable, Noncurrent	fivn_SalesandExciseTaxesPayableNoncurrent	867,000
Sales and Excise Taxes Payable, Noncurrent	fivn_SalesandExciseTaxesPayableNoncurrent	$ 857,000

Financial Statement Components - Schedule of Accrued and Other Current Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Financial Statement Components [Abstract]
Accrued and other current liabilities	$ 74,024	$ 44,450

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