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Exchange Name Cash flows from operating activities Net Cash Provided by (Used in) Operating Activities [Abstract] Intangible assets, net Intangible Assets, Net (Excluding Goodwill) Capitalization Stockholders' Equity Note Disclosure [Text Block] Accounts receivable Accounts Receivable [Member] Short-term investments Debt Securities, Held-to-maturity, Fair Value Sales and marketing Selling and Marketing Expense [Member] Income (loss) from operations Operating Income (Loss) Customer [Domain] Customer [Domain] Cumulative Effect, Period of Adoption, Adjustment Cumulative Effect, Period of Adoption, Adjustment [Member] Total current liabilities Liabilities, Current Additional paid-in capital Additional Paid in Capital, Common Stock Entity Registrant Name Entity Registrant Name Employee severance and related costs Severance Costs Subsequent Event Type [Domain] Subsequent Event Type [Domain] Contract with Customer, Asset and Liability Contract with Customer, Contract Asset, Contract Liability, and Receivable [Table Text Block] Statement of Stockholders' Equity [Abstract] Statement of Stockholders' Equity [Abstract] Market performance shares Performance Shares [Member] Concentration Risk [Line Items] Concentration Risk [Line Items] Non-vested, beginning balance (in dollars per share) Non-vested, ending balance (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value Other liabilities Increase (Decrease) in Other Operating Liabilities Schedule of Error Corrections and Prior Period Adjustment Restatement [Table] Schedule of Error Corrections and Prior Period Adjustment Restatement [Table] Commitments and contingencies Commitments and Contingencies Repurchase of common stock Payments for Repurchase of Common Stock ASSETS Assets: Assets [Abstract] Service period Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period 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Retained Earnings (Accumulated Deficit) Maximum potential to vest (in shares) Share-Based Compensation Arrangement By Share-Based Payment Award, Equity Instruments Other Than Options, Maximum Number Of Shares To Vest Share-Based Compensation Arrangement By Share-Based Payment Award, Equity Instruments Other Than Options, Maximum Number Of Shares To Vest Operating lease assets Operating Lease, Right-of-Use Asset Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Goodwill impairment Goodwill, Impairment Loss Depreciation and amortization Depreciation, Depletion and Amortization, Nonproduction Balance at beginning of period Balance at end of period Restructuring Reserve Operating lease assets and liabilities, net Increase (Decrease) In Operating Lease, Right-Of-Use Asset And Liability, Net Increase (Decrease) In Operating Lease, Right-Of-Use Asset And Liability, Net Operating lease impairment loss, number of leases Operating Lease, Impairment Loss, 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Tax, Portion Attributable to Parent Preferred stock, $0.01 par value: 50,000 shares authorized, no shares issued and outstanding Preferred Stock, Value, Issued Payments Payments for Restructuring Goodwill Goodwill Total operating expenses Operating Expenses Increase, net Increase (Decrease) In Unbilled Receivables, Noncurrent Increase (Decrease) In Unbilled Receivables, Noncurrent Other comprehensive income (loss): Other Comprehensive Income (Loss), Net of Tax [Abstract] Document Transition Report Document Transition Report Common stock, par value (in dollars per share) Common Stock, Par or Stated Value Per Share Other liabilities Other Liabilities, Noncurrent Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] Stock-based compensation APIC, Share-based Payment Arrangement, Increase for Cost Recognition Other Professional Services Professional Services, Other [Member] Professional Services, Other [Member] Level 2 Fair Value, Inputs, Level 2 [Member] Effects of exchange rate — changes in cash Effect of Exchange Rate on Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents Other current assets Other Assets, Current Document Quarterly Report Document Quarterly Report Opening Balance as of March 31, 2020 Ending Balance as of December 31, 2020 Unbilled Receivables, Current Total revenues Total Revenue Revenue from Contract with Customer, Excluding Assessed Tax General and administrative General and Administrative Expense [Member] Equity [Abstract] Equity [Abstract] Trade accounts receivable Increase (Decrease) in Receivables EMEA EMEA [Member] Customer support agreement term Customer Support Agreement The typical length of Customer Support Agreements. Concentration risk percentage Concentration Risk, Percentage Deferred Revenue (long-term) Contract With Customer, Liability, Noncurrent [Roll Forward] Contract With Customer, Liability, Noncurrent [Roll Forward] Geographical [Domain] Geographical [Domain] Deferred revenue Opening Balance as of March 31, 2020 Ending Balance as of December 31, 2020 Contract with Customer, Liability, Current Subsequent Event [Line Items] Subsequent Event [Line Items] Accounting Standards Update [Extensible List] Accounting Standards Update [Extensible List] Cumulative Effect, Period of Adoption [Axis] Cumulative Effect, Period of Adoption [Axis] Customer Concentration Risk Customer Concentration Risk [Member] Statement [Line Items] Statement [Line Items] Diluted (in shares) Diluted weighted average shares outstanding (in shares) Weighted Average Number of Shares Outstanding, Diluted Basic (in dollars per share) Basic net income (loss) per common share (in dollars per share) Earnings Per Share, Basic Performance obligation, expected payment terms Revenue, Performance Obligation, Description Of Payment Terms, Period Revenue, Performance Obligation, Description Of Payment Terms, Period Number of operating segments Number of Operating Segments Entity File Number Entity File Number Forfeited (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period Sales and marketing Selling and Marketing Expense Statement [Table] Statement [Table] Number of annual tranches Share-Based Compensation Arrangement By Share-Based Payment Award, Number Of Annual Tranches Share-Based Compensation Arrangement By Share-Based Payment Award, Number Of Annual Tranches Short-term investments Debt Securities, Held-to-maturity, Current Software, appliances Software, Appliances [Member] Software, Appliances [Member] Deferred Revenue (current) Contract With Customer, Liability, Current [Roll Forward] Contract with Customer, Liability, Current [Roll Forward] Preferred stock, shares issued (in shares) Preferred Stock, Shares Issued Net cash used in financing activities Net Cash Provided by (Used in) Financing Activities Sources of primary revenue Sources Of Primary Revenue The number of sources of revenue in a typical sales agreement. Revenue expected to be recognized from remaining performance obligations Revenue, Remaining Performance Obligation, Amount Compensation expense Share-based Payment Arrangement, Expense Restructuring and Related Activities [Abstract] Restructuring and Related Activities [Abstract] Opening Balance as of March 31, 2020 Ending Balance as of December 31, 2020 Unbilled Receivables, Noncurrent Unbilled Receivables, Noncurrent Common stock, $0.01 par value: 250,000 shares authorized, 46,835 shares and 46,011 shares issued and outstanding at December 31, 2020 and March 31, 2020, respectively Common Stock, Value, Issued Deferred commissions cost Capitalized Contract Cost, Net, Noncurrent Goodwill and Intangible Assets Disclosure [Abstract] Goodwill and Intangible Assets Disclosure [Abstract] Finite-Lived Intangible Assets [Line Items] Finite-Lived Intangible Assets [Line Items] Impairment of intangible asset Impairment Charge Impairment of Intangible Assets, Finite-lived Document Fiscal Year Focus Document Fiscal Year Focus Entity Small Business Entity Small Business Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Restricted cash Restricted Cash, Current Software, licenses Software, Licenses [Member] Software, Licenses [Member] Entity Current Reporting Status Entity Current Reporting Status Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] Amendment Flag Amendment Flag Subsequent Event [Table] Subsequent Event [Table] Schedule of Earnings Per Share, Basic and Diluted Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Share issuances related to stock-based compensation (in shares) Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture Weighted average common shares outstanding: Weighted Average Number of Shares Outstanding, Diluted [Abstract] Finite-Lived Intangible Assets, Major Class Name [Domain] Finite-Lived Intangible Assets, Major Class Name [Domain] Awarded (in dollars per share) Weighted-average fair value, units awarded (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 Cash flows from investing activities Net Cash Provided by (Used in) Investing Activities [Abstract] Common stock, shares issued (in shares) Common Stock, Shares, Issued Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Net cash provided by operating activities Net Cash Provided by (Used in) Operating Activities Entity Central Index Key Entity Central Index Key Restructuring Restructuring and Related Activities Disclosure [Text Block] Opening Balance as of March 31, 2020 Ending Balance as of December 31, 2020 Accounts Receivable, after Allowance for Credit Loss Increase, net Increase (Decrease) in Accounts Receivable Statement of Comprehensive Income [Abstract] Statement of Comprehensive Income [Abstract] Total stockholders’ equity Beginning balance Ending balance Stockholders' equity Stockholders' Equity Attributable to Parent Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets by Major Class [Axis] Concentration Risk Type [Domain] Concentration Risk Type [Domain] Total liabilities and stockholders’ equity Liabilities and Equity Accumulated other comprehensive loss Accumulated Other Comprehensive Income (Loss), Net of Tax Income Taxes Income Tax Disclosure [Text Block] Entity Address, City or Town Entity Address, City or Town Geographical [Axis] Geographical [Axis] Fair Value, Hierarchy Fair Value Hierarchy and NAV [Axis] Restricted stock units Restricted Stock Units (RSUs) [Member] Maximum employee payroll percent deduction of salary Share-based Compensation Arrangement by Share-based Payment Award, Maximum Employee Subscription Rate General and administrative General and Administrative Expense Stock-based compensation Other Restructuring Costs Antidilutive securities excluded from computation (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Current tax benefit Current Income Tax Expense (Benefit) Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Employee Stock Employee Stock [Member] Equity Component [Domain] Equity Component [Domain] Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs, by Report Line Income Statement Location [Axis] Share issuances related to business combination Stock Issued During Period, Value, Acquisitions Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Adjustment of current income tax benefit Income Tax Expense (Benefit), Continuing Operations, Adjustment of Deferred Tax (Asset) Liability Cost of services revenue Cost Of Services Revenue [Member] Cost of services revenue Member. Income Statement Location [Domain] Income Statement Location [Domain] Gross margin Gross Profit Cash flows from financing activities Net Cash Provided by (Used in) Financing Activities [Abstract] Property and equipment, net Property, Plant and Equipment, Net Entity Tax Identification Number Entity Tax Identification Number Revenue Revenue from Contract with Customer [Policy Text Block] Amortization of intangible assets Amortization of Intangible Assets Stock Plans Share-based Payment Arrangement [Text Block] Net income (loss) Net income (loss) Net income (loss) Net loss Net Income (Loss) Attributable to Parent Changes in operating assets and liabilities: Increase (Decrease) in Operating Capital [Abstract] Other assets Other Assets, Noncurrent Trade accounts receivable, net Receivables, Net, Current Concentration Risk [Table] Concentration Risk [Table] Total assets Assets Total current assets Assets, Current Current Fiscal Year End Date Current Fiscal Year End Date Operating expenses: Operating Expenses [Abstract] Net income (loss) per common share: Earnings Per Share [Abstract] Restructuring Total restructuring charges Restructuring Charges Non-vested, beginning balance (in shares) Non-vested, ending balance (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number Title of 12(b) Security Title of 12(b) Security Net Carrying Value Finite-Lived Intangible Assets, Net Subsequent Event Type [Axis] Subsequent Event Type [Axis] Stockholders’ equity: Stockholders' Equity Attributable to Parent [Abstract] Developed technology Developed Technology Rights [Member] Concentration of Credit Risk Concentration Risk, Credit Risk, Policy [Policy Text Block] Proceeds from maturity of short-term investments Proceeds from Sale of Short-term Investments Document Fiscal Period Focus Document Fiscal Period Focus Professional Services, education services Professional Services, Education Services [Member] Professional Services, Education Services [Member] Percentage of free cash flow used for additional stock repurchases Stock Repurchase Program, Percentage Of Free Cash Flow Used For Additional Repurchases Stock Repurchase Program, Percentage Of Free Cash Flow Used For Additional Repurchases Depreciation and amortization Depreciation, Depletion and Amortization Recently Adopted Accounting Standards and Recently Issued Accounting Standards Not Yet Adopted Accounting Standards Update and Change in Accounting Principle [Table Text Block] Product and Service [Axis] Product and Service [Axis] Deferred revenue, less current portion Opening Balance as of March 31, 2020 Ending Balance as of December 31, 2020 Contract with Customer, Liability, Noncurrent Deferred commissions cost Increase (Decrease) In Deferred Sales Commissions Increase (Decrease) in Deferred Sales Commissions Weighted average period awards are expected to be recognized Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition Number of shares purchased by employees (in shares) Stock Issued During Period, Shares, Employee Stock Purchase Plans Entity Filer Category Entity Filer Category Schedule of Stock-Based Compensation Expense Share-based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block]   Common Stock Common Stock [Member] Product and Service [Domain] Product and Service [Domain] Increase, net Contract With Customer, Liability, Noncurrent, Increase (Decrease) Contract With Customer, Liability, Noncurrent, Increase (Decrease) Concentration Risk Benchmark [Domain] Concentration Risk Benchmark [Domain] Revenue recognized in period, included in opening deferred revenue balance Contract with Customer, Liability, Revenue Recognized Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Abstract] Level 1 Fair Value, Inputs, Level 1 [Member] Fair Value, Recurring and Nonrecurring [Table] Fair Value, Recurring and Nonrecurring [Table] Accounts payable Increase (Decrease) in Accounts Payable Number of Awards Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] Gross Carrying Amount Finite-Lived Intangible Assets, Gross Revenue Revenue Benchmark [Member] Additional Paid – In Capital Additional Paid-in Capital [Member] Disaggregation of Revenue [Line Items] Disaggregation of Revenue [Line Items] Accrued liabilities Increase (Decrease) in Accrued Liabilities Diluted net loss per common share: Earnings Per Share, Diluted [Abstract] Adjustments to reconcile net loss to net cash provided by operating activities: Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] 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 Revenues: Revenue from Contract with Customer [Abstract] Software and products Software And Products [Member] Software And Products [Member] Error Corrections and Prior Period Adjustments Restatement [Line Items] Error Corrections and Prior Period Adjustments Restatement [Line Items] Fair Value of Financial Instruments Fair Value of Financial Instruments, Policy [Policy Text Block] Common stock, shares outstanding (in shares) Common Stock, Shares, Outstanding Income Tax Disclosure [Abstract] Income Tax Disclosure [Abstract] Software and Products Revenue Software and Products Revenue Software [Member] Software [Member] Basis of Presentation Basis of Accounting, Policy [Policy Text Block] Basic (in shares) Basic weighted average shares outstanding (in shares) Weighted Average Number of Shares Outstanding, Basic Income (loss) before income taxes Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Research and development Research and Development Expense Subsequent Event Subsequent Event [Member] Business combination, net of cash acquired Payments to Acquire Businesses, Net of Cash Acquired Common stock, shares authorized (in shares) Common Stock, Shares Authorized Concentration Risk Type [Axis] Concentration Risk Type [Axis] Dilutive effect of stock options and restricted stock units (in shares) Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements Increase, net Contract With Customer, Liability, Current, Increase (Decrease) Contract With Customer, Liability, Current, Increase (Decrease) Revenue Revenue from Contract with Customer [Text Block] Basis of Presentation Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] Amortization of deferred commissions cost Amortization of Deferred Sales Commissions Income tax expense Income tax expense (benefit) Income Tax Expense (Benefit) Income Statement [Abstract] Income Statement [Abstract] Schedule of Restricted Stock Unit Activity Schedule of Nonvested Restricted Stock Units Activity [Table Text Block] Cash, cash equivalents and restricted cash at beginning of period Cash, cash equivalents and restricted cash at end of period Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents Accumulated Other Comprehensive Loss AOCI Attributable to Parent [Member] Long-term operating lease liabilities Operating Lease, Liability, Noncurrent Accrued liabilities Accrued Liabilities, Current Diluted (in dollars per share) Diluted net income (loss) per common share (in dollars per share) Earnings Per Share, Diluted Local Phone Number Local Phone Number Americas Americas [Member] Cumulative Effect, Period of Adoption [Domain] Cumulative Effect, Period of Adoption [Domain] Offering period Share-based Compensation Arrangement By Share-based Payment Award, Offering Period Share-based Compensation Arrangement By Share-based Payment Award, Offering Period Use of Estimates Use of Estimates, Policy [Policy Text Block] Current assets: Assets, Current [Abstract] Purchased Intangible Assets, Net of Amortization Schedule of Finite-Lived Intangible Assets Acquired as Part of Business Combination [Table Text Block] Interest income Investment Income, Interest Accounts Receivable Accounts Receivable [Roll Forward] Accounts Receivable [Roll Forward] Entity Address, Address Line One Entity Address, Address Line One Arrow Arrow [Member] Arrow [Member] Remaining amount available under share repurchase program Stock Repurchase Program, Remaining Authorized Repurchase Amount Other current assets and Other assets Increase (Decrease) in Other Operating Assets Entity Emerging Growth Company Entity Emerging Growth Company Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table] Schedule of Finite-Lived Intangible Assets [Table] Schedule of Finite-Lived Intangible Assets [Table] Comprehensive income (loss) Comprehensive Income (Loss), Net of Tax, Attributable to Parent Preferred stock, par value (in dollars per share) Preferred Stock, Par or Stated Value Per Share Restructuring Reserve [Roll Forward] Restructuring Reserve [Roll Forward] Award Type [Axis] Award Type [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] Accumulated Amortization Finite-Lived Intangible Assets, Accumulated Amortization APJ Asia Pacific [Member] Purchase of property and equipment Payments to Acquire Property, Plant, and Equipment City Area Code City Area Code Preferred stock, shares authorized (in shares) Preferred Stock, Shares Authorized Document Period End Date Document Period End Date Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] Purchase of short-term investments Payments to Acquire Short-term Investments Accumulated Deficit Retained Earnings [Member] Goodwill and Intangible Assets, Net Goodwill and Intangible Assets Disclosure [Text Block] Preferred stock, shares outstanding (in shares) Preferred Stock, Shares Outstanding Other Services Revenue Service, Other [Member] 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] Summary of Significant Accounting Policies Significant Accounting Policies [Text Block] Net cash provided by (used in) investing activities Net Cash Provided by (Used in) Investing Activities Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Share repurchase program, amount approved Stock Repurchase Program, Authorized Amount Award Type [Domain] Award Type [Domain] Disaggregation of Revenue Disaggregation of Revenue [Table Text Block] Trading Symbol Trading Symbol Disaggregation of Revenue [Table] Disaggregation of Revenue [Table] Financial Assets Measured at Fair Value Fair Value, Assets Measured on Recurring and Nonrecurring Basis [Table Text Block] Impairment of operating lease assets Lease impairments and related costs Operating Lease, Impairment Loss Maximum amount of stock purchasable by employees within a calendar year Share based Compensation Arrangement by Share based Payment Award Maximum Annual Purchases Per Employee Amount Share based Compensation Arrangement by Share based Payment Award Maximum Annual Purchases Per Employee Amount Cost of revenues: Cost of Goods and Services Sold [Abstract] Proceeds from stock-based compensation plans Proceeds, Issuance of Shares, Share-based Payment Arrangement, Including Option Exercised Noncash stock-based compensation Stock-based compensation expense Share-based Payment Arrangement, Noncash Expense Repurchase of common stock Repurchase of common stock Stock Repurchased During Period, Value Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table Text Block] Net Income per Common Share Earnings Per Share [Text Block] Cover [Abstract] Cover [Abstract] Restructuring and Related Costs Restructuring and Related Costs [Table Text Block] Goodwill addition Goodwill, Acquired During Period Current liabilities: Liabilities, Current [Abstract] Entity Shell Company Entity Shell Company Customer Support Revenue Customer Support [Member] Customer Support [Member] Recently Issued Accounting Standards New Accounting Pronouncements, Policy [Policy Text Block] Statement of Financial Position [Abstract] Statement of Financial Position [Abstract] Basic net income (loss) per common share: Earnings Per Share, Basic [Abstract]