3.10.0.1 html 253 370 1 false 74 0 false 7 false false R1.htm 100000 - Document - Document and Entity Information Sheet http://www.everbridge.com/20180930/taxonomy/role/DocumentDocumentAndEntityInformation Document and Entity Information Cover 1 false false R2.htm 100010 - Statement - Condensed Consolidated Balance Sheets (Unaudited) Sheet http://www.everbridge.com/20180930/taxonomy/role/StatementCondensedConsolidatedBalanceSheetsUnaudited Condensed Consolidated Balance Sheets (Unaudited) Statements 2 false false R3.htm 100020 - Statement - Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) Sheet http://www.everbridge.com/20180930/taxonomy/role/StatementCondensedConsolidatedBalanceSheetsUnauditedParenthetical Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) Statements 3 false false R4.htm 100030 - Statement - Condensed Consolidated Statements of Operations (Unaudited) Sheet http://www.everbridge.com/20180930/taxonomy/role/StatementCondensedConsolidatedStatementsOfOperationsUnaudited Condensed Consolidated Statements of Operations (Unaudited) Statements 4 false false R5.htm 100040 - Statement - Condensed Consolidated Statements of Comprehensive Loss Sheet http://www.everbridge.com/20180930/taxonomy/role/StatementCondensedConsolidatedStatementsOfComprehensiveLoss Condensed Consolidated Statements of Comprehensive Loss Statements 5 false false R6.htm 100050 - Statement - Consolidated Statements of Stockholders' Equity (unaudited) Sheet http://www.everbridge.com/20180930/taxonomy/role/StatementConsolidatedStatementsOfStockholdersEquityUnaudited Consolidated Statements of Stockholders' Equity (unaudited) Statements 6 false false R7.htm 100060 - Statement - Condensed Consolidated Statements of Cash Flows (unaudited) Sheet http://www.everbridge.com/20180930/taxonomy/role/StatementCondensedConsolidatedStatementsOfCashFlowsUnaudited Condensed Consolidated Statements of Cash Flows (unaudited) Statements 7 false false R8.htm 100070 - Disclosure - Business and Nature of Operations Sheet http://www.everbridge.com/20180930/taxonomy/role/DisclosureBusinessAndNatureOfOperations Business and Nature of Operations Notes 8 false false R9.htm 100080 - Disclosure - Summary of Significant Accounting Policies Sheet http://www.everbridge.com/20180930/taxonomy/role/DisclosureSummaryOfSignificantAccountingPolicies Summary of Significant Accounting Policies Notes 9 false false R10.htm 100090 - Disclosure - Accounts Receivable, Net Sheet http://www.everbridge.com/20180930/taxonomy/role/DisclosureAccountsReceivableNet Accounts Receivable, Net Notes 10 false false R11.htm 100100 - Disclosure - Property and Equipment, Net Sheet http://www.everbridge.com/20180930/taxonomy/role/DisclosurePropertyAndEquipmentNet Property and Equipment, Net Notes 11 false false R12.htm 100110 - Disclosure - Capitalized Software Development Costs Sheet http://www.everbridge.com/20180930/taxonomy/role/DisclosureCapitalizedSoftwareDevelopmentCosts Capitalized Software Development Costs Notes 12 false false R13.htm 100120 - Disclosure - Fair Value Measurements Sheet http://www.everbridge.com/20180930/taxonomy/role/DisclosureFairValueMeasurements Fair Value Measurements Notes 13 false false R14.htm 100130 - Disclosure - Goodwill and Intangible Assets, Net Sheet http://www.everbridge.com/20180930/taxonomy/role/DisclosureGoodwillAndIntangibleAssetsNet Goodwill and Intangible Assets, Net Notes 14 false false R15.htm 100140 - Disclosure - Acquisitions Sheet http://www.everbridge.com/20180930/taxonomy/role/DisclosureAcquisitions Acquisitions Notes 15 false false R16.htm 100150 - Disclosure - Convertible Senior Notes Notes http://www.everbridge.com/20180930/taxonomy/role/DisclosureConvertibleSeniorNotes Convertible Senior Notes Notes 16 false false R17.htm 100160 - Disclosure - Stockholders' Equity Sheet http://www.everbridge.com/20180930/taxonomy/role/DisclosureStockholdersEquity Stockholders' Equity Notes 17 false false R18.htm 100170 - Disclosure - Stock Plans and Stock-Based Compensation Sheet http://www.everbridge.com/20180930/taxonomy/role/DisclosureStockPlansAndStockBasedCompensation Stock Plans and Stock-Based Compensation Notes 18 false false R19.htm 100180 - Disclosure - Basic and Diluted Net Loss Per Share Sheet http://www.everbridge.com/20180930/taxonomy/role/DisclosureBasicAndDilutedNetLossPerShare Basic and Diluted Net Loss Per Share Notes 19 false false R20.htm 100190 - Disclosure - Income Taxes Sheet http://www.everbridge.com/20180930/taxonomy/role/DisclosureIncomeTaxes Income Taxes Notes 20 false false R21.htm 100200 - Disclosure - Segment Information Sheet http://www.everbridge.com/20180930/taxonomy/role/DisclosureSegmentInformation Segment Information Notes 21 false false R22.htm 100210 - Disclosure - Revenue Recognition Sheet http://www.everbridge.com/20180930/taxonomy/role/DisclosureRevenueRecognition Revenue Recognition Notes 22 false false R23.htm 100220 - Disclosure - Commitments and Contingencies Sheet http://www.everbridge.com/20180930/taxonomy/role/DisclosureCommitmentsAndContingencies Commitments and Contingencies Notes 23 false false R24.htm 100230 - Disclosure - Subsequent Events Sheet http://www.everbridge.com/20180930/taxonomy/role/DisclosureSubsequentEvents Subsequent Events Notes 24 false false R25.htm 100240 - Disclosure - Summary of Significant Accounting Policies (Policies) Sheet http://www.everbridge.com/20180930/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesPolicies Summary of Significant Accounting Policies (Policies) Policies http://www.everbridge.com/20180930/taxonomy/role/DisclosureSummaryOfSignificantAccountingPolicies 25 false false R26.htm 100250 - Disclosure - Accounts Receivable, Net (Tables) Sheet http://www.everbridge.com/20180930/taxonomy/role/DisclosureAccountsReceivableNetTables Accounts Receivable, Net (Tables) Tables http://www.everbridge.com/20180930/taxonomy/role/DisclosureAccountsReceivableNet 26 false false R27.htm 100260 - Disclosure - Property and Equipment, Net (Tables) Sheet http://www.everbridge.com/20180930/taxonomy/role/DisclosurePropertyAndEquipmentNetTables Property and Equipment, Net (Tables) Tables http://www.everbridge.com/20180930/taxonomy/role/DisclosurePropertyAndEquipmentNet 27 false false R28.htm 100270 - Disclosure - Capitalized Software Development Costs (Tables) Sheet http://www.everbridge.com/20180930/taxonomy/role/DisclosureCapitalizedSoftwareDevelopmentCostsTables Capitalized Software Development Costs (Tables) Tables http://www.everbridge.com/20180930/taxonomy/role/DisclosureCapitalizedSoftwareDevelopmentCosts 28 false false R29.htm 100280 - Disclosure - Fair Value Measurements (Tables) Sheet http://www.everbridge.com/20180930/taxonomy/role/DisclosureFairValueMeasurementsTables Fair Value Measurements (Tables) Tables http://www.everbridge.com/20180930/taxonomy/role/DisclosureFairValueMeasurements 29 false false R30.htm 100290 - Disclosure - Goodwill and Intangible Assets, Net (Tables) Sheet http://www.everbridge.com/20180930/taxonomy/role/DisclosureGoodwillAndIntangibleAssetsNetTables Goodwill and Intangible Assets, Net (Tables) Tables http://www.everbridge.com/20180930/taxonomy/role/DisclosureGoodwillAndIntangibleAssetsNet 30 false false R31.htm 100300 - Disclosure - Acquisitions (Tables) Sheet http://www.everbridge.com/20180930/taxonomy/role/DisclosureAcquisitionsTables Acquisitions (Tables) Tables http://www.everbridge.com/20180930/taxonomy/role/DisclosureAcquisitions 31 false false R32.htm 100310 - Disclosure - Convertible Senior Notes (Tables) Notes http://www.everbridge.com/20180930/taxonomy/role/DisclosureConvertibleSeniorNotesTables Convertible Senior Notes (Tables) Tables http://www.everbridge.com/20180930/taxonomy/role/DisclosureConvertibleSeniorNotes 32 false false R33.htm 100320 - Disclosure - Stock Plans and Stock-Based Compensation (Tables) Sheet http://www.everbridge.com/20180930/taxonomy/role/DisclosureStockPlansAndStockBasedCompensationTables Stock Plans and Stock-Based Compensation (Tables) Tables http://www.everbridge.com/20180930/taxonomy/role/DisclosureStockPlansAndStockBasedCompensation 33 false false R34.htm 100330 - Disclosure - Basic and Diluted Net Loss Per Share (Tables) Sheet http://www.everbridge.com/20180930/taxonomy/role/DisclosureBasicAndDilutedNetLossPerShareTables Basic and Diluted Net Loss Per Share (Tables) Tables http://www.everbridge.com/20180930/taxonomy/role/DisclosureBasicAndDilutedNetLossPerShare 34 false false R35.htm 100340 - Disclosure - Revenue Recognition (Tables) Sheet http://www.everbridge.com/20180930/taxonomy/role/DisclosureRevenueRecognitionTables Revenue Recognition (Tables) Tables http://www.everbridge.com/20180930/taxonomy/role/DisclosureRevenueRecognition 35 false false R36.htm 100350 - Disclosure - Commitments and Contingencies (Tables) Sheet http://www.everbridge.com/20180930/taxonomy/role/DisclosureCommitmentsAndContingenciesTables Commitments and Contingencies (Tables) Tables http://www.everbridge.com/20180930/taxonomy/role/DisclosureCommitmentsAndContingencies 36 false false R37.htm 100360 - Disclosure - Summary of Significant Accounting Policies - Additional Information (Detail) Sheet http://www.everbridge.com/20180930/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesAdditionalInformationDetail Summary of Significant Accounting Policies - Additional Information (Detail) Details 37 false false R38.htm 100370 - Disclosure - Accounts Receivable, Net - Schedule of Accounts Receivable Net (Details) Sheet http://www.everbridge.com/20180930/taxonomy/role/DisclosureAccountsReceivableNetScheduleOfAccountsReceivableNetDetails Accounts Receivable, Net - Schedule of Accounts Receivable Net (Details) Details 38 false false R39.htm 100380 - Disclosure - Accounts Receivable, Net - Additional Information (Details) Sheet http://www.everbridge.com/20180930/taxonomy/role/DisclosureAccountsReceivableNetAdditionalInformationDetails Accounts Receivable, Net - Additional Information (Details) Details 39 false false R40.htm 100390 - Disclosure - Accounts Receivable, Net - Schedule of Changes in Allowance for Doubtful Accounts (Details) Sheet http://www.everbridge.com/20180930/taxonomy/role/DisclosureAccountsReceivableNetScheduleOfChangesInAllowanceForDoubtfulAccountsDetails Accounts Receivable, Net - Schedule of Changes in Allowance for Doubtful Accounts (Details) Details 40 false false R41.htm 100400 - Disclosure - Accounts Receivable, Net - Schedule of Changes in Sales Reserve (Details) Sheet http://www.everbridge.com/20180930/taxonomy/role/DisclosureAccountsReceivableNetScheduleOfChangesInSalesReserveDetails Accounts Receivable, Net - Schedule of Changes in Sales Reserve (Details) Details 41 false false R42.htm 100410 - Disclosure - Property and Equipment, Net - Schedule of Property and Equipment (Detail) Sheet http://www.everbridge.com/20180930/taxonomy/role/DisclosurePropertyAndEquipmentNetScheduleOfPropertyAndEquipmentDetail Property and Equipment, Net - Schedule of Property and Equipment (Detail) Details 42 false false R43.htm 100420 - Disclosure - Property and Equipment, Net - Additional Information (Detail) Sheet http://www.everbridge.com/20180930/taxonomy/role/DisclosurePropertyAndEquipmentNetAdditionalInformationDetail Property and Equipment, Net - Additional Information (Detail) Details 43 false false R44.htm 100430 - Disclosure - Capitalized Software Development Costs - Summary of Capitalized Software Development Costs (Detail) Sheet http://www.everbridge.com/20180930/taxonomy/role/DisclosureCapitalizedSoftwareDevelopmentCostsSummaryOfCapitalizedSoftwareDevelopmentCostsDetail Capitalized Software Development Costs - Summary of Capitalized Software Development Costs (Detail) Details 44 false false R45.htm 100440 - Disclosure - Capitalized Software Development Costs - Additional Information (Details) Sheet http://www.everbridge.com/20180930/taxonomy/role/DisclosureCapitalizedSoftwareDevelopmentCostsAdditionalInformationDetails Capitalized Software Development Costs - Additional Information (Details) Details 45 false false R46.htm 100450 - Disclosure - Capitalized Software Development Costs - Schedule of Expected Amortization of Capitalized Software Development Costs (Details) Sheet http://www.everbridge.com/20180930/taxonomy/role/DisclosureCapitalizedSoftwareDevelopmentCostsScheduleOfExpectedAmortizationOfCapitalizedSoftwareDevelopmentCostsDetails Capitalized Software Development Costs - Schedule of Expected Amortization of Capitalized Software Development Costs (Details) Details 46 false false R47.htm 100460 - Disclosure - Fair Value Measurements - Additional Information (Details) Sheet http://www.everbridge.com/20180930/taxonomy/role/DisclosureFairValueMeasurementsAdditionalInformationDetails Fair Value Measurements - Additional Information (Details) Details 47 false false R48.htm 100470 - Disclosure - Fair Value Measurements - Summary of Financial Assets and Liabilities Measured at Fair Value on Recurring Basis (Details) Sheet http://www.everbridge.com/20180930/taxonomy/role/DisclosureFairValueMeasurementsSummaryOfFinancialAssetsAndLiabilitiesMeasuredAtFairValueOnRecurringBasisDetails Fair Value Measurements - Summary of Financial Assets and Liabilities Measured at Fair Value on Recurring Basis (Details) Details 48 false false R49.htm 100480 - Disclosure - Fair Value Measurements - Summary of Changes in Level 3 Financial Instruments (Details) Sheet http://www.everbridge.com/20180930/taxonomy/role/DisclosureFairValueMeasurementsSummaryOfChangesInLevel3FinancialInstrumentsDetails Fair Value Measurements - Summary of Changes in Level 3 Financial Instruments (Details) Details 49 false false R50.htm 100490 - Disclosure - Goodwill and Intangible Assets, Net - Additional Information (Details) Sheet http://www.everbridge.com/20180930/taxonomy/role/DisclosureGoodwillAndIntangibleAssetsNetAdditionalInformationDetails Goodwill and Intangible Assets, Net - Additional Information (Details) Details 50 false false R51.htm 100500 - Disclosure - Goodwill and Intangible Assets, Net - Schedule of Changes in Gross Carrying Amount of Goodwill (Details) Sheet http://www.everbridge.com/20180930/taxonomy/role/DisclosureGoodwillAndIntangibleAssetsNetScheduleOfChangesInGrossCarryingAmountOfGoodwillDetails Goodwill and Intangible Assets, Net - Schedule of Changes in Gross Carrying Amount of Goodwill (Details) Details 51 false false R52.htm 100510 - Disclosure - Goodwill and Intangible Assets, Net - Schedule of Intangible Assets (Details) Sheet http://www.everbridge.com/20180930/taxonomy/role/DisclosureGoodwillAndIntangibleAssetsNetScheduleOfIntangibleAssetsDetails Goodwill and Intangible Assets, Net - Schedule of Intangible Assets (Details) Details 52 false false R53.htm 100520 - Disclosure - Goodwill and Intangible Assets, Net - Schedule of Expected Amortization of Intangible Assets (Details) Sheet http://www.everbridge.com/20180930/taxonomy/role/DisclosureGoodwillAndIntangibleAssetsNetScheduleOfExpectedAmortizationOfIntangibleAssetsDetails Goodwill and Intangible Assets, Net - Schedule of Expected Amortization of Intangible Assets (Details) Details 53 false false R54.htm 100530 - Disclosure - Acquisitions - Additional Information (Details) Sheet http://www.everbridge.com/20180930/taxonomy/role/DisclosureAcquisitionsAdditionalInformationDetails Acquisitions - Additional Information (Details) Details 54 false false R55.htm 100540 - Disclosure - Acquisitions - Summary of Allocation of Purchase Consideration and Estimated Values of Assets Acquired and Liabilities Assumed (Details) Sheet http://www.everbridge.com/20180930/taxonomy/role/DisclosureAcquisitionsSummaryOfAllocationOfPurchaseConsiderationAndEstimatedValuesOfAssetsAcquiredAndLiabilitiesAssumedDetails Acquisitions - Summary of Allocation of Purchase Consideration and Estimated Values of Assets Acquired and Liabilities Assumed (Details) Details 55 false false R56.htm 100550 - Disclosure - Acquisitions - Summary of Unaudited Pro Forma Results of Operations (Details) Sheet http://www.everbridge.com/20180930/taxonomy/role/DisclosureAcquisitionsSummaryOfUnauditedProFormaResultsOfOperationsDetails Acquisitions - Summary of Unaudited Pro Forma Results of Operations (Details) Details 56 false false R57.htm 100560 - Disclosure - Convertible Senior Notes - Additional Information (Details) Notes http://www.everbridge.com/20180930/taxonomy/role/DisclosureConvertibleSeniorNotesAdditionalInformationDetails Convertible Senior Notes - Additional Information (Details) Details 57 false false R58.htm 100570 - Disclosure - Convertible Senior Notes - Schedule of Components of Convertible Senior Notes (Details) Notes http://www.everbridge.com/20180930/taxonomy/role/DisclosureConvertibleSeniorNotesScheduleOfComponentsOfConvertibleSeniorNotesDetails Convertible Senior Notes - Schedule of Components of Convertible Senior Notes (Details) Details 58 false false R59.htm 100580 - Disclosure - Convertible Senior Notes - Schedule of Components of Convertible Senior Notes (Parenthetical) (Details) Notes http://www.everbridge.com/20180930/taxonomy/role/DisclosureConvertibleSeniorNotesScheduleOfComponentsOfConvertibleSeniorNotesParentheticalDetails Convertible Senior Notes - Schedule of Components of Convertible Senior Notes (Parenthetical) (Details) Details 59 false false R60.htm 100590 - Disclosure - Convertible Senior Notes - Summary of Total Interest Expense Recognized Related To Convertible Senior Notes (Details) Notes http://www.everbridge.com/20180930/taxonomy/role/DisclosureConvertibleSeniorNotesSummaryOfTotalInterestExpenseRecognizedRelatedToConvertibleSeniorNotesDetails Convertible Senior Notes - Summary of Total Interest Expense Recognized Related To Convertible Senior Notes (Details) Details 60 false false R61.htm 100600 - Disclosure - Convertible Senior Notes - Summary of Total Interest Expense Recognized Related To Convertible Senior Notes (Parenthetical) (Details) Notes http://www.everbridge.com/20180930/taxonomy/role/DisclosureConvertibleSeniorNotesSummaryOfTotalInterestExpenseRecognizedRelatedToConvertibleSeniorNotesParentheticalDetails Convertible Senior Notes - Summary of Total Interest Expense Recognized Related To Convertible Senior Notes (Parenthetical) (Details) Details 61 false false R62.htm 100610 - Disclosure - Convertible Senior Notes - Summary of Fair Value and Carrying Value of Convertible Senior Notes (Details) Notes http://www.everbridge.com/20180930/taxonomy/role/DisclosureConvertibleSeniorNotesSummaryOfFairValueAndCarryingValueOfConvertibleSeniorNotesDetails Convertible Senior Notes - Summary of Fair Value and Carrying Value of Convertible Senior Notes (Details) Details 62 false false R63.htm 100620 - Disclosure - Stockholders' Equity - Additional Information (Details) Sheet http://www.everbridge.com/20180930/taxonomy/role/DisclosureStockholdersEquityAdditionalInformationDetails Stockholders' Equity - Additional Information (Details) Details 63 false false R64.htm 100630 - Disclosure - Stock Plans and Stock-Based Compensation - Additional Information (Details) Sheet http://www.everbridge.com/20180930/taxonomy/role/DisclosureStockPlansAndStockBasedCompensationAdditionalInformationDetails Stock Plans and Stock-Based Compensation - Additional Information (Details) Details 64 false false R65.htm 100640 - Disclosure - Stock Plans and Stock-Based Compensation - 2016 Employee Stock Purchase Plan - Additional Information (Details) Sheet http://www.everbridge.com/20180930/taxonomy/role/DisclosureStockPlansAndStockBasedCompensation2016EmployeeStockPurchasePlanAdditionalInformationDetails Stock Plans and Stock-Based Compensation - 2016 Employee Stock Purchase Plan - Additional Information (Details) Details 65 false false R66.htm 100650 - Disclosure - Stock Plans and Stock-Based Compensation - Stock Options - Additional Information (Details) Sheet http://www.everbridge.com/20180930/taxonomy/role/DisclosureStockPlansAndStockBasedCompensationStockOptionsAdditionalInformationDetails Stock Plans and Stock-Based Compensation - Stock Options - Additional Information (Details) Details 66 false false R67.htm 100660 - Disclosure - Stock Plans and Stock-Based Compensation - Schedule of Assumptions Used in Determining Fair Value of Stock Option Grants (Details) Sheet http://www.everbridge.com/20180930/taxonomy/role/DisclosureStockPlansAndStockBasedCompensationScheduleOfAssumptionsUsedInDeterminingFairValueOfStockOptionGrantsDetails Stock Plans and Stock-Based Compensation - Schedule of Assumptions Used in Determining Fair Value of Stock Option Grants (Details) Details 67 false false R68.htm 100670 - Disclosure - Stock Plans and Stock-Based Compensation - Schedule of Assumptions Used in Determining Fair Value of Stock Option Grants (Parenthetical) (Details) Sheet http://www.everbridge.com/20180930/taxonomy/role/DisclosureStockPlansAndStockBasedCompensationScheduleOfAssumptionsUsedInDeterminingFairValueOfStockOptionGrantsParentheticalDetails Stock Plans and Stock-Based Compensation - Schedule of Assumptions Used in Determining Fair Value of Stock Option Grants (Parenthetical) (Details) Details 68 false false R69.htm 100680 - Disclosure - Stock Plans and Stock-Based Compensation - Schedule of Stock Option Activity (Details) Sheet http://www.everbridge.com/20180930/taxonomy/role/DisclosureStockPlansAndStockBasedCompensationScheduleOfStockOptionActivityDetails Stock Plans and Stock-Based Compensation - Schedule of Stock Option Activity (Details) Details 69 false false R70.htm 100690 - Disclosure - Stock Plans and Stock-Based Compensation - Schedule of Stock Options Outstanding and Options Exercisable and Vested (Details) Sheet http://www.everbridge.com/20180930/taxonomy/role/DisclosureStockPlansAndStockBasedCompensationScheduleOfStockOptionsOutstandingAndOptionsExercisableAndVestedDetails Stock Plans and Stock-Based Compensation - Schedule of Stock Options Outstanding and Options Exercisable and Vested (Details) Details 70 false false R71.htm 100700 - Disclosure - Stock Plans and Stock-Based Compensation - Schedule of Vested and Nonvested Stock Option Activity (Details) Sheet http://www.everbridge.com/20180930/taxonomy/role/DisclosureStockPlansAndStockBasedCompensationScheduleOfVestedAndNonvestedStockOptionActivityDetails Stock Plans and Stock-Based Compensation - Schedule of Vested and Nonvested Stock Option Activity (Details) Details 71 false false R72.htm 100710 - Disclosure - Stock Plans and Stock-Based Compensation - Restricted Stock Units - Additional Information (Details) Sheet http://www.everbridge.com/20180930/taxonomy/role/DisclosureStockPlansAndStockBasedCompensationRestrictedStockUnitsAdditionalInformationDetails Stock Plans and Stock-Based Compensation - Restricted Stock Units - Additional Information (Details) Details 72 false false R73.htm 100720 - Disclosure - Stock Plans and Stock-Based Compensation - Performance-Based Restricted Stock Units - Additional Information (Details) Sheet http://www.everbridge.com/20180930/taxonomy/role/DisclosureStockPlansAndStockBasedCompensationPerformanceBasedRestrictedStockUnitsAdditionalInformationDetails Stock Plans and Stock-Based Compensation - Performance-Based Restricted Stock Units - Additional Information (Details) Details 73 false false R74.htm 100730 - Disclosure - Stock Plans and Stock-Based Compensation - Market-Based Restricted Stock Units - Additional Information (Details) Sheet http://www.everbridge.com/20180930/taxonomy/role/DisclosureStockPlansAndStockBasedCompensationMarketBasedRestrictedStockUnitsAdditionalInformationDetails Stock Plans and Stock-Based Compensation - Market-Based Restricted Stock Units - Additional Information (Details) Details 74 false false R75.htm 100740 - Disclosure - Stock Plans and Stock-Based Compensation - Summary of Activity in Connection with RSUs, Market-based RSUs and RSUs (Details) Sheet http://www.everbridge.com/20180930/taxonomy/role/DisclosureStockPlansAndStockBasedCompensationSummaryOfActivityInConnectionWithRsusMarketBasedRsusAndRsusDetails Stock Plans and Stock-Based Compensation - Summary of Activity in Connection with RSUs, Market-based RSUs and RSUs (Details) Details 75 false false R76.htm 100750 - Disclosure - Stock Plans and Stock-Based Compensation - Summary of Stock-Based Compensation Expense (Details) Sheet http://www.everbridge.com/20180930/taxonomy/role/DisclosureStockPlansAndStockBasedCompensationSummaryOfStockBasedCompensationExpenseDetails Stock Plans and Stock-Based Compensation - Summary of Stock-Based Compensation Expense (Details) Details 76 false false R77.htm 100760 - Disclosure - Basic and Diluted Net Loss Per Share - Schedule of Common Equivalent Shares were Excluded From Diluted Net Loss Per Share Calculation because their Inclusion would have been Anti-Dilutive (Details) Sheet http://www.everbridge.com/20180930/taxonomy/role/DisclosureBasicAndDilutedNetLossPerShareScheduleOfCommonEquivalentSharesWereExcludedFromDilutedNetLossPerShareCalculationBecauseTheirInclusionWouldHaveBeenAntiDilutiveDetails Basic and Diluted Net Loss Per Share - Schedule of Common Equivalent Shares were Excluded From Diluted Net Loss Per Share Calculation because their Inclusion would have been Anti-Dilutive (Details) Details 77 false false R78.htm 100770 - Disclosure - Basic and Diluted Net Loss Per Share - Summary of Common Stock Reserved (Details) Sheet http://www.everbridge.com/20180930/taxonomy/role/DisclosureBasicAndDilutedNetLossPerShareSummaryOfCommonStockReservedDetails Basic and Diluted Net Loss Per Share - Summary of Common Stock Reserved (Details) Details 78 false false R79.htm 100780 - Disclosure - Basic and Diluted Net Loss per Share - Additional Information (Details) Sheet http://www.everbridge.com/20180930/taxonomy/role/DisclosureBasicAndDilutedNetLossPerShareAdditionalInformationDetails Basic and Diluted Net Loss per Share - Additional Information (Details) Details 79 false false R80.htm 100790 - Disclosure - Income Taxes - Additional Information (Details) Sheet http://www.everbridge.com/20180930/taxonomy/role/DisclosureIncomeTaxesAdditionalInformationDetails Income Taxes - Additional Information (Details) Details 80 false false R81.htm 100800 - Disclosure - Segment Information - Additional Information (Details) Sheet http://www.everbridge.com/20180930/taxonomy/role/DisclosureSegmentInformationAdditionalInformationDetails Segment Information - Additional Information (Details) Details 81 false false R82.htm 100810 - Disclosure - Revenue Recognition - Summary of Impact of Adoption of New Revenue Standard on Consolidated Balance Sheet (Detail) Sheet http://www.everbridge.com/20180930/taxonomy/role/DisclosureRevenueRecognitionSummaryOfImpactOfAdoptionOfNewRevenueStandardOnConsolidatedBalanceSheetDetail Revenue Recognition - Summary of Impact of Adoption of New Revenue Standard on Consolidated Balance Sheet (Detail) Details 82 false false R83.htm 100820 - Disclosure - Revenue Recognition - Summary of Impact of Adoption on Consolidated Statement of Operations (Detail) Sheet http://www.everbridge.com/20180930/taxonomy/role/DisclosureRevenueRecognitionSummaryOfImpactOfAdoptionOnConsolidatedStatementOfOperationsDetail Revenue Recognition - Summary of Impact of Adoption on Consolidated Statement of Operations (Detail) Details 83 false false R84.htm 100830 - Disclosure - Revenue Recognition - Summary of Disaggregates Our Revenue by Geography (Detail) Sheet http://www.everbridge.com/20180930/taxonomy/role/DisclosureRevenueRecognitionSummaryOfDisaggregatesOurRevenueByGeographyDetail Revenue Recognition - Summary of Disaggregates Our Revenue by Geography (Detail) Details 84 false false R85.htm 100840 - Disclosure - Revenue Recognition - Summary of Revenues Disaggregated by Revenue Source (Detail) Sheet http://www.everbridge.com/20180930/taxonomy/role/DisclosureRevenueRecognitionSummaryOfRevenuesDisaggregatedByRevenueSourceDetail Revenue Recognition - Summary of Revenues Disaggregated by Revenue Source (Detail) Details 85 false false R86.htm 100850 - Disclosure - Revenue Recognition - Additional Information (Details) Sheet http://www.everbridge.com/20180930/taxonomy/role/DisclosureRevenueRecognitionAdditionalInformationDetails Revenue Recognition - Additional Information (Details) Details 86 false false R87.htm 100860 - Disclosure - Revenue Recognition - Remaining Performance Obligations - Additional Information (Details 1) Sheet http://www.everbridge.com/20180930/taxonomy/role/DisclosureRevenueRecognitionRemainingPerformanceObligationsAdditionalInformationDetails1 Revenue Recognition - Remaining Performance Obligations - Additional Information (Details 1) Details 87 false false R88.htm 100870 - Disclosure - Commitments and Contingencies - Schedule of Future Minimum Lease Payments (Details) Sheet http://www.everbridge.com/20180930/taxonomy/role/DisclosureCommitmentsAndContingenciesScheduleOfFutureMinimumLeasePaymentsDetails Commitments and Contingencies - Schedule of Future Minimum Lease Payments (Details) Details 88 false false R89.htm 100880 - Disclosure - Commitments and Contingencies - Additional Information (Details) Sheet http://www.everbridge.com/20180930/taxonomy/role/DisclosureCommitmentsAndContingenciesAdditionalInformationDetails Commitments and Contingencies - Additional Information (Details) Details 89 false false All Reports Book All Reports evbg-20180930.xml evbg-20180930.xsd evbg-20180930_cal.xml evbg-20180930_def.xml evbg-20180930_lab.xml evbg-20180930_pre.xml http://fasb.org/us-gaap/2018-01-31 http://xbrl.sec.gov/country/2017-01-31 http://fasb.org/srt/2018-01-31 http://xbrl.sec.gov/dei/2018-01-31 true true