Issuance of common stock upon vesting of Restricted Stock Units (“RSUs”) Stock Issued During Period, Value, Restricted Stock Award, Gross Investments Investment, Policy [Policy Text Block] Level 3 Fair Value, Inputs, Level 3 [Member] Claims outstanding Loss Contingency, Pending Claims, Number Leases Lessee, Leases [Policy Text Block] Stock-based compensation APIC, Share-based Payment Arrangement, Increase for Cost Recognition Foreign Currency Foreign Currency Transactions and Translations Policy [Policy Text Block] Contract with customer, liability, revenue recognized Contract with Customer, Liability, Revenue Recognized Total current liabilities Liabilities, Current Deferred costs Deferred Costs, Current Property, Plant and Equipment, Type [Axis] Property, Plant and Equipment, Type [Axis] Granted (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period Computer hardware Computer Hardware Gross Computer hardware gross. Recently Adopted Accounting Pronouncements New Accounting Pronouncements, Policy [Policy Text Block] Total cost of revenue Cost of Goods and Services Sold Released (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period Current Fiscal Year End Date Current Fiscal Year End Date Segment Reporting, Asset Reconciling Item [Line Items] Segment Reporting, Asset Reconciling Item [Line Items] Services Service [Member] Stockholders Equity and Stock Based Compensation (Additional Textual) [Abstract] Stockholders Equity and Stock Based Compensation (Additional Textual) [Abstract] Stockholders equity and stock based compensation. Derivative [Line Items] Derivative [Line Items] Deposits and other receivables Deposits And Other Receivables, Current Deposits And Other Receivables, Current Diluted (in shares) Weighted Average Number of Shares Outstanding, Diluted Entity Address, Postal Zip Code Entity Address, Postal Zip Code Balance at beginning of period (in shares) Balance at end of period (in shares) Exercise of stock options to purchase common stock (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number Short-term investments: Available-for-sale Securities, Current Canada CANADA Debt discount Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net Property and equipment, net Property and equipment, net Property, Plant and Equipment, Net Amortized Cost Available-for-sale Securities, Amortized Cost Basis Accumulated other comprehensive income (loss) AOCI Attributable to Parent [Member] TOTAL ASSETS Assets Common Stock Reserved for Issuance Common Stock Reserved for Issuance [Abstract] Common stock reserved for issuance. Exercised (in dollars per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price Entity Shell Company Entity Shell Company Decrease in operating lease liability Total lease liability balance Total lease liabilities Operating Lease, Liability Cover [Abstract] Document Type Document Type Effective interest rate Debt Instrument, Interest Rate, Effective Percentage Shares repurchased (in shares) Treasury Stock, Shares, Acquired 12 Months or Greater Available For Sale Securities, Debt Maturities NonCurrent Available For Sale Securities, Debt Maturities NonCurrent Accrual for shares repurchased Stock Repurchase Costs Incurred But Not Yet Paid Stock Repurchase Costs Incurred But Not Yet Paid Accrued taxes Accrued Income Taxes, Current General and administrative General and Administrative Expense [Member] Stock awards Restricted Stock [Member] Accounts receivable Increase (Decrease) in Accounts Receivable 2024 Lessee, Operating Lease, Liability, Payments, Due Year Four Threshold trading days Debt Instrument, Convertible, Threshold Trading Days CURRENT LIABILITIES: Liabilities, Current [Abstract] Operating lease assets obtained in exchange for lease liabilities Right-of-Use Asset Obtained in Exchange for Operating Lease Liability Property, Plant and Equipment, Type [Domain] Property, Plant and Equipment, Type [Domain] Foreign government bonds Debt Security, Government, Non-US [Member] 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 Remaining performance obligation, amount Revenue, Remaining Performance Obligation, Amount Financial Instrument [Axis] Financial Instrument [Axis] Segment Information Segment Reporting Disclosure [Text Block] Effect of foreign exchange rate changes on cash and cash equivalents Effect of Exchange Rate on Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents Net impact of deferred stock-based compensation Share-based Payment Arrangement, Amount Capitalized Document Quarterly Report Document Quarterly Report Long-term Debt, Type [Domain] Long-term Debt, Type [Domain] Deferred revenue, net Contract with Customer, Liability, Noncurrent Cash and cash equivalents CASH AND CASH EQUIVALENTS—Beginning of period CASH AND CASH EQUIVALENTS—End of period Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents Debt Instrument [Line Items] Debt Instrument [Line Items] Remaining authorized amount Stock Repurchase Program, Remaining Authorized Repurchase Amount Basic and diluted (in shares) Weighted Average Number of Shares Outstanding, Basic and Diluted Class of Stock [Domain] Class of Stock [Domain] Cash and Cash Equivalents Cash and Cash Equivalents, Policy [Policy Text Block] Exercisable as of January 31, 2020 (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number Money market funds Money Market Funds [Member] Amortization of capitalized contract cost Capitalized Contract Cost, Amortization Issuance of common stock upon vesting of Restricted Stock Units (RSU) (in shares) Stock Issued During Period, Shares, Restricted Stock Award, Gross Accounts receivable, net Accounts Receivable, after Allowance for Credit Loss Entity File Number Entity File Number Period of time based Vesting Period of time based Vesting Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period Convertible senior notes, net Senior Notes Canceled (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures in Period Debt Instrument, Redemption, Period [Domain] Debt Instrument, Redemption, Period [Domain] Estimated useful lives of property and equipment Schedule of Estimated Useful Lives of Property and Equipment [Table Text Block] Schedule of estimated useful lives of property and equipment. Document Fiscal Period Focus Document Fiscal Period Focus Supplemental Lease Information Assets And Liabilities, Lessee [Table Text Block] Assets And Liabilities, Lessee Financial Instruments [Domain] Financial Instruments [Domain] Reclassification adjustment for realized gains (losses) included in net income (loss) Reclassification adjustment for realized gain (loss) on available-for-sale securities, included in net income (loss) Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Net of Tax United Kingdom UNITED KINGDOM Product and Service [Domain] Product and Service [Domain] Cash and Cash Equivalents [Axis] Cash and Cash Equivalents [Axis] 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 Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Commercial paper Commercial Paper [Member] Income (loss) from operations Operating Income (Loss) Interest income Interest Income, Nonoperating, Net Interest Income, Nonoperating, Net Goodwill Goodwill Schedule of Share-based Compensation, Restricted Stock Units Award Activity Share-based Payment Arrangement, Restricted Stock Unit, Activity [Table Text Block] Equipment and machinery Machinery and Equipment [Member] Common Stock Reserved for Issuance Common Stock Reserved For Issuance [Table Text Block] Common stock reserved for issuance. Statement [Line Items] Statement [Line Items] Total revenue Revenue from Contract with Customer, Excluding Assessed Tax Disaggregation of Revenue Disaggregation of Revenue [Table Text Block] Subscription Subscription [Member] Subscription [Member] Advertising Costs Advertising Cost [Policy Text Block] Cost of subscription and support revenue Cost Of Subscription And Support Revenue [Member] Cost Of Subscription And Support Revenue Fair Value Disclosures [Abstract] Fair Value Disclosures [Abstract] Basic (in dollars per share) Earnings Per Share, Basic Exercised Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value Balance at beginning of period (in dollars per share) Balance at end of period (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price Strike price (in usd per share) Derivative, Price Risk Option Strike Price Comprehensive income (loss) Comprehensive Income (Loss), Net of Tax, Attributable to Parent Net income (loss) per share: Net Income Loss Per Share [Abstract] Net income (loss) per share. Schedule Of Antidilutive Securities Excluded From Computation Of Earnings Per Share [Table] Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Concentration Risk Benchmark [Domain] Concentration Risk Benchmark [Domain] Amortization of debt discount Amortization of Debt Discount (Premium) Statement of Stockholders' Equity [Abstract] Statement of Stockholders' Equity [Abstract] Amendment Flag Amendment Flag Schedule of Finite-Lived Intangible Assets Schedule of Finite-Lived Intangible Assets [Table Text Block] Weighted Average Exercise Price Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract] Fair Value, Assets Measured on Recurring Basis Fair Value, Assets Measured on Recurring Basis [Table Text Block] Support Support [Member] Support Stock-based compensation expense Share-based Payment Arrangement, Expensed and Capitalized, Amount Shares outstanding (in shares) Common Stock, Shares, Outstanding Amortization Amortization Changes in operating assets and liabilities: Increase (Decrease) in Operating Capital [Abstract] Shares used in computing net income (loss) per share: Weighted average shares used in computing net income (loss) per share: Weighted Average Number of Shares Outstanding, Diluted [Abstract] Level 1 Fair Value, Inputs, Level 1 [Member] Interest expense Contractual interest expense Interest Expense Commission Accrued Sales Commission, Current Class of Stock [Axis] Class of Stock [Axis] Use of Estimates Use of Estimates, Policy [Policy Text Block] Local Phone Number Local Phone Number Expected volatility of the Company Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate Property, Plant and Equipment [Line Items] Property, Plant and Equipment [Line Items] Total future lease payments Lessee, Operating Lease, Liability, Payments, Due Property and equipment Property, Plant and Equipment [Table Text Block] Company and Summary of Significant Accounting Policies and Estimates (Textual) [Abstract] Company and Summary of Significant Accounting Policies and Estimates (Textual) [Abstract] Company and summary of significant accounting policies and estimates. Accounts receivable, net of allowances of $1,392 and $1,276, respectively Accounts Receivable, after Allowance for Credit Loss, Current Balance Sheet Related Disclosures [Abstract] Balance Sheet Related Disclosures [Abstract] Long-lived asset, including intangibles and goodwill Property, Plant and Equipment [Abstract] Stock-Based Compensation Expense and Shareholders' Equity Shareholders' Equity and Share-based Payments [Text Block] The Company and Summary of Significant Accounting Policies and Estimates Organization, Consolidation, Basis of Presentation, Business Description and Accounting Policies [Text Block] Leasehold improvements Leasehold Improvements, Gross Canceled (in dollars per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Forfeitures in Period, Weighted Average Exercise Price Stock-based compensation expense Share-based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block] Warranties Standard Product Warranty, Policy [Policy Text Block] Lease expense for leases with initial term of 12 months or less Short-term Lease, Cost Prepaid expenses and other current assets Prepaid expenses and other current assets Prepaid Expense and Other Assets, Current Other Assets Schedule of Other Assets, Noncurrent [Table Text Block] 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 Granted (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Total current assets Assets, Current Entity Current Reporting Status Entity Current Reporting Status U.S. Government bonds US Treasury Securities [Member] Strategic equity investments Strategic Investments, Noncurrent Strategic Investments, Noncurrent NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect Aggregate purchase price Treasury Stock, Value, Acquired, Par Value Method Proceeds from issuance of common stock upon exercise of stock options Proceeds from Stock Options Exercised Unrealized gains (losses) on available-for-sale securities Other Comprehensive Income (Loss), Securities, Available-for-Sale, Unrealized Holding Gain (Loss) Arising During Period, before Tax Common stock Common Stock [Member] CURRENT ASSETS: Assets, Current [Abstract] 2025 Finite-Lived Intangible Assets, Amortization Expense, Year Five Leases [Abstract] Convertible Senior Notes Debt, Policy [Policy Text Block] Debt Instrument [Axis] Debt Instrument [Axis] 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] Strategic convertible debt investment Convertible senior notes Convertible Debt Securities [Member] On or after March 20, 2022 Debt Instrument, Redemption, Period One [Member] Amortization of debt discount and issuance costs Amortization of Debt Issuance Costs and Discounts Vested and expected to vest as of January 31, 2021 Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Remaining Contractual Term Accounts payable Increase (Decrease) in Accounts Payable, Trade Net income (loss) Net income (loss) Net loss Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Product and Service [Axis] Product and Service [Axis] Operating lease cost Operating Lease, Cost Numerator: Net Income (Loss) Available to Common Stockholders, Diluted [Abstract] Entity Small Business Entity Small Business Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Abstract] Acquisition of strategic investments Payments to Acquire Investments Entity Filer Category Entity Filer Category Share-based Compensation Arrangement by Share-based Payment Award, Aggregate Intrinsic Value [Abstract] Share-based Compensation Arrangement by Share-based Payment Award, Aggregate Intrinsic Value [Abstract] Share-based Compensation Arrangement by Share-based Payment Award, Aggregate Intrinsic Value [Abstract] Expected to vest as of January 31, 2020 (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Expected to Vest, Weighted Average Grant Date Fair Value Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Expected to Vest, Weighted Average Grant Date Fair Value Sales of available-for-sale securities Proceeds from Sale of Available-for-sale Securities Other Other Accrued Liabilities, Current Total stock-based compensation expense Share-based Payment Arrangement, Expense Derivative, cap price (in usd per share) Derivative, Cap Price Thereafter Lessee, Operating Lease, Liability, Payments, Due after Year Five TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY Liabilities and Equity Entity Address, City or Town Entity Address, City or Town Income Tax Disclosure [Abstract] Income Tax Disclosure [Abstract] Expected to vest as of January 31, 2020 (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Expected to Vest Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Expected to Vest Balance Sheet Components Supplemental Balance Sheet Disclosures [Text Block] Certificates of deposit Certificates of Deposit [Member] Threshold percentage of stock price trigger Debt Instrument, Convertible, Threshold Percentage of Stock Price Trigger Percentage of Revenue Concentration Risk, Percentage Lease liabilities Non-current portion of lease liabilities Operating Lease, Liability, Noncurrent Operating expenses: Operating Expenses [Abstract] Schedule of Long-term Debt Instruments [Table] Schedule of Long-term Debt Instruments [Table] Decrease in unrecognized tax benefits Unrecognized Tax Benefits, Period Increase (Decrease) Derivative, number of shares covered (in shares) Derivative, Number Of Shares Covered Derivative, Number Of Shares Covered Lease liabilities Increase (Decrease) In Operating Lease, Liability Increase (Decrease) In Operating Lease, Liability STOCKHOLDERS’ EQUITY: Stockholders' Equity Attributable to Parent [Abstract] Deferred costs Deferred Costs, Noncurrent Document Fiscal Year Focus Document Fiscal Year Focus Schedule of Stock by Class [Table] Schedule of Stock by Class [Table] Concentration of Credit Risk Concentration Risk, Credit Risk, Policy [Policy Text Block] Remaining Weighted-Average Useful Life (in years) Finite-Lived Intangible Asset, Useful Life Revenue: Revenues [Abstract] Percentage of Statutory federal income tax rate Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent Vested and expected to vest as of January 31, 2020 (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Number Allowance for accounts receivable Accounts Receivable, Allowance for Credit Loss, Current Schedule of Antidilutive Securities excluded from EPS Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block] Property and equipment pledged as collateral Property and Equipment Pledged as Collateral Property and equipment pledged as collateral. Award Type [Axis] Award Type [Axis] Average price per share (in dollars per share) Treasury Stock Acquired, Average Cost Per Share Impairment of Long-Lived Assets, Intangible Assets, and Goodwill Impairment or Disposal of Long-Lived Assets, Including Intangible Assets, Policy [Policy Text Block] Other income (expense), net Other Nonoperating Income (Expense) Class of Stock [Line Items] Class of Stock [Line Items] Accumulated other comprehensive income (loss) Accumulated Other Comprehensive Income (Loss), Net of Tax Subscription and support Subscription And Support [Member] Subscription And Support Cash payments for operating leases Operating Lease, Payments Geographical [Axis] Geographical [Axis] Property, Plant and Equipment [Table] Property, Plant and Equipment [Table] Adoption of Accounting Standards Update ("ASU") 2018-02 Cumulative Effect, Period Of Adoption, Adjustment [Member] Cumulative Effect, Period Of Adoption, Adjustment Americas North America [Member] Retained Earnings Retained Earnings [Member] Amortization of debt issuance costs Amortization of Debt Issuance Costs Leases Lessee, Operating Leases [Text Block] Accruals for purchase of property and equipment Capital Expenditures Incurred but Not yet Paid Document Period End Date Document Period End Date Statement [Table] Statement [Table] Entity Registrant Name Entity Registrant Name Schedule of convertible debt Convertible Debt [Table Text Block] Deferred revenue, net Contract with Customer, Liability Useful Life Property, Plant and Equipment, Useful Life CASH FLOWS FROM INVESTING ACTIVITIES: Net Cash Provided by (Used in) Investing Activities [Abstract] Partner relationships Partner Relationships [Member] Partner Relationships [Member] Furniture and fixtures Furniture and Fixtures, Gross Maximum Maximum [Member] Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items] Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] Trademarks Trademarks [Member] 2023 Lessee, Operating Lease, Liability, Payments, Due Year Three Schedule Of Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Table] Share-based Payment Arrangement, Expensed and Capitalized, Amount [Table] Share price (in dollars per share) Share Price Weighted Average Remaining Contractual Life Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term Contract costs, noncurrent Contract costs Capitalized Contract Cost, Net, Noncurrent Capitalized software development costs Capitalized Computer Software, Net Schedule of Valuation Assumptions Using Monte Carlo Simulation Model Schedule of Share-based Payment Award, Equity Instruments Other Than Options, Valuation Assumptions [Table Text Block] Schedule of Share-based Payment Award, Equity Instruments Other Than Options, Valuation Assumptions [Table Text Block] Corporate bonds Corporate Bond Securities [Member] Antidilutive Securities Name [Domain] Antidilutive Securities, Name [Domain] Unrecognized tax benefits that would impact tax rate Unrecognized Tax Benefits that Would Impact Effective Tax Rate Accounts Receivables and Allowance for Doubtful Accounts Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block] Retained earnings Retained Earnings (Accumulated Deficit) Conversion notice period Debt Instrument, Convertible, Conversion Notice Period Debt Instrument, Convertible, Conversion Notice Period Accrued Employee Compensation Accrued Employee Compensation [Table Text Block] Accrued employee compensation Repurchase and retirement of common stock Payments for Repurchase of Common Stock Cumulative Effect, Period Of Adoption [Axis] Cumulative Effect, Period Of Adoption [Axis] Cumulative Effect, Period Of Adoption Entity Tax Identification Number Entity Tax Identification Number Other Americas Other Americas [Member] Other Americas [Member] Term license Term License [Member] Term License [Member] Aggregate principal amount Principal Debt Instrument, Face Amount Diluted (in dollars per share) Earnings Per Share, Diluted Unrealized gain (loss) on available-for-sale securities, net of tax Other Comprehensive Income (Loss), Securities, Available-for-Sale, Unrealized Holding Gain (Loss) Arising During Period, after Tax Sales and marketing Selling and Marketing Expense Trading Symbol Trading Symbol Minimum Minimum [Member] Total APAC APAC APAC [Member] APAC [Member] Accounts Receivable and Allowances Accounts Receivable [Policy Text Block] 2022 Finite-Lived Intangible Assets, Amortization Expense, Year Two Foreign currency translation adjustment Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax Bonus Accrued Bonuses, Current Range [Domain] Statistical Measurement [Domain] Gross profit: Gross Profit [Abstract] Schedule of Share-based Compensation, Stock Options, Activity 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 Thereafter Finite-Lived Intangible Assets, Amortization Expense, after Year Five Exercisable as of January 31, 2020 Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value Expected dividend yield Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate Provision for (benefit from) income taxes Income Tax Expense (Benefit) Lessee, Operating Lease, Liability, Payment, Due [Abstract] Lessee, Operating Lease, Liability, Payment, Due [Abstract] Vested and expected to vest as of January 31, 2020 Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Aggregate Intrinsic Value Vesting [Axis] Vesting [Axis] 2022 Lessee, Operating Lease, Liability, Payments, Due Year Two Revenue from Contract with Customer [Abstract] Revenue from Contract with Customer [Abstract] Computer hardware Computer Equipment [Member] Other liabilities Other Liabilities, Noncurrent Tax benefit (expense) on unrealized gains (losses) on available-for-sale securities Other Comprehensive Income (Loss), Securities, Available-for-Sale, Unrealized Holding Gain (Loss) Arising During Period, Tax Percentage of accounts receivable Entity Wide Accounts Receivable Major Customer Percentage Entity wide accounts receivable major customer percentage. City Area Code City Area Code Convertible Senior Notes, 1.250% Convertible Senior Notes, 1.250% [Member] Convertible Senior Notes, 1.250% [Member] Other EMEA Other EMEA [Member] Other EMEA [Member] Prepaid expenses and other assets Increase (Decrease) in Prepaid Expense and Other Assets Intangible assets, net Intangible Assets, Net (Excluding Goodwill) Title of 12(b) Security Title of 12(b) Security Exercisable as of January 31, 2020 (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price Risk-free interest rate Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate Total common stock reserved for issuance (in shares) Total common stock reserved for issuance (in shares) Common Stock, Capital Shares Reserved for Future Issuance Long-term investments Long-term Investments Net income (loss) per share: Earnings Per Share [Abstract] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Asset-backed securities Asset-backed Securities [Member] Cumulative Effect, Period Of Adoption [Domain] Cumulative Effect, Period Of Adoption [Domain] Cumulative Effect, Period Of Adoption Other non-cash items affecting net income (loss) Other Noncash Income (Expense) Property and Equipment Property, Plant and Equipment, Policy [Policy Text Block] Deferred tax assets, net Deferred Income Tax Assets, Net Future Operating Lease Payments Lessee, Operating Lease, Liability, Maturity [Table Text Block] Property and equipment, net by geographic region Schedule of Disclosure on Geographic Areas, Long-Lived Assets in Individual Foreign Countries by Country [Table Text Block] 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 Purchased software Computer Software, Intangible Asset [Member] Accrued employee compensation Increase (Decrease) in Employee Related Liabilities Income (loss) before provision for (benefit from) income taxes Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Customer contracts and related relationships Customer Relationships and Customer Contracts [Member] Customer Relationships and Customer Contracts [Member] Furniture and fixtures Furniture and Fixtures [Member] ASSETS Assets [Abstract] Purchases of available-for-sale securities Payments to Acquire Available-for-sale Securities Beginning balance (in shares) Ending balance (in shares) Shares, Outstanding Number of operating segments Number of Operating Segments Weighted average remaining lease term (years) Operating Lease, Weighted Average Remaining Lease Term Accrued royalties Accrued Royalties, Current Net operating lease cost Lease, Cost Investment owned Investment Owned, at Cost 2023 Finite-Lived Intangible Assets, Amortization Expense, Year Three Future Amortization Expense Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block] CASH FLOWS FROM OPERATING ACTIVITIES: Net Cash Provided by (Used in) Operating Activities [Abstract] Total operating expenses Operating Expenses PSUs Performance Shares [Member] Cost of services revenue Cost of Services Revenues [Member] Cost of Services Revenues [Member] Reimbursement Indemnification Agreement, Reimbursement Paid Indemnification Agreement, Reimbursement Paid Segment Reporting [Abstract] Segment Reporting [Abstract] Less imputed interest Lessee, Operating Lease, Liability, Undiscounted Excess Amount Contract costs, net Capitalized Contract Cost, Net License License [Member] Summary of assumptions for fair value of employee stock option estimates Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract] Issuance of common stock upon exercise of stock options Stock Issued During Period, Value, Stock Options Exercised Net Book Value Finite-Lived Intangible Assets, Net Depreciation and amortization Depreciation, Depletion and Amortization, Nonproduction Total Americas Americas [Member] Accruals for capitalized software costs Capitalized Software Costs Incurred But Not Yet Paid Capitalized Software Costs Incurred But Not Yet Paid Debt Disclosure [Abstract] Debt Disclosure [Abstract] Derivative Instrument [Axis] Derivative Instrument [Axis] Income Statement Location [Domain] Income Statement Location [Domain] Assets and Liabilities, Lessee [Abstract] Assets and Liabilities, Lessee [Abstract] Range [Axis] Statistical Measurement [Axis] Weighted average discount rate Operating Lease, Weighted Average Discount Rate, Percent Unbilled accounts receivable, net 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 Number of Stock Options Outstanding Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] Basis of Presentation and Consolidation Basis of Accounting, Policy [Policy Text Block] Prepaid Expenses and Other Current Assets Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Table Text Block] Number of shares issuable per 1,000 principal converted (in shares) Debt Instrument, Convertible, Number of Shares Issuable Per 1,000 Principal Converted Debt Instrument, Convertible, Number of Shares Issuable Per 1,000 Principal Converted Perpetual license Perpetual License [Member] Perpetual License [Member] Statement of Financial Position [Abstract] Statement of Financial Position [Abstract] Derivative amount Derivative, Notional Amount Debt instrument, redemption, percent Debt Instrument, Redemption Price, Percentage Revenue Recognition Revenue from Contract with Customer [Policy Text Block] Repurchase and retirement of common stock (in shares) Stock Repurchased During Period, Shares Cash paid for income taxes, net of tax refunds Income Taxes Paid, Net Sublease income Sublease Income Convertible Senior Notes Debt Disclosure [Text Block] Write-offs, net Accounts Receivable, Allowance for Credit Loss, Writeoff Capitalized contract cost, amortization period Capitalized Contract Cost, Amortization Period Schedule of Finite-Lived Intangible Assets [Table] Schedule of Finite-Lived Intangible Assets [Table] Salaries, payroll taxes, and benefits Other Payroll Accruals Current Other Payroll Accruals, Current portion Variable lease cost Variable Lease, Cost Capped Call Capped Call [Member] Capped Call [Member] Total Total Available-for-sale Securities Common stock, shares authorized (in shares) Common Stock, Shares Authorized Accumulated Amortization Finite-Lived Intangible Assets, Accumulated Amortization Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Allowance for doubtful accounts Contract with Customer, Asset, Allowance for Credit Loss Entity Central Index Key Entity Central Index Key Balance at beginning of period (in shares) Balance at end of period (in shares) Vesting of restricted stock units (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number Unrecognized Expense Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount Entity Emerging Growth Company Entity Emerging Growth Company Senior Notes Senior Notes [Member] Unrealized Losses Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax Lease liabilities Current portion of lease liabilities Operating Lease, Liability, Current Stock-based compensation Total stock-based compensation expense Share-based Payment Arrangement, Noncash Expense Company's basic and diluted earnings per share Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Derivative [Table] Derivative [Table] Services Services Gross Profit Services gross profit. Computer software Software Development [Member] Income Taxes Income Tax, Policy [Policy Text Block] Accrued employee compensation Accrued employee compensation Employee-related Liabilities, Current 2021 (remainder of fiscal year) Lessee, Operating Lease, Liability, Payments, Remainder of Fiscal Year Prepaid expenses Prepaid Expense, Noncurrent Level 2 Fair Value, Inputs, Level 2 [Member] Income Taxes Income Tax Disclosure [Text Block] Antidilutive Securities Excluded From Computation Of Earnings Per Share By Antidilutive Securities [Axis] Antidilutive Securities [Axis] Deferred revenue Increase (Decrease) in Deferred Revenue Concentration Risk Type [Axis] Concentration Risk Type [Axis] U.S. Government agency securities US Government Agencies Debt Securities [Member] Unbilled accounts receivable, net Contract with Customer, Asset, Net, Noncurrent Unrecognized compensation cost, adjusted for estimated forfeitures Share-based Payment Arrangement, Nonvested Award, Cost [Table Text Block] Number of customers, concentration of credit risk Number of Customers Concentration Of Credit Risk Number of Customers Concentration Of Credit Risk LIABILITIES AND STOCKHOLDERS’ EQUITY Liabilities and Equity [Abstract] Other assets Other Assets Other Assets, Noncurrent CASH FLOWS FROM FINANCING ACTIVITIES: Net Cash Provided by (Used in) Financing Activities [Abstract] Total other comprehensive income (loss) Other Comprehensive Income (Loss), Net of Tax Total Amortization of Debt Issuance Costs and Discounts And Debt Interest Expense Amortization of Debt Issuance Costs and Discounts And Debt Interest Expense Derivative Contract [Domain] Derivative Contract [Domain] Organization, Consolidation and Presentation of Financial Statements [Abstract] Organization, Consolidation and Presentation of Financial Statements [Abstract] Order backlog Order or Production Backlog [Member] Net carrying amount Long-term Debt 2021 (remainder of fiscal year) Finite-Lived Intangible Assets, Amortization Expense, Remainder of Fiscal Year 2024 Finite-Lived Intangible Assets, Amortization Expense, Year Four Vested and expected to vest as of January 31, 2020 (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Exercise Price Fair Value, Measurements, Fair Value Hierarchy [Domain] Fair Value Hierarchy and NAV [Domain] Purchases of property and equipment Payments to Acquire Property, Plant, and Equipment Company Nature of Operations [Policy Text Block] Nature of operations. 2025 Lessee, Operating Lease, Liability, Payments, Due Year Five Aggregate intrinsic value, Nonvested Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Aggregate Intrinsic Value, Nonvested Long-term investments: Available-for-sale Securities, Noncurrent Contract with Customer, Asset and Liability Contract with Customer, Asset and Liability [Table Text Block] Other current liabilities Other Liabilities, Current Net changes to credit losses Accounts Receivable, Credit Loss Expense (Reversal) Operating lease assets Increase (Decrease) In Operating Lease, Right-Of-Use Asset Increase (Decrease) In Operating Lease, Right-Of-Use Asset Weighted Average Expected Recognition Period Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition Additional paid-in capital Additional Paid-in Capital [Member] Revenue Revenue from Contract with Customer [Text Block] Total Long-lived Assets, Property, Plant and Equipment, Net, Including Intangibles and Goodwill Long-lived Assets, Property, Plant and Equipment, Net, Including Intangibles and Goodwill Changes to allowance for credit losses and revenue reserves Net changes to revenue reserves Accounts Receivable, Net Change To Revenue Reserves Accounts Receivable, Net Change To Revenue Reserves Prepaid expenses Prepaid Expense, Current Repurchase and retirement of common stock Stock Repurchased and Retired During Period, Value Stock-Based Compensation Share-based Payment Arrangement [Policy Text Block] Accounts Receivable Accounts Receivable [Member] United States UNITED STATES Stated interest rate Debt Instrument, Interest Rate, Stated Percentage Entity Address, Address Line One Entity Address, Address Line One Stockholders' Equity and Stock-based Compensation [Abstract] Stockholders' Equity and Stock-based Compensation [Abstract] Stockholders' equity and stock-based compensation. Total property and equipment Property, Plant and Equipment, Gross Contract costs, current Contract costs Capitalized Contract Cost, Net, Current Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets by Major Class [Axis] Total gross profit Gross Profit Geographical [Domain] Geographical [Domain] Entity Address, State or Province Entity Address, State or Province Income Statement Location [Axis] Income Statement Location [Axis] Less than 12 Months Available For Sale Securities, Debt Maturities Current Available For Sale Securities, Debt Maturities Current Customer Concentration Risk Customer Concentration Risk [Member] Investments Classified by Contractual Maturity Date Investments Classified by Contractual Maturity Date [Table Text Block] Weighted Average Weighted Average [Member] Tranche One Share-based Payment Arrangement, Tranche One [Member] Net cash provided by (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] Tranche two Share-based Payment Arrangement, Tranche Two [Member] Capitalized software development costs Payments to Develop Software Aggregate intrinsic value, Expected to vest Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Aggregate Intrinsic Value, Expected to Vest Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Aggregate Intrinsic Value, Expected to Vest General and administrative General and Administrative Expense Accounts payable Accounts Payable, Current Share-based compensation expense Share Based Compensation Expense, Performance Based Awards Share Based Compensation Expense, Performance Based Awards recognized in period Other current liabilities Accrued Liabilities, Current Entity Interactive Data Current Entity Interactive Data Current 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 Accounts receivable Accounts Receivable, before Allowance for Credit Loss Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Balance at beginning of period (in dollars per share) Balance at end of period (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities: Adjustments, Noncash Items, to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Net Income (Loss) Per Share Earnings Per Share [Text Block] Shares available under stock plans (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant Conversion price (in dollars per share) Debt Instrument, Convertible, Conversion Price Less accumulated depreciation Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Equity Award [Domain] Award Type [Domain] On or after October 15, 2024 Debt Instrument, Redemption, Period Two [Member] Unrealized Gains Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Foreign currency translation adjustments Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss) Arising During Period, Net of Tax Award vesting percentage Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage Vacation Accrued Vacation, Current Revenue Benchmark Revenue Benchmark [Member] Exercisable as of January 31, 2021 Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Weighted Average Remaining Contractual Term Restricted Stock Units (RSUs) Stock Awards Restricted Stock Units (RSUs) [Member] Research and development Research and Development Expense [Member] Software Development Costs Research, Development, and Computer Software, Policy [Policy Text Block] Effective income tax rate, continuing operations Effective Income Tax Rate Reconciliation, Percent Disaggregation of Revenue [Table] Disaggregation of Revenue [Table] License License Gross Profit License gross profit. Purchased software Capitalized Computer Software, Gross Fair value of debt Long-term Debt, Fair Value Other Current Liabilities Other Current Liabilities [Table Text Block] Cost of revenue: Cost of Revenue [Abstract] 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 Unbilled accounts receivable Increase (Decrease) in Contract with Customer, Asset Reclassification Reclassification, Policy [Policy Text Block] Common stock Common Stock, Value, Issued Impairment loss Strategic Investment, Impairment Loss Strategic Investment, Impairment Loss Average expected volatility of the peer companies in the S&P Index Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate of Peer Companies in Index Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate of Peer Companies in Index Maturities of available-for-sale securities Proceeds from Maturities, Prepayments and Calls of Debt Securities, Available-for-sale Sales and marketing Selling and Marketing Expense [Member] Deferred income tax Deferred Income Taxes and Tax Credits Research and development Research and Development Expense Vesting [Domain] Vesting [Domain] Statement of Comprehensive Income [Abstract] Statement of Comprehensive Income [Abstract] Denominator: Weighted Average Number of Shares Outstanding, Basic [Abstract] Cost of license revenue Cos Of License Revenues [Member] Cos Of License Revenues Basic (in shares) Weighted Average Number of Shares Outstanding, Basic Operating lease assets Decrease in operating lease 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 [Axis] Equity Components [Axis] Weighted Average Grant Date Fair Value Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract] Equipment and machinery Machinery and Equipment, Gross Cash and Cash Equivalents [Domain] Cash and Cash Equivalents [Domain] Total stockholders’ equity Beginning balance Ending balance Stockholders' Equity Attributable to Parent Amortization expense Amortization of Intangible Assets Concentration Risk Type [Domain] Concentration Risk Type [Domain] Finite-Lived Intangible Assets, Major Class Name [Domain] Finite-Lived Intangible Assets, Major Class Name [Domain] Other liabilities Increase (Decrease) in Other Operating Liabilities SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION: Supplemental Cash Flow Elements [Abstract] Canceled (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period Deferred revenue, net Contract with Customer, Liability, Current Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Axis] Amortization of premium (accretion of discount) on available-for-sale securities, net Accretion (Amortization) of Discounts and Premiums, Investments Convertible Debt Convertible Debt [Member] Acquired technology Technology-Based Intangible Assets [Member] Fair Value of Financial Instruments Fair Value Disclosures [Text Block] Finite-Lived Intangible Assets [Line Items] Finite-Lived Intangible Assets [Line Items] Components of Lease Cost Lease, Cost [Table Text Block] Unbilled accounts receivable, net Contract with Customer, Asset, Net, Current Total EMEA EMEA EMEA [Member] Cost Finite-Lived Intangible Assets, Gross Cash paid for interest Interest Paid, Excluding Capitalized Interest, Operating Activities Debt Instrument, Redemption, Period [Axis] Debt Instrument, Redemption, Period [Axis] Allowance for credit losses and revenue reserves Balance as of July 31, 2020 Balance as of January 31, 2021 Accounts Receivable, Allowance for Credit Loss Cash equivalents: Cash and Cash Equivalents, Fair Value Disclosure Security Exchange Name Security Exchange Name Antidilutive securities excluded from EPS (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Depreciation Depreciation Supplemental Cash And Non-Cash Information Supplemental Cash And Non-Cash Information, Lessee [Table Text Block] Supplemental Cash And Non-Cash Information, Lessee Long-term Debt, Type [Axis] Long-term Debt, Type [Axis] Additional paid-in capital Additional Paid in Capital, Common Stock Aggregate intrinsic value, Vested Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Aggregate Intrinsic Value, Vested Net cash provided by (used in) operating activities Net Cash Provided by (Used in) Operating Activities Number of Stock Awards Outstanding Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] Schedule of Available-for-sale Securities Reconciliation Schedule of Available-for-sale Securities Reconciliation [Table Text Block] Equity Component [Domain] Equity Component [Domain] Expected term (in years) Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term Revenue, performance obligations, timing Revenue, Performance Obligation, Description of Timing Document Transition Report Document Transition Report Stock options Stock options Share-based Payment Arrangement, Option [Member] TSR PSUs Total Shareholder Return Performance Shares (TSR PSUs) [Member] Total Shareholder Return Performance Shares (TSR PSUs) [Member] Subscription and support Subscription And Support Gross Profit Subscription And Support Gross Profit Debt issuance costs Debt Issuance Costs, Net Short-term investments Short-term Investments Authorized repurchase amount Stock Repurchase Program, Authorized Amount Allowance for Doubtful Accounts Receivable [Roll Forward] Accounts Receivable, Allowance for Credit Loss [Roll Forward] Income Statement [Abstract] Income Statement [Abstract]