3.26.1 html 195 305 1 false 65 0 false 10 false false R1.htm 0000001 - Document - Cover Sheet http://www.qualys.com/role/Cover Cover Cover 1 false false R2.htm 9952151 - Statement - CONDENSED CONSOLIDATED BALANCE SHEETS Sheet http://www.qualys.com/role/CONDENSEDCONSOLIDATEDBALANCESHEETS CONDENSED CONSOLIDATED BALANCE SHEETS Statements 2 false false R3.htm 9952152 - Statement - CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) Sheet http://www.qualys.com/role/CONDENSEDCONSOLIDATEDBALANCESHEETSParenthetical CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) Statements 3 false false R4.htm 9952153 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (unaudited) Sheet http://www.qualys.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFOPERATIONSunaudited CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (unaudited) Statements 4 false false R5.htm 9952154 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (unaudited) Sheet http://www.qualys.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCOMPREHENSIVEINCOMEunaudited CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (unaudited) Statements 5 false false R6.htm 9952155 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (unaudited) Sheet http://www.qualys.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWSunaudited CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (unaudited) Statements 6 false false R7.htm 9952156 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS??? EQUITY Sheet http://www.qualys.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFSTOCKHOLDERSEQUITY CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS??? EQUITY Statements 7 false false R8.htm 9952157 - Disclosure - Description of Business and Summary of Significant Accounting Policies Sheet http://www.qualys.com/role/DescriptionofBusinessandSummaryofSignificantAccountingPolicies Description of Business and Summary of Significant Accounting Policies Notes 8 false false R9.htm 9952158 - Disclosure - Fair Value of Financial Instruments Sheet http://www.qualys.com/role/FairValueofFinancialInstruments Fair Value of Financial Instruments Notes 9 false false R10.htm 9952159 - Disclosure - Accumulated Other Comprehensive Income (Loss) Sheet http://www.qualys.com/role/AccumulatedOtherComprehensiveIncomeLoss Accumulated Other Comprehensive Income (Loss) Notes 10 false false R11.htm 9952160 - Disclosure - Property and Equipment, Net Sheet http://www.qualys.com/role/PropertyandEquipmentNet Property and Equipment, Net Notes 11 false false R12.htm 9952161 - Disclosure - Revenue from Contracts with Customers Sheet http://www.qualys.com/role/RevenuefromContractswithCustomers Revenue from Contracts with Customers Notes 12 false false R13.htm 9952162 - Disclosure - Intangible Assets, Net Sheet http://www.qualys.com/role/IntangibleAssetsNet Intangible Assets, Net Notes 13 false false R14.htm 9952163 - Disclosure - Leases Sheet http://www.qualys.com/role/Leases Leases Notes 14 false false R15.htm 9952164 - Disclosure - Commitments and Contingencies Sheet http://www.qualys.com/role/CommitmentsandContingencies Commitments and Contingencies Notes 15 false false R16.htm 9952165 - Disclosure - Stockholders' Equity and Stock-based Compensation Sheet http://www.qualys.com/role/StockholdersEquityandStockbasedCompensation Stockholders' Equity and Stock-based Compensation Notes 16 false false R17.htm 9952166 - Disclosure - Income Taxes Sheet http://www.qualys.com/role/IncomeTaxes Income Taxes Notes 17 false false R18.htm 9952167 - Disclosure - Segment and Geographic Area Information Sheet http://www.qualys.com/role/SegmentandGeographicAreaInformation Segment and Geographic Area Information Notes 18 false false R19.htm 9952168 - Disclosure - Net Income Per Share Sheet http://www.qualys.com/role/NetIncomePerShare Net Income Per Share Notes 19 false false R20.htm 995445 - Disclosure - Insider Trading Arrangements Sheet http://xbrl.sec.gov/ecd/role/InsiderTradingArrangements Insider Trading Arrangements Notes 20 false false R21.htm 9955511 - Disclosure - Description of Business and Summary of Significant Accounting Policies (Policies) Sheet http://www.qualys.com/role/DescriptionofBusinessandSummaryofSignificantAccountingPoliciesPolicies Description of Business and Summary of Significant Accounting Policies (Policies) Policies http://www.qualys.com/role/DescriptionofBusinessandSummaryofSignificantAccountingPolicies 21 false false R22.htm 9955512 - Disclosure - Fair Value of Financial Instruments (Tables) Sheet http://www.qualys.com/role/FairValueofFinancialInstrumentsTables Fair Value of Financial Instruments (Tables) Tables http://www.qualys.com/role/FairValueofFinancialInstruments 22 false false R23.htm 9955513 - Disclosure - Accumulated Other Comprehensive Income (Loss) (Tables) Sheet http://www.qualys.com/role/AccumulatedOtherComprehensiveIncomeLossTables Accumulated Other Comprehensive Income (Loss) (Tables) Tables http://www.qualys.com/role/AccumulatedOtherComprehensiveIncomeLoss 23 false false R24.htm 9955514 - Disclosure - Property and Equipment, Net (Tables) Sheet http://www.qualys.com/role/PropertyandEquipmentNetTables Property and Equipment, Net (Tables) Tables http://www.qualys.com/role/PropertyandEquipmentNet 24 false false R25.htm 9955515 - Disclosure - Revenue from Contracts with Customers (Tables) Sheet http://www.qualys.com/role/RevenuefromContractswithCustomersTables Revenue from Contracts with Customers (Tables) Tables http://www.qualys.com/role/RevenuefromContractswithCustomers 25 false false R26.htm 9955516 - Disclosure - Intangible Assets, Net (Tables) Sheet http://www.qualys.com/role/IntangibleAssetsNetTables Intangible Assets, Net (Tables) Tables http://www.qualys.com/role/IntangibleAssetsNet 26 false false R27.htm 9955517 - Disclosure - Leases (Tables) Sheet http://www.qualys.com/role/LeasesTables Leases (Tables) Tables http://www.qualys.com/role/Leases 27 false false R28.htm 9955518 - Disclosure - Stockholders' Equity and Stock-based Compensation (Tables) Sheet http://www.qualys.com/role/StockholdersEquityandStockbasedCompensationTables Stockholders' Equity and Stock-based Compensation (Tables) Tables http://www.qualys.com/role/StockholdersEquityandStockbasedCompensation 28 false false R29.htm 9955519 - Disclosure - Segment and Geographic Area Information (Tables) Sheet http://www.qualys.com/role/SegmentandGeographicAreaInformationTables Segment and Geographic Area Information (Tables) Tables http://www.qualys.com/role/SegmentandGeographicAreaInformation 29 false false R30.htm 9955520 - Disclosure - Net Income Per Share (Tables) Sheet http://www.qualys.com/role/NetIncomePerShareTables Net Income Per Share (Tables) Tables http://www.qualys.com/role/NetIncomePerShare 30 false false R31.htm 9955521 - Disclosure - Fair Value of Financial Instruments - Assets and Liabilities (Details) Sheet http://www.qualys.com/role/FairValueofFinancialInstrumentsAssetsandLiabilitiesDetails Fair Value of Financial Instruments - Assets and Liabilities (Details) Details 31 false false R32.htm 9955522 - Disclosure - Fair Value of Financial Instruments - Cash and Cash Equivalents (Details) Sheet http://www.qualys.com/role/FairValueofFinancialInstrumentsCashandCashEquivalentsDetails Fair Value of Financial Instruments - Cash and Cash Equivalents (Details) Details 32 false false R33.htm 9955523 - Disclosure - Fair Value of Financial Instruments - Summary of Securities in Unrealized Loss Positions (Details) Sheet http://www.qualys.com/role/FairValueofFinancialInstrumentsSummaryofSecuritiesinUnrealizedLossPositionsDetails Fair Value of Financial Instruments - Summary of Securities in Unrealized Loss Positions (Details) Details 33 false false R34.htm 9955524 - Disclosure - Fair Value of Financial Instruments - Narrative (Details) Sheet http://www.qualys.com/role/FairValueofFinancialInstrumentsNarrativeDetails Fair Value of Financial Instruments - Narrative (Details) Details 34 false false R35.htm 9955525 - Disclosure - Fair Value of Financial Instruments - Summary of the Fair Value of Marketable Securities (Details) Sheet http://www.qualys.com/role/FairValueofFinancialInstrumentsSummaryoftheFairValueofMarketableSecuritiesDetails Fair Value of Financial Instruments - Summary of the Fair Value of Marketable Securities (Details) Details 35 false false R36.htm 9955526 - Disclosure - Fair Value of Financial Instruments - Summary of Derivative Financial Instruments (Details) Sheet http://www.qualys.com/role/FairValueofFinancialInstrumentsSummaryofDerivativeFinancialInstrumentsDetails Fair Value of Financial Instruments - Summary of Derivative Financial Instruments (Details) Details 36 false false R37.htm 9955527 - Disclosure - Fair Value of Financial Instruments - Amounts Recognized In Statement of Operations (Details) Sheet http://www.qualys.com/role/FairValueofFinancialInstrumentsAmountsRecognizedInStatementofOperationsDetails Fair Value of Financial Instruments - Amounts Recognized In Statement of Operations (Details) Details 37 false false R38.htm 9955528 - Disclosure - Accumulated Other Comprehensive Income (Loss) - Components and Changes (Details) Sheet http://www.qualys.com/role/AccumulatedOtherComprehensiveIncomeLossComponentsandChangesDetails Accumulated Other Comprehensive Income (Loss) - Components and Changes (Details) Details http://www.qualys.com/role/AccumulatedOtherComprehensiveIncomeLossTables 38 false false R39.htm 9955529 - Disclosure - Accumulated Other Comprehensive Income (Loss) - Amounts Reclassified from AOCI (Details) Sheet http://www.qualys.com/role/AccumulatedOtherComprehensiveIncomeLossAmountsReclassifiedfromAOCIDetails Accumulated Other Comprehensive Income (Loss) - Amounts Reclassified from AOCI (Details) Details http://www.qualys.com/role/AccumulatedOtherComprehensiveIncomeLossTables 39 false false R40.htm 9955530 - Disclosure - Accumulated Other Comprehensive Income (Loss) - Narrative (Details) Sheet http://www.qualys.com/role/AccumulatedOtherComprehensiveIncomeLossNarrativeDetails Accumulated Other Comprehensive Income (Loss) - Narrative (Details) Details http://www.qualys.com/role/AccumulatedOtherComprehensiveIncomeLossTables 40 false false R41.htm 9955531 - Disclosure - Property and Equipment, Net - Property and Equipment, Net (Details) Sheet http://www.qualys.com/role/PropertyandEquipmentNetPropertyandEquipmentNetDetails Property and Equipment, Net - Property and Equipment, Net (Details) Details 41 false false R42.htm 9955532 - Disclosure - Property and Equipment, Net - Narrative (Details) Sheet http://www.qualys.com/role/PropertyandEquipmentNetNarrativeDetails Property and Equipment, Net - Narrative (Details) Details 42 false false R43.htm 9955533 - Disclosure - Revenue from Contracts with Customers - Narrative (Details) Sheet http://www.qualys.com/role/RevenuefromContractswithCustomersNarrativeDetails Revenue from Contracts with Customers - Narrative (Details) Details 43 false false R44.htm 9955534 - Disclosure - Revenue from Contracts with Customers - Expected Revenue from All Remaining Performance Obligations (Details) Sheet http://www.qualys.com/role/RevenuefromContractswithCustomersExpectedRevenuefromAllRemainingPerformanceObligationsDetails Revenue from Contracts with Customers - Expected Revenue from All Remaining Performance Obligations (Details) Details 44 false false R45.htm 9955535 - Disclosure - Revenue from Contracts with Customers - Revenue by Sales Channel (Details) Sheet http://www.qualys.com/role/RevenuefromContractswithCustomersRevenuebySalesChannelDetails Revenue from Contracts with Customers - Revenue by Sales Channel (Details) Details 45 false false R46.htm 9955536 - Disclosure - Revenue from Contracts with Customers - Capitalized Cost to Obtain Contracts, Current and Noncurrent (Details) Sheet http://www.qualys.com/role/RevenuefromContractswithCustomersCapitalizedCosttoObtainContractsCurrentandNoncurrentDetails Revenue from Contracts with Customers - Capitalized Cost to Obtain Contracts, Current and Noncurrent (Details) Details 46 false false R47.htm 9955537 - Disclosure - Intangible Assets, Net- Carrying Value of Intangible Assets (Details) Sheet http://www.qualys.com/role/IntangibleAssetsNetCarryingValueofIntangibleAssetsDetails Intangible Assets, Net- Carrying Value of Intangible Assets (Details) Details 47 false false R48.htm 9955538 - Disclosure - Intangible Assets, Net - Narrative (Details) Sheet http://www.qualys.com/role/IntangibleAssetsNetNarrativeDetails Intangible Assets, Net - Narrative (Details) Details 48 false false R49.htm 9955539 - Disclosure - Intangible Assets, Net - Expected Amortization Expense in Future Periods (Details) Sheet http://www.qualys.com/role/IntangibleAssetsNetExpectedAmortizationExpenseinFuturePeriodsDetails Intangible Assets, Net - Expected Amortization Expense in Future Periods (Details) Details 49 false false R50.htm 9955540 - Disclosure - Leases - Narrative (Details) Sheet http://www.qualys.com/role/LeasesNarrativeDetails Leases - Narrative (Details) Details 50 false false R51.htm 9955541 - Disclosure - Leases - Supplemental Cash Flow Information (Details) Sheet http://www.qualys.com/role/LeasesSupplementalCashFlowInformationDetails Leases - Supplemental Cash Flow Information (Details) Details 51 false false R52.htm 9955542 - Disclosure - Leases- Weighted Average Remaining Lease Term and Weighted Average Discount Rate (Details) Sheet http://www.qualys.com/role/LeasesWeightedAverageRemainingLeaseTermandWeightedAverageDiscountRateDetails Leases- Weighted Average Remaining Lease Term and Weighted Average Discount Rate (Details) Details 52 false false R53.htm 9955543 - Disclosure - Leases - Minimum Annual Lease Payments (Details) Sheet http://www.qualys.com/role/LeasesMinimumAnnualLeasePaymentsDetails Leases - Minimum Annual Lease Payments (Details) Details 53 false false R54.htm 9955544 - Disclosure - Stockholders' Equity and Stock-based Compensation - Narrative (Details) Sheet http://www.qualys.com/role/StockholdersEquityandStockbasedCompensationNarrativeDetails Stockholders' Equity and Stock-based Compensation - Narrative (Details) Details http://www.qualys.com/role/StockholdersEquityandStockbasedCompensationTables 54 false false R55.htm 9955545 - Disclosure - Stockholders' Equity and Stock-based Compensation - Share-based Compensation and Stock Options Activity (Details) Sheet http://www.qualys.com/role/StockholdersEquityandStockbasedCompensationSharebasedCompensationandStockOptionsActivityDetails Stockholders' Equity and Stock-based Compensation - Share-based Compensation and Stock Options Activity (Details) Details 55 false false R56.htm 9955546 - Disclosure - Stockholders' Equity and Stock-based Compensation - Summary of Restricted Stock Unit Activity (Details) Sheet http://www.qualys.com/role/StockholdersEquityandStockbasedCompensationSummaryofRestrictedStockUnitActivityDetails Stockholders' Equity and Stock-based Compensation - Summary of Restricted Stock Unit Activity (Details) Details 56 false false R57.htm 9955547 - Disclosure - Stockholders' Equity and Stock-based Compensation - Summary of Stock-based Compensation Expense (Details) Sheet http://www.qualys.com/role/StockholdersEquityandStockbasedCompensationSummaryofStockbasedCompensationExpenseDetails Stockholders' Equity and Stock-based Compensation - Summary of Stock-based Compensation Expense (Details) Details 57 false false R58.htm 9955548 - Disclosure - Stockholders' Equity and Stock-based Compensation - Schedule of Repurchase Agreements (Details) Sheet http://www.qualys.com/role/StockholdersEquityandStockbasedCompensationScheduleofRepurchaseAgreementsDetails Stockholders' Equity and Stock-based Compensation - Schedule of Repurchase Agreements (Details) Details 58 false false R59.htm 9955549 - Disclosure - Income Taxes (Details) Sheet http://www.qualys.com/role/IncomeTaxesDetails Income Taxes (Details) Details http://www.qualys.com/role/IncomeTaxes 59 false false R60.htm 9955550 - Disclosure - Segment and Geographic Area Information - Narrative (Details) Sheet http://www.qualys.com/role/SegmentandGeographicAreaInformationNarrativeDetails Segment and Geographic Area Information - Narrative (Details) Details 60 false false R61.htm 9955551 - Disclosure - Segment and Geographic Area Information - Reported Segment Revenue, Segment Profit Or Loss (Details) Sheet http://www.qualys.com/role/SegmentandGeographicAreaInformationReportedSegmentRevenueSegmentProfitOrLossDetails Segment and Geographic Area Information - Reported Segment Revenue, Segment Profit Or Loss (Details) Details 61 false false R62.htm 9955552 - Disclosure - Segment and Geographic Area Information - Revenue and Property and Equipment, Net by Geographic Area (Details) Sheet http://www.qualys.com/role/SegmentandGeographicAreaInformationRevenueandPropertyandEquipmentNetbyGeographicAreaDetails Segment and Geographic Area Information - Revenue and Property and Equipment, Net by Geographic Area (Details) Details 62 false false R63.htm 9955553 - Disclosure - Net Income Per Share - Basic and Diluted Net Income Per Share (Details) Sheet http://www.qualys.com/role/NetIncomePerShareBasicandDilutedNetIncomePerShareDetails Net Income Per Share - Basic and Diluted Net Income Per Share (Details) Details 63 false false R64.htm 9955554 - Disclosure - Net Income Per Share - Anti-dilutive Net Income Per Share (Details) Sheet http://www.qualys.com/role/NetIncomePerShareAntidilutiveNetIncomePerShareDetails Net Income Per Share - Anti-dilutive Net Income Per Share (Details) Details 64 false false All Reports Book All Reports qlys-20260331.htm qlys-20260331.xsd qlys-20260331_cal.xml qlys-20260331_def.xml qlys-20260331_lab.xml qlys-20260331_pre.xml http://fasb.org/srt/2025 http://fasb.org/us-gaap/2025 http://xbrl.sec.gov/dei/2025 http://xbrl.sec.gov/ecd/2025 true true