Private Placement Private Placement [Member] Valuation allowance Deferred Tax Assets, Valuation Allowance Series A Preferred Stock Series A Preferred Stock [Member] Title of Individual Title of Individual [Axis] Fair Value, Inputs, Level 3 Fair Value, Inputs, Level 3 [Member] Tax Credit Carryforward [Line Items] Tax Credit Carryforward [Line Items] Maturities of marketable securities Proceeds from Sale and Maturity of Debt Securities, Available-for-sale Leases Lessee, Leases [Policy Text Block] Write-offs or Deductions SEC Schedule, 12-09, Valuation Allowances and Reserves, Deduction Stock-based compensation expense APIC, Share-based Payment Arrangement, Increase for Cost Recognition Foreign Currency Foreign Currency Transactions and Translations Policy [Policy Text Block] Revenue recognized included in deferred revenue Contract with Customer, Liability, Revenue Recognized Total current liabilities Liabilities, Current Unrecognized tax benefits Beginning Balance Ending Balance Unrecognized Tax Benefits Property, Plant and Equipment, Type Property, Plant and Equipment, Type [Axis] Foreign Income (Loss) from Continuing Operations before Income Taxes, Foreign Other comprehensive income (loss): Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent [Abstract] Increase (decrease) of valuation allowance Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount Granted (in units) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period Recent Accounting Pronouncements Not Yet Adopted and Recently Adopted Accounting Pronouncements New Accounting Pronouncements, Policy [Policy Text Block] Cost of revenue Cost of Goods and Services Sold Vested (in units) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period Loans to employees Payments For Loans To Employees Payments For Loans To Employees Current Fiscal Year End Date Current Fiscal Year End Date Proceeds from initial public offering and private placement, net of underwriting discounts and commissions and other offering costs Proceeds from Issuance of Common Stock Billing Status, Type Billing Status, Type [Axis] Diluted (in shares) Weighted-average shares used in computing net income (loss) per share attributable to common stockholders, diluted (in shares) Weighted Average Number of Shares Outstanding, Diluted Deferred offering costs, reclassified to stockholders' equity Adjustments to Additional Paid in Capital, Stock Issued, Issuance Costs Summary of Marketable Securities Debt Securities, Available-for-sale [Table Text Block] Stock options outstanding (in shares) Beginning balance (in shares) Ending balance (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number Issuance of common stock upon initial public offering and private placement, net of underwriting discounts and commissions and other offering costs Stock Issued During Period, Value, New Issues Quarterly Financial Information Quarterly Financial Information [Table Text Block] Property and equipment, net Property and equipment, net Property, Plant and Equipment, Net 2021 Operating Leases, Future Minimum Payments, Due in Two Years Accumulated Other Comprehensive (Loss) Income AOCI Attributable to Parent [Member] Total assets Assets Other Effective Income Tax Rate Reconciliation, Other Adjustments, Amount Exercised (in dollars per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price Number of additional shares authorized under the plan (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized, New Shares Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized, New Shares Entity Shell Company Entity Shell Company Operating lease, total liabilities Total operating lease liabilities Operating Lease, Liability Cover page. Weighted-average remaining contractual life, vested and exercisable Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term Document Type Document Type Gross Unrealized Losses Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax Subsequent Event Subsequent Event [Member] Non-cash operating lease cost Noncash Operating Lease Cost Noncash Operating Lease Cost Schedule of Future Minimum Payments Related to Operating Leases Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block] Convertible preferred stock, shares issued (in shares) Temporary Equity, Shares Issued Accruals and reserves Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals Property, plant and equipment, additions Property, Plant and Equipment, Additions General and administrative General and Administrative Expense [Member] Accounts receivable Increase (Decrease) in Accounts Receivable 2024 Lessee, Operating Lease, Liability, Payments, Due Year Four Current liabilities: Liabilities, Current [Abstract] Operating lease right-of-use assets recognized in exchange for new operating lease obligations Right-of-Use Asset Obtained in Exchange for Operating Lease Liability Operating lease liabilities Deferred Tax Assets, Lease Liabilities Deferred Tax Assets, Lease Liabilities 2019 Employee Stock Purchase Plan Two Thousand Nineteen Employee Stock Purchase Plan [Member] Two thousand nineteen employee stock purchase plan. Property, Plant and Equipment, Type Property, Plant and Equipment, Type [Domain] Proceeds from issuance of convertible promissory notes and derivatives Proceeds from Convertible Debt Cancelled/forfeited (in dollars per unit) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value Remaining performance obligation Revenue, Remaining Performance Obligation, Amount Financial Instrument [Axis] Financial Instrument [Axis] Equity [Abstract] Cancelled/forfeited/expired (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period Preferred stock, shares outstanding (in shares) Preferred Stock, Shares Outstanding Atlassian Atlassian [Member] Atlassian member. Income Tax Authority [Domain] Income Tax Authority [Domain] Commitments and contingencies (Note 8) Commitments and Contingencies Long-term Debt, Type [Domain] Long-term Debt, Type [Domain] Deferred revenue, noncurrent Contract with Customer, Liability, Noncurrent Cash, cash equivalents, and restricted cash—beginning of period Cash, cash equivalents, and restricted cash—end of period Total cash, cash equivalents, and restricted cash Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents Debt Instrument [Line Items] Debt Instrument [Line Items] Variable Interest Entities Consolidation, Variable Interest Entity, Policy [Policy Text Block] Class of Stock Class of Stock [Domain] Cash and Cash Equivalents and Restricted Cash Cash and Cash Equivalents, Policy [Policy Text Block] Less than one year Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, within One Year, Fair Value Outstanding stock options, vested (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number Money market funds Money Market Funds [Member] Advertising expense Advertising Expense Domestic Income (Loss) from Continuing Operations before Income Taxes, Domestic Amortization of deferred contract acquisition costs Amortization of deferred contract acquisition costs Capitalized Contract Cost, Amortization Shares issued, price per share (in dollars per share) Sale of Stock, Price Per Share Vesting period of awards Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period Net income (loss) per share attributable to common stockholders: Earnings Per Share, Basic and Diluted [Abstract] Lessee, Lease, Description [Line Items] Lessee, Lease, Description [Line Items] Restricted cash from international employee stock sales Restricted Cash, Current Operating lease liabilities, net Increase (Decrease) In Operating Lease Liabilities Increase (decreaseD in operating lease liabilities net. Revenue remaining performance obligation, expected timing of satisfaction period Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period Third-Party Stock Transaction Third-Party Stock Transaction [Member] Third-Party Stock Transaction Unrecognized stock-based compensation expenses Share-based Payment Arrangement, Nonvested Award, Excluding Option, Cost Not yet Recognized, Amount Accrual for taxes other than income taxes, current Accrual for Taxes Other than Income Taxes, Current Document Fiscal Period Focus Document Fiscal Period Focus Financial Instruments [Domain] Financial Instruments [Domain] Other comprehensive income (loss) Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent Foreign Tax Foreign Tax Authority [Member] Tax credit carryforward Tax Credit Carryforward, Amount Significant Components of Deferred Income Tax Assets Schedule of Deferred Tax Assets and Liabilities [Table Text Block] Cash and Cash Equivalents [Axis] Cash and Cash Equivalents [Axis] Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] Deferred offering costs, accrued but not paid Deferred Offering Costs Incurred But Not Yet Paid Deferred Offering Costs Incurred But Not Yet Paid Vested (in dollars per unit) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] 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] Other Other Liabilities Other Noncurrent Other liabilities, other, noncurrent. Earnings Per Share, Diluted [Abstract] Earnings Per Share, Diluted [Abstract] Commercial paper Commercial Paper [Member] Income (loss) from operations Income (loss) from operations Operating Income (Loss) Summary of Restricted Stock Units (RSUs) Activity Under Equity Incentive Plan Share-based Payment Arrangement, Restricted Stock Unit, Activity [Table Text Block] Machinery and Equipment Machinery and Equipment [Member] Fair Value, Measurement Frequency Measurement Frequency [Domain] Adjustments for New Accounting Pronouncements Adjustments for New Accounting Pronouncements [Axis] Statement [Line Items] Statement [Line Items] Revenue Revenue from Contract with Customer, Excluding Assessed Tax Capitalized Contract Cost, Net Capitalized Contract Cost, Net [Roll Forward] Capitalized Contract Cost, Net Advertising Costs Advertising Cost [Policy Text Block] Fair Value Disclosures [Abstract] Basic (in dollars per share) Net income (loss) per share attributable to common stockholders, basic (in dollars per share) Earnings Per Share, Basic Conversion of convertible preferred stock to Class B common stock upon initial public offering Conversion of Stock, Amount Converted Aggregate intrinsic value, exercised Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value Beginning balance (in dollars per share) Ending balance (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price Net Income (Loss) Per Share Attributable to Common Stockholders Earnings Per Share, Policy [Policy Text Block] Comprehensive income (loss) Comprehensive Income (Loss), Net of Tax, Attributable to Parent Plan Name Plan Name [Axis] Summary Of Business And Significant Accounting Policies [Line Items] Summary Of Business And Significant Accounting Policies [Line Items] Summary of business and significant accounting policies. Subsequent Event Type Subsequent Event Type [Axis] Concentration Risk Benchmark [Domain] Concentration Risk Benchmark [Domain] 2021 Lessee, Operating Lease, Liability, Payments, Due Next Twelve Months Number of operating lease options Leases, Operating Lease, Options To Extend Leases, Operating Lease, Options To Extend Statement of Stockholders' Equity [Abstract] Amendment Flag Amendment Flag Other shares authorized (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized, Other Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized, Other Marketable Securities Cash, Cash Equivalents, and Marketable Securities [Text Block] Weighted- Average Exercise Price Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract] SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward] SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward] Common stock subject to repurchase or cancellation (in dollars per share) Common Stock Subject to Repurchase or Cancellation, Weighted Average Price Per Share Common Stock Subject to Repurchase or Cancellation, Weighted Average Price Per Share Amortized Cost Debt Securities, Available-for-sale, Amortized Cost Changes in operating assets and liabilities: Increase (Decrease) in Operating Capital [Abstract] Common stock, shares outstanding (in shares) Common Stock, Shares, Outstanding Weighted-average shares used in computing net income (loss) per share attributable to common stockholders: Weighted Average Number of Shares Outstanding, Diluted [Abstract] Fair Value, Inputs, Level 1 Fair Value, Inputs, Level 1 [Member] Consecutive offering period Share-Based Compensation Arrangement By Share-based Payment Award, Consecutive Offering Period Share-Based Compensation Arrangement By Share-based Payment Award, Consecutive Offering Period Expected unrecognized stock-based compensation expenses related to outstanding unvested stock options Share-based Payment Arrangement, Nonvested Award, Option, Cost Not yet Recognized, Amount Summary of Assumptions for Estimating Fair Value of ESPP Purchase Rights Schedule of Share-based Payment Award, Employee Stock Purchase Plan, Valuation Assumptions [Table Text Block] Proceeds from international employee stock sales to be remitted to employees and tax authorities Proceeds From Employee Stock Sales To Be Remitted Proceeds From Employee Stock Sales To Be Remitted Total future minimum payments Operating Leases, Future Minimum Payments Due Loss on derivative instruments, pretax Loss on Derivative Instruments, Pretax Class of Stock Class of Stock [Axis] Plan Name Plan Name [Domain] Convertible Preferred Stock, Stockholders’ Equity (Deficit) and Equity Incentive Plan Stockholders' Equity Note Disclosure [Text Block] Accounts receivable allowances SEC Schedule, 12-09, Allowance, Credit Loss [Member] Use of Estimates Use of Estimates, Policy [Policy Text Block] Shares subject to repurchase from early exercised stock options and restricted stock Shares Subject to Repurchase from Early Exercised Stock Options and Restricted Stock [Member] Shares Subject to Repurchase from Early Exercised Stock Options and Restricted Stock Cost of Revenue Cost of Goods and Service [Policy Text Block] Deferred tax asset valuation allowance SEC Schedule, 12-09, Valuation Allowance, Deferred Tax Asset [Member] Property, Plant and Equipment [Line Items] Property, Plant and Equipment [Line Items] Total operating lease payments Operating lease payments, due Lessee, Operating Lease, Liability, Payments, Due Schedule of Property and Equipment Property, Plant and Equipment [Table Text Block] Schedule of Stock by Class Reserved for Future Issuance Schedule of Stock by Class, Reserved for Future Issuance [Table Text Block] Schedule of Stock by Class, Reserved for Future Issuance Accounts receivable, net of allowances of $7,634 and $2,071 as of January 31, 2020 and 2019, respectively Accounts Receivable, after Allowance for Credit Loss, Current Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items] Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items] Operating lease expense Operating Lease, Expense Summary of Business and Significant Accounting Policies Organization, Consolidation, Basis of Presentation, Business Description and Accounting Policies [Text Block] Convertible preferred stock par value (in dollars per share) Temporary Equity, Par or Stated Value Per Share SEC Schedule, 12-09, Valuation Allowances and Reserves Type [Axis] SEC Schedule, 12-09, Valuation Allowances and Reserves Type [Axis] Conversion of convertible preferred stock to common stock upon initial public offering Temporary Equity Issued During Period, Value, Conversion of Convertible Securities To Stockholders' Equity Temporary Equity Issued During Period, Value, Conversion of Convertible Securities To Stockholders' Equity Prepaid Expense and Other Assets, Current Prepaid expenses and other current assets Prepaid Expense and Other Assets, Current Tax uncertainties Effective Income Tax Rate Reconciliation, Tax Contingency, Amount Granted (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross Schedule of Other Assets, Noncurrent Schedule of Other Assets, Noncurrent [Table Text Block] Summary Of Business And Significant Accounting Policies [Table] Summary Of Business And Significant Accounting Policies [Table] Summary of business and significant accounting policies. Issuance of common stock upon exercise of stock options (in shares) Exercised (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period Debt Instrument, Name Debt Instrument, Name [Domain] Research and Development Credit Carryforward Research Tax Credit Carryforward [Member] Total current assets Assets, Current Entity Current Reporting Status Entity Current Reporting Status State Deferred State and Local Income Tax Expense (Benefit) 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 Net income (loss) Net income (loss) Net Income (Loss) Attributable to Parent Proceeds from exercise of stock options, net of repurchases Proceeds from Stock Options Exercised Financial Liabilities: Liabilities, Fair Value Disclosure [Abstract] Common Stock Common Stock [Member] Current assets: Assets, Current [Abstract] Leases [Abstract] Series B Preferred Stock Series B Preferred Stock [Member] Debt Instrument Debt Instrument [Axis] Interest income and other, net Interest Income (Expense), Nonoperating, Net Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Disaggregation of Revenue [Line Items] Disaggregation of Revenue [Line Items] Reallocation of net income (loss) attributable to common stockholders Reallocation Of Net Income Loss Available To Common Stockholders Diluted Reallocation of net income loss available to common stockholders diluted. Operating lease, expense Operating Lease, Cost Tax Credit Carryforward [Axis] Tax Credit Carryforward [Axis] Entity Small Business Entity Small Business Commitments and Contingencies Disclosure [Abstract] Entity Filer Category Entity Filer Category Total deferred tax liabilities Deferred Tax Liabilities, Gross Other Assets, Non-current Other Noncurrent Assets [Member] Stock-based compensation expense Share-based Payment Arrangement, Expense Thereafter Lessee, Operating Lease, Liability, Payments, Due after Year Five Total liabilities, convertible preferred stock, and stockholders’ equity (deficit) Liabilities and Equity Certificate of deposit included in prepaid expenses and other current and noncurrent assets Prepaid Expenses And Other Current Assets Fair Value Disclosure Prepaid expenses and other current assets, fair value disclosure. Conversion of convertible preferred stock to common stock upon initial public offering (in shares) Convertible securities converted to common stock (in shares) Stock Issued During Period, Shares, Conversion of Convertible Securities Income Tax Disclosure [Abstract] Document Annual Report Document Annual Report Balance Sheet Components Supplemental Balance Sheet Disclosures [Text Block] Certificates of deposit Certificates of Deposit [Member] Percentage of revenue Percentage of Revenue Concentration Risk, Percentage Accrued expenses and other liabilities Increase (Decrease) in Accrued Liabilities and Other Operating Liabilities Marketable Securities [Table] Marketable Securities [Table] Conversion of convertible preferred stock to common stock upon initial public offering (in shares) Stock Issued During Period, Shares, Conversion of Convertible Securities From Temporary Equity Stock Issued During Period, Shares, Conversion of Convertible Securities From Temporary Equity Operating lease liabilities, noncurrent Operating Lease, Liability, Noncurrent Repurchase of convertible preferred stock Payments for Repurchase of Convertible Preferred Stock Operating expenses: Operating Expenses [Abstract] Schedule of Long-term Debt Instruments [Table] Schedule of Long-term Debt Instruments [Table] Preferred stock, shares authorized (in shares) Undesignated preferred stock shares authorized (in shares) Preferred Stock, Shares Authorized Tax Credit Carryforward, Name [Domain] Tax Credit Carryforward, Name [Domain] Restricted cash, current included in prepaid expenses and other current assets Restricted Cash and Cash Equivalents, Current Risk-free interest rate, maximum Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate, Maximum Number of common stock subject to repurchase (in shares) Weighted Average Number of Shares, Common Stock Subject to Repurchase or Cancellation Thereafter Operating Leases, Future Minimum Payments, Due Thereafter Net proceeds from shares issued Sale of Stock, Consideration Received on Transaction Stockholders’ equity (deficit): Stockholders' Equity Attributable to Parent [Abstract] Capitalized deferred offering costs within other assets, non-current Deferred Costs, Noncurrent Document Fiscal Year Focus Document Fiscal Year Focus State Current State and Local Tax Expense (Benefit) Schedule of Stock by Class [Table] Schedule of Stock by Class [Table] Shares issued (in shares) Sale of Stock, Number of Shares Issued in Transaction Concentration of Risks Concentration Risk, Credit Risk, Policy [Policy Text Block] Weighted average grant date fair value of options for employees (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value Convertible promissory notes – derivative liabilities included in other liabilities, noncurrent Derivative Liability Subsequent Events Subsequent Events [Text Block] Debt Securities, Available-for-sale, Realized Gain (Loss) Debt Securities, Available-for-sale, Realized Gain (Loss) Fair Value, Recurring Basis Fair Value, Recurring [Member] Accounts receivable, allowances Accounts Receivable, Allowance for Credit Loss, Current Operating loss carryforward Operating Loss Carryforwards Summary of Potential Shares of Common Stock Excluded from Computation of Diluted Net Income Per Share Attributable to Common Stockholders Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block] Award Type Award Type [Axis] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table] Schedule II: Valuation and Qualifying Accounts SEC Schedule, 12-09, Schedule of Valuation and Qualifying Accounts Disclosure [Text Block] Class of Stock [Line Items] Class of Stock [Line Items] Subsequent Events [Abstract] Accumulated other comprehensive income (loss) Accumulated Other Comprehensive Income (Loss), Net of Tax Other Other Assets, Miscellaneous, Noncurrent Cash payments included in the measurement of our operating lease liabilities Operating Lease, Payments Repurchase of Series A convertible preferred stock Stock Repurchased During Period, Value Geographical Geographical [Axis] Property, Plant and Equipment [Table] Property, Plant and Equipment [Table] (Accumulated Deficit) Retained Earnings Retained Earnings [Member] Subsequent Event Type Subsequent Event Type [Domain] Conversion of Stock, Name [Domain] Conversion of Stock, Name [Domain] 2011 and 2019 Plan Two Thousand Eleven Equity Incentive Plan and Two Thousand Nineteen Plan [Member] Two Thousand Eleven Equity Incentive Plan and Two Thousand Nineteen Plan Subsequent Event [Line Items] Subsequent Event [Line Items] Shares issued of common stock (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Shares Issued in Period Operating Leases Lessee, Operating Leases [Text Block] Purchase of equipment during the period included in accounts payable and accrued expenses Capital Expenditures Incurred but Not yet Paid Liabilities: Liabilities [Abstract] Document Period End Date Document Period End Date Other Other Assets, Current Statement [Table] Statement [Table] Entity Registrant Name Entity Registrant Name Foreign Current Foreign Tax Expense (Benefit) Common stock, conversion features, term Common Stock, Conversion Features, Term Common Stock, Conversion Features, Term Purchases of marketable securities Payments to Acquire Debt Securities, Available-for-sale State taxes Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount Receivables Billing Status Receivables Billing Status [Domain] Property, plant and equipment, useful life Property, Plant and Equipment, Useful Life Deferred Contract Acquisition Costs Capitalized Contract Cost [Table Text Block] Principal payments on capital lease obligations Repayments of Long-term Capital Lease Obligations Schedule of Financial Instruments Measured at Fair Value on Recurring Basis Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] Cash flows from investing activities: Net Cash Provided by (Used in) Investing Activities [Abstract] Conversion of debt to Class A common stock Debt Conversion, Converted Instrument, Amount Number of shares authorized (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized Maximum Maximum [Member] Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items] Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] 2023 Lessee, Operating Lease, Liability, Payments, Due Year Three Class B Common Stock Common Class B [Member] Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table] Share-based Payment Arrangement, Expensed and Capitalized, Amount [Table] Net income (loss) attributable to common stockholders Net income (loss) attributable to common stockholders Net Income (Loss) Available to Common Stockholders, Basic Weighted-average remaining contractual life (years) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term Estimated Fair Value Total Marketable securities Debt Securities, Available-for-sale Conversion of convertible preferred stock to common stock upon initial public offering (in shares) Temporary Equity Issued During Period, Shares, Conversion of Convertible Securities To Stockholders' Equity Temporary Equity Issued During Period, Shares, Conversion of Convertible Securities To Stockholders' Equity Restricted cash, noncurrent included in other assets, noncurrent Restricted Cash and Cash Equivalents, Noncurrent Deferred contract acquisition costs, noncurrent Capitalized Contract Cost, Net, Noncurrent Federal Income Tax Domestic Tax Authority [Member] Reconciliation of Unrecognized Tax Position Summary of Income Tax Contingencies [Table Text Block] Entity Public Float Entity Public Float Convertible preferred stock, $0.001 par value per share, zero and 158,104,540 shares authorized as of January 31, 2020 and 2019, respectively; zero and 152,665,804 shares issued and outstanding as of January 31, 2020 and 2019, respectively Beginning balance Ending balance Conversion of convertible preferred stock to common stock upon initial public offering Temporary Equity, Carrying Amount, Attributable to Parent Corporate bonds Corporate Bond Securities [Member] Antidilutive Securities, Name Antidilutive Securities, Name [Domain] Unrecognized tax benefits, if recognized, would impact effective tax rate Unrecognized Tax Benefits that Would Impact Effective Tax Rate Retained earnings (accumulated deficit) Retained Earnings (Accumulated Deficit) Series D Preferred Stock Series D Preferred Stock [Member] Convertible preferred stock Convertible Preferred Stock [Member] Selected Quarterly Financial Data (Unaudited) Quarterly Financial Information [Text Block] Debt instrument face amount Debt Instrument, Face Amount Diluted (in dollars per share) Net income (loss) per share attributable to common stockholders, diluted (in dollars per share) Earnings Per Share, Diluted Unrealized gain (loss) on available-for-sale marketable securities, net of tax Other Comprehensive Income (Loss), Securities, Available-for-Sale, Unrealized Holding Gain (Loss) Arising During Period, after Tax SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items] SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items] Accounts receivable, noncurrent Accounts Receivable, after Allowance for Credit Loss, Noncurrent Stock-based compensation Effective Income Tax Rate Reconciliation, Nondeductible Expense, Share-based Payment Arrangement, Amount Sales and marketing Selling and Marketing Expense Minimum Minimum [Member] Marketable Securities Marketable Securities, Policy [Policy Text Block] Entity Information [Line Items] Entity Information [Line Items] Accounts Receivable Accounts Receivable [Policy Text Block] Class A Common Stock Common Class A [Member] Investments, Debt and Equity Securities [Abstract] Undistributed earnings attributable to participating securities Less: undistributed earnings attributable to participating securities Undistributed Earnings (Loss) Allocated to Participating Securities, Basic Deferred commissions Deferred Tax Liabilities, Contract With Customer Liabilities Deferred Tax Liabilities, Contract With Customer Liabilities Debt instrument term Debt Instrument, Term Balance Sheet Location Balance Sheet Location [Domain] Deferred income tax expense (benefit), total Deferred Income Tax Expense (Benefit) Equity Securities without Readily Determinable Fair Value Equity Securities without Readily Determinable Fair Value [Policy Text Block] Number of additional shares allowable under the plan (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Number of Additional Shares Allowable Under The Plan Share-based Compensation Arrangement by Share-based Payment Award, Number of Additional Shares Allowable Under The Plan Range [Domain] Statistical Measurement [Domain] Adjustments to reconcile net income (loss) to net cash provided by operating activities: Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] 2023 Operating Leases, Future Minimum Payments, Due in Four Years Summary of Stock Option Activity Under Equity Incentive Plan Share-based Payment Arrangement, Option, Activity [Table Text Block] Net cash provided by (used in) financing activities Net Cash Provided by (Used in) Financing Activities Aggregate intrinsic value, vested and exercisable Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value Number of purchase periods Share-Based Compensation Arrangement By Share-based Payment Award, Number Of Purchase Periods Share-Based Compensation Arrangement By Share-based Payment Award, Number Of Purchase Periods Expected dividend yield Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate Provision for income taxes Total provision for income taxes Income Tax Expense (Benefit) Operating Leases Future Minimum Lease Payments [Abstract] Lessee, Operating Lease, Liability, Payment, Due [Abstract] Common stock number of votes per share Common Stock, Number of Votes per Share Common Stock, Number of Votes per Share 2022 Lessee, Operating Lease, Liability, Payments, Due Year Two 2011 Plan Two Thousand Eleven Equity Incentive Plan [Member] Two thousand eleven equity incentive plan. Balance at Beginning of Year Balance at End of Year SEC Schedule, 12-09, Valuation Allowances and Reserves, Amount Property and equipment Deferred Tax Liabilities, Property, Plant and Equipment Deferred: Deferred Income Tax Expense (Benefit), Continuing Operations [Abstract] Revenue from Contract with Customer [Abstract] Other liabilities, noncurrent Other liabilities, noncurrent Other Liabilities, Noncurrent Risk-free interest rate, minimum Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate, Minimum Conversion of convertible preferred stock to common stock upon initial public offering Stock Issued During Period, Value, Conversion of Convertible Securities From Temporary Equity Stock Issued During Period, Value, Conversion of Convertible Securities From Temporary Equity Prepaid expenses and other assets Increase (Decrease) in Prepaid Expense and Other Assets Weighted average exercise price, vested and exercisable (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price Proceeds from issuance of common stock fro employee stock purchase plan (in shares) Stock Issued During Period, Shares, Employee Stock Purchase Plans Total financial assets Assets, Fair Value Disclosure Number of shares available for future issuance (in shares) Common Stock, Capital Shares Reserved for Future Issuance Counterparty Name Counterparty Name [Axis] Net income (loss) per share attributable to common stockholders: Earnings Per Share [Abstract] Fair Value Hierarchy and NAV Fair Value Hierarchy and NAV [Axis] Property and Equipment, Net Property, Plant and Equipment, Policy [Policy Text Block] Purchase of equity investment Purchase of equity investment Payments To Acquire Equity Securities Without Readily Determinable Fair Value Payments To Acquire Equity Securities Without Readily Determinable Fair Value Schedule of Future Minimum Lease Payments included in Measurement of Operating Lease Liabilities Lessee, Operating Lease, Liability, Maturity [Table Text Block] Billed consideration Billed Revenues [Member] Granted (in dollars per unit) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value SEC Schedule, 12-09, Valuation Allowances and Reserves [Domain] SEC Schedule, 12-09, Valuation Allowances and Reserves [Domain] Total Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract] Treasury bills US Treasury Bill Securities [Member] Furniture and Fixtures Furniture and Fixtures [Member] Assets Assets [Abstract] Gross Unrealized Gains Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax Series C Preferred Stock Series C Preferred Stock [Member] Shares outstanding (in shares) Shares, Outstanding Preferred stock, par value (in dollars per share) Undesignated referred stock par value (in dollars per share) Preferred Stock, Par or Stated Value Per Share Entity Ex Transition Period Entity Ex Transition Period Number of operating segments Number of Operating Segments Total current income tax expense Current Income Tax Expense (Benefit) Weighted-average remaining lease term Operating Lease, Weighted Average Remaining Lease Term Purchase of property and equipment under capital lease Lease Obligation Incurred Quarterly Financial Information Disclosure [Abstract] Stockholders' equity note, stock split, conversion ratio Stockholders' Equity Note, Stock Split, Conversion Ratio Summary of Stock-based Compensation Expense by Line Item Share-based Payment Arrangement, Cost by Plan [Table Text Block] Change in federal tax rate Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount Cash flows from operating activities: Net Cash Provided by (Used in) Operating Activities [Abstract] Total operating expenses Operating Expenses Accrual for taxes other than income taxes, noncurrent Accrual for Taxes Other than Income Taxes, Noncurrent Accrual for Taxes Other than Income Taxes, Noncurrent Due in one to five years Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after One Through Five Years, Fair Value Entity Well-known Seasoned Issuer Entity Well-known Seasoned Issuer Issuance of common stock upon exercise of stock options, net of repurchases and release of restricted stock units Stock Issued During Period, Value, Stock Options Exercised, Net Of Stock Repurchased Stock Issued During Period, Value, Stock Options Exercised, Net Of Stock Repurchased Less: imputed interest Lessee, Operating Lease, Liability, Undiscounted Excess Amount Rent expense Operating Leases, Rent Expense, Net Beginning balance Ending balance Total deferred contract acquisition costs Capitalized Contract Cost, Net Supplemental disclosures of non-cash investing and financing information Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract] Issuance of common stock upon exercise of stock options Stock Issued During Period, Value, Stock Options Exercised Internal Use Software, Software to be Sold, Leased, or Otherwise Marketed, Policy Internal Use Software, Software to be Sold, Leased, or Otherwise Marketed, Policy [Policy Text Block] Internal Use Software, Software to be Sold, Leased, or Otherwise Marketed, Policy Americas Americas [Member] Debt Disclosure [Abstract] Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Income Statement Location Income Statement Location [Domain] Range Statistical Measurement [Axis] Supplemental disclosures of cash flow information Supplemental Cash Flow Information [Abstract] Repurchase of Series A convertible preferred stock (in shares) Temporary equity repurchased during period (in shares) Temporary Equity Repurchased During Period, Shares Temporary Equity Repurchased During Period, Shares Purchase obligation Purchase Obligation Weighted-average discount rate Operating Lease, Weighted Average Discount Rate, Percent Unbilled accounts receivable Contract with Customer, Asset, after Allowance for Credit Loss Aggregate intrinsic value Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value Federal Deferred Federal Income Tax Expense (Benefit) Outstanding Stock Options Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] Basis of Presentation Basis of Accounting, Policy [Policy Text Block] Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Table Text Block] Accounts payable Increase (Decrease) in Accounts Payable Statement of Financial Position [Abstract] Revenue Recognition Revenue from Contract with Customer [Policy Text Block] Cash paid for income taxes Income Taxes Paid, Net Issuance of common stock reserved for charitable donations Stock Issued During Period, Value, Charitable Donation Stock Issued During Period, Value, Charitable Donation Earnings Per Share, Basic [Abstract] Earnings Per Share, Basic [Abstract] Expected volatility, minimum Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate, Minimum Convertible Promissory Notes Debt Disclosure [Text Block] Capitalized contract cost, amortization period Capitalized Contract Cost, Amortization Period Disaggregation of Revenue by Region Revenue from External Customers by Geographic Areas [Table Text Block] Entities [Table] Entities [Table] Common stock, shares authorized (in shares) Common Stock, Shares Authorized Remaining performance obligation percentage Revenue, Remaining Performance Obligation, Percentage Additions to deferred contract acquisition costs Capitalized Contract Cost, Additions Capitalized Contract Cost, Additions Statement of Cash Flows [Abstract] Entity Central Index Key Entity Central Index Key Convertible preferred stock, shares authorized (in shares) Temporary Equity, Shares Authorized Beginning balance (in units) Ending balance (in units) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number Percent of outstanding stock, maximum Share-based Compensation Arrangement by Share-based Payment Award, Percentage of Outstanding Stock Maximum Entity Emerging Growth Company Entity Emerging Growth Company Increases related to current years’ tax positions Unrecognized Tax Benefits, Increase Resulting from Current Period Tax Positions Sale of Stock Sale of Stock [Domain] Operating lease liabilities, current Accrued expenses and other current liabilities Operating Lease, Liability, Current Stock-based compensation expense Share-based Payment Arrangement, Noncash Expense Schedule of Computation of Basic and Diluted Net Income (Loss) Per Share Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Financial Assets: Assets, Fair Value Disclosure [Abstract] State Income Tax State and Local Jurisdiction [Member] Software Software Development [Member] Income Taxes Income Tax, Policy [Policy Text Block] Foreign rate differential Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential, Amount Unbilled consideration Unbilled Revenues [Member] Fair Value, Inputs, Level 2 Fair Value, Inputs, Level 2 [Member] Income Taxes Income Tax Disclosure [Text Block] Lease contractual period Lessee, Operating Lease, Term of Contract Purchases of intangible assets Payments to Acquire Intangible Assets Antidilutive Securities Antidilutive Securities [Axis] Operating right-of-use assets Deferred Tax Liabilities, Right Of Use Assets Deferred Tax Liabilities, Right Of Use Assets 2020 Operating Leases, Future Minimum Payments Due, Next Twelve Months Concentration Risk Type [Axis] Concentration Risk Type [Axis] Issuance of common stock upon exercise of stock options, net of repurchases (in shares) Share-Based Compensation Arrangement By Share-Based Payment Award, Options, Exercises In Period, Net Of Stock Repurchased Share-Based Compensation Arrangement By Share-Based Payment Award, Options, Exercises In Period, Net Of Stock Repurchased Permanent items Effective Income Tax Rate Reconciliation, Nondeductible Expense, Other, Amount Proceeds from issuance of common stock for employee stock purchase plan Proceeds, Issuance of Shares, Share-based Payment Arrangement, Excluding Option Exercised Fair Value Measurements Fair Value Measurement, Policy [Policy Text Block] Preferred stock, shares issued (in shares) Preferred Stock, Shares Issued Revenue from Contract with Customer Revenue from Contract with Customer Benchmark [Member] Research and Development Research and Development Expense, Policy [Policy Text Block] U.S. government agency securities US Government Agencies Debt Securities [Member] Liabilities, convertible preferred stock, and stockholders’ equity (deficit) Liabilities and Equity [Abstract] Other assets, noncurrent Other assets, noncurrent Other Assets, Noncurrent Cash flows from financing activities: Net Cash Provided by (Used in) Financing Activities [Abstract] Type of Adoption Type of Adoption [Domain] Organization, Consolidation and Presentation of Financial Statements [Abstract] Entity Voluntary Filers Entity Voluntary Filers Over-Allotment Option Over-Allotment Option [Member] Segment Information Segment Reporting, Policy [Policy Text Block] Distributed earnings attributable to participating securities Distributed Earnings Distributed Earnings Fair Value Hierarchy and NAV Fair Value Hierarchy and NAV [Domain] Purchases of property and equipment Payments to Acquire Property, Plant, and Equipment Equity investment Equity Securities without Readily Determinable Fair Value, Amount Schedule of Other Liabilities, Noncurrent Other Noncurrent Liabilities [Table Text Block] 2025 Lessee, Operating Lease, Liability, Payments, Due Year Five Other assets, noncurrent Other Assets, Fair Value Disclosure Other Other Liabilities, Current Sale of Stock Sale of Stock [Axis] Provision for accounts receivable allowances Accounts Receivable, Credit Loss Expense (Reversal) Subsequent Event [Table] Subsequent Event [Table] Unrecognized stock-based compensation excepted to be recognized over a weighted-average period Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition Accounting Policies [Abstract] Convertible preferred stock, aggregate liquidation preference Temporary Equity, Liquidation Preference Accrued expenses and other current liabilities Accrued expenses and other current liabilities Accrued Liabilities And Other Liabilities Current Accrued liabilities and other liabilities current. Additional Paid-In Capital Additional Paid-in Capital [Member] Revenue Recognition Revenue from Contract with Customer [Text Block] Relationship to Entity Title of Individual [Domain] Net operating loss carryforwards Deferred Tax Assets, Operating Loss Carryforwards Prepaid expenses Prepaid Expense, Current Share-Based Compensation Share-based Payment Arrangement [Policy Text Block] Tax at federal statutory rate Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount Accrual for taxes other than income taxes Accrual for Taxes Other than Income Taxes Stockholders' equity note, stock split, conversion ratio, shares (in shares) Stockholders' Equity Note, Stock Split, Number Of Shares Per Share In Stock Split Stockholders' Equity Note, Stock Split, Number Of Shares Per Share In Stock Split Interest rate percentage Debt Instrument, Interest Rate, Stated Percentage Shares reserved for issuance, percentage Share-Based Compensation Arrangements By Share Based Payment Award, Increase In Shares Reserved For Issuance, Percentage Share-Based Compensation Arrangements By Share Based Payment Award, Increase In Shares Reserved For Issuance, Percentage Foreign Deferred Foreign Income Tax Expense (Benefit) Payroll deductions to participate in plan Share-based Compensation Arrangement by Share-based Payment Award, Maximum Employee Subscription Rate Chief Executive Officer Chief Executive Officer [Member] Agency bonds Municipal Bonds [Member] Property and equipment, gross Property, Plant and Equipment, Gross Increase (Decrease) in Temporary Equity [Roll Forward] Increase (Decrease) in Temporary Equity [Roll Forward] Deferred contract acquisition costs, current Capitalized Contract Cost, Net, Current Percentage of purchase price of common stock to fair market value of common stock on offering or purchase date Share-based Compensation Arrangement by Share-based Payment Award, Purchase Price of Common Stock, Percent Vesting of early exercised stock options and restricted stock awards Share-Based Compensation Arrangement By Share-Based Payment Award, Vesting In Period, Early Exercises Share-Based Compensation Arrangement By Share-Based Payment Award, Vesting In Period, Early Exercises Repurchase of Series A convertible preferred stock Temporary Equity Repurchased During Period, Value Temporary Equity Repurchased During Period, Value Gross profit Gross profit Gross Profit Geographical Geographical [Domain] Components of the Net Income (Loss) before Provision of Income Taxes Schedule of Income before Income Tax, Domestic and Foreign [Table Text Block] Current: Current Income Tax Expense (Benefit), Continuing Operations [Abstract] Deferred revenue Deferred Tax Asset, Contract With Customer Liability Deferred Tax Asset, Contract With Customer Liability Income Statement Location Income Statement Location [Axis] Total financial liabilities Financial and Nonfinancial Liabilities, Fair Value Disclosure Summary of Contractual Maturities of Marketable Securities Investments Classified by Contractual Maturity Date [Table Text Block] Initial public offering IPO [Member] Initial offering period Common Stock, Anniversary Of Closing IPO Initial Offering Period Net cash used in investing activities Net Cash Provided by (Used in) Investing Activities Fair Value Measurements, Recurring and Nonrecurring [Table] Fair Value, Recurring and Nonrecurring [Table] Other Other Operating Activities, Cash Flow Statement Lessee, Lease, Description [Table] Lessee, Lease, Description [Table] Income Tax Authority [Axis] Income Tax Authority [Axis] Write off of deferred debt issuance cost Write off of Deferred Debt Issuance Cost General and administrative General and Administrative Expense Accounts payable Accounts Payable, Current Share-based Compensation Arrangement By Share-based Payment Award, Percentage Voting Power Excluded From Participating In Plan Share-based Compensation Arrangement By Share-based Payment Award, Percentage Voting Power Excluded From Participating In Plan Share-based Compensation Arrangement By Share-based Payment Award, Percentage Voting Power Excluded From Participating In Plan Accrued expenses Accrued Liabilities, Current Research and development credit carryforwards Deferred Tax Assets, Tax Credit Carryforwards, Research Schedule of Accrued Expenses and Other Current Liabilities Accrued Expenses And Other Current Liabilities [Table Text Block] Accrued expenses and other current liabilities. Corporate and other debt securities Corporate And Other Debt Securities [Member] Corporate And Other Debt Securities Geographic Concentration Risk Geographic Concentration Risk [Member] Common stock, shares issued (in shares) Common Stock, Shares, Issued Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Common stock, par value (in dollars per share) Common Stock, Par or Stated Value Per Share Research and development credits Effective Income Tax Rate Reconciliation, Tax Credit, Research, Amount Deferred contract acquisition costs Increase (Decrease) in Capitalized Contract Costs Increase decrease in Deferred contract acquisition costs. Beginning balance (in dollars per unit) Ending balance (in dollars per unit) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value Long-lived Assets by Geographic Areas Long-lived Assets by Geographic Areas [Table Text Block] Maximum number of shares per employee (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Maximum Number of Shares Per Employee Professional Services Fees Concentration Risk Professional Services Fees Concentration Risk [Member] Professional Services Fees Concentration Risk Measurement Frequency Measurement Frequency [Axis] Net Income (Loss) Per Share Attributable to Common Stockholders Earnings Per Share [Text Block] Schedule of Stock by Class Schedule of Stock by Class [Table Text Block] Number of shares available for grant (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant Share price per share (in dollars per share) Debt Instrument, Convertible, Conversion Price Less: accumulated depreciation and amortization Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Equity Award Award Type [Domain] 2024 Operating Leases, Future Minimum Payments, Due in Five Years Term of 2019 stock plan Share-based Compensation Arrangement by Share-based Payment Award, Term of Stock Plan Share-based Compensation Arrangement by Share-based Payment Award, Term of Stock Plan Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Granted (in dollars per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price Leasehold Improvements Leasehold Improvements [Member] Issuance of common stock for employee stock purchase plan Stock Issued During Period, Value, Employee Stock Purchase Plan Issuance of common stock upon initial public offering and private placement net of underwriting discounts and commissions and other offering costs (in shares) Stock Issued During Period, Shares, New Issues SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Table] SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Table] 2019 Plan Two Thousand Nineteen Equity Incentive Plan [Member] Two thousand nineteen equity incentive plan. Weighted average price per share (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Per Share Weighted Average Price of Shares Purchased Accounting Standards Update 2016-02 Accounting Standards Update 2016-02 [Member] Stock Conversion Description [Axis] Stock Conversion Description [Axis] Marketable Securities [Line Items] Marketable Securities [Line Items] Cost of revenue Cost of Sales [Member] RSUs Unvested RSUs Restricted Stock Units (RSUs) [Member] Research and development Research and Development Expense [Member] Effective tax rate Effective Income Tax Rate Reconciliation, Percent Change in valuation allowance Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount Disaggregation of Revenue [Table] Disaggregation of Revenue [Table] ESPP excess rate purchase right, value Share-based Compensation Arrangement by Share-based Payment Award, Maximum Employee Subscription Amount Share-based Compensation Arrangement by Share-based Payment Award, Maximum Employee Subscription Amount Provision of Income Taxes Schedule of Components of Income Tax Expense (Benefit) [Table Text Block] 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] Total liabilities Liabilities Proceeds for unvested shares of common stock Accrued Employee Benefits, Unvested Shares, Current Accrued Employee Benefits, Unvested Shares, Current Accrued compensation and benefits Accrued Employee Benefits, Current Provision for Income Taxes Schedule of Effective Income Tax Rate Reconciliation [Table Text Block] Common stock, $0.001 par value per share, 2,000,000,000 and 320,000,000 Class A shares authorized as of January 31, 2020 and 2019, respectively; 123,391,114 and zero shares issued and outstanding as of January 31, 2020 and 2019, respectively; 300,000,000 Class B shares authorized as of January 31, 2020 and 2019; 155,336,747 and 90,327,435 shares issued and outstanding as of January 31, 2020 and 2019, respectively Common Stock, Value, Issued Sales and marketing Selling and Marketing Expense [Member] Reconciliation of cash, cash equivalents, and restricted cash within the consolidated balance sheets to the amounts shown in the consolidated statements of cash flows above: Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents [Abstract] Research and development Research and Development Expense Additions SEC Schedule, 12-09, Valuation Allowances and Reserves, Additions, Charge to Cost and Expense Cancelled/forfeited/expired (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period, Weighted Average Exercise Price Counterparty Name Counterparty Name [Domain] Statement of Comprehensive Income [Abstract] Expected volatility, maximum Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate, Maximum Cash and cash equivalents Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Stock-based compensation Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Share-based Compensation Cost Basic (in shares) Weighted-average shares used in computing net income (loss) per share attributable to common stockholders, basic (in shares) Weighted Average Number of Shares Outstanding, Basic Operating lease right-of-use assets Operating lease, total ROU assets Operating Lease, Right-of-Use Asset Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract] Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract] Equity Components Equity Components [Axis] 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] Cash and Cash Equivalents [Domain] Cash and Cash Equivalents [Domain] Net deferred tax assets Deferred Tax Assets, Net Issuance of common stock reserved for charitable donation (in shares) Stock Issued During Period, Shares, Charitable Donation Stock Issued During Period, Shares, Charitable Donation Impairment of Long-Lived Assets Impairment or Disposal of Long-Lived Assets, Policy [Policy Text Block] Total stockholders’ equity (deficit) Beginning balance Ending balance Stockholders' Equity Attributable to Parent Issuance of common stock reserved for charitable donation (in shares) Common Stock, Capital Shares Reserved for Future Issuance, Charitable Donation Common Stock, Capital Shares Reserved for Future Issuance, Charitable Donation Concentration Risk Type [Domain] Concentration Risk Type [Domain] Stock plan rate Share-based Compensation Arrangement by Share-based Payment Award, Stock Plan Rate Share-based Compensation Arrangement by Share-based Payment Award, Stock Plan Rate Deferred Tax Liabilities, Net [Abstract] Deferred Tax Liabilities, Net [Abstract] Dropbox Dropbox [Member] Dropbox member Cancelled/forfeited (in units) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period Total deferred tax assets net of valuation allowance Deferred Tax Assets, Net of Valuation Allowance Deferred revenue, current Contract with Customer, Liability, Current APAC Asia Pacific [Member] Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Axis] Interest and penalties Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense Convertible Debt Convertible Debt [Member] Schedule of Supplemental Balance Sheet Information Assets And Liabilities, Lessee [Table Text Block] Tabular disclosure of operating lease supplemental balance sheet information table text block. Fair Value Measurements Fair Value Disclosures [Text Block] Federal Current Federal Tax Expense (Benefit) Supplemental Cash Flow and Other Information Lease, Cost [Table Text Block] EMEA EMEA [Member] Depreciation and amortization Depreciation, Depletion and Amortization Aggregate proceeds from shares issued Sale of Stock, Consideration Received Per Transaction Conversion of convertible preferred stock to common stock upon initial public offering Stock Issued During Period, Value, Conversion of Convertible Securities Preferred stock, $0.001 par value per share, 200,000,000 and zero shares authorized as of January 31, 2020 and 2019, respectively; zero shares issued and outstanding as of January 31, 2020 and 2019 Preferred Stock, Value, Issued Convertible preferred stock, shares outstanding (in shares) Beginning balance (in shares) Ending balance (in shares) Temporary Equity, Shares Outstanding Cash equivalents Cash and Cash Equivalents, Fair Value Disclosure Antidilutive securities excluded from computation of earnings (loss) per share (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Tax Credit Carryforward [Table] Tax Credit Carryforward [Table] Deferred Tax Assets, Net [Abstract] Deferred Tax Assets, Net [Abstract] Long-term Debt, Type [Axis] Long-term Debt, Type [Axis] Additional paid-in capital Additional Paid in Capital, Common Stock Marketable securities Debt Securities, Available-for-sale, Current Net cash provided by operating activities Net Cash Provided by (Used in) Operating Activities Unvested RSUs Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] Equity Component Equity Component [Domain] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] Expected term (years) Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term Deferred revenue Increase (Decrease) in Contract with Customer, Liability Document Transition Report Document Transition Report Stock options Outstanding stock options Share-based Payment Arrangement, Option [Member] Schedule of Earnings Per Share, Basic, by Common Class, Including Two Class Method [Table] Schedule of Earnings Per Share, Basic, by Common Class, Including Two Class Method [Table] Liabilities to employees and tax authorities from international employee stock sales Employee-related Liabilities, Employee Stock Sales, Current Employee-related Liabilities, Employee Stock Sales, Current Convertible promissory notes, net of debt discount Convertible Debt, Noncurrent Principal payments on capital lease obligations Finance Lease, Principal Payments Net income (loss) attributable to common stockholders, diluted Net Income (Loss) Available to Common Stockholders, Diluted Total deferred tax assets net of valuation allowance Deferred Tax Assets, Gross 2022 Operating Leases, Future Minimum Payments, Due in Three Years Purchase rights committed under the ESPP ESPP Employee Stock [Member] Income Statement [Abstract] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis] Balance Sheet Location Balance Sheet Location [Axis]