Document And Entity Information Entity Registrant Name Entity Registrant Name Entity Central Index Key Entity Central Index Key Document Type Document Type Document Period End Date Document Period End Date Amendment Flag Amendment Flag Current Fiscal Year End Date Current Fiscal Year End Date Entity Well-known Seasoned Issuer Entity Well-known Seasoned Issuer Entity Voluntary Filers Entity Voluntary Filers Entity Current Reporting Status Entity Current Reporting Status Entity Filer Category Entity Filer Category Entity Small Business Entity Small Business Entity Emerging Growth Company Entity Emerging Growth Company Entity Shell Company Entity Shell Company Entity Public Float Entity Public Float Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Document Fiscal Period Focus Document Fiscal Period Focus Document Fiscal Year Focus Document Fiscal Year Focus Quarterly Financial Information Disclosure [Abstract] Total revenue Revenue from Contract with Customer, Excluding Assessed Tax Gross profit Gross Profit Loss from operations Operating Income (Loss) Net loss Net Income (Loss) Attributable to Parent Net income (loss) per share: Earnings Per Share [Abstract] Basic and diluted (in dollars per share) Earnings Per Share, Basic and Diluted SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract] SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Table] SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Table] SEC Schedule, 12-09, Valuation Allowances and Reserves Type [Axis] SEC Schedule, 12-09, Valuation Allowances and Reserves Type [Axis] SEC Schedule, 12-09, Valuation Allowances and Reserves [Domain] SEC Schedule, 12-09, Valuation Allowances and Reserves [Domain] Total Allowance for Doubtful Accounts SEC Schedule, 12-09, Allowance, Credit Loss [Member] SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items] SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items] SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward] SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward] Balance at Beginning of Year SEC Schedule, 12-09, Valuation Allowances and Reserves, Amount Additions Charged to Expenses SEC Schedule, 12-09, Valuation Allowances and Reserves, Additions, Charge to Cost and Expense Deductions SEC Schedule, 12-09, Valuation Allowances and Reserves, Deduction Balance at End of Year Equity [Abstract] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Award Type [Axis] Award Type [Axis] Equity Award [Domain] Equity Award [Domain] Stock Purchase Right Stock Purchase Right [Member] Stock Purchase Right [Member] Restricted stock units Restricted Stock Units (RSUs) [Member] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Number of Shares Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] Beginning balance (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number Granted (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period Vested and released (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 Ending balance (in shares) 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] Beginning balance (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value 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 Vested and 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 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 Ending balance (in dollars per share) Weighted Average Remaining Contractual Term (in Years) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Outstanding, Weighted Average Remaining Contractual Terms Statement of Stockholders' Equity [Abstract] Statement [Table] Statement [Table] 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 Other Comprehensive Income (Loss) AOCI Attributable to Parent [Member] Accumulated Deficit Retained Earnings [Member] Statement [Line Items] Statement [Line Items] Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Beginning balance (in shares) Shares, Issued Beginning balance, amount Stockholders' Equity Attributable to Parent Issuance of common stock under stock plans less withholding taxes (in shares) Stock Issued During Period, Shares, Share-based Compensation, Net of Forfeitures Issuance of common stock under stock plans, less withholding taxes Stock Issued During Period, Value, Share-based Compensation, Net of Forfeitures Withholding taxes from stock plans (in shares) Shares Paid for Tax Withholding for Share Based Compensation Withholding taxes from stock plans Adjustments Related to Tax Withholding for Share-based Compensation Repurchases of common stock (in shares) Stock Repurchased During Period, Shares Repurchases of common stock Stock Repurchased During Period, Value Stock-based compensation expense Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition Income tax benefit from stock-based compensation Adjustments to Additional Paid in Capital, Income Tax Benefit from Share-based Compensation Unrealized investment gain (loss) Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax, Portion Attributable to Parent Foreign currency translation adjustment Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss) Arising During Period, Net of Tax Adjustment from adoption of ASU Cumulative Effect of New Accounting Principle in Period of Adoption Equity component of convertible senior notes, net of issuance costs Adjustments to Additional Paid in Capital, Equity Component of Convertible Debt Ending balance (in shares) Ending balance, amount Debt Disclosure [Abstract] CONVERTIBLE SENIOR NOTES AND CAPPED CALL Debt Disclosure [Text Block] Schedule of Long-term Debt Instruments [Table] Schedule of Long-term Debt Instruments [Table] Long-term Debt, Type [Axis] Long-term Debt, Type [Axis] Long-term Debt, Type [Domain] Long-term Debt, Type [Domain] Convertible Debt Convertible Debt [Member] Debt Instrument [Axis] Debt Instrument [Axis] Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Convertible Senior Notes, Equity Component Convertible Senior Notes, Equity Component [Member] Convertible Senior Notes, Equity Component [Member] Debt Instrument [Line Items] Debt Instrument [Line Items] Debt discount for conversion option Debt Instrument, Convertible, Gross Amount Of Equity Component Debt Instrument, Convertible, Gross Amount Of Equity Component Issuance costs Debt Issuance Costs, Net Net carrying amount Debt Instrument, Convertible, Carrying Amount of Equity Component Property, Plant and Equipment [Abstract] Components of Property, Plant and Equipment Property, Plant and Equipment [Table Text Block] Income Statement [Abstract] Product and Service [Axis] Product and Service [Axis] Product and Service [Domain] Product and Service [Domain] Service revenue Service [Member] Product revenue Product [Member] Operating expenses: Operating Expenses [Abstract] Cost of revenue Cost of Goods and Services Sold Research and development Research and Development Expense Sales and marketing Selling and Marketing Expense General and administrative General and Administrative Expense Impairment of goodwill, intangible assets and equipment Asset Impairment Charges Total operating expenses Operating Expenses Loss from operations Other income, net Nonoperating Income (Expense) Loss before provision (benefit) for income taxes Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Provision (benefit) for income taxes Income Tax Expense (Benefit) Net loss Net loss per share: Weighted average number of shares: Weighted Average Number of Shares Outstanding, Diluted [Abstract] Basic and diluted (in shares) Weighted Average Number of Shares Outstanding, Basic and Diluted Income Tax Disclosure [Abstract] Reconciliation of Unrecognized Tax Benefits [Roll Forward] Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward] Balance at beginning of year Unrecognized Tax Benefits Gross increases - tax position in prior period Unrecognized Tax Benefits, Increase Resulting from Prior Period Tax Positions Gross increases - tax position related to the current year Unrecognized Tax Benefits, Increase Resulting from Current Period Tax Positions Balance at end of year Statement of Financial Position [Abstract] Stockholders' equity: Stockholders' Equity Attributable to Parent [Abstract] 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 per share (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 PROPERTY AND EQUIPMENT Property, Plant and Equipment Disclosure [Text Block] Business Combinations [Abstract] Schedule of Business Acquisitions, by Acquisition [Table] Schedule of Business Acquisitions, by Acquisition [Table] Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets, Major Class Name [Domain] Finite-Lived Intangible Assets, Major Class Name [Domain] Technology-Based Intangible Assets Technology-Based Intangible Assets [Member] Business Acquisition [Axis] Business Acquisition [Axis] Business Acquisition, Acquiree [Domain] Business Acquisition, Acquiree [Domain] LeChat LeChat MarianaIQ MarianaIQ Jitsi Jitsi [Member] Jitsi [Member] Business Acquisition [Line Items] Business Acquisition [Line Items] Acquired finite-lived intangible assets, weighted average useful life Acquired Finite-lived Intangible Assets, Weighted Average Useful Life Finite-lived intangible assets, remaining amortization period Finite-Lived Intangible Assets, Remaining Amortization Period Commitments and Contingencies Disclosure [Abstract] Lessee, Lease, Description [Table] Lessee, Lease, Description [Table] Loss Contingency Nature [Axis] Loss Contingency Nature [Axis] Loss Contingency, Nature [Domain] Loss Contingency, Nature [Domain] State and Local Taxes and Surcharges State And Local Taxes And Surcharges [Member] State and Local Taxes and Surcharges [Member] Sales Tax Sales Tax [Member] Sales Tax [Member] Other Commitments [Axis] Other Commitments [Axis] Other Commitments [Domain] Other Commitments [Domain] Third-Party Customer Support Commitments Third-Party Customer Support Commitments [Member] Third-Party Customer Support Commitments [Member] Third-Party Network Service Provider Commitments Third-Party Network Service Provider Commitments [Member] Third-Party Network Service Provider Commitments [Member] Line of Credit Line of Credit [Member] Credit Facility [Axis] Credit Facility [Axis] Credit Facility [Domain] Credit Facility [Domain] Standby Letters of Credit Standby Letters of Credit [Member] Name of Property [Axis] Name of Property [Axis] Name of Property [Domain] Name of Property [Domain] Headquarters Facility, San Jose, California Headquarters Facility, San Jose, California [Member] Headquarters Facility, San Jose, California [Member] Lessee, Lease, Description [Line Items] Lessee, Lease, Description [Line Items] Operating lease, term of contract Lessee, Operating Lease, Term of Contract Lease, area Lease, Area Lease, Area Line of credit facility, maximum borrowing capacity Line of Credit Facility, Maximum Borrowing Capacity Rent expense Operating Leases, Rent Expense Property and equipment under capital lease Capital Leased Assets, Gross Accumulated depreciation related to assets under capital lease Capital Leases, Lessee Balance Sheet, Assets by Major Class, Accumulated Depreciation Other commitment Other Commitment Accrued contingent indirect tax liabilities Loss Contingency Accrual Incremental sales tax liability Loss Contingency, Estimate of Possible Loss Revenue from Contract with Customer [Abstract] Revenue, Initial Application Period Cumulative Effect Transition [Table] Revenue, Initial Application Period Cumulative Effect Transition [Table] Range [Axis] Range [Axis] Range [Domain] Range [Domain] Minimum Minimum [Member] Maximum Maximum [Member] Revenue, Initial Application Period Cumulative Effect Transition [Line Items] Revenue, Initial Application Period Cumulative Effect Transition [Line Items] Contract with customer, liability, revenue recognized Contract with Customer, Liability, Revenue Recognized Subscription term Revenue, Subscription Term Revenue, Subscription Term Revenue, remaining performance obligation, amount Revenue, Remaining Performance Obligation, Amount Revenue remaining performance obligation, expected timing of satisfaction Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period Employee Stock Option Employee Stock Option [Member] Expected volatility Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Weighted Average Volatility Rate Expected dividend yield Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate Risk-free interest rate, minimum Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate, Minimum Risk-free interest rate, maximum Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate, Maximum Risk-free interest rate Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate Weighted average expected term (in years) Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term Weighted average fair value of options granted (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value Fair Value Disclosures [Abstract] Fair Value Measurements, Recurring and Nonrecurring [Table] Fair Value Measurements, Recurring and Nonrecurring [Table] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] Level 2 Fair Value, Inputs, Level 2 [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] Convertible debt, fair value Convertible Debt, Fair Value Disclosures Goodwill and Intangible Assets Disclosure [Abstract] Goodwill [Roll Forward] Goodwill [Roll Forward] Goodwill, beginning balance Goodwill Impairment loss Goodwill, Impairment Loss Foreign currency translation Goodwill, Foreign Currency Translation Gain (Loss) Impairment loss Goodwill, Acquired During Period Goodwill, ending balance SELECTED QUARTERLY FINANCIAL DATA (UNAUDITED) Quarterly Financial Information [Text Block] Year ending March 31: Capital Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract] 2020 Capital Leases, Future Minimum Payments Due, Next Twelve Months 2021 Capital Leases, Future Minimum Payments Due in Two Years 2022 Capital Leases, Future Minimum Payments Due in Three Years 2023 Capital Leases, Future Minimum Payments Due in Four Years 2024 Capital Leases, Future Minimum Payments Due in Five Years Total minimum payments Capital Leases, Future Minimum Payments Due Less: Amount representing interest Capital Leases, Future Minimum Payments, Interest Included in Payments Total payments, net of interest Capital Leases, Future Minimum Payments, Present Value of Net Minimum Payments Less: Short-term portion of capital lease obligations Capital Lease Obligations, Current Long-term portion of capital lease obligations Capital Lease Obligations, Noncurrent Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract] Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract] 2020 Operating Leases, Future Minimum Payments Due, Next Twelve Months 2021 Operating Leases, Future Minimum Payments, Due in Two Years 2022 Operating Leases, Future Minimum Payments, Due in Three Years 2023 Operating Leases, Future Minimum Payments, Due in Four Years 2024 Operating Leases, Future Minimum Payments, Due in Five Years Thereafter Operating Leases, Future Minimum Payments, Due Thereafter Total Operating Leases, Future Minimum Payments Due Accounting Changes and Error Corrections [Abstract] Schedule of Error Corrections and Prior Period Adjustment Restatement [Table] Schedule of Error Corrections and Prior Period Adjustment Restatement [Table] Service Product Restatement [Axis] Restatement [Axis] Restatement [Domain] Restatement [Domain] Pre-Reclassification Previously Reported [Member] Reclassifications Restatement Adjustment [Member] Error Corrections and Prior Period Adjustments Restatement [Line Items] Error Corrections and Prior Period Adjustments Restatement [Line Items] Research and development Sales and marketing General and administrative Deferred tax assets Deferred Tax Assets, Net [Abstract] Net operating loss carryforwards Deferred Tax Assets, Operating Loss Carryforwards Net operating loss carryforwards Deferred Tax Assets, Tax Credit Carryforwards, Research Stock-based compensation Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Share-based Compensation Cost Reserves and allowances Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals Fixed assets and intangibles Deferred Tax Assets, Property, Plant and Equipment Gross deferred tax assets Deferred Tax Assets, Gross, Noncurrent Valuation allowance Deferred Tax Assets, Valuation Allowance Total deferred tax assets Deferred Tax Assets, Net of Valuation Allowance Deferred tax liabilities Deferred Tax Liabilities, Net [Abstract] Deferred sales commissions Deferred Tax Liabilities, Deferred Expense Convertible debt Deferred Tax Liabilities, Financing Arrangements Net deferred taxes Deferred Tax Liabilities, Net REVENUE RECOGNITION Revenue from Contract with Customer [Text Block] ACQUISITIONS Business Combination Disclosure [Text Block] Schedule of Acquired Finite-Lived Intangible Assets by Major Class Schedule of Acquired Finite-Lived Intangible Assets by Major Class [Table Text Block] Schedule of Finite-Lived Intangible Assets, Future Amortization Expense Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block] Schedule of Goodwill Schedule of Goodwill [Table Text Block] SCHEDULE II SEC Schedule, 12-09, Schedule of Valuation and Qualifying Accounts Disclosure [Text Block] Income Tax Contingency [Table] Income Tax Contingency [Table] Tax Period [Axis] Tax Period [Axis] Tax Period [Domain] Tax Period [Domain] Tax Year 2019 Tax Year 2019 [Member] Tax Year 2019 Tax Years Prior To 2019 Tax Years Prior To 2019 [Member] Tax Years Prior To 2019 [Member] Income Tax Authority [Axis] Income Tax Authority [Axis] Income Tax Authority [Domain] Income Tax Authority [Domain] Internal Revenue Service (IRS) Internal Revenue Service (IRS) [Member] State and Local Jurisdiction State and Local Jurisdiction [Member] Income Tax Contingency [Line Items] Income Tax Contingency [Line Items] Deferred tax asset adjustment due to change in enacted tax rate Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount Undistributed earnings (losses) of foreign subsidiaries Undistributed Earnings of Foreign Subsidiaries Deferred tax assets, valuation allowance Operating loss carryforwards Operating Loss Carryforwards Research tax credit carryforwards Tax Credit Carryforward, Amount Federal tax rate Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent Unrecognized tax benefits Accrued penalties and interest Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued Statement of Comprehensive Income [Abstract] Net loss Other comprehensive income (loss), net of tax Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent [Abstract] Unrealized gains (losses) on investments in securities Foreign currency translation adjustment Comprehensive loss Comprehensive Income (Loss), Net of Tax, Attributable to Parent Cash and Cash Equivalents [Axis] Cash and Cash Equivalents [Axis] Cash and Cash Equivalents [Domain] Cash and Cash Equivalents [Domain] Cash Cash [Member] Money market funds Money Market Funds [Member] Financial Instruments [Axis] Financial Instrument [Axis] Financial Instruments [Domain] Financial Instruments [Domain] Commercial paper Commercial Paper [Member] Corporate debt Corporate Debt Securities [Member] Municipal securities US States and Political Subdivisions Debt Securities [Member] Asset backed securities Asset-backed Securities [Member] Mortgage backed securities Collateralized Mortgage Backed Securities [Member] Agency bond Other Debt Obligations [Member] Level 1 Fair Value, Inputs, Level 1 [Member] Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Cash and cash equivalents, fair value disclosure Cash and Cash Equivalents, Fair Value Disclosure Amortized Costs Debt Securities, Available-for-sale, Amortized Cost Accumulated gross unrealized gain, before tax Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax Accumulated gross unrealized loss, before tax Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax Debt securities, available-for-sale Debt Securities, Available-for-sale Cash, cash equivalents and debt securities available-for-sale, amortized cost Cash, Cash Equivalents and Debt Securities Available-for-sale, Amortized Cost Cash, Cash Equivalents and Debt Securities Available-for-sale Cash, cash equivalents and debt securities available-for-sale Cash, Cash Equivalents and Debt Securities Available-for-sale Cash, Cash Equivalents and Debt Securities Available-for-sale Convertible Debt Convertible Debt [Table Text Block] Interest Income and Interest Expense Disclosure Interest Income and Interest Expense Disclosure [Table Text Block] Schedule of Finite-Lived Intangible Assets [Table] Schedule of Finite-Lived Intangible Assets [Table] Technology Patented Technology [Member] Customer relationships Customer Relationships [Member] Trade names/domains Trade Names [Member] Finite-Lived Intangible Assets [Line Items] Finite-Lived Intangible Assets [Line Items] Gross Carrying Amount Finite-Lived Intangible Assets, Gross Accumulated Amortization Finite-Lived Intangible Assets, Accumulated Amortization Net Carrying Amount Finite-Lived Intangible Assets, Net INCOME TAXES Income Tax Disclosure [Text Block] Accounting Policies [Abstract] Initial Application Period Cumulative Effect Transition [Axis] Initial Application Period Cumulative Effect Transition [Axis] Initial Application Period Cumulative Effect Transition [Domain] Initial Application Period Cumulative Effect Transition [Domain] ASC 605 Calculated under Revenue Guidance in Effect before Topic 606 [Member] Adjustments Difference between Revenue Guidance in Effect before and after Topic 606 [Member] Adjustments for New Accounting Pronouncements [Axis] Adjustments for New Accounting Pronouncements [Axis] Type of Adoption [Domain] Type of Adoption [Domain] Accounting Standards Update 2014-09 Accounting Standards Update 2014-09 [Member] Balance Sheet Related Disclosures [Abstract] Balance Sheet Related Disclosures [Abstract] Current assets: Assets, Current [Abstract] Deferred sales commission costs Capitalized Contract Cost, Net, Current Other current assets Other Assets, Current Non-current assets: Assets, Noncurrent [Abstract] Deferred sales commission costs, non-current Capitalized Contract Cost, Net, Noncurrent Accumulated deficit Retained Earnings (Accumulated Deficit) Income Statement Related Disclosures [Abstract] Income Statement Related Disclosures [Abstract] Net loss per share: Earnings Per Share, Basic and Diluted [Abstract] Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Amortization of deferred sales commission costs Amortization of Deferred Charges Deferred sales commission costs Increase (Decrease) in Deferred Charges Other current and non-current assets Increase (Decrease) in Other Operating Assets Net cash provided by operating activities Net Cash Provided by (Used in) Operating Activities Numerator: Net Income (Loss) Available to Common Stockholders, Basic [Abstract] Net loss available to common stockholders Denominator: Earnings Per Share, Basic and Diluted, Other Disclosures [Abstract] Denominator for basic and diluted calculation (in shares) Net loss per share - basic and diluted (in dollars per share) Option Indexed to Issuer's Equity, Type [Axis] Option Indexed to Issuer's Equity, Type [Axis] Option Indexed to Issuer's Equity, Type [Domain] Option Indexed to Issuer's Equity, Type [Domain] Call Option Call Option [Member] Convertible Senior Notes Convertible Senior Notes [Member] Convertible Senior Notes [Member] Debt instrument, face value Debt Instrument, Face Amount Debt instrument, interest rate Debt Instrument, Interest Rate, Stated Percentage Proceeds from issuance of debt Proceeds from Debt, Net of Issuance Costs Debt instrument, convertible, conversion ratio Debt Instrument, Convertible, Conversion Ratio Debt instrument, convertible, conversion price (in dollars per share) Debt Instrument, Convertible, Conversion Price Debt instrument, convertible, threshold trading days Debt Instrument, Convertible, Threshold Trading Days Debt instrument, convertible, threshold consecutive trading days Debt Instrument, Convertible, Threshold Consecutive Trading Days Debt instrument, convertible, threshold percentage of stock price trigger Debt Instrument, Convertible, Threshold Percentage of Stock Price Trigger Debt instrument, convertible, measurement period Debt Instrument, Convertible, Measurement Period Debt Instrument, Convertible, Measurement Period Debt instrument, convertible, threshold consecutive trading days preceding measurement period Debt Instrument, Convertible, Threshold Consecutive Trading Days Preceding Measurement Period Debt Instrument, Convertible, Threshold Consecutive Trading Days Preceding Measurement Period Debt instrument, threshold percentage of sales price per share Debt Instrument, Convertible, Threshold Percentage of Sales Price Per Share Debt Instrument, Convertible, Threshold Percentage of Sales Price Per Share Debt instrument, redemption price, percentage Debt Instrument, Redemption Price, Percentage Conversion option Debt instrument, effective interest rate Debt Instrument, Interest Rate, Effective Percentage Debt issuance costs, net Debt Issuance Costs, Gross Debt instrument, strike price per share (in dollars per share) Option Indexed to Issuer's Equity, Strike Price Debt instrument, initial cap price per share (in dollars per share) Option Indexed To Issuer's Equity, Cap Price Option Indexed To Issuer's Equity, Cap Price Option indexed to issuer's equity, indexed shares (in shares) Option Indexed to Issuer's Equity, Indexed Shares Payments for capped call transactions Adjustments to Additional Paid in Capital, Equity Component of Convertible Debt, Subsequent Adjustments STOCKHOLDERS' EQUITY Stockholders' Equity Note Disclosure [Text Block] Employee Stock Employee Stock [Member] Plan Name [Axis] Plan Name [Axis] Plan Name [Domain] Plan Name [Domain] 2006 Plan 2006 Plan [Member] 2006 Plan [Member] 2012 Plan 2012 Plan [Member] 2012 Plan [Member] 2013 Plan 2013 Plan [Member] 2013 Plan [Member] 2017 Plan 2017 Plan [Member] 2017 Plan [Member] Employee Stock Purchase Plan Employee Stock Purchase Plan [Member] Employee Stock Purchase Plan [Member] Share Repurchase Program [Axis] Share Repurchase Program [Axis] Share Repurchase Program [Domain] Share Repurchase Program [Domain] 2015 Repurchase Program 2015 Repurchase Program [Member] 2015 Repurchase Program [Member] 2017 Repurchase Plan 2017 Repurchase Plan [Member] 2017 Repurchase Plan [Member] Number of shares reserved for future issuance (in shares) Common Stock, Capital Shares Reserved for Future Issuance Vesting period Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period Expiration period Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period Number of shares available for future grant (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant Number of additional shares reserved for future issuance (in shares) Common Stock, Additional Capital Shares Reserved for Future Issuance Common Stock, Additional Capital Shares Reserved for Future Issuance Total intrinsic value of options exercised Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value Unamortized stock-based compensation expense Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized Weighted average period of recognition for unrecognized compensation expense Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition Term of extension Employee Stock Purchase Plan, Term of Extension Employee Stock Purchase Plan, Term of Extension Value of shares issued under employee stock purchase plan Stock Issued During Period, Value, Employee Stock Purchase Plan Percentage of market value price of common stock under Employee Stock Purchase Plan Employee Stock Purchase Plan, Percentage Of Market Value Price Of Common Stock Employee Stock Purchase Plan, Percentage Of Market Value Price Of Common Stock Duration of offering period Employee Stock Purchase Plan, Duration Of Offering Period Employee Stock Purchase Plan, Duration Of Offering Period Duration of purchase period Employee Stock Purchase Plan, Duration Of Purchase Period Employee Stock Purchase Plan, Duration Of Purchase Period Maximum contribution percentage amount of employee's base compensation Employee Stock Purchase Plan, Maximum Contribution of Employee's Base Compensation Stock repurchase program, authorized amount Stock Repurchase Program, Authorized Amount Stock repurchase program, remaining authorized repurchase amount Stock Repurchase Program, Remaining Authorized Repurchase Amount Conversion option Adjustments to Additional Paid in Capital, Convertible Debt with Conversion Feature Issuance costs Adjustments to Additional Paid in Capital, Stock Issued, Own-share Lending Arrangement, Issuance Costs Total Property, Plant and Equipment [Table] Property, Plant and Equipment [Table] Property, Plant and Equipment, Type [Axis] Property, Plant and Equipment, Type [Axis] Property, Plant and Equipment, Type [Domain] Property, Plant and Equipment, Type [Domain] Computer equipment Computer Equipment [Member] Software development costs Software Development [Member] Software licenses Software License [Member] Software License [Member] Leasehold improvements Leasehold Improvements [Member] Furniture and fixtures Furniture and Fixtures [Member] Construction in progress Construction in Progress [Member] Property, Plant and Equipment [Line Items] Property, Plant and Equipment [Line Items] Gross Property, Plant and Equipment, Gross Less: accumulated depreciation and amortization Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Net Property, Plant and Equipment, Net FAIR VALUE MEASUREMENTS Fair Value Disclosures [Text Block] The Company Business Description and Basis of Presentation [Text Block] Fiscal Period Fiscal Period, Policy [Policy Text Block] Acquisitions Business Combinations Policy [Policy Text Block] Principles of Consolidation Consolidation, Policy [Policy Text Block] Reclassifications Reclassification, Policy [Policy Text Block] Use of Estimates Use of Estimates, Policy [Policy Text Block] Revenue Recognition Revenue from Contract with Customer [Policy Text Block] Cash, Cash Equivalents and Investments Cash and Cash Equivalents, Policy [Policy Text Block] Accounts Receivable Allowance Receivables, Policy [Policy Text Block] Property and Equipment Property, Plant and Equipment, Policy [Policy Text Block] Accounting for Long-Lived Assets Impairment or Disposal of Long-Lived Assets, Policy [Policy Text Block] Goodwill and Other Intangible Assets Goodwill and Intangible Assets, Goodwill, Policy [Policy Text Block] Convertible Senior Notes Debt, Policy [Policy Text Block] Warranty Expense Standard Product Warranty, Policy [Policy Text Block] Research, Development and Software Costs Research, Development, and Computer Software, Policy [Policy Text Block] Advertising Costs Advertising Costs, Policy [Policy Text Block] Foreign Currency Translation Foreign Currency Transactions and Translations Policy [Policy Text Block] Segment Information Segment Reporting, Policy [Policy Text Block] Concentrations Concentration Risk, Credit Risk, Policy [Policy Text Block] Fair Values of Financial Instruments Fair Value of Financial Instruments, Policy [Policy Text Block] Accounting for Stock-Based Compensation Share-based Compensation, Option and Incentive Plans Policy [Policy Text Block] Research and Development Costs Research and Development Expense, Policy [Policy Text Block] Comprehensive Income (Loss) Comprehensive Income, Policy [Policy Text Block] Net Income (Loss) Per Share Earnings Per Share, Policy [Policy Text Block] Deferred Rent Lessee, Leases [Policy Text Block] Recently Adopted Accounting Pronouncements, Recent Accounting Pronouncements New Accounting Pronouncements, Policy [Policy Text Block] Guarantees Guarantees, Indemnifications and Warranties Policies [Policy Text Block] Accounts receivable, net Accounts Receivable, Net, Current Other current assets Contract with Customer, Asset, Net, Current Deferred revenue Contract with Customer, Liability, Current Non-current deferred revenue Contract with Customer, Liability, Noncurrent Subsequent Events [Abstract] SUBSEQUENT EVENTS Subsequent Events [Text Block] Due within one year Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, within One Year, Fair Value Due after one year Debt Securities Available-for-sale, Due After One Year Available-For-Sale Securities, Due After One Year Total Segment Reporting [Abstract] Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] Geographical [Axis] Geographical [Axis] Geographical [Domain] Geographical [Domain] Americas Americas [Member] Europe Europe [Member] Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Revenue Property and Equipment Principal Unamortized debt discount Debt Instrument, Unamortized Discount Unamortized issuance costs Net carrying amount Long-term Debt RECLASSIFICATIONS Accounting Changes [Text Block] Contract Balances Contract with Customer, Asset and Liability [Table Text Block] Accounting Standards Update 2016-02 Accounting Standards Update 2016-02 [Member] Subsequent Event Type [Axis] Subsequent Event Type [Axis] Subsequent Event Type [Domain] Subsequent Event Type [Domain] Subsequent Event Subsequent Event [Member] Computer Software, Intangible Asset Computer Software, Intangible Asset [Member] Equipment Equipment [Member] Software and Software Development Costs Software and Software Development Costs [Member] Vesting [Axis] Vesting [Axis] Vesting [Domain] Vesting [Domain] Share-based Compensation Award, Tranche One Share-based Compensation Award, Tranche One [Member] Share-based Compensation Award, Tranche Two Share-based Compensation Award, Tranche Two [Member] Performance Stock Units Performance Shares [Member] Capitalized contract cost, amortization period Capitalized Contract Cost, Amortization Period Property, plant and equipment, useful life Property, Plant and Equipment, Useful Life Number of reporting units Number of Reporting Units Goodwill impairment loss Finite-lived intangible asset, useful life Finite-Lived Intangible Asset, Useful Life Advertising expense Advertising Expense Vesting percentage Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage Percentage increase (decrease) in shares earned per 1% change in total shareholder returns Share-Based Compensation Arrangement By Share-based Payment Award, Change In Shares Earned Per One Percent Change In Total Shareholder Returns, Percentage Share-Based Compensation Arrangement By Share-based Payment Award, Increase (Decrease) In Number Of Shares Issued Upon Vesting, Percentage Minimum percentage of common stock performance Share-Based Compensation Arrangement By Share-Based Payment Award, Minimum Common Stock Performance, Percentage Share-Based Compensation Arrangement By Share-Based Payment Award, Minimum Common Stock Performance, Percentage Maximum percentage of number of shares issued per tranche Share-Based Compensation Arrangement By Share-Based Payment Award, Maximum Number Of Shares Issued Per Tranche, Percentage Of Target Share-Based Compensation Arrangement By Share-Based Payment Award, Maximum Number Of Shares Issued Per Tranche, Percentage Of Target Operating lease, right-of-use asset Operating Lease, Right-of-Use Asset Operating lease, liability Operating Lease, Liability Deferred rent credit Deferred Rent Credit Income Statement Location [Axis] Income Statement Location [Axis] Income Statement Location [Domain] Income Statement Location [Domain] Cost of Sales Cost of Sales [Member] Research and Development Expense Research and Development Expense [Member] Selling and Marketing Expense Selling and Marketing Expense [Member] General and Administrative Expense General and Administrative Expense [Member] Stock-based employee compensation expense Allocated Share-based Compensation Expense, Net of Tax 2020 Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months 2021 Finite-Lived Intangible Assets, Amortization Expense, Year Two 2022 Finite-Lived Intangible Assets, Amortization Expense, Year Three 2023 Finite-Lived Intangible Assets, Amortization Expense, Year Four Total Other Intangible Assets, Net COMMITMENTS AND CONTINGENCIES Commitments and Contingencies Disclosure [Text Block] THE COMPANY AND SIGNIFICANT ACCOUNTING POLICIES Organization, Consolidation, Basis of Presentation, Business Description and Accounting Policies [Text Block] Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Antidilutive Securities [Axis] Antidilutive Securities [Axis] Antidilutive Securities, Name [Domain] Antidilutive Securities, Name [Domain] Stock options Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Anti-dilutive shares Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount GEOGRAPHICAL INFORMATION Segment Reporting Disclosure [Text Block] Number of Shares Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Number of Shares [Roll Forward] Outstanding, beginning balance (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number Granted (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures Exercised (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period Canceled/forfeited (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period Outstanding, ending balance (in shares) Vested and expected to vest, end of period (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Number Exercisable, end of period (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number Weighted Average Exercise Price Per Share Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract] Outstanding, beginning balance (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price Granted (in dollars per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price Exercised (in dollars per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price Canceled/Forfeited (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period, Weighted Average Exercise Price Outstanding, ending balance (in dollars per share) Vested and expected to vest, ending balance (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Weighted Average Exercise Price Exercisable, end of period (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price Other current assets Deferred revenue Contract with Customer, Liability Change in other current assets Increase (Decrease) in Other Current Assets Change in deferred revenue Increase (Decrease) in Contract with Customer, Liability1 Increase (Decrease) in Contract with Customer, Liability1 Fair Value Measurements, Recurring and Nonrecurring Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] Tax benefit at statutory rate Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount State income taxes before valuation allowance, net of federal effect Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount Foreign tax rate differential Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential, Amount Research and development credits Effective Income Tax Rate Reconciliation, Tax Credit, Research, Amount Change in valuation allowance Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount Compensation/option differences Effective Income Tax Rate Reconciliation, Nondeductible Expense, Share-based Compensation Cost, Amount Non-deductible compensation Effective Income Tax Rate Reconciliation, Nondeductible Expense, Other, Amount Tax Act rate change impact Acquisition costs Effective Income Tax Rate Reconciliation, Acquisition Costs, Amount Effective Income Tax Rate Reconciliation, Acquisition Costs, Amount Foreign loss not benefited Foreign Income Tax Expense (Benefit), Continuing Operations Other Effective Income Tax Rate Reconciliation, Other Adjustments, Amount Total income tax provision (benefit) Schedule of New Accounting Pronouncements and Changes in Accounting Principles Schedule of New Accounting Pronouncements and Changes in Accounting Principles [Table Text Block] Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table Text Block] Disclosure Of Share-Based Compensation Arrangements By Share-Based Payment Award Disclosure of Share-based Compensation Arrangements by Share-based Payment Award [Table Text Block] Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] Schedule of Share-based Payment Award, Employee Stock Purchase Plan, Valuation Assumptions Schedule of Share-based Payment Award, Employee Stock Purchase Plan, Valuation Assumptions [Table Text Block] Schedule of Future Minimum Rental Payments for Operating Leases Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block] Schedule of Future Minimum Lease Payments for Capital Leases Schedule of Future Minimum Lease Payments for Capital Leases [Table Text Block] Schedule of Segment Reporting Information, by Segment Schedule of Segment Reporting Information, by Segment [Table Text Block] Long-lived Assets by Geographic Areas Long-lived Assets by Geographic Areas [Table Text Block] NET INCOME (LOSS) PER SHARE Earnings Per Share [Text Block] Schedule of Components of Income Tax Expense (Benefit) Schedule of Components of Income Tax Expense (Benefit) [Table Text Block] Schedule of Deferred Tax Assets and Liabilities Schedule of Deferred Tax Assets and Liabilities [Table Text Block] Schedule of Effective Income Tax Rate Reconciliation Schedule of Effective Income Tax Rate Reconciliation [Table Text Block] Summary of Income Tax Contingencies Summary of Income Tax Contingencies [Table Text Block] INTANGIBLE ASSETS, GOODWILL AND OTHER ASSETS Goodwill and Intangible Assets Disclosure [Text Block] Schedule of Error Corrections and Prior Period Adjustments Schedule of Error Corrections and Prior Period Adjustments [Table Text Block] Net Income Per Share Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block] Quarterly Financial Data (Unaudited) Quarterly Financial Information [Table Text Block] Contractual interest expense Interest Expense, Debt, Excluding Amortization Amortization of debt discount Amortization of Debt Discount (Premium) Amortization of issuance costs Amortization of Debt Issuance Costs Total interest expense Interest Expense, Debt Current: Current Income Tax Expense (Benefit), Continuing Operations [Abstract] Federal Current Federal Tax Expense (Benefit) State Current State and Local Tax Expense (Benefit) Foreign Current Foreign Tax Expense (Benefit) Total current tax provision Current Income Tax Expense (Benefit) Deferred Deferred Income Tax Expense (Benefit), Continuing Operations [Abstract] Federal Deferred Federal Income Tax Expense (Benefit) State Deferred State and Local Income Tax Expense (Benefit) Foreign Deferred Foreign Income Tax Expense (Benefit) Total deferred tax provision (benefit) Deferred Income Tax Expense (Benefit)1 Deferred Income Tax Expense (Benefit)1 Cash flows from operating activities: Net Cash Provided by (Used in) Operating Activities [Abstract] Adjustments to reconcile net loss to net cash provided by operating activities Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Depreciation Depreciation Amortization of intangibles Amortization of Intangible Assets Impairment of goodwill and long-lived assets Impairment of Long-Lived Assets Held-for-use Amortization of capitalized software Other Depreciation and Amortization Amortization of debt discount and issuance costs Amortization of Debt Issuance Costs and Discounts Non-cash lease expense Lease, Non-Cash Lease Expense Lease, Non-Cash Lease Expense Stock-based compensation expense Share-based Compensation Tax benefit from stock-based compensation expense Deferred income tax expense (benefit) Deferred Income Tax Expense (Benefit) Gain on escrow settlement Gain On Escrow Settlement Gain On Escrow Settlement Other Other Noncash Expense Changes in assets and liabilities: Increase (Decrease) in Operating Capital [Abstract] Accounts receivable Increase (Decrease) in Accounts Receivable Other current and noncurrent assets Accounts payable and accruals Increase (Decrease) in Accounts Payable and Accrued Liabilities Deferred revenue Increase (Decrease) in Contract with Customer, Liability Net cash (used in) provided by operating activities Cash flows from investing activities: Net Cash Provided by (Used in) Investing Activities [Abstract] Purchases of property and equipment Payments to Acquire Property, Plant, and Equipment Cost of capitalized software Payments for Software Proceeds from escrow settlement Proceeds from Collection of Other Receivables Purchases of investments Payments to Acquire Marketable Securities Sales of investments Proceeds from Sale and Maturity of Marketable Securities Proceeds from maturities of investments Proceeds from Sale, Maturity and Collection of Short-term Investments Acquisition of businesses, net of cash acquired Payments to Acquire Businesses, Net of Cash Acquired 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] Capital lease payments Repayments of Long-term Capital Lease Obligations Payment of contingent consideration Repayments of Other Debt Repurchase of common stock, including for withholding taxes Payments for Repurchase of Common Stock Tax benefit from stock-based compensation expense Tax benefit from stock-based compensation expense Proceeds from issuance of common stock under employee stock plans Proceeds from Stock Plans Purchases of capped call Payments For Capped Call Payments For Capped Call Net proceeds from issuance of convertible senior notes Proceeds from Convertible Debt Net cash provided by (used in) financing activities Net Cash Provided by (Used in) Financing Activities Effect of exchange rate changes on 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, cash equivalents and restricted cash, beginning of year Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents Cash, cash equivalents and restricted cash, end of year Supplemental and non-cash disclosures: Supplemental Cash Flow Information [Abstract] Equipment acquired under capital leases Capital Lease Obligations Incurred Interest paid Interest Paid, Excluding Capitalized Interest, Operating Activities Income taxes paid Income Taxes Paid Assets [Abstract] Assets [Abstract] Cash and cash equivalents Short-term investments Short-term Investments Accounts receivable, net Total current assets Assets, Current Property and equipment, net Intangible assets, net Intangible Assets, Net (Excluding Goodwill) Goodwill Restricted cash Restricted Cash 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 compensation Employee-related Liabilities, Current Accrued taxes Accrued Income Taxes, Current Other accrued liabilities Other Accrued Liabilities, Current Total current liabilities Liabilities, Current Convertible senior notes, net Long-term Debt, Excluding Current Maturities Non-current liabilities Other Liabilities, Noncurrent Total liabilities Liabilities Commitments and contingencies (Note 6) Commitments and Contingencies Preferred stock, $0.001 par value: Authorized: 5,000,000 shares; Issued and outstanding: no shares at March 31, 2019 and 2018 Preferred Stock, Value, Issued Common stock, $0.001 par value: Authorized: 200,000,000 shares; Issued and outstanding: 96,119,888 shares and 92,847,354 shares at March 31, 2019 and 2018, respectively Common Stock, Value, Issued Additional paid-in capital Additional Paid in Capital Accumulated other comprehensive loss Accumulated Other Comprehensive Income (Loss), Net of Tax Total stockholders' equity Total liabilities and stockholders' equity Liabilities and Equity Reporting Unit [Axis] Reporting Unit [Axis] Reporting Unit [Domain] Reporting Unit [Domain] DXI DXI [Member] DXI [Member] Intangible asset impairment Impairment of Intangible Assets, Finite-lived Capitalized contract cost, amortization Capitalized Contract Cost, Amortization Capitalized contract cost, impairment loss Capitalized Contract Cost, Impairment Loss