Disclosure of Compensation Related Costs, Share-based Payments [Abstract] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Award Type [Axis] Award Type [Axis] Equity Award [Domain] Equity Award [Domain] Restricted Stock Units (RSUs) Restricted Stock Units (RSUs) [Member] Employee Stock Option Employee Stock Option [Member] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Weighted-average grant date fair value (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value Intrinsic value Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value Stock options vested, fair value Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested in Period, Fair Value Share-based compensation cost not yet recognized Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Stock Options Share-based compensation, period for recognition Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition Accounting Policies [Abstract] Basis of Presentation Basis of Accounting, Policy [Policy Text Block] Use of Estimates Use of Estimates, Policy [Policy Text Block] Emerging Growth Company Status Emerging Growth Company Status, Policy [Policy Text Block] Emerging Growth Company Status, Policy [Policy Text Block] Foreign Currency Foreign Currency Transactions and Translations Policy [Policy Text Block] Comprehensive Loss Comprehensive Income, Policy [Policy Text Block] Cash and Cash Equivalents Cash and Cash Equivalents, Unrestricted Cash and Cash Equivalents, Policy [Policy Text Block] Marketable Securities Marketable Securities, Policy [Policy Text Block] Restricted Cash Cash and Cash Equivalents, Restricted Cash and Cash Equivalents, Policy [Policy Text Block] Fair Value of Financial Instruments Fair Value of Financial Instruments, Policy [Policy Text Block] Concentration of Credit Risk Concentration Risk, Credit Risk, Policy [Policy Text Block] Capitalized Software Costs Software to be Sold, Leased, or Otherwise Marketed, Policy [Policy Text Block] Property and Equipment Property, Plant and Equipment, Policy [Policy Text Block] Business Combinations Business Combinations Policy [Policy Text Block] Long-Lived Assets, Including Other Acquired Intangible Assets Impairment or Disposal of Long-Lived Assets, Including Intangible Assets, Policy [Policy Text Block] Goodwill Goodwill and Intangible Assets, Goodwill, Policy [Policy Text Block] Deferred Rent Deferred Charges, Policy [Policy Text Block] Revenue Recognition Revenue from Contract with Customer [Policy Text Block] Accounts Receivable and Allowance for Doubtful Accounts Trade and Other Accounts Receivable, Policy [Policy Text Block] Convertible Senior Notes Debt, Policy [Policy Text Block] Research and Development Research and Development Expense, Policy [Policy Text Block] Advertising Advertising Costs, Policy [Policy Text Block] Stock-Based Compensation Share-based Compensation, Option and Incentive Plans Policy [Policy Text Block] Net Loss per Share Earnings Per Share, Policy [Policy Text Block] Segment Information Segment Reporting, Policy [Policy Text Block] Income Taxes Income Tax, Policy [Policy Text Block] Related Party Transactions Related Party Transactions, Policy [Policy Text Block] Related Party Transactions, Policy [Policy Text Block] Recently Adopted and New Accounting Pronouncements Not Yet Adopted New Accounting Pronouncements, Policy [Policy Text Block] Statement of Comprehensive Income [Abstract] Net loss Net Income (Loss) Attributable to Parent Other comprehensive income (loss), net of tax: Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent [Abstract] Unrealized gain (loss) on available-for-sale securities Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax, Portion Attributable to Parent Foreign currency translation adjustments Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Portion Attributable to Parent Other comprehensive income (loss) Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent Total comprehensive loss Comprehensive Income (Loss), Net of Tax, Attributable to Parent Income Statement Location [Axis] Income Statement Location [Axis] Income Statement Location [Domain] Income Statement Location [Domain] Cost of revenue—subscription Cost of Revenue - 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Provisional decrease to valuation allowance Tax Cuts And Jobs Act of 2017, Incomplete Accounting, Change In Tax Rate, Deferred Tax Asset, Valuation Allowance, Provisional Income Tax Expense (Benefit) Tax Cuts And Jobs Act of 2017, Incomplete Accounting, Change In Tax Rate, Deferred Tax Asset, Valuation Allowance, Provisional Income Tax Expense (Benefit) Valuation allowance Deferred Tax Assets, Valuation Allowance Operating Loss Carryforwards [Table] Operating Loss Carryforwards [Table] Tax Credit Carryforward [Axis] Tax Credit Carryforward [Axis] Tax Credit Carryforward, Name [Domain] Tax Credit Carryforward, Name [Domain] Research Tax Credit Carryforward Research Tax Credit Carryforward [Member] Income Tax Authority [Axis] Income Tax Authority [Axis] Income Tax Authority [Domain] Income Tax Authority [Domain] Domestic Tax Authority Domestic Tax Authority [Member] State and Local Jurisdiction State and Local Jurisdiction [Member] Foreign Tax Authority Foreign Tax Authority [Member] 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Class of Stock [Axis] Class of Stock [Domain] Class of Stock [Domain] Class A Common Stock Common Class A [Member] Reserved for future issuance (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized Maximum employee contribution rate Share-based Compensation Arrangement by Share-based Payment Award, Maximum Employee Subscription Rate Duration of separate offering periods Share-based Compensation Arrangement by Share-based Payment Award, Duration Of Offering Periods Share-based Compensation Arrangement by Share-based Payment Award, Duration Of Offering Periods Purchase price of common stock, as a percent Share-based Compensation Arrangement by Share-based Payment Award, Purchase Price of Common Stock, Percent Shares issued (in shares) Stock Issued During Period, Shares, Employee Stock Purchase Plans Stock-based compensation expense Revenue from Contract with Customer [Abstract] Disaggregation of Revenue [Table] Disaggregation of 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Assets by Major Class [Axis] Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets, Major Class Name [Domain] Finite-Lived Intangible Assets, Major Class Name [Domain] Customer relationships Customer Relationships [Member] Developed Technology Technology-Based Intangible Assets [Member] Business Acquisition [Line Items] Business Acquisition [Line Items] Purchase price pursuant to the Merger Agreement Payments to Acquire Businesses, Gross Consideration transferred Business Combination, Consideration Transferred Excess cash amount Payments To Acquire Businesses, Excess Cash Amount Payments To Acquire Businesses, Excess Cash Amount Time-based payment to founders Business Combination, Consideration Transferred, Liabilities Incurred Number of founders Business Combination, Consideration Transferred, Liabilities Incurred, Number Of Founders Business Combination, Consideration Transferred, Liabilities Incurred, Number Of Founders Time-based payment, current percentage of total Business Combination, Consideration Transferred, Liabilities Incurred, Current, Percent Business Combination, Consideration Transferred, Liabilities Incurred, Current, Percent Time-based payment, non-current percentage of total Business Combination, Consideration Transferred, Liabilities Incurred, Noncurrent, Percent Business Combination, Consideration Transferred, Liabilities Incurred, Noncurrent, Percent Weighted average useful life Acquired Finite-lived Intangible Assets, Weighted Average Useful Life Number of acquired finite-lived intangible assets Number Of Acquired Finite-Lived Intangible Assets Number Of Acquired Finite-Lived Intangible Assets Goodwill expected to be tax deductible Business Acquisition, Goodwill, Expected Tax Deductible Amount Goodwill resulting from deferred tax liabilities Deferred Tax Liabilities, Goodwill Acquisition-related costs Business Combination, Acquisition Related Costs Debt Disclosure [Abstract] Convertible debt schedules Convertible Debt [Table Text Block] Interest expense related to Notes Interest Income and Interest Expense Disclosure [Table Text Block] Document Information [Abstract] Document Information [Abstract] Entity Registrant Name Entity Registrant Name Entity Central Index Key Entity Central Index Key Current Fiscal Year End Date Current Fiscal Year End Date Entity Filer Category Entity Filer Category Document Type Document Type Document Period End Date Document Period End Date Document Fiscal Year Focus Document Fiscal Year Focus Document Fiscal Period Focus Document Fiscal Period Focus Amendment Flag Amendment Flag Entity Well-known Seasoned Issuer Entity Well-known Seasoned Issuer Entity Voluntary Filers Entity Voluntary Filers Entity Current Reporting Status Entity Current Reporting Status Entity Emerging Growth Company Entity Emerging Growth Company Entity Small Business Entity Small Business Entity Shell Company Entity Shell Company Statement [Table] Statement [Table] Class B Common Stock Common Class B [Member] Statement [Line Items] Statement [Line Items] Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Entity Public Float Entity Public Float Earnings Per Share [Abstract] Net Loss per Share Earnings Per Share [Text Block] Organization, Consolidation and Presentation of Financial Statements [Abstract] Organization and Description of Business Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] Advertising costs Advertising Expense Deferred tax assets: Deferred Tax Assets, Net [Abstract] Net operating loss carryforwards Deferred Tax Assets, Operating Loss Carryforwards Deferred revenue Deferred Tax Assets, Deferred Income Other liabilities and accruals Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Accrued Liabilities Depreciable assets Deferred Tax Assets, Property, Plant and Equipment Convertible senior notes Deferred Tax Assets, Convertible Debt Instruments Deferred Tax Assets, Convertible Debt Instruments Other reserves Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Other Gross deferred tax assets Deferred Tax Assets, Gross Valuation allowance Total deferred tax assets, net of valuation allowance Deferred Tax Assets, Net of Valuation Allowance Deferred tax liability: Deferred Tax Liabilities, Net [Abstract] Goodwill Total deferred tax liability Deferred Tax Liabilities, Gross Net deferred tax assets Deferred Tax Assets, Net Capitalized computer software costs Capitalized Computer Software, Additions Schedule of stock option activity Share-based Compensation, Stock Options, Activity [Table Text Block] Schedule of RSU activity Schedule of Nonvested Restricted Stock Units Activity [Table Text Block] Schedule of stock option valuation assumptions Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] Schedule of ESPP valuation assumptions Schedule of Share-based Payment Award, Employee Stock Purchase Plan, Valuation Assumptions [Table Text Block] Schedule of stock-based compensation expense recognized in consolidated statements of operations Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table Text Block] Commitments and Contingencies Disclosure [Abstract] Loss Contingencies [Table] Loss Contingencies [Table] Lease Arrangement, Type [Axis] Lease Arrangement, Type [Axis] Lease Arrangement, Type [Domain] Lease Arrangement, Type [Domain] Operating Lease in New York Operating Lease in New York [Member] Operating Lease in New York [Member] Operating Lease in Texas Operating Lease in Texas [Member] Operating Lease in Texas [Member] Operating Lease in Australia Operating Lease in Australia [Member] Operating Lease in Australia [Member] Loss Contingencies [Line Items] Loss Contingencies [Line Items] Rentable area (in sq ft) Operating Leases, Net Rentable Area Operating Leases, Net Rentable Area Term of lease Lessee, Operating Lease, Term of Contract Base rent payments over term Operating Leases, Rent Expense, Minimum Rentals Period payments begin after delivery of premises Operating Leases, Rent Expense, Period Payments Begin After Delivery Of Premises Operating Leases, Rent Expense, Period Payments Begin After Delivery Of Premises Operating leases, rent expense Operating Leases, Rent Expense Operating lease, liability Operating Lease, Liability Letters of credit outstanding Letters of Credit Outstanding, Amount Accrual for contingencies Loss Contingency Accrual Numerator: Net Income (Loss) Available to Common Stockholders, Basic [Abstract] Net loss Denominator: Earnings Per Share, Basic and Diluted, Other Disclosures [Abstract] Weighted-average shares used to compute net loss per share, basic and diluted (in shares) Weighted Average Number of Shares Outstanding, Basic and Diluted Net loss per share, basic and diluted (in dollars per share) Earnings Per Share, Basic and Diluted Schedule of financial assets and liabilities measured at fair value on a recurring basis Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] Property, Plant and Equipment [Abstract] Property, plant and equipment Property, Plant and Equipment [Table Text Block] Depreciation and amortization, property, plant and equipment Depreciation And Amortization, Property, Plant and Equipment Depreciation And Amortization, Property, Plant and Equipment Financial and tangible assets, net Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Financial And Tangible Assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Financial And Tangible Assets Identifiable intangible assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill Deferred revenue Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Deferred Revenue Goodwill Goodwill Total purchase price Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net Schedule of Long-term Debt Instruments [Table] Schedule of Long-term Debt Instruments [Table] Debt Instrument [Axis] Debt Instrument [Axis] Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Convertible Senior Notes, Equity Component Convertible Senior Notes, Equity Component [Member] Convertible Senior Notes, Equity Component [Member] Long-term Debt, Type [Axis] Long-term Debt, Type [Axis] Long-term Debt, Type [Domain] Long-term Debt, Type [Domain] Convertible Debt Convertible Debt [Member] Debt Instrument [Line Items] Debt Instrument [Line Items] Debt discount for conversion option Debt Instrument, Convertible, Gross Amount of Equity Component Debt Instrument, Convertible, Gross Amount of Equity Component Unamortized debt issuance costs Debt Issuance Costs, Gross Net carrying amount Debt Instrument, Convertible, Carrying Amount of Equity Component Goodwill and Intangible Assets Disclosure [Abstract] Schedule of goodwill Schedule of Goodwill [Table Text Block] Gross carrying amount and accumulated amortization of intangible assets Schedule of Finite-Lived Intangible Assets [Table Text Block] Future amortization expense related to intangible assets Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block] Subsequent Events [Abstract] Subsequent Event [Table] Subsequent Event [Table] Subsequent Event Type [Axis] Subsequent Event Type [Axis] Subsequent Event Type [Domain] Subsequent Event Type [Domain] Subsequent Event Subsequent Event [Member] Other Commitments [Axis] Other Commitments [Axis] Other Commitments [Domain] Other Commitments [Domain] Enterprise Partnership Arrangement Enterprise Partnership Arrangement [Member] Enterprise Partnership Arrangement [Member] Subsequent Event [Line Items] Subsequent Event [Line Items] Other commitment Other Commitment Commitment term Other Commitment, Period Other Commitment, Period Summary of Significant Accounting Policies Significant Accounting Policies [Text Block] Goodwill impairment Goodwill, Impairment Loss Schedule of Acquired Finite-Lived Intangible Asset by Major Class [Table] Schedule of Acquired Finite-Lived Intangible Asset by Major Class [Table] Acquired Finite-Lived Intangible Assets [Line Items] Acquired Finite-Lived Intangible Assets [Line Items] Number of operating segments Number of Operating Segments New Accounting Pronouncements or Change in Accounting Principle [Table] New Accounting Pronouncements or Change in Accounting Principle [Table] Restatement [Axis] Restatement [Axis] Restatement [Domain] Restatement [Domain] As Previously Reported Previously Reported [Member] Impact of Adoption Restatement Adjustment [Member] Adjustments for Change in Accounting Principle [Axis] Adjustments for Change in Accounting Principle [Axis] Adjustments for Change in Accounting Principle [Domain] Adjustments for Change in Accounting Principle [Domain] Accounting Standards Update 2014-09 Accounting Standards Update 2014-09 [Member] Subscription License [Member] New Accounting Pronouncements or Change in Accounting Principle [Line Items] New Accounting Pronouncements or Change in Accounting Principle [Line Items] Selected Consolidated Statement of Operations Data Income Statement [Abstract] Revenues [Abstract] Revenues [Abstract] Revenues Cost of Revenue [Abstract] Cost of Revenue [Abstract] Total cost of revenue Cost of Goods and Services Sold Gross profit Gross Profit Operating Expenses [Abstract] Operating Expenses [Abstract] Sales and marketing Selling and Marketing Expense Loss from operations Operating Income (Loss) Net loss per share, basic and diluted - (in dollars per share) Selected Consolidated Balance Sheet Data Statement of Financial Position [Abstract] Assets Assets [Abstract] Deferred commissions Deferred Costs, Current Accounts receivable, net Accounts Receivable, Net, Current Other assets Other Assets, Noncurrent Liabilities and Stockholders’ Equity Liabilities and Equity [Abstract] Deferred revenue, current Contract with Customer, Liability, Current Deferred revenue, non-current Contract with Customer, Liability, Noncurrent Accumulated deficit Retained Earnings (Accumulated Deficit) Selected Consolidated Statement of Cash Flow Data Statement of Cash Flows [Abstract] Accounts receivable Increase (Decrease) in Accounts Receivable Deferred commissions Increase (Decrease) in Deferred Charges Deferred revenue Increase (Decrease) in Contract with Customer, Liability Capitalized contract cost, amortization period Capitalized Contract Cost, Amortization Period Typical payment term period Revenue From Contract With Customer, Payment Term Revenue From Contract With Customer, Payment Term Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward] Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward] Unrecognized tax benefits at beginning of year Unrecognized Tax Benefits Decreases in tax positions in prior years Unrecognized Tax Benefits, Decrease Resulting from Prior Period Tax Positions Additions based on tax positions in the current year Unrecognized Tax Benefits, Increase Resulting from Current Period Tax Positions Unrecognized tax benefits at end of year Convertible Senior Notes, Liability Component Convertible Senior Notes, Liability Component [Member] Convertible Senior Notes, Liability Component [Member] Principal Long-term Debt, Gross Unamortized debt discount Debt Instrument, Unamortized Discount Net carrying amount Long-term Debt Equity Incentive Plans Disclosure of Compensation Related Costs, Share-based Payments [Text Block] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table] 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Period Two [Member] Face amount of debt Debt Instrument, Face Amount Interest rate Debt Instrument, Interest Rate, Stated Percentage Proceeds from convertible senior notes, net of issuance costs Proceeds from Convertible Debt Convertible debt, conversion ratio Debt Instrument, Convertible, Conversion Ratio Convertible debt, conversion ratio denominator Debt Instrument, Convertible, Conversion Ratio, Denominator Debt Instrument, Convertible, Conversion Ratio, Denominator Initial conversion price (in dollars per share) Debt Instrument, Convertible, Conversion Price Threshold trading days Debt Instrument, Convertible, Threshold Trading Days Consecutive threshold trading days Debt Instrument, Convertible, Threshold Consecutive Trading Days Threshold percentage of stock price trigger Debt Instrument, Convertible, Threshold Percentage of Stock Price Trigger Trading price as a percentage of stock price and debt conversion rate Debt Instrument, Convertible, Trading Price As A Percentage Of Stock Price And Debt Conversion Rate Debt Instrument, Convertible, Trading Price As A Percentage Of Stock Price And Debt Conversion Rate Percentage of principal amount redeemed Debt Instrument, Redemption Price, Percentage of Principal Amount Redeemed Carrying amount of convertible debt equity component Debt issuance costs Effective interest rate Debt Instrument, Interest Rate, Effective Percentage Fair value of convertible debt Convertible Debt, Fair Value Disclosures Income tax benefit at statutory rate Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount State taxes, net of federal benefit Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount Impact of foreign income taxes Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential, Amount Stock based compensation Effective Income Tax Rate Reconciliation, Nondeductible Expense, Share-based Compensation Cost, Amount Non-deductible expenses Effective Income Tax Rate Reconciliation, Nondeductible Expense, Other, Amount Change in valuation allowance Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount Research and development credits Effective Income Tax Rate Reconciliation, Tax Credit, Research, Amount Prior year true ups Effective Income Tax Rate Reconciliation, Prior Year Income Taxes, Amount Change in tax rate due to the Tax Act Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount Other Effective Income Tax Rate Reconciliation, Other Adjustments, Amount Provision for (benefit from) income taxes Income Tax Expense (Benefit) Award requisite service period Share-based Compensation Arrangement by Share-based Payment Award, Award Requisite Service Period Contract assets Contract with Customer, Asset, Net, Current Restricted cash Restricted Cash Components of loss before provision for income taxes Schedule of Income before Income Tax, Domestic and Foreign [Table Text Block] Components of the provision for income taxes Schedule of Components of Income Tax Expense (Benefit) [Table Text Block] Schedule of effective income tax rate reconciliation Schedule of Effective Income Tax Rate Reconciliation [Table Text Block] Components of deferred tax assets for federal and state income taxes Schedule of Deferred Tax Assets and Liabilities [Table Text Block] Summary of activity within unrecognized gross tax benefits Schedule of Unrecognized Tax Benefits Roll Forward [Table Text Block] Reconciliation of cash, cash equivalents, and restricted cash within the consolidated balance sheets to the amounts shown in the statements of cash flows above: Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents [Abstract] Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Restricted cash, non-current Restricted Cash, Current Total cash, cash equivalents and restricted cash Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents Expected term (in years) Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term Expected volatility, minimum Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate, Minimum Expected volatility, maximum Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate, Maximum Risk-free interest rate, minimum (as a percent) Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate, Minimum Risk-free interest rate, maximum (as a percent) Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate, Maximum Dividend yield (as a percent) Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate Options granted (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross Schedule of future minimum lease payments for finance leases Schedule of Future Minimum Lease Payments for Capital Leases [Table Text Block] Schedule of future minimum rental payments for operating leases Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block] Schedule of other commitments Other Commitments [Table Text Block] Equity [Abstract] Schedule of Stock by Class [Table] Schedule of Stock by Class [Table] Class of Stock [Line Items] Class of Stock [Line Items] Number of votes per share Common Stock, Voting Rights, Number of Votes Per Share Common Stock, Voting Rights, Number of Votes Per Share Period of automatic conversion after death of founder Common Stock, Conversion Feature, Period Of Automatic Conversion After Death Of Founder Common Stock, Conversion Feature, Period Of Automatic Conversion After Death Of Founder Percent of outstanding stock Common Stock, Conversion Feature, Percent of Outstanding Stock Common Stock, Conversion Feature, Percent of Outstanding Stock Common stock authorized (in shares) Common Stock, Shares Authorized Common stock, par value (in dollars per share) Common Stock, Par or Stated Value Per Share Common stock issued (in shares) Common Stock, Shares, Issued Common stock outstanding (in shares) Common Stock, Shares, Outstanding Shares Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] Unvested - Beginning of period (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number RSUs granted (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period RSUs vested (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period RSUs forfeited and canceled (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period Unvested - End of period (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract] Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract] Unvested - Beginning of period (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value RSUs granted (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value RSUs vested (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value RSUs forfeited and canceled (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value Unvested - End of period (in dollars per share) Goodwill [Roll Forward] Goodwill [Roll Forward] Balance, beginning of the year Increase in goodwill related to business combinations Goodwill, Acquired During Period Balance, end of the year Revenue: Cost of revenue: Gross profit Operating expenses: Research and development Research and Development Expense General and administrative General and Administrative Expense Total operating expenses Operating Expenses Loss from operations Other income (expense): Other Nonoperating Income (Expense) [Abstract] Interest income Investment Income, Net Interest expense Interest Expense Other income (expense), net Other Nonoperating Income (Expense) Provision for (benefit from) income taxes Net loss Net loss per share attributable to common stockholders, basic and diluted - (in dollars per share) Weighted-average shares used to compute net loss per share attributable to common stockholders, basic and diluted for Class A and Class B (in shares) Fair Value Measurements, Recurring and Nonrecurring [Table] Fair Value Measurements, Recurring and Nonrecurring [Table] Cash and Cash Equivalents [Axis] Cash and Cash Equivalents [Axis] Cash and Cash Equivalents [Domain] Cash and Cash Equivalents [Domain] Money market funds Money Market Funds [Member] U.S. government treasury securities US Treasury Securities [Member] Financial Instrument [Axis] Financial Instrument [Axis] Financial Instruments [Domain] Financial Instruments [Domain] Measurement Frequency [Axis] Measurement Frequency [Axis] Fair Value, Measurement Frequency [Domain] Fair Value, Measurement Frequency [Domain] 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Schedule of antidilutive securities excluded from computation of earnings per share Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block] Developed technology Developed Technology Rights [Member] Domain name Internet Domain Names [Member] Amortization of intangible assets Amortization of Intangible Assets Concentration Risk [Table] Concentration Risk [Table] Concentration Risk Type [Axis] Concentration Risk Type [Axis] Concentration Risk Type [Domain] Concentration Risk Type [Domain] Geographic Concentration Risk Geographic Concentration Risk [Member] Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Domain] Concentration Risk Benchmark [Domain] Revenue from Contract with Customer Revenue from Contract with Customer [Member] United States UNITED STATES United Kingdom UNITED KINGDOM Concentration Risk [Line Items] Concentration Risk [Line Items] Disaggregation of Revenue [Abstract] 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by (Used in) Financing Activities Effect of exchange rate changes on cash, cash equivalents, and restricted cash Effect of Exchange Rate on Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents Net increase (decrease) in cash, cash equivalents, and restricted cash Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect Cash, cash equivalents, and restricted cash, beginning of year Cash, cash equivalents, and restricted cash, end of year Supplemental cash flow disclosure Additional Cash Flow Elements [Abstract] Cash paid during the period for: Supplemental Cash Flow Information [Abstract] Income taxes, net of refunds Income Taxes Paid, Net Interest expense, net Interest Paid, Excluding Capitalized Interest, Operating Activities Construction costs related to build-to-suit lease obligations Construction Costs, Build-To-Suit Lease Obligations Construction Costs, Build-To-Suit Lease Obligations 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