Equity [Abstract] Capitalization Capitalization [Text Block] Entities disclosure for capitalization. Revenue from Contract with Customer [Abstract] Revenue Revenue from Contract with Customer [Text Block] Statement of Comprehensive Income [Abstract] Net loss Net Income (Loss) Attributable to Parent Other comprehensive loss: Other Comprehensive Income (Loss), Net of Tax [Abstract] Foreign currency translation adjustment Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax Comprehensive loss Comprehensive Income (Loss), Net of Tax, Attributable to Parent Income Statement [Abstract] Statement [Table] Statement [Table] Product and Service [Axis] Product and Service [Axis] Product and Service [Domain] Product and Service [Domain] Software and products Software And Products [Member] Software And Products [Member] Services Service [Member] Statement [Line Items] Statement [Line Items] Revenues: Total revenues Revenue from Contract with Customer, Excluding Assessed Tax Cost of revenues: Cost of Goods and Services Sold [Abstract] Total cost of revenues Cost of Goods and Services Sold Gross margin Gross Profit Operating expenses: Operating Expenses [Abstract] Sales and marketing Selling and Marketing Expense Research and development Research and Development Expense General and administrative General and Administrative Expense Restructuring Restructuring and Related Cost, Incurred Cost Depreciation and amortization Depreciation, Depletion and Amortization, Nonproduction Total operating expenses Operating Expenses Loss from operations Operating Income (Loss) Interest income Investment Income, Interest Loss before income taxes Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Income tax expense Income Tax Expense (Benefit) Net loss Net loss per common share: Earnings Per Share [Abstract] Basic (in dollars per share) Earnings Per Share, Basic Diluted (in dollars per share) Earnings Per Share, Diluted Weighted average common shares outstanding: Weighted Average Number of Shares Outstanding, Diluted [Abstract] Basic (in shares) Weighted Average Number of Shares Outstanding, Basic Diluted (in shares) Weighted Average Number of Shares Outstanding, Diluted Accounting Policies [Abstract] Summary of Significant Accounting Policies Significant Accounting Policies [Text Block] Operating Lease Cost Operating Lease, Cost Short-term Lease Cost Short-term Lease, Cost Variable Lease Cost Variable Lease, Cost Net Lease Cost Lease, Cost Share-based Payment Arrangement [Abstract] Stock Plans Share-based Payment Arrangement [Text Block] Concentration Risk [Table] Concentration Risk [Table] Concentration Risk Type [Axis] Concentration Risk Type [Axis] Concentration Risk Type [Domain] Concentration Risk Type [Domain] Customer Concentration Risk Customer Concentration Risk [Member] Customer [Axis] Customer [Axis] Customer [Domain] Customer [Domain] Arrow Arrow [Member] Arrow [Member] Avent Avent Technology Solutions [Member] Avent Technology Solutions [Member] Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Domain] Concentration Risk Benchmark [Domain] Revenue Revenue Benchmark [Member] Accounts receivable Accounts Receivable [Member] Concentration Risk [Line Items] Concentration Risk [Line Items] Concentration risk percentage Concentration Risk, Percentage Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Award Type [Axis] Award Type [Axis] Award Type [Domain] Award Type [Domain] Stock options and restricted stock units Stock Options and Restricted Stock Units [Member] Stock Options and Restricted Stock Units [Member] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Unrecognized stock-based compensation expense, net of estimated forfeitures Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount Weighted average period awards are expected to be recognized Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition Net Income per Common Share Earnings Per Share [Text Block] New Accounting Pronouncements or Change in Accounting Principle [Table] New Accounting Pronouncements or Change in Accounting Principle [Table] Adjustments for New Accounting Pronouncements [Axis] Adjustments for New Accounting Pronouncements [Axis] Type of Adoption [Domain] Type of Adoption [Domain] ASU 2016-02 Accounting Standards Update 2016-02 [Member] New Accounting Pronouncements or Change in Accounting Principle [Line Items] New Accounting Pronouncements or Change in Accounting Principle [Line Items] Operating lease assets Operating Lease, Right-of-Use Asset Operating lease liabilities Operating Lease, Liability Additions of operating lease assets Increase (Decrease) In Operating Lease, Right Of Use Asset Increase (Decrease) in Operating Lease, Right Of Use Asset Weighted-average remaining operating lease term Operating Lease, Weighted Average Remaining Lease Term Weighted-average discount rate, operating leases Operating Lease, Weighted Average Discount Rate, Percent Net Lease Cost Recognized on Condensed Consolidated Statement of Operations Lease, Cost [Table Text Block] Financial Assets Measured at Fair Value Fair Value, Assets Measured on Recurring and Nonrecurring Basis [Table Text Block] Maturities of Lease Liabilities Lessee, Operating Lease, Liability, Maturity [Table Text Block] Schedule of Stock by Class [Table] Schedule of Stock by Class [Table] Share Repurchase Program [Axis] Share Repurchase Program [Axis] Share Repurchase Program [Domain] Share Repurchase Program [Domain] Common stock repurchase program Common Stock Repurchase Program [Member] Common Stock Repurchase Program [Member] Class of Stock [Line Items] Class of Stock [Line Items] Remaining amount available under share repurchase program Stock Repurchase Program, Remaining Authorized Repurchase Amount Statement of Stockholders' Equity [Abstract] Equity Components [Axis] Equity Components [Axis] Equity Component [Domain] Equity Component [Domain] Common Stock Common Stock [Member] Additional Paid – In Capital Additional Paid-in Capital [Member] Accumulated Deficit Retained Earnings [Member] Accumulated Other Comprehensive Loss AOCI Attributable to Parent [Member] Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Beginning balance (in shares) Shares, Outstanding Beginning balance Stockholders' Equity Attributable to Parent Stock-based compensation APIC, Share-based Payment Arrangement, Increase for Cost Recognition Share issuances related to stock-based compensation (in shares) Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture Share issuances related to stock-based compensation Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture Repurchase of common stock (in shares) Stock Repurchased During Period, Shares Repurchase of common stock Stock Repurchased During Period, Value Net loss Other comprehensive loss Ending balance (in shares) Ending balance Restricted stock units Restricted Stock Units (RSUs) [Member] Number of Awards Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] Non-vested (in shares) as of March 31, 2019 Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number Awarded (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period Vested (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period Forfeited (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period Non-vested (in shares) as of June 30, 2019 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] Non-vested (in dollars per share) as of March 31, 2019 Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value 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 Vested (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 Forfeited (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 Non-vested (in dollars per share) as of June 30, 2019 Antidilutive securities excluded from computation (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Basis of Presentation Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] Weighted average fair value, units awarded (in dollars per share) Statement of Financial Position [Abstract] ASSETS Assets [Abstract] Current assets: Assets, Current [Abstract] Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Short-term investments Debt Securities, Held-to-maturity, Current Trade accounts receivable Receivables, Net, Current Other current assets Other Assets, Current Total current assets Assets, Current Property and equipment, net Property, Plant and Equipment, Net Deferred commissions cost Capitalized Contract Cost, Net, Noncurrent Other assets Other Assets, Noncurrent Total assets Assets LIABILITIES AND STOCKHOLDERS’ EQUITY Liabilities and Equity [Abstract] Current liabilities: Liabilities, Current [Abstract] Accounts payable Accounts Payable, Current Accrued liabilities Accrued Liabilities, Current Current portion of operating lease liabilities Operating Lease, Liability, Current Deferred revenue Contract with Customer, Liability, Current Total current liabilities Liabilities, Current Deferred revenue, less current portion Contract with Customer, Liability, Noncurrent Deferred tax liabilities, net Deferred Tax Liabilities, Net Long-term operating lease liabilities Operating Lease, Liability, Noncurrent Other liabilities Other Liabilities, Noncurrent Commitments and contingencies Commitments and Contingencies Stockholders’ equity: Stockholders' Equity Attributable to Parent [Abstract] Preferred stock, $0.01 par value: 50,000 shares authorized, no shares issued and outstanding at June 30, 2019 and March 31, 2019 Preferred Stock, Value, Issued Common stock, $0.01 par value: 250,000 shares authorized, 45,077 shares and 45,582 shares issued and outstanding at June 30, 2019 and March 31, 2019, respectively Common Stock, Value, Issued Additional paid-in capital Additional Paid in Capital, Common Stock Accumulated deficit Retained Earnings (Accumulated Deficit) Accumulated other comprehensive loss Accumulated Other Comprehensive Income (Loss), Net of Tax Total stockholders’ equity Total liabilities and stockholders’ equity Liabilities and Equity Cover page. Document Type Document Type Amendment Flag Amendment Flag Document Period End Date Document Period End Date Document Fiscal Year Focus Document Fiscal Year Focus Document Fiscal Period Focus Document Fiscal Period Focus Entity Registrant Name Entity Registrant Name Entity Central Index Key Entity Central Index Key Entity Current Reporting Status Entity Current Reporting Status Entity Interactive Data Current Entity Interactive Data Current Current Fiscal Year End Date Current Fiscal Year End Date Entity Filer Category Entity Filer Category Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Entity Shell Company Entity Shell Company Entity Small Business Entity Small Business Entity Emerging Growth Company Entity Emerging Growth Company Title of 12(b) Security Title of 12(b) Security Trading Symbol Trading Symbol Security Exchange Name Security Exchange Name Entity File Number Entity File Number Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Entity Tax Identification Number Entity Tax Identification Number Entity Address, Address Line One Entity Address, Address Line One Entity Address, City or Town Entity Address, City or Town Entity Address, State or Province Entity Address, State or Province Entity Address, Postal Zip Code Entity Address, Postal Zip Code City Area Code City Area Code Local Phone Number Local Phone Number Document Quarterly Report Document Quarterly Report Document Transition Report Document Transition Report Restructuring and Related Activities [Abstract] Schedule of Restructuring and Related Costs [Table] Schedule of Restructuring and Related Costs [Table] Restructuring Type [Axis] Restructuring Type [Axis] Type of Restructuring [Domain] Type of Restructuring [Domain] Severance & payroll related charges Employee Severance [Member] Restructuring Cost and Reserve [Line Items] Restructuring Cost and Reserve [Line Items] Restructuring Reserve [Roll Forward] Restructuring Reserve [Roll Forward] Balance at March 31, 2019 Restructuring Reserve Restructuring charges Restructuring Charges Payments Payments for Restructuring Accrual reversals Restructuring Reserve, Accrual Adjustment Balance at June 30, 2019 Lease impairment loss, excluded from restructuring charges Finance And Operating Lease, Impairment Loss Finance And Operating Lease, Impairment Loss Basis of Presentation Basis of Accounting, Policy [Policy Text Block] Use of Estimates Use of Estimates, Policy [Policy Text Block] Recently Issued Accounting Standards New Accounting Pronouncements, Policy [Policy Text Block] Concentration of Credit Risk Concentration Risk, Credit Risk, Policy [Policy Text Block] Fair Value of Financial Instruments Fair Value of Financial Instruments, Policy [Policy Text Block] Revenue Revenue from Contract with Customer [Policy Text Block] Stock-Based Compensation Stock-Based Compensation [Member] Stock-Based Compensation [Member] Restructuring charges incurred Statement of Cash Flows [Abstract] Cash flows from operating activities Net Cash Provided by (Used in) Operating Activities [Abstract] Net loss Adjustments to reconcile net loss to net cash provided by operating activities: Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Depreciation and amortization Depreciation, Depletion and Amortization Noncash stock-based compensation Share-based Payment Arrangement, Noncash Expense Deferred income taxes Deferred Income Tax Expense (Benefit) Amortization of deferred commissions cost Amortization of Deferred Sales Commissions Impairment of operating lease assets Operating Lease, Impairment Loss Changes in operating assets and liabilities: Increase (Decrease) in Operating Capital [Abstract] Trade accounts receivable Increase (Decrease) in Receivables 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 Other current assets and Other assets Increase (Decrease) in Other Operating Assets Deferred commissions cost Increase (Decrease) In Deferred Sales Commissions Increase (Decrease) in Deferred Sales Commissions Accounts payable Increase (Decrease) in Accounts Payable Accrued liabilities Increase (Decrease) in Accrued Liabilities Deferred revenue Increase (Decrease) in Contract with Customer, Liability Other liabilities Increase (Decrease) in Other Operating Liabilities Net cash provided by operating activities Net Cash Provided by (Used in) Operating Activities Cash flows from investing activities Net Cash Provided by (Used in) Investing Activities [Abstract] Purchase of short-term investments Payments to Acquire Short-term Investments Proceeds from maturity of short-term investments Proceeds from Sale of Short-term Investments Purchase of property and equipment Payments to Acquire Property, Plant, and Equipment Net cash provided by (used in) investing activities Net Cash Provided by (Used in) Investing Activities Cash flows from financing activities Net Cash Provided by (Used in) Financing Activities [Abstract] Repurchase of common stock Payments for Repurchase of Common Stock Proceeds from stock-based compensation plans Proceeds, Issuance of Shares, Share-based Payment Arrangement, Including Option Exercised Net cash used in financing activities Net Cash Provided by (Used in) Financing Activities Effects of exchange rate — changes in cash Effect of Exchange Rate on Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents Net increase (decrease) in cash and cash equivalents Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect Cash and cash equivalents at beginning of period Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents Cash and cash equivalents at end of period Restructuring Restructuring and Related Activities Disclosure [Text Block] Share-based Payment Arrangement, Expensed and Capitalized, Amount [Table] Share-based Payment Arrangement, Expensed and Capitalized, Amount [Table] Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs, by Report Line Income Statement Location [Axis] Income Statement Location [Domain] Income Statement Location [Domain] Cost of services revenue Cost Of Services Revenue [Member] Cost of services revenue Member. Sales and marketing Selling and Marketing Expense [Member] Research and development Research and Development Expense [Member] General and administrative General and Administrative Expense [Member] Restructuring Restructuring Charges [Member] 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 expense Restructuring and Related Costs Restructuring and Related Costs [Table Text Block] Income Tax Disclosure [Abstract] Income tax expense (benefit) Deferred tax assets Deferred Tax Assets, Net of Valuation Allowance Disaggregation of Revenue [Table] Disaggregation of Revenue [Table] Software and Products Revenue Software [Member] Software [Member] Customer Support Revenue Customer Support [Member] Customer Support [Member] Professional Services Professional Services [Member] Professional Services [Member] Geographical [Axis] Geographical [Axis] Geographical [Domain] Geographical [Domain] Americas Americas [Member] EMEA EMEA [Member] APAC Asia Pacific [Member] Disaggregation of Revenue [Line Items] Disaggregation of Revenue [Line Items] Total Revenue Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table Text Block] Disaggregation of Revenue Disaggregation of Revenue [Table Text Block] Contract with Customer, Asset and Liability Contract with Customer, Asset and Liability [Table Text Block] PSU Performance Restricted Stock Units [Member] Performance Restricted Stock Units [Member] Market performance shares Performance Shares [Member] Service period Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period Maximum potential to vest (as a percentage) Share-Based Compensation Arrangement By Share-Based Payment Award, Equity Instruments Other Than Options, Maximum Potential To Vest Share-based Compensation Arrangement By Share-based Payment Award, Equity Instruments Other Than Options, Maximum Potential To Vest 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 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 Sources of primary revenue Sources Of Primary Revenue The number of sources of revenue in a typical sales agreement. Customer support agreement term Customer Support Agreement The typical length of Customer Support Agreements. Number of operating segments Number of Operating Segments Revenue recognized in period, included in opening deferred revenue balance Contract with Customer, Liability, Revenue Recognized Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] Revenue expected to be recognized from remaining performance obligations Revenue, Remaining Performance Obligation, Amount Preferred stock, par value (in dollars per share) Preferred Stock, Par or Stated Value Per Share Preferred stock, shares authorized (in shares) Preferred Stock, Shares Authorized Preferred stock, shares issued (in shares) Preferred Stock, Shares Issued Preferred stock, shares outstanding (in shares) Preferred Stock, Shares Outstanding Common stock, par value (in dollars per share) Common Stock, Par or Stated Value Per Share Common stock, shares authorized (in shares) Common Stock, Shares Authorized Common stock, shares issued (in shares) Common Stock, Shares, Issued Common stock, shares outstanding (in shares) Common Stock, Shares, Outstanding Software, licenses Software, Licenses [Member] Software, Licenses [Member] Software, appliances Software, Appliances [Member] Software, Appliances [Member] Professional Services, other Professional Services, Other [Member] Professional Services, Other [Member] Professional Services, education services Professional Services, Education Services [Member] Professional Services, Education Services [Member] Performance obligation, expected payment terms Revenue, Performance Obligation, Description Of Payment Terms, Period Revenue, Performance Obligation, Description Of Payment Terms, Period Schedule of Stock-Based Compensation Expense Share-based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block] Schedule of Restricted Stock Unit Activity Schedule of Nonvested Restricted Stock Units Activity [Table Text Block] Accounts Receivable [Roll Forward] Accounts Receivable [Roll Forward] Accounts Receivable [Roll Forward] Opening Balance as of March 31, 2019 Accounts Receivable, after Allowance for Credit Loss Increase/(decrease), net Increase (Decrease) in Accounts Receivable Ending Balance as of June 30, 2019 Unbilled Receivable (current) [Roll Forward] Contract With Customer, Asset, Net, Current [Roll Forward] Contract With Customer, Asset, Net, Current [Roll Forward] Opening Balance as of March 31, 2019 Unbilled Receivables, Current Increase/(decrease), net Increase (Decrease) In Unbilled Receivables, Current Increase (Decrease) in Unbilled Receivables, Current Ending Balance as of June 30, 2019 Unbilled Receivable (long-term) [Roll Forward] Contract With Customer, Asset, Net, Noncurrent [Roll Forward] Contract With Customer, Asset, Net, Noncurrent [Roll Forward] Opening Balance as of March 31, 2019 Unbilled Receivables, Noncurrent Unbilled Receivables, Noncurrent Increase/(decrease), net Increase (Decrease) In Unbilled Receivables, Noncurrent Increase (Decrease) In Unbilled Receivables, Noncurrent Ending Balance as of June 30, 2019 Deferred Revenue (current) [Roll Forward] Contract With Customer, Liability, Current [Roll Forward] Contract with Customer, Liability, Current [Roll Forward] Opening Balance as of March 31, 2019 Increase/(decrease), net Contract With Customer, Liability, Current, Increase (Decrease) Contract With Customer, Liability, Current, Increase (Decrease) Ending Balance as of June 30, 2019 Deferred Revenue (long-term) [Roll Forward] Contract With Customer, Liability, Noncurrent [Roll Forward] Contract With Customer, Liability, Noncurrent [Roll Forward] Opening Balance as of March 31, 2019 Increase/(decrease), net Contract With Customer, Liability, Noncurrent, Increase (Decrease) Contract With Customer, Liability, Noncurrent, Increase (Decrease) Ending Balance as of June 30, 2019 Income Taxes Income Tax Disclosure [Text Block] Remainder of FY 2020 Lessee, Operating Lease, Liability, Payments, Remainder of Fiscal Year FY 2021 Lessee, Operating Lease, Liability, Payments, Due Year Two FY 2022 Lessee, Operating Lease, Liability, Payments, Due Year Three FY 2023 Lessee, Operating Lease, Liability, Payments, Due Year Four FY 2024 Lessee, Operating Lease, Liability, Payments, Due Year Five Thereafter Lessee, Operating Lease, Liability, Payments, Due after Year Five Total Minimum Lease Payments Lessee, Operating Lease, Liability, Payments, Due Less: Imputed Interest Lessee, Operating Lease, Liability, Undiscounted Excess Amount Present value of operating lease liabilities Less: Current Portion of operating lease liabilities Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Fair Value, Recurring and Nonrecurring [Table] Fair Value, Recurring and Nonrecurring [Table] Fair Value, Hierarchy Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] Level 1 Fair Value, Inputs, Level 1 [Member] Level 2 Fair Value, Inputs, Level 2 [Member] Level 3 Fair Value, Inputs, Level 3 [Member] 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] Cash equivalents Cash and Cash Equivalents, Fair Value Disclosure Short-term investments Debt Securities, Held-to-maturity, Fair Value