2.4.1.9 Html 70 134 1 true 23 0 false 5 false false R1.htm 0002000 - Document - Document and Entity Information Sheet http://www.Lifelock.com/role/DocumentAndEntityInformation Document and Entity Information true false R2.htm 1001000 - Statement - Condensed Consolidated Balance Sheets Sheet http://www.Lifelock.com/role/CondensedConsolidatedBalanceSheets Condensed Consolidated Balance Sheets false false R3.htm 1001501 - Statement - Condensed Consolidated Balance Sheets (Parenthetical) Sheet http://www.Lifelock.com/role/CondensedConsolidatedBalanceSheetsParenthetical Condensed Consolidated Balance Sheets (Parenthetical) false false R4.htm 1002000 - Statement - Condensed Consolidated Statements of Operations Sheet http://www.Lifelock.com/role/CondensedConsolidatedStatementsOfOperations Condensed Consolidated Statements of Operations false false R5.htm 1003000 - Statement - Condensed Consolidated Statements of Comprehensive Income (Loss) Sheet http://www.Lifelock.com/role/CondensedConsolidatedStatementsOfComprehensiveIncomeLoss Condensed Consolidated Statements of Comprehensive Income (Loss) false false R6.htm 1005000 - Statement - Condensed Consolidated Statements of Cash Flows Sheet http://www.Lifelock.com/role/CondensedConsolidatedStatementsOfCashFlows Condensed Consolidated Statements of Cash Flows false false R7.htm 2101100 - Disclosure - Corporation Information Sheet http://www.Lifelock.com/role/CorporationInformation Corporation Information false false R8.htm 2101100 - Disclosure - Summary of Significant Accounting Policies Sheet http://www.Lifelock.com/role/SummaryOfSignificantAccountingPolicies Summary of Significant Accounting Policies false false R9.htm 2106100 - Disclosure - Marketable Securities Sheet http://www.Lifelock.com/role/MarketableSecurities Marketable Securities false false R10.htm 2123100 - Disclosure - Stockholders' Equity Sheet http://www.Lifelock.com/role/StockholdersEquity Stockholders' Equity false false R11.htm 2132100 - Disclosure - Fair Value Measurements Sheet http://www.Lifelock.com/role/FairValueMeasurements Fair Value Measurements false false R12.htm 2133100 - Disclosure - Net Loss Per Share Sheet http://www.Lifelock.com/role/NetLossPerShare Net Loss Per Share false false R13.htm 2137100 - Disclosure - Income Taxes Sheet http://www.Lifelock.com/role/IncomeTaxes Income Taxes false false R14.htm 2141100 - Disclosure - Segment Reporting Sheet http://www.Lifelock.com/role/SegmentReporting Segment Reporting false false R15.htm 2143100 - Disclosure - Contingencies Sheet http://www.Lifelock.com/role/Contingencies Contingencies false false R16.htm 2201201 - Disclosure - Summary of Significant Accounting Policies (Policies) Sheet http://www.Lifelock.com/role/SummaryOfSignificantAccountingPoliciesPolicies Summary of Significant Accounting Policies (Policies) false false R17.htm 2306301 - Disclosure - Marketable Securities (Tables) Sheet http://www.Lifelock.com/role/MarketableSecuritiesTables Marketable Securities (Tables) false false R18.htm 2323301 - Disclosure - Stockholders' Equity (Tables) Sheet http://www.Lifelock.com/role/StockholdersEquityTables Stockholders' Equity (Tables) false false R19.htm 2332301 - Disclosure - Fair Value Measurements (Tables) Sheet http://www.Lifelock.com/role/FairValueMeasurementsTables Fair Value Measurements (Tables) false false R20.htm 2333301 - Disclosure - Net Loss Per Share (Tables) Sheet http://www.Lifelock.com/role/NetLossPerShareTables Net Loss Per Share (Tables) false false R21.htm 2341301 - Disclosure - Segment Reporting (Tables) Sheet http://www.Lifelock.com/role/SegmentReportingTables Segment Reporting (Tables) false false R22.htm 2401401 - Disclosure - Corporation Information - Additional Information (Detail) Sheet http://www.Lifelock.com/role/CorporationInformationAdditionalInformationDetail Corporation Information - Additional Information (Detail) false false R23.htm 2406402 - Disclosure - Marketable Securities - Summary of Marketable Securities Designated as Available-for-Sale (Detail) Sheet http://www.Lifelock.com/role/MarketableSecuritiesSummaryOfMarketableSecuritiesDesignatedAsAvailableForSaleDetail Marketable Securities - Summary of Marketable Securities Designated as Available-for-Sale (Detail) false false R24.htm 2406403 - Disclosure - Marketable Securities - Summary of Amortized Cost and Estimated Fair Value of Marketable Securities by Maturity (Detail) Sheet http://www.Lifelock.com/role/MarketableSecuritiesSummaryOfAmortizedCostAndEstimatedFairValueOfMarketableSecuritiesByMaturityDetail Marketable Securities - Summary of Amortized Cost and Estimated Fair Value of Marketable Securities by Maturity (Detail) false false R25.htm 2423402 - Disclosure - Stockholders' Equity - Additional Information (Detail) Sheet http://www.Lifelock.com/role/StockholdersEquityAdditionalInformationDetail Stockholders' Equity - Additional Information (Detail) false false R26.htm 2423403 - Disclosure - Stockholders' Equity - Summary of Components of Share-Based Compensation Expense (Details) Sheet http://www.Lifelock.com/role/StockholdersEquitySummaryOfComponentsOfShareBasedCompensationExpenseDetails Stockholders' Equity - Summary of Components of Share-Based Compensation Expense (Details) false false R27.htm 2423404 - Disclosure - Stockholders' Equity - Summary of Warrants (Details) Sheet http://www.Lifelock.com/role/StockholdersEquitySummaryOfWarrantsDetails Stockholders' Equity - Summary of Warrants (Details) false false R28.htm 2432402 - Disclosure - Fair Value Measurements - Fair Value of Financial Assets and Liabilities (Detail) Sheet http://www.Lifelock.com/role/FairValueMeasurementsFairValueOfFinancialAssetsAndLiabilitiesDetail Fair Value Measurements - Fair Value of Financial Assets and Liabilities (Detail) false false R29.htm 2433402 - Disclosure - Net Loss Per Share - Computation of Basic and Diluted Net Income (Loss) Per Share Attributable to Common Stockholders (Detail) Sheet http://www.Lifelock.com/role/NetLossPerShareComputationOfBasicAndDilutedNetIncomeLossPerShareAttributableToCommonStockholdersDetail Net Loss Per Share - Computation of Basic and Diluted Net Income (Loss) Per Share Attributable to Common Stockholders (Detail) false false R30.htm 2433403 - Disclosure - Net Loss Per Share - Number of Outstanding Stock Options, Warrants to Purchase Common Preferred Stock and Convertible Redeemable Preferred Stock Excluded from Computation of Diluted Net Income (Loss) Per Share (Detail) Sheet http://www.Lifelock.com/role/NetLossPerShareNumberOfOutstandingStockOptionsWarrantsToPurchaseCommonPreferredStockAndConvertibleRedeemablePreferredStockExcludedFromComputationOfDilutedNetIncomeLossPerShareDetail Net Loss Per Share - Number of Outstanding Stock Options, Warrants to Purchase Common Preferred Stock and Convertible Redeemable Preferred Stock Excluded from Computation of Diluted Net Income (Loss) Per Share (Detail) false false R31.htm 2437401 - Disclosure - Income Taxes - Additional Information (Detail) Sheet http://www.Lifelock.com/role/IncomeTaxesAdditionalInformationDetail Income Taxes - Additional Information (Detail) false false R32.htm 2441402 - Disclosure - Segment Reporting - Financial Information of Segments (Detail) Sheet http://www.Lifelock.com/role/SegmentReportingFinancialInformationOfSegmentsDetail Segment Reporting - Financial Information of Segments (Detail) false false R33.htm 2441403 - Disclosure - Segment Reporting - Additional Information (Detail) Sheet http://www.Lifelock.com/role/SegmentReportingAdditionalInformationDetail Segment Reporting - Additional Information (Detail) false false R34.htm 2443401 - Disclosure - Contingencies - Additional Information (Detail) Sheet http://www.Lifelock.com/role/ContingenciesAdditionalInformationDetail Contingencies - Additional Information (Detail) false false All Reports Book All Reports 'Monetary' elements on report '2443401 - Disclosure - Contingencies - Additional Information (Detail)' had a mix of different decimal attribute values. Process Flow-Through: 1001000 - Statement - Condensed Consolidated Balance Sheets Process Flow-Through: Removing column 'Mar. 31, 2014' Process Flow-Through: Removing column 'Dec. 31, 2013' Process Flow-Through: 1001501 - Statement - Condensed Consolidated Balance Sheets (Parenthetical) Process Flow-Through: 1002000 - Statement - Condensed Consolidated Statements of Operations Process Flow-Through: 1003000 - Statement - Condensed Consolidated Statements of Comprehensive Income (Loss) Process Flow-Through: 1005000 - Statement - Condensed Consolidated Statements of Cash Flows lock-20150331.xml lock-20150331.xsd lock-20150331_cal.xml lock-20150331_def.xml lock-20150331_lab.xml lock-20150331_pre.xml true true