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Individuals All Individuals [Member] Borrowings from line of credit Proceeds from Lines of Credit PEO PEO [Member] Variable Rate [Axis] Variable Rate [Axis] Income Tax Disclosure [Abstract] Income Tax Disclosure [Abstract] Name Trading Arrangement, Individual Name Other (expense) income, net Other Nonoperating Income (Expense) Statement of Stockholders' Equity [Abstract] Statement of Stockholders' Equity [Abstract] Intangible assets, net Intangible Assets, Net (Excluding Goodwill) Property, Plant and Equipment, Type [Axis] Long-Lived Tangible Asset [Axis] Entity Public Float Entity Public Float Unrecognized stock-based compensation expense Share-Based Payment Arrangement, Nonvested Award, Excluding Option, Cost Not yet Recognized, Amount Unused capacity commitment fee percentage Line of Credit Facility, Unused Capacity, Commitment Fee Percentage Business Combination, Asset Acquisition, and Joint Venture Formation [Abstract] Awards Close in Time to MNPI Disclosures, Table Awards Close 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Location, Balance [Axis] Statement of Income Location, Balance [Axis] Cash and Cash Equivalents Cash and Cash Equivalents, Policy [Policy Text Block] Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Thereafter Finite-Lived Intangible Asset, Expected Amortization, after Year Five Debt Disclosure [Abstract] Debt Disclosure [Abstract] Impairment of long-lived assets Impairment, Long-Lived Asset, Held-for-Use Voting Common Stock Common Stock Common Stock [Member] Measure: Measure [Axis] Issuance of common stock from settlement of equity awards Shares Issued, Value, Share-Based Payment Arrangement, after Forfeiture Operating Loss Carryforwards [Table] Operating Loss Carryforwards [Table] Gross increase related to current year positions Unrecognized Tax Benefits, Increase Resulting from Current Period Tax Positions Forgone Recovery due to Expense of Enforcement, Amount Forgone Recovery due to Expense of Enforcement, Amount Other current and noncurrent assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Other Line of Credit Line of Credit [Member] Entity Emerging Growth Company Entity Emerging Growth Company Segment Reporting [Abstract] Segment Reporting [Abstract] Taxes paid related to net share settlement of equity awards (in shares) Share-Based Payment Arrangement, Shares Withheld for Tax Withholding Obligation Entity Central Index Key Entity Central Index Key General and administrative General and Administrative Expense [Member] Lessee, Lease, Description [Table] Lessee, Lease, Description [Table] Increase (Decrease) In Operating Lease, Right-Of-Use Asset Increase (Decrease) In Operating Lease, Right-Of-Use Asset Increase (Decrease) In Operating Lease, Right-Of-Use Asset Non-GAAP Measure Description Non-GAAP Measure Description [Text Block] Non-PEO NEO Average Compensation Actually Paid Amount Non-PEO NEO Average Compensation Actually Paid Amount Convertible Preferred 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State or Country Code Proceeds From Disgorgement of Stockholder Short-Swing Profits Proceeds From Disgorgement of Stockholder Short-Swing Profits Proceeds From Disgorgement of Stockholder Short-Swing Profits Class B common stock Common Class B [Member] Title Trading Arrangement, Individual Title Statement [Table] Statement [Table] Schedule of components of loss before income taxes Schedule of Income before Income Tax, Domestic and Foreign [Table Text Block] Geographic concentration risk Geographic Concentration Risk [Member] Beginning balance Ending balance Unrecognized Tax Benefits Unrecognized Tax Benefits City Area Code City Area Code Current liabilities Liabilities, Current [Abstract] Auditor Location Auditor Location Changes in operating assets and liabilities, excluding impact from business acquisition Increase (Decrease) in Operating Assets [Abstract] Cash paid for interest Interest Paid, Excluding Capitalized Interest, Operating Activities Insider Trading Policies and Procedures Not Adopted Insider Trading Policies and Procedures Not Adopted [Text Block] Business Combination, Separately Recognized Transactions [Table] Business Combination, Separately Recognized Transactions [Table] Purchases of marketable securities Payments to Acquire Short-Term Investments Level 1 Fair Value, Inputs, Level 1 [Member] Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Axis] Total current assets Assets, Current Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Supplemental cash flow information Noncash Investing and Financing Items [Abstract] Revision of Prior Period [Domain] Revision of Prior Period [Domain] Exercisable at end of the period (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Number Increase in deferred commissions Increase (Decrease) In Contract With Customer, Asset, Net Increase (Decrease) In Contract With Customer, Asset, Net Document Information [Line Items] 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Consolidation and Presentation of Financial Statements Disclosure and Significant Accounting Policies [Text Block] 2028 Lessee, Operating Lease, Liability, to be Paid, Year Four Earnings Per Share [Abstract] Earnings Per Share [Abstract] Equity [Abstract] Equity [Abstract] Accumulated deficit Retained Earnings (Accumulated Deficit) Class of Stock [Domain] Class of Stock [Domain] Revenue from contract with customer benchmark Revenue from Contract with Customer Benchmark [Member] Income Tax Reconciliation, Change in State Tax Rate, Amount Income Tax Reconciliation, Change in State Tax Rate, Amount Income Tax Reconciliation, Change in State Tax Rate, Amount Related Party Transaction [Line Items] Related Party Transaction [Line Items] General and administrative General and Administrative Expense 2016 Stock Plan 2016 Stock Plan [Member] 2016 Plan [Member] Schedule of Recognized Identified Assets Acquired and Liabilities Assumed Schedule Of Identified Assets Acquired And Liabilities Assumed [Table] Schedule Of Identified Assets Acquired And Liabilities Assumed Organization, Consolidation and Presentation of Financial Statements [Abstract] Organization, Consolidation and Presentation of Financial Statements [Abstract] Aggregate Available Trading Arrangement, Securities Aggregate Available Amount Equity Awards Adjustments Equity Awards Adjustments [Member] Exercise Price Range [Axis] Exercise Price Range [Axis] Weighted-average discount rate Operating Lease, Weighted Average Discount Rate, Percent Total operating lease liabilities Operating lease liability Operating Lease, Liability Net cash provided by (used in) financing activities Net Cash Provided by (Used in) Financing Activities Underlying Securities Award Underlying Securities Amount Operating Loss Carryforwards [Line Items] Operating Loss Carryforwards [Line Items] Credit Facility [Axis] Credit Facility [Axis] Amendment Flag Amendment Flag Entity Registrant Name Entity Registrant Name Accounts receivable Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables Adjustment to Non-PEO NEO Compensation Footnote Adjustment to Non-PEO NEO Compensation Footnote [Text Block] Stock Appreciation Rights (SARs) Stock Appreciation Rights (SARs) [Member] Gain on lease modification Gain on lease modification Gain on lease modification Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table] Gross profit Gross Profit Intangible Assets Intangible Assets Disclosure [Text Block] Deferred State and Local Income Tax Expense (Benefit) Deferred State and Local Income Tax Expense (Benefit) Fair Value as of Grant Date Award Grant Date Fair Value Foreign tax Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential, Amount Level 2 Fair Value, Inputs, Level 2 [Member] Shares issued and sold in offering (in shares) Sale of Stock, Number of Shares Issued in Transaction Revolving Line of Credit Debt Disclosure [Text Block] Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] Geographical [Domain] Geographical [Domain] Amortization of deferred commissions Capitalized Contract Cost, Amortization Recovery of Erroneously Awarded Compensation Disclosure [Line Items] Acquired Technology Technology-Based Intangible Assets [Member] Entity Address, Postal Zip Code Entity Address, Postal Zip Code Advertising costs Advertising Expense Schedule of Stock-Based Compensation Expense Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block] Principles of Consolidation Consolidation, Policy [Policy Text Block] Restatement Determination Date: Restatement Determination Date [Axis] Title of 12(b) Security Title of 12(b) Security Concentration Risk Type [Axis] Concentration Risk Type [Axis] NonCashAdjustmentToOperatingLeaseRightOfUseAssetsFromLeaseModification NonCashAdjustmentToOperatingLeaseRightOfUseAssetsFromLeaseModification NonCashAdjustmentToOperatingLeaseRightOfUseAssetsFromLeaseModification Common stock Common Stock, Value, Issued Document Financial Statement Error Correction [Flag] Document Financial Statement Error Correction [Flag] Period from closing of initial public offering (in years) Common Stock, Conversion Feature, Period From Closing Of Initial Public Offering Common Stock, Conversion Feature, Period From Closing Of Initial Public Offering Contract with Customer, Liability, Increase (Decrease) for Contract Acquired in Business Combination Contract with Customer, Liability, Increase (Decrease) for Contract Acquired in Business Combination Share-based Payment Arrangement [Abstract] Share-Based Payment Arrangement [Abstract] Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value State income tax, net of federal tax benefit Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Percent Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested [Member] Lease Arrangement Axis [Axis] Lease Arrangement Axis [Axis] Lease Arrangement Axis Auditor Name Auditor Name Other Deferred Tax Assets, Other Finite-Lived Intangible Assets [Line Items] Finite-Lived Intangible Assets [Line Items] Forfeited Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value Cash flows from financing activities Net Cash Provided by (Used in) Financing Activities [Abstract] Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested [Member] Revolving credit facility Long-Term Line of Credit, Noncurrent State income tax, net of federal tax benefit Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount Useful life Property, Plant and Equipment, Useful Life Number of Options Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding [Roll Forward] Research & Development Credits Deferred Tax Assets, Research & Development Credits Deferred Tax Assets, Research & Development Credits Total deferred tax liabilities Deferred Tax Liabilities, Gross Proceeds from employee stock purchase plan Proceeds from Stock Plans Payments related to operating leases Operating Lease, Payments Cash and cash equivalents acquired Cash Acquired from Acquisition Adjustment To PEO Compensation, Footnote Adjustment To PEO Compensation, Footnote [Text Block] Award Timing MNPI Disclosure Award Timing MNPI Disclosure [Text Block] Maximum exercise period (in years) Share-Based Compensation Arrangement by Share-Based Payment Award, Expiration Period Return to provision Effective Income Tax Rate Reconciliation, Return On Provision, Percent Effective Income Tax Rate Reconciliation, Return On Provision, Percent Trademark Trademarks [Member] Capital expenditures incurred but not yet paid Capital Expenditures Incurred but Not yet Paid Aggregate Pension Adjustments Service Cost Aggregate Pension Adjustments Service Cost [Member] Property and Equipment Property, Plant and Equipment, Policy [Policy Text Block] Compensation Actually Paid vs. Other Measure Compensation Actually Paid vs. Other Measure [Text Block] Stock, Class of Stock [Table] Stock, Class of Stock [Table] Deferred Tax Liabilities, Intangible Assets Deferred Tax Liabilities, Intangible Assets Total current liabilities Liabilities, Current Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year [Member] Total assets Assets Concentration of Credit Risk Concentration Risk, Credit Risk, Policy [Policy Text Block] 2025 Finite-Lived Intangible Asset, Expected Amortization, Year One Total cost of revenue Cost of Goods and Services Sold Advertising Costs Advertising Cost [Policy Text Block] Grants in period (in shares) Granted Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period Schedule of Acquired Finite-Lived Intangible Assets by Major Class Schedule of Acquired Finite-Lived Intangible Assets by Major Class [Table Text Block] Expenditures for property and equipment Payments to Acquire Property, Plant, and Equipment Over-allotment option Over-Allotment Option [Member] Deferred revenue Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Deferred Revenue Other noncurrent liabilities Other Liabilities, Noncurrent Forgone Recovery due to Violation of Home Country Law, Amount Forgone Recovery due to Violation of Home Country Law, Amount Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] Commitments and contingencies (Note 11) Commitments and Contingencies Share-Based Compensation Share-Based Payment Arrangement [Policy Text Block] Business Combinations Policy Business Combinations Policy [Policy Text Block] Schedule of effective income tax rate reconciliation Schedule of Effective Income Tax Rate Reconciliation [Table Text Block] Termination Date Trading Arrangement Termination Date Selling Shareholders Selling Shareholders [Member] Selling Shareholders Related Party Transaction [Table] Related Party Transaction [Table] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] 2026 Lessee, Operating Lease, Liability, to be Paid, Year Two 2028 Purchase Obligation, to be Paid, Year Four Incentive Stock Plan Share-Based Payment Arrangement [Text Block] Schedule of revenue by geographical region Revenue from External Customers by Geographic Areas [Table Text Block] Entity Address, City or Town Entity Address, City or Town Schedule of Recognized Identified Assets Acquired and Liabilities Assumed Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block] Leases Lessee, Leases [Policy Text Block] Schedule of Stock Option Activity Share-Based Payment Arrangement, Option, Activity [Table Text Block] Intrinsic value of options exercised Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period, Intrinsic Value Deferred sales impairment loss Deferred Sales Inducement Cost, Impairment Loss Total stock-based compensation expense Share-Based Payment Arrangement, Expense Net loss Net loss Net loss attributable to common shareholders Net Income (Loss) Attributable to Parent Trading Arrangement: Trading Arrangement [Axis] 2019 Incentive Award Plan 2019 Incentive Award Plan [Member] 2019 Incentive Award Plan [Member] Granted at fair value (in dollars per share) Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Grants in Period, Weighted Average Exercise Price Pay vs Performance Disclosure, Table Pay vs Performance [Table Text Block] Forfeited Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeited in Period Business Acquisition [Axis] Business Acquisition [Axis] Schedule of finite-lived intangible assets Schedule of Finite-Lived Intangible Assets [Table Text Block] Equity Awards Adjustments, Excluding Value Reported in Compensation Table Equity Awards Adjustments, Excluding Value Reported in the Compensation Table [Member] Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year Dividends or Other Earnings Paid on Equity Awards not Otherwise 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