Income Statement [Abstract] Statement [Table] Statement [Table] Income Statement Location [Axis] Income Statement Location [Axis] Income Statement Location [Domain] Income Statement Location [Domain] Cost of revenue Cost of Sales [Member] Research and development Research and Development Expense [Member] Sales and marketing Selling and Marketing Expense [Member] General and administrative General and Administrative Expense [Member] Statement [Line Items] Statement [Line Items] Allocated share-based compensation expense Allocated Share-based Compensation Expense Donation of common stock to charitable foundation Noncash Contribution Expense Cash contributions to charitable foundation Cash Contributions To Charitable Foundation Cash Contributions To Charitable Foundation Related Party Transactions [Abstract] Schedule of Related Party Transactions, by Related Party [Table] Schedule of Related Party Transactions, by Related Party [Table] Related Party [Axis] Related Party [Axis] Related Party [Domain] Related Party [Domain] Controlling Shareholders Majority Shareholder [Member] Affiliated Entity Affiliated Entity [Member] Related Party Transaction [Axis] Related Party Transaction [Axis] Related Party Transaction [Domain] Related Party Transaction [Domain] Dropbox Charitable Foundation Dropbox Charitable Foundation [Member] Dropbox Charitable Foundation [Member] Infrastructure Equipment Under Capital Leases and Commercial Products and Services Infrastructure Equipment Under Capital Leases And Commercial Products And Services [Member] Infrastructure Equipment Under Capital Leases And Commercial Products And Services [Member] Related Party Transaction [Line Items] Related Party Transaction [Line Items] Number of controlling shareholders in related party transaction Related Party Transaction, Number Of Controlling Shareholders Related Party Transaction, Number Of Controlling Shareholders Payments to related party Related Party Transaction, Amounts of Transaction General and administrative expense from donated shares Related Party Transaction, Selling, General and Administrative Expenses from Transactions with Related Party Payables and Accruals [Abstract] Non-income taxes payable Accrual for Taxes Other than Income Taxes, Current Deferred rent Accrued Rent, Current Accrued legal and other external fees Accrued Professional Fees, Current Financing obligations, current Financing Obligations, Current Financing Obligations, Current Accrued infrastructure costs Accrued Infrastructure Costs, Current Accrued Infrastructure Costs, Current Accrued property and equipment purchases Accrued Property, Plant And Equipment, Current Accrued Property, Plant And Equipment, Current Income taxes payable Accrued Income Taxes, Current Other accrued and current liabilities Other Accrued Liabilities and Other Liabilities, Current Other Accrued Liabilities and Other Liabilities, Current Total accrued and other current liabilities Accrued Liabilities and Other Liabilities, 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Instrument [Axis] Financial Instruments [Domain] Financial Instruments [Domain] Corporate notes and obligations Corporate Debt Securities [Member] U.S. Treasury securities US Treasury Securities [Member] U.S. agency obligations US Government Corporations and Agencies Securities [Member] Cash and Cash Equivalents [Line Items] Cash and Cash Equivalents [Line Items] Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Total cash equivalents Cash and Cash Equivalents, Fair Value Disclosure Short-term investments, amortized cost Available-for-sale Debt Securities, Amortized Cost Basis Short-term investments, unrealized gain Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax Short-term investments, unrealized loss Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax Short-term investments, estimated fair value Available-for-sale Securities, Debt Securities Total cash, cash equivalents, and short term investments, before unrealized gains (losses) on investments Cash, Cash Equivalents, And Short Term Investments, Amortized Cost Cash, Cash Equivalents, And Short Term Investments, Amortized Cost Total cash, cash equivalents, and short term investments Cash, Cash Equivalents, and Short-term Investments Fair Value Disclosures [Abstract] Schedule of Fair Value Assets Measured On Recurring Basis Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] Organization, Consolidation and Presentation of Financial Statements [Abstract] Description of the Business and Summary of Significant Accounting Policies Organization, Consolidation and Presentation of Financial Statements Disclosure and Significant Accounting Policies [Text Block] Commitments and Contingencies Disclosure [Abstract] Loss Contingencies [Table] Loss Contingencies [Table] Loss Contingency Nature [Axis] Loss Contingency Nature [Axis] Loss Contingency, Nature [Domain] Loss Contingency, Nature [Domain] Letter of credit Financial Standby Letter of Credit [Member] Loss Contingencies [Line Items] Loss Contingencies [Line Items] Gross rent expense Operating Leases, Rent Expense Sublease income Sublease Income Operating lease, minimum obligation Operating Lease, Minimum Obligations Operating Lease, Minimum Obligations Tenant improvement reimbursements Tenant Improvements Letter of credit supporting obligations Loss Contingency, Estimate of Possible Loss Operating leases, future minimum payments no longer obligated to pay Operating Leases, Future Minimum Payments, No Longer Obligated To Pay Operating Leases, Future Minimum Payments, No Longer Obligated To Pay Document and Entity Information [Abstract] Document and Entity Information [Abstract] Document Information [Table] Document Information [Table] Class of Stock [Axis] Class of Stock [Axis] Class of Stock [Domain] Class of Stock [Domain] Class A common stock Common Class A [Member] Class B common stock Common Class B [Member] Class C common stock Common Class C [Member] Document Information [Line Items] Document Information [Line Items] 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 Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Earnings Per Share [Abstract] Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Antidilutive Securities [Axis] Antidilutive Securities [Axis] Antidilutive Securities, Name [Domain] Antidilutive Securities, Name [Domain] Convertible preferred stock Convertible Preferred Stock [Member] Restricted stock units Restricted Stock Units (RSUs) [Member] Options to purchase shares of common stock Employee Stock Option [Member] Co-Founder Grants Co-Founder Grants [Member] Co-Founder Grants [Member] Shares subject to repurchase from early-exercised options and unvested restricted stock Shares Subject To Repurchase [Member] Shares Subject To Repurchase [Member] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Antidilutive securities excluded from computation of earnings per share (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Schedule of Cash, Cash Equivalents and Short-Term Investments Cash, Cash Equivalents and Investments [Table Text Block] Contractual Maturities of Short Term Investments Investments Classified by Contractual Maturity Date [Table 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] Change in foreign currency translation adjustments Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Portion Attributable to Parent Change in net unrealized losses on short-term investments Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax, Portion Attributable to Parent Total other comprehensive income (loss), net of tax Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent Comprehensive loss Comprehensive Income (Loss), Net of Tax, Attributable to Parent Conversion of Stock [Table] Conversion of Stock [Table] Sale of Stock [Axis] Sale of Stock [Axis] Sale of Stock [Domain] Sale of Stock [Domain] Private Placement Private Placement [Member] Underwriters Over-allotment Option Over-Allotment Option [Member] Stock Conversion Description [Axis] Stock Conversion Description [Axis] Conversion of Stock, Name [Domain] Conversion of Stock, Name [Domain] Conversion of Convertible Preferred Stock to Class B Common Stock Conversion Of Convertible Preferred Stock To Class B Common Stock [Member] Conversion Of Convertible Preferred Stock To Class B Common Stock [Member] Conversion of Convertible Preferred Stock to Class A Common Stock Conversion Of Convertible Preferred Stock To Class A Common Stock [Member] Conversion Of Convertible Preferred Stock To Class A Common Stock [Member] Conversion of Class B Common Stock to Class A Common Stock Conversion Of Class B Common Stock To Class A Common Stock [Member] Conversion Of Class B Common Stock To Class A Common Stock [Member] Range [Axis] Range [Axis] Range [Domain] Range [Domain] Minimum Minimum [Member] Maximum Maximum [Member] Award Type [Axis] Award Type [Axis] Equity Award [Domain] Equity Award [Domain] Two-Tier RSUs Two-Tier Restricted Stock Units (RSUs) [Member] Two-Tier Restricted Stock Units (RSUs) [Member] Restricted Stock Units (RSUs) One-Tier RSU One-Tier Restricted Stock Units (RSUs) [Member] One-Tier Restricted Stock Units (RSUs) [Member] Restricted Stock Restricted Stock [Member] Plan Name [Axis] Plan Name [Axis] Plan Name [Domain] Plan Name [Domain] Title of Individual [Axis] Title of Individual [Axis] Relationship to Entity [Domain] Relationship to Entity [Domain] Chief Executive Officer Chief Executive Officer [Member] Director Director [Member] Vesting [Axis] Vesting [Axis] Vesting [Domain] Vesting [Domain] Tranche One Share-based Compensation Award, Tranche One [Member] Concentration Risk Type [Axis] Concentration Risk Type [Axis] Concentration Risk Type [Domain] Concentration Risk Type [Domain] Customer Concentration Risk Customer Concentration Risk [Member] Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Domain] Concentration Risk Benchmark [Domain] Trade and Other Receivables Accounts Receivable And Other Receivable [Member] Accounts Receivable And Other Receivable [Member] Customer [Axis] Customer [Axis] Customer [Domain] Customer [Domain] Customer A Customer A [Member] Customer A [Member] Customer B Customer B [Member] Customer B [Member] Capitalized Contract Cost [Axis] Capitalized Contract Cost [Axis] Capitalized Contract Cost [Domain] Capitalized Contract Cost [Domain] Deferred Commissions Deferred Commissions [Member] Deferred Commissions [Member] Balance Sheet Location [Axis] Balance Sheet Location [Axis] Balance Sheet Location [Domain] Balance Sheet Location [Domain] Prepaid Expenses and Other Current Assets Prepaid Expenses and Other Current Assets [Member] Other Assets Other Noncurrent Assets [Member] Property, Plant and Equipment, Type [Axis] Property, Plant and Equipment, Type [Axis] Property, Plant and Equipment, Type [Domain] Property, Plant and Equipment, Type [Domain] Infrastructure Equipment Infrastructure Equipment [Member] Infrastructure Equipment [Member] Change in Accounting Estimate by Type [Axis] Change in Accounting Estimate by Type [Axis] Change in Accounting Estimate, Type [Domain] Change in Accounting Estimate, Type [Domain] Change in Accounting Method Accounted for as Change in Estimate Change in Accounting Method Accounted for as Change in Estimate [Member] Conversion of Stock [Line Items] Conversion of Stock [Line Items] Stock issued in IPO (in shares) Stock Issued During Period, Shares, New Issues Share price of stock issued in IPO (in dollars per share) Shares Issued, Price Per Share Proceeds from initial public offering and private placement Proceeds from Issuance Initial Public Offering Offering costs Payments of Stock Issuance Costs Shares converted in conversion (in shares) Conversion of Stock, Shares Converted Shares issued in conversion (in shares) Conversion of Stock, Shares Issued Sale of stock (in shares) Sale of Stock, Number of Shares Issued in Transaction Share price of stock sold in shares (in dollars per share) Sale of Stock, Price Per Share Proceeds received in sale of stock Sale of Stock, Consideration Received on Transaction Recognized cumulative unrecognized stock-based compensation Share-based Compensation Arrangement by Share-based Payment Award Accelerated Compensation Cost Remaining unamortized stock-based compensation Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized Unamortized stock-based compensation, requisite service period Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition Shares released (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Accelerated Vesting, Number Employer related payroll expense Labor and Related Expense Reverse stock split ratio Stockholders' Equity Note, Stock Split, Conversion Ratio Net foreign currency transaction gain (loss) Foreign Currency Transaction Gain (Loss), before Tax Revenue recognized Contract with Customer, Liability, Revenue Recognized Number of award types Share-Based Compensation Arrangement By Share-Based Payment Award, Number Of Award Types Share-Based Compensation Arrangement By Share-Based Payment Award, Number Of Award Types Vesting period Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period Shares granted (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period Number of tranches Share-Based Compensation Arrangement By Share-Based Payment Award, Number Of Tranches Share-Based Compensation Arrangement By Share-Based Payment Award, Number Of Tranches Shares 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 Award requisite period Share-based Compensation Arrangement by Share-based Payment Award, Award Requisite Service Period Concentration risk, percentage Concentration Risk, Percentage Non-trade receivables Nontrade Receivables, Current Additional contract costs deferred Capitalized Contract Costs, Additions Capitalized Contract Costs, Additions Deferred contract costs Capitalized Contract Cost, Net Deferred contract costs, amortization period Capitalized Contract Cost, Amortization Period Capitalized Contract Cost, Amortization Period Amortization of deferred commissions Amortization of Deferred Sales Commissions Impairment loss related to deferred costs Capitalized Contract Cost, Impairment Loss Property and equipment, useful life Property, Plant and Equipment, Useful Life Reduction in depreciation expense Depreciation Tenant improvement allowance receivable related to the new corporate headquarters included in prepaid expenses and other current assets and other assets Non-trade Receivable, Allowance, Current Non-trade Receivable, Allowance, Current Lease incentive obligation Lease Incentive Obligation Lease Incentive Obligation Debt Disclosure [Abstract] Revolving Credit Facility Debt Disclosure [Text Block] Remaining performance obligation Revenue, Remaining Performance Obligation Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] Performance obligation satisfaction period Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period Property, Plant and Equipment [Table] Property, Plant and Equipment [Table] Buildings Building [Member] Datacenter and other computer equipment Computer Equipment [Member] Office equipment and other Office Equipment [Member] Property, Plant and Equipment [Line Items] Property, Plant and Equipment [Line Items] Revenue Cost of revenue Cost of Revenue Gross profit Gross Profit Operating expenses Operating Expenses [Abstract] Research and development Research and Development Expense Sales and marketing Selling and Marketing Expense General and administrative General and Administrative Expense Total operating expenses Operating Expenses Loss from operations Operating Income (Loss) Interest income (expense), net Interest Income (Expense), Nonoperating, Net Other income, net Other Nonoperating Income (Expense) Loss before income taxes Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Provision for income taxes Income Tax Expense (Benefit) Net loss Net loss per share attributable to common stockholders, basic and diluted (in dollars per share) Earnings Per Share, Basic and Diluted Weighted-average shares used in computing net loss per share attributable to common stockholders, basic and diluted (in shares) Weighted Average Number of Shares Outstanding, Basic and Diluted Amortized Cost Available-for-sale Securities, Debt Maturities, Single Maturity Date, Amortized Cost Basis [Abstract] Due within one year Available-for-sale Securities, Debt Maturities, Next Twelve Months, Amortized Cost Basis Due between one to three years Available For Sale Securities, Debt Maturities After One Through Four Years, Amortized Cost Available For Sale Securities, Debt Maturities After One Through Four Years, Amortized Cost Total Available-for-sale Securities, Debt Maturities, Single Maturity Date, Amortized Cost Basis Estimated Fair Value Available-for-sale Securities, Debt Maturities, Single Maturity Date [Abstract] Due within one year Available-for-sale Securities, Debt Maturities, Next Twelve Months, Fair Value Due between one to three years Available For Sale Securities, Debt Maturities After One Through Four Years, Fair Value Available For Sale Securities, Debt Maturities After One Through Four Years, Fair Value Total Available-for-sale Securities, Debt Maturities, Single Maturity Date Stockholders' Equity Note [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] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Number of shares available for issuance under the Plans Share-based Compensation Arrangement By Share-based Payment Award, Shares Available For Issuance [Roll Forward] Share-based Compensation Arrangement By Share-based Payment Award, Shares Available For Issuance [Roll Forward] Beginning balance (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized Reserved for issuance under the 2018 Plan (in shares) Common Stock, Capital Shares Reserved for Future Issuance Additional shares authorized (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Number of Additional Shares Authorized Options and RSUs canceled (in shares) Share-based Compensation Arrangement By Share-based Payment Award, Shares Canceled Share-based Compensation Arrangement By Share-based Payment Award, Shares Canceled Shares repurchased for tax withholdings on release of restricted stock (unaudited) (in shares) Shares Paid for Tax Withholding for Share Based Compensation Restricted stock granted (in shares) Share-Based Compensation Arrangement By Share-based Payment Award, Decrease In Number of Shares Authorized From Stock Granted Share-Based Compensation Arrangement By Share-based Payment Award, Decrease In Number of Shares Authorized From Stock Granted Ending balance (in shares) Options Outstanding, Number of shares outstanding under the Plans Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] Beginning balance (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number Options exercised (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period Ending balance (in shares) Vested during period (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested, Number of Shares Unvested at end of period (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Number of Shares Options Outstanding, Weighted- average exercise price per share Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract] Beginning balance (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price Options exercised (in dollars per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price Ending balance (in dollars per share) Vested during period (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested, Weighted Average Grant Date Fair Value Unvested at end of period (in dollars per shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Weighted Average Grant Date Fair Value Options Outstanding, Weighted- average remaining contractual term (In years) Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract] Weighted-average contractual term Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term Vested during period Share-based Compensation Arrangement By Share-based Payment Award, Options, Vested, Weighted Average Remaining Contractual Term Share-based Compensation Arrangement By Share-based Payment Award, Options, Vested, Weighted Average Remaining Contractual Term Restricted Stock Outstanding, Number of Plan shares outstanding Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] Beginning balance (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number RSUs released (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period RSUs canceled (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period Restricted stock granted (in shares) Ending balance (in shares) Unvested at end of period (in shares) Restricted Stock Outstanding, Weighted- average grant date fair value per share Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract] Beginning balance (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 released (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 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 Restricted stock granted (in dollars per share) Ending balance (in dollars per share) Unvested at end of period (in dollars per share) Schedule Of Accrued And Other Current Liabilities Schedule Of Accrued Liabilities And Other Current Liabilities [Table Text Block] Schedule Of Accrued Liabilities And Other Current Liabilities Fair Value, by Balance Sheet Grouping [Table] Fair Value, by Balance Sheet Grouping [Table] Measurement Frequency [Axis] Measurement Frequency [Axis] Fair Value, Measurement Frequency [Domain] Fair Value, Measurement Frequency [Domain] Fair Value, Measurements, Recurring Fair Value, Measurements, Recurring [Member] Fair Value, Hierarchy [Axis] Fair Value, Hierarchy [Axis] Fair Value Hierarchy [Domain] Fair Value Hierarchy [Domain] Level 1 Fair Value, Inputs, Level 1 [Member] Level 2 Fair Value, Inputs, Level 2 [Member] Level 3 Fair Value, Inputs, Level 3 [Member] Cash equivalents Cash Equivalents [Member] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Total short-term investments Total cash equivalents and short-term investments Cash Equivalents, and Short-term Investments Cash Equivalents, and Short-term Investments Statement of Cash Flows [Abstract] Cash flow from operating activities Net Cash Provided by (Used in) Operating Activities [Abstract] Adjustments to reconcile net loss to net cash provided by operating activities: Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Depreciation and amortization Deprecation, Depletion And Amortization (Excluding Amortization Of Deferred Sales Commissions Deprecation, Depletion And Amortization (Excluding Amortization Of Deferred Sales Commissions Stock-based compensation Share-based Compensation Other Other Noncash Income (Expense) Changes in operating assets and liabilities: Increase (Decrease) in Operating Capital [Abstract] Trade and other receivables, net Increase (Decrease) in Accounts and Other Receivables Prepaid expenses and other current assets Increase (Decrease) in Prepaid Expense and Other Assets Other assets Increase (Decrease) in Other Operating Assets Accounts payable Increase (Decrease) in Accounts Payable Accrued and other current liabilities Increase (Decrease) In Accrued Liabilities and Other Liabilities Increase (Decrease) In Accrued Liabilities and Other Liabilities Accrued compensation and benefits Increase (Decrease) in Employee Related Liabilities Deferred revenue Increase (Decrease) in Deferred Revenue Non-current liabilities Increase (Decrease) in Other Noncurrent Liabilities Net cash provided by operating activities Net Cash Provided by (Used in) Operating Activities Cash flow from investing activities Net Cash Provided by (Used in) Investing Activities [Abstract] Capital expenditures Payments to Acquire Property, Plant, and Equipment Purchases of intangible assets Payments to Acquire Intangible Assets Cash received from equipment rebates Proceeds From Equipment Rebates Proceeds From Equipment Rebates Purchases of short-term investments Payments to Acquire Available-for-sale Securities, Debt Proceeds from maturities of short-term investments Proceeds from Sale of Short-term Investments Proceeds from sales of short-term investments Proceeds from Maturities, Prepayments and Calls of Short-term Investments Net cash used in investing activities Net Cash Provided by (Used in) Investing Activities Cash flow from financing activities Net Cash Provided by (Used in) Financing Activities [Abstract] Proceeds from initial public offering and private placement, net of underwriters' discounts and commissions Payments of deferred offering costs Shares repurchased for tax withholdings on release of restricted stock Payments Related to Tax Withholding for Share-based Compensation Principal payments against capital lease obligations Repayments of Long-term Capital Lease Obligations Other Proceeds from (Payments for) Other Financing Activities Net cash provided by (used in) financing activities Net Cash Provided by (Used in) Financing Activities Effect of exchange rate changes on cash and cash equivalents Effect of Exchange Rate on Cash and Cash Equivalents Change in cash and cash equivalents Cash and Cash Equivalents, Period Increase (Decrease) Cash and cash equivalents—beginning of period Cash and cash equivalents—end of period Supplemental cash flow data: Supplemental Cash Flow Information [Abstract] Property and equipment acquired under capital leases Capital Lease Obligations Incurred Line of Credit Facility [Table] Line of Credit Facility [Table] Debt Instrument [Axis] Debt Instrument [Axis] Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Credit And Guarantee Agreement Credit And Guarantee Agreement [Member] Credit And Guarantee Agreement [Member] Long-term Debt, Type [Axis] Long-term Debt, Type [Axis] Long-term Debt, Type [Domain] Long-term Debt, Type [Domain] Line of Credit Line of Credit [Member] Credit Facility [Axis] Credit Facility [Axis] Credit Facility [Domain] Credit Facility [Domain] Revolving Credit Facility Revolving Credit Facility [Member] Letter of Credit Letter of Credit [Member] Variable Rate [Axis] Variable Rate [Axis] Variable Rate [Domain] Variable Rate [Domain] LIBOR London Interbank Offered Rate (LIBOR) [Member] Base Rate Base Rate [Member] Line of Credit Facility [Line Items] Line of Credit Facility [Line Items] Line of credit facility, maximum borrowing capacity Line of Credit Facility, Maximum Borrowing Capacity Debt issuance fees Debt Issuance Costs, Line of Credit Arrangements, Gross Debt instrument, term Debt Instrument, Term Line of credit facility, accordion feature, increase limit Line Of Credit Facility, Accordion Feature, Increase Limit Line of Credit Facility, Accordion Feature, Increase Limit Unused capacity, commitment fee percentage Line of Credit Facility, Unused Capacity, Commitment Fee Percentage Commitment fee percentage Line of Credit Facility, Commitment Fee Percentage Fronting fee Line Of Credit 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Commitment, Due in Fourth Year 2022 Other Commitment, Due in Fifth Year Thereafter Other Commitment, Due after Fifth Year Future minimum payments Other Commitment Rent payments from sub-tenants Operating Leases, Future Minimum Payments Due, Future Minimum Sublease Rentals 2018 Plan 2018 Plan [Member] 2018 Plan [Member] Employee Stock Option Expiration period Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period Options granted (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross Number of shares reserved for future issuance (in shares) Shares issued and outstanding (in shares) Shares available for grant (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant Schedule of Estimated Useful Lives of Property and Equipment Property, Plant and Equipment [Table Text Block] Building Datacenter and other computer equipment Furniture and fixtures Furniture and Fixtures [Member] Leasehold improvements Leasehold Improvements [Member] Construction in process Construction in Progress [Member] Total property and equipment Property, Plant and Equipment, Gross Accumulated depreciation and amortization Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Property and equipment, net Stockholders' Equity Shareholders' Equity and Share-based Payments [Text Block] Net Loss Per Share Earnings Per Share [Text Block] Schedule of Property and Equipment, Net Goodwill and Intangible Assets Disclosure [Abstract] Goodwill impairment Goodwill, Impaired, Accumulated Impairment Loss Income Tax Disclosure [Abstract] Income Taxes Income Tax Disclosure [Text Block] Geographic Areas Segment Reporting Disclosure [Text Block] Schedule of Earnings Per Share, Basic and Diluted Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Schedule of Potentially Dilutive Securities Excluded from Computation of Earnings 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