Income Tax Disclosure [Abstract] Effective Income Tax Rate Reconciliation, Percent [Abstract] Effective Income Tax Rate Reconciliation, Percent [Abstract] Statutory federal income tax expense (benefit) rate Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent State and local income tax expense, net of federal income tax effect Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Percent Impact of limit on executive compensation Effective Income Tax Reconciliation, Impact of Limit on Executive Compensation Effective Income Tax Reconciliation, Impact of Limit on Executive Compensation Foreign earnings taxed at different rates Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential, Percent Domestic permanent differences Effective Income Tax Rate Reconciliation Permanent Differences Effective income tax rate reconciliation permanent differences. Foreign tax credits Effective Income Tax Rate Reconciliation, Tax Credit, Foreign, Percent Research credits Effective Income Tax Rate Reconciliation, Tax Credit, Research, Percent Tax reserves Effective Income Tax Rate Reconciliation Tax Reserves Effective income tax rate reconciliation for changes in tax reserves. Valuation allowance Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Percent Statutory tax rate changes Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Percent Other differences, net Effective Income Tax Rate Reconciliation, Other Adjustments, Percent Effective income tax expense (benefit) Effective Income Tax Rate Reconciliation, Percent Document And Entity Information [Abstract] Document and Entity Information Abstract. Trading Symbol Trading Symbol Entity Registrant Name Entity Registrant Name Entity Central Index Key Entity Central Index Key Current Fiscal Year End Date Current Fiscal Year End Date Entity Filer Category Entity Filer Category Document Type Document Type Document Period End Date Document Period End Date Document Fiscal Year Focus Document Fiscal Year Focus Document Fiscal Period Focus Document Fiscal Period Focus Amendment Flag Amendment Flag Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding 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 Public Float Entity Public Float Components of Income Before Income Taxes Schedule of Income before Income Tax, Domestic and Foreign [Table Text Block] Components of Income Tax Expense (Benefit) Schedule of Components of Income Tax Expense (Benefit) [Table Text Block] Reconciliation of Statutory Tax Rates and Effective Tax Rates Schedule of Effective Income Tax Rate Reconciliation [Table Text Block] Components of Deferred Tax Assets Schedule of Deferred Tax Assets and Liabilities [Table Text Block] Schedule of Tax Years Subject to Income Tax Examination Schedule Of Tax Years Subject To Income Tax Examination [Table Text Block] This disclosure is a description of tax years that remain subject to examination by major tax jurisdictions. Reconciliation of Amounts of Unrecognized Tax Benefits Summary of Income Tax Contingencies [Table Text Block] Valuation and Qualifying Accounts [Abstract] Valuation and Qualifying Accounts Disclosure [Table] Valuation and Qualifying Accounts Disclosure [Table] Valuation Allowances and Reserves Type Valuation Allowances and Reserves Type [Axis] Valuation Allowances and Reserves [Domain] Valuation Allowances and Reserves [Domain] Allowance for doubtful accounts Allowance for Doubtful Accounts [Member] Valuation allowance for deferred taxes Valuation Allowance of Deferred Tax Assets [Member] Valuation and Qualifying Accounts Disclosure [Line Items] Valuation and Qualifying Accounts Disclosure [Line Items] Movement in Valuation Allowances and Reserves [Roll Forward] Movement in Valuation Allowances and Reserves [Roll Forward] Balance at Beginning of Year Valuation Allowances and Reserves, Balance Charged (Credited) to Costs and Expenses Valuation Allowances and Reserves, Additions for Charges to Cost and Expense Deductions Valuation Allowances and Reserves, Deductions Balance at End of Year Schedule II - Valuation and Qualifying Accounts Schedule of Valuation and Qualifying Accounts Disclosure [Text Block] Payables and Accruals [Abstract] Accrued Liabilities Accounts Payable and Accrued Liabilities Disclosure [Text Block] Segment Reporting [Abstract] Schedule of Revenue by Geographic Area Schedule of Revenue from External Customers Attributed to Foreign Countries by Geographic Area [Table Text Block] Schedule of Long-Lived Assets by Geographic Area Schedule of Disclosure on Geographic Areas, Long-Lived Assets in Individual Foreign Countries by Country [Table Text Block] Disclosure of Compensation Related Costs, Share-based Payments [Abstract] Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range [Table] Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range [Table] Exercise Price Range Exercise Price Range [Axis] Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Domain] Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Domain] $11.12 - 13.81 Exercise Price Range One [Member] Exercise Price Range One [Member] 15.88 - 23.88 Exercise Price Range Two [Member] Exercise Price Range Two [Member] 26.83 Exercise Price Range Three [Member] Exercise Price Range Three [Member] 27.02 - 41.31 Exercise Price Range Four [Member] Exercise Price Range Four [Member] 41.55 Exercise Price Range Five [Member] Exercise Price Range Five [Member] 43.30 - 45.39 Exercise Price Range Six [Member] Exercise Price Range Six [Member] 45.44 Exercise Price Range Seven [Member] Exercise Price Range Seven [Member] 46.59 - 55.58 Exercise Price Range Eight [Member] Exercise Price Range Eight [Member] 56.57 Exercise Price Range Nine [Member] Exercise Price Range Nine [Member] 58.25 - 87.20 Exercise Price Range Ten [Member] Exercise Price Range Ten [Member] Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] Range of Exercise Prices, lower range limit (in dollars per share) Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Range Limit Range of Exercise Prices, upper range limit (in dollars per share) Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Upper Range Limit Options Outstanding at March 31, 2017 (in shares) Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Number of Outstanding Options Weighted-Average Remaining Contractual Life (in years) Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Outstanding Options, Weighted Average Remaining Contractual Term Weighted-Average Exercise Price (in dollars per share) Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Outstanding Options, Weighted Average Exercise Price Options Exercisable at March 31, 2017 (in shares) Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Number of Exercisable Options Weighted- Average Exercise Price (in dollars per share) Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Exercisable Options, Weighted Average Exercise Price Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract] Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract] Expected volatility, minimum Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate, Minimum Expected volatility, maximum Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate, Maximum Weighted average expected volatility Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Weighted Average Volatility Rate Risk-free interest rates, minimum Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate, Minimum Risk-free interest rates, maximum Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate, Maximum Weighted average expected life (in years) Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term Statement of Comprehensive Income [Abstract] Net income 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 income (loss) Comprehensive Income (Loss), Net of Tax, Attributable to Parent Accounting Policies [Abstract] Computation of Basic and Diluted Net Income Per Common Share Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Summary of Potential Outstanding Common Stock Equivalents Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block] Financial Assets Measured At Fair Value On Recurring Basis Fair Value, Assets Measured on Recurring Basis [Table Text Block] Deferred Revenue Deferred Revenue, by Arrangement, Disclosure [Table Text Block] New Accounting Pronouncement, Early Adoption New Accounting Pronouncement, Early Adoption [Table Text Block] Property, Plant and Equipment [Abstract] Property and Equipment Property, Plant and Equipment [Table Text Block] Deferred tax assets: Deferred Tax Assets, Net [Abstract] Stock-based compensation Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Share-based Compensation Cost Deferred revenue Deferred Tax Assets, Deferred Income Tax credits Deferred Tax Assets, Tax Credit Carryforwards Accrued expenses Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Accrued Liabilities Allowance for doubtful accounts and other reserves Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Allowance for Doubtful Accounts Less: valuation allowance Deferred Tax Assets, Valuation Allowance Total deferred tax assets Deferred Tax Assets, Net of Valuation Allowance Deferred tax liabilities: Deferred Tax Liabilities, Gross [Abstract] Depreciation and amortization Deferred Tax Liabilities, Deferred Expense, Depreciation and Amortization Deferred Tax Liabilities, Deferred Expense, Depreciation and Amortization Net deferred tax asset Deferred Tax Assets, Net 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] Equity Award [Domain] PSU Performance Restricted Stock Units [Member] Performance Restricted Stock Units [Member] Market performance shares Performance Shares [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 awards, granted (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period 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 Maximum potential for awards to vest (as a percent) 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 number of awards 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 Estimated number of awards to vest (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage Stock options granted, vesting period (in years) Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period 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 Accrued Liabilities Schedule of Accrued Liabilities [Table Text Block] Equity [Abstract] Schedule of Stock by Class [Table] Schedule of Stock by Class [Table] Class of Stock Class of Stock [Axis] Class of Stock [Domain] Class of Stock [Domain] Series A Junior Participating Preferred Series A Junior Participating Preferred Stock [Member] Series A Junior Participating Preferred Stock Member. Share Repurchase Program [Axis] Share Repurchase Program [Axis] Share Repurchase Program [Domain] Share Repurchase Program [Domain] Common Stock Repurchased Common Stock Repurchase Program [Member] Common Stock Repurchase Program [Member] Restricted Stock Units Restricted Stock Units (RSUs) [Member] Class of Stock [Line Items] Class of Stock [Line Items] Common stock, shares authorized (in shares) Common Stock, Shares Authorized Preferred stock, shares authorized (in shares) Preferred Stock, Shares Authorized Preferred stock, shares outstanding (in shares) Preferred Stock, Shares Outstanding Number of rights declared as dividend distribution for each outstanding share of common stock Number Of Right Declared As Dividend Distribution For Each Outstanding Share Of Common Stock Number of Right declared as dividend distribution for each outstanding share of common stock. Description of exercise entitlement of each right Description Of Exercise Entitlement Of Each Right Description of exercise entitlement of each right. Number of shares per Right (in shares) Number Of Shares For Right Number Of Shares For Right Conditions under which rights become exercisable Conditions Under Which Rights Become Exercisable Conditions under which rights become exercisable. Preferred stock, par value (in dollars per share) Preferred Stock, Par or Stated Value Per Share Exercise purchase price of preferred stock rights (in dollars per share) Preferred Stock Rights Exercise Price The exercise price per one one-thousandth of a share of Series A Junior Participating Preferred Stock. Period before rights become exercisable Period Before Rights Become Exercisable Period Before Rights Become Exercisable Minimum acquisition percentage of company stock needed for rights to become exercisable Class of Warrant or Right, Exercisable Event, Minimum Percent of Common Stock Acquired Class of Warrant or Right, Exercisable Event, Minimum Percent of Common Stock Acquired Redemption price of each right (in dollars per share) Redemption Price Of Each Right Redemption price of each Right. Expiration date of rights Expiration Date Of Rights Expiration date of Rights. Common stock, shares outstanding (in shares) Common Stock, Shares, Outstanding Common stock, par value (in dollars per share) Common Stock, Par or Stated Value Per Share Amount of common stock repurchased Stock Repurchased During Period, Value Number of shares repurchased (in shares) Stock Repurchased During Period, Shares Remaining value of common stock to be repurchased under share repurchase program Stock Repurchase Program, Remaining Authorized Repurchase Amount Options outstanding (in shares) Commitments and Contingencies Disclosure [Abstract] Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract] Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract] 2018 Operating Leases, Future Minimum Payments Due, Next Twelve Months 2019 Operating Leases, Future Minimum Payments, Due in Two Years 2020 Operating Leases, Future Minimum Payments, Due in Three Years 2021 Operating Leases, Future Minimum Payments, Due in Four Years 2022 and thereafter Operating Leases, Future Minimum Payments, Due in Five Years and Thereafter Operating Leases, Future Minimum Payments, Due in Five Years and Thereafter Future minimum lease payments, Total Operating Leases, Future Minimum Payments Due Compensation and Retirement Disclosure [Abstract] Company contributions to defined contribution plan Defined Benefit Plan, Contributions by Employer 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 Short-term Investments Trade accounts receivable, less allowance for doubtful accounts of $103 and $315 at March 31, 2017 and 2016, respectively Accounts Receivable, Net, Current Prepaid expenses and other current assets Other Assets, Current Total current assets Assets, Current Deferred tax assets, net Deferred Income Tax Assets, Net Property and equipment, net Property, Plant and Equipment, Net Equity method investment Equity Method Investments 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 Deferred revenue Deferred Revenue, Current Total current liabilities Liabilities, Current Deferred revenue, less current portion Deferred Revenue, Noncurrent Other liabilities Other Liabilities, Noncurrent Commitments and contingencies (Note 5) 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 March 31, 2017 and 2016 Preferred Stock, Value, Issued Common stock, $0.01 par value, 250,000 shares authorized, 44,816 shares and 44,134 shares issued and outstanding at March 31, 2017 and 2016, 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 Stockholders' Equity Attributable to Parent Total liabilities and stockholders’ equity Liabilities and Equity Income Statement [Abstract] Revenues: Sales Revenue, Services, Net [Abstract] Software Licenses Revenue Services Services Revenue Services Revenue derived from customer support revenue and other professional services. Customer support includes software updates on a when-and-if-available basis, telephone support and bug fixes or patches. Other Professional Services include consulting, assessment design services and installation services and training. Total revenues Revenues Cost of revenues: Cost of Services [Abstract] Software License Costs Services Cost Of Service Revenue Cost of generating revenue derived from customer support revenue and other professional services. Customer support includes software updates on a when and if available basis, telephone support and bug fixes or patches. Other Professional Services include consulting, assessment design services and installation services and training. Total cost of revenues Cost of Revenue 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 Depreciation and amortization Depreciation, Depletion and Amortization, Nonproduction Total operating expenses Operating Expenses Income (loss) from operations Operating Income (Loss) Interest expense Interest and Debt Expense Interest income Investment Income, Interest Equity in loss of affiliate Income (Loss) from Equity Method Investments Income (loss) before income taxes Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest Income tax expense (benefit) Income Tax Expense (Benefit) Net income (loss) Net income 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 Capitalization Capitalization [Text Block] Entities disclosure for capitalization. Summary of Significant Accounting Policies Significant Accounting Policies [Text Block] Stock options, restricted stock units, and shares under the employee stock purchase plan (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Income Tax Examination [Table] Income Tax Examination [Table] Income Tax Authority Income Tax Authority [Axis] Income Tax Authority [Domain] Income Tax Authority [Domain] U.S. Federal Domestic Tax Authority [Member] New Jersey State and Local Jurisdiction [Member] Foreign jurisdictions Foreign Tax Authority [Member] Range Range [Axis] Range [Domain] Range [Domain] Minimum Minimum [Member] Maximum Maximum [Member] Income Tax Examination [Line Items] Income Tax Examination [Line Items] Tax Years Subject to Income Tax Examination Open Tax Year Statement of Cash Flows [Abstract] Cash flows from operating activities Net Cash Provided by (Used in) Operating Activities [Abstract] Adjustments to reconcile net income 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 Compensation Excess tax benefits from stock-based compensation Excess Tax Benefit from Share-based Compensation, Operating Activities Deferred income taxes Deferred Income Tax Expense (Benefit) Equity in loss of affiliate Changes in operating assets and liabilities: Increase (Decrease) in Operating Capital [Abstract] Trade accounts receivable Increase (Decrease) in Accounts Receivable Other current assets and Other assets Increase (Decrease) in Other Operating Assets Accounts payable Increase (Decrease) in Accounts Payable Accrued liabilities Increase (Decrease) in Accrued Liabilities Deferred revenue Increase (Decrease) in Deferred Revenue 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 equity method investment Payments to Acquire Equity Method Investments Purchases for corporate campus headquarters Payments to Acquire Other Productive Assets Purchase of property and equipment Payments to Acquire Property, Plant, and Equipment Net cash 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 Debt issuance costs Payments of Debt Issuance Costs Proceeds from stock-based compensation plans Proceeds from Issuance of Shares under Incentive and Share-based Compensation Plans, Including Stock Options Excess tax benefits from stock-based compensation Excess Tax Benefit from Share-based Compensation, Financing Activities 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 and Cash Equivalents Net increase (decrease) in cash and cash equivalents Cash and Cash Equivalents, Period Increase (Decrease) Cash and cash equivalents at beginning of year Cash and cash equivalents at end of year Supplemental disclosures of cash flow information Supplemental Cash Flow Information [Abstract] Interest paid Interest Paid Income taxes paid, net Income Taxes Paid Purchases for corporate campus headquarters in accounts payable and accrued liabilities Capital Expenditures Incurred but Not yet Paid Schedule of Stock Option Valuation Assumptions Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] Schedule of Stock Option Activity Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block] Summary of Stock Options Outstanding Under Plan And LTIP Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range [Table Text Block] Schedule of Restricted Stock Unit Activity Schedule of Nonvested Restricted Stock Units Activity [Table Text Block] Stock-Based Compensation Expense Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table Text Block] Property and Equipment Property, Plant and Equipment Disclosure [Text Block] Future Minimum Lease Payments Under All Operating Leases Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block] Compensation and related payroll taxes Accrued Compensation And Related Payroll Tax Carry value of compensation and related payroll taxes for the period presented. Other Other Accrued Liabilities Total accrued liabilities Accrued Liabilities Employee Benefit Plan Pension and Other Postretirement Benefits Disclosure [Text Block] Income Tax Expense (Benefit), Continuing Operations [Abstract] Income Tax Expense (Benefit), Continuing Operations [Abstract] Domestic Income (Loss) from Continuing Operations before Income Taxes, Domestic Foreign Income (Loss) from Continuing Operations before Income Taxes, Foreign Schedule of Share based Compensation Arrangements by Share based Payment Award, Equity Instruments, Other Than Options, Restricted Stock Units [Table] Schedule Of Share Based Compensation Arrangements By Share Based Payment Award Equity Instruments Other Than Options Restricted Stock Units [Table] Schedule of Share based Compensation Arrangements by Share based Payment Award, Equity Instruments, Other Than Options, Restricted Stock Units [Table] Schedule of Share based Compensation Arrangements by Share based Payment Award, Equity Instruments, Other Than Options, Restricted Stock Units [Line Items] Schedule Of Share Based Compensation Arrangements By Share Based Payment Award Equity Instruments Other Than Options Restricted Stock Units [Line Items] Schedule of Share based Compensation Arrangements by Share based Payment Award, Equity Instruments, Other Than Options, Restricted Stock Units [Line Items] Number of Awards Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] Number of Awards, Non-vested beginning balance (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number Number of Awards, Granted (in shares) Number of Awards, Vested (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period Number of Awards, Forfeited (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period Number of Awards, Non-vested 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] Weighted Average grant Date Fair Value, Non-vested 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 Weighted Average grant Date Fair Value, Granted (in dollars per share) 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 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 Weighted Average grant Date Fair Value, Non-vested ending balance (in dollars per share) Earnings Per Share, Basic and Diluted [Abstract] Earnings Per Share, Basic and Diluted [Abstract] Basic net income per common share: Earnings Per Share, Basic [Abstract] Basic weighted average shares outstanding (shares) Basic net income per common share (in dollars per share) Diluted net income per common share: Earnings Per Share, Diluted [Abstract] Dilutive effect of stock options, restricted stock units, and employee stock purchase plan (in shares) Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements Diluted weighted average shares outstanding (in shares) Diluted net income per common share (in dollars per share) Stock Plans Disclosure of Compensation Related Costs, Share-based Payments [Text Block] Schedule of Property, Plant and Equipment [Table] Property, Plant and Equipment [Table] Property, Plant and Equipment, Type Property, Plant and Equipment, Type [Axis] Property, Plant and Equipment, Type [Domain] Property, Plant and Equipment, Type [Domain] Land Land [Member] Buildings Building [Member] Computers, servers and other equipment Computer Equipment [Member] Furniture and fixtures Furniture and Fixtures [Member] Leasehold improvements Leasehold Improvements [Member] Purchased software Computer Software, Intangible Asset [Member] Construction in process Construction in Progress [Member] Property, Plant and Equipment [Line Items] Property, Plant and Equipment [Line Items] Property and equipment, gross Property, Plant and Equipment, Gross Less: Accumulated depreciation and amortization Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Property and equipment, net Components of Income Tax Expense (Benefit), Continuing Operations [Abstract] Components of Income Tax Expense (Benefit), Continuing Operations [Abstract] 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) 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) Income tax expense (benefit) Debt Disclosure [Abstract] Revolving Credit Facility Debt Disclosure [Text Block] Depreciation and amortization expense Depreciation Summary Of Significant Accounting Policies [Table] Summary Of Significant Accounting Policies [Table] Summary Of Significant Accounting Policies [Table] Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Domain] Concentration Risk Benchmark [Domain] Revenue Sales Revenue, Net [Member] Accounts Receivable Accounts Receivable [Member] 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 [Member] Avent [Member] Investment, Name [Axis] Investment, Name [Axis] Investment, Name [Domain] Investment, Name [Domain] Laitek, Inc. Laitek, Inc. [Member] Laitek, Inc. [Member] Summary Of Significant Accounting Policies [Line Items] Summary Of Significant Accounting Policies [Line Items] Summary Of Significant Accounting Policies [Line Items] Number of sources of primary revenue Sources Of Primary Revenue The number of sources of revenue in a typical sales agreement. Length of customer support agreement (in years) Customer Support Agreement The typical length of Customer Support Agreements. Number of days for other professional services Timeframe Other Professional Services Are Performed After Entering Into Agreement Timeframe other professional services are generally performed after entering into an agreement. Net deferred tax assets Valuation allowance for deferred tax assets Deferred Tax Valuation Allowance Comprised Research Tax Credit The sum of the portions of deferred tax assets related to research tax credits as of the balance sheet date for which, based on the weight of available evidence, it is more likely than not will not be realized through future reductions of tax-based income. Unrecognized tax benefits which would favorably affect the effective tax rate once recognized Unrecognized Tax Benefits that Would Impact Effective Tax Rate Accrued interest and penalties Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued Concentration percentage Concentration Risk, Percentage Property and equipment, depreciation period (in years) Property, Plant and Equipment, Useful Life Asset retirement obligation Asset Retirement Obligation Asset impairment charges Asset Impairment Charges Ownership percentage of equity method investment Equity Method Investment, Ownership Percentage Advertising expenses Advertising Expense Net foreign currency transaction gain (loss) Foreign Currency Transaction Gain (Loss), before Tax Duration of forward contracts utilized for hedging, Minimum (in months) Minimum Term Period Forwards Contracts Utilized For Hedging In Months Minimum time period forward contracts generally utilized for hedging, in months Duration of forward contracts utilized for hedging, Maximum (in months) Maximum Term Period Forwards Contracts Utilized For Hedging In Months Maximum time period forward contracts generally utilized for hedging, in months. Net realized gains (losses) related to settlement of forward exchange contracts recorded in general and administrative expenses Gain (Loss) on Foreign Currency Derivative Instruments Not Designated as Hedging Instruments Deferred Revenue Arrangement, by Type [Table] Deferred Revenue Arrangement, by Type [Table] Deferred Revenue Arrangement Type Deferred Revenue Arrangement Type [Axis] Deferred Revenue Arrangement Type [Domain] Deferred Revenue [Domain] Deferred software revenue Software License Arrangement [Member] Deferred services revenue Deferred Services Revenue [Member] Deferred Services Revenue. Deferred Revenue Arrangement [Line Items] Deferred Revenue Arrangement [Line Items] Deferred revenue, Current Deferred services revenue Total Deferred Revenue Deferred Revenue New Accounting Pronouncement, Early Adoption [Table] New Accounting Pronouncement, Early Adoption [Table] Initial Application Period Cumulative Effect Transition [Axis] 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] [Domain] for Initial Application Period Cumulative Effect Transition [Axis] Difference between Revenue Guidance In Effect before And After Topic 606 Difference Between Revenue Guidance In Effect Before And After Topic 606 [Member] Difference Between Revenue Guidance In Effect before And After Topic 606 [Member] Scenario [Axis] Scenario [Axis] Scenario, Unspecified [Domain] Scenario, Unspecified [Domain] Pro Forma Pro Forma [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] New Accounting Pronouncement, Early Adoption [Line Items] New Accounting Pronouncement, Early Adoption [Line Items] Trade accounts receivable Unbilled receivables Unbilled Receivables, Current Total current assets Deferred commissions Contract With Customer, Asset, Net, Noncurrent Contract With Customer, Asset, Net, Noncurrent Total assets Total current liabilities Total stockholders’ equity Total liabilities and stockholders’ equity Tax Credit Carryforward [Table] Tax Credit Carryforward [Table] Tax Credit Carryforward Tax Credit Carryforward [Axis] Tax Credit Carryforward, Name [Domain] Tax Credit Carryforward, Name [Domain] Research Tax Credit Carryforward Research Tax Credit Carryforward [Member] Balance Sheet Location [Axis] Balance Sheet Location [Axis] Balance Sheet Location [Domain] Balance Sheet Location [Domain] Other Liabilities Other Liabilities [Member] Deferred Tax Assets Deferred Tax Assets [Member] Deferred Tax Assets [Member] Tax Credit Carryforward [Line Items] Tax Credit Carryforward [Line Items] Valuation allowances against deferred tax assets Decrease to valuation allowances against deferred tax assets Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount Cumulative unremitted foreign earnings Undistributed Earnings of Foreign Subsidiaries Tax benefits relating to share-based payments Adjustments to Additional Paid in Capital, Income Tax Benefit from Share-based Compensation Tax credit carryforwards Tax Credit Carryforward, Amount Tax credit carryforward, expiration year Tax Credit Carryforward Expiration Year Tax Credit Carryforward, Expiration Year Federal Alternative Minimum Tax credit carryforwards Deferred Tax Assets, Tax Credit Carryforwards, Alternative Minimum Tax Unrecognized Tax Benefits Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued [Abstract] Unrecognized tax benefits which would favorably affect the effective tax rate once recognized Unrecognized Tax Benefits Remaining unrecognized tax benefits Significant Change in Unrecognized Tax Benefits is Reasonably Possible, Amount of Unrecorded Benefit Interest and penalties Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense Number of Options Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] Number of Options, Outstanding beginning balance (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number Number of Options, Options granted (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures Number of Options, Options exercised (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period Number of Options, Options forfeited (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures in Period Number of Options, Options expired (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Expirations in Period Number of Options, Outstanding ending balance (in shares) Number of Options, Vested or expected to vest at March 31, 2017 (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Number Number of Options, Exercisable at March 31, 2017 (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number Weighted- Average Exercise Price Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract] Weighted-Average Exercise Price, Outstanding beginning balance (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price Weighted-Average Exercise Price, Options granted (in dollars per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price Weighted-Average Exercise Price, Options exercised (in dollars per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price Weighted-Average Exercise Price, Options forfeited (in dollars per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Forfeitures in Period, Weighted Average Exercise Price Weighted-Average Exercise Price, Options expired (in dollars per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Expirations in Period, Weighted Average Exercise Price Weighted-Average Exercise Price, Outstanding ending balance (in dollars per share) Weighted-Average Exercise Price, Vested or expected to vest at March 31, 2017 (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Exercise Price Weighted-Average Exercise Price, Exercisable at March 31, 2017 (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price Weighted- Average Remaining Contractual Term (Years) Share Based Compensation Arrangement By Share Based Payment Award Other Than Options Weighted Average Remaining Contractual Term [Abstract] Share based Compensation Arrangement by Share based Payment Award, Other than Options, Weighted Average Remaining Contractual Term [Abstract] Weighted-Average Remaining Contractual Term, Outstanding at March 31, 2017 (in years) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term Weighted-Average Remaining Contractual Term, Vested or expected to vest at March 31, 2017 (in years) Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Remaining Contractual Term Weighted-Average Remaining Contractual Term, Exercisable at March 31, 2017 (in years) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term Aggregate Intrinsic Value Share Based Compensation Arrangement By Share Based Payment Award Options Aggregate Intrinsic Value [Abstract] Share-based Compensation Arrangement by Share-based Payment Award, Options, Aggregate Intrinsic Value [Abstract] Aggregate Intrinsic Value, Outstanding at March 31, 2017 Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value Aggregate Intrinsic Value, Vested or expected to vest at March 31, 2017 Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Aggregate Intrinsic Value Aggregate Intrinsic Value, Exercisable at March 31, 2017 Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value Statement of Stockholders' Equity [Abstract] Statement [Table] Statement [Table] Equity Components 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] 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, Outstanding Beginning Balance Stock-based compensation Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition Share issuances related to stock-based compensation (in shares) Stock Issued During Period, Shares, Share-based Compensation, Net of Forfeitures Share issuances related to stock-based compensation Stock Issued During Period, Value, Share-based Compensation, Net of Forfeitures Repurchase of common stock (in shares) Repurchase of common stock Other comprehensive loss Other Comprehensive Income (Loss), Net of Tax Ending Balance (in shares) Ending Balance Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table] Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table] Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs, by Report Line Income Statement Location [Axis] Employee Service Share-based Compensation, Allocation of Recognized Period Costs, Report Line [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] Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items] Stock-based compensation expense Allocated Share-based Compensation Expense Quarterly Financial Information Disclosure [Abstract] Schedule of Selected Quarterly Financial Data Quarterly Financial Information [Table Text Block] Reconciliation of Assets from Segment to Consolidated [Table] Reconciliation of Assets from Segment to Consolidated [Table] Geographical Geographical [Axis] Segment, Geographical [Domain] Geographical [Domain] United States UNITED STATES Other Non-US [Member] Segment Reporting, Asset Reconciling Item [Line Items] Segment Reporting, Asset Reconciling Item [Line Items] Long-lived assets Long-Lived Assets Plan Name [Axis] Plan Name [Axis] Plan Name [Domain] Plan Name [Domain] 2016 Incentive Plan 2016 Incentive Plan [Member] 2016 Incentive Plan [Member] 2006 Long-Term Stock Inventive Plan 2006 Long-Term Stock Inventive Plan [Member] 2006 Long-Term Stock Inventive Plan [Member] Stock Incentive Plan Stock Incentive Plan [Member] Stock Incentive Plan [Member] Equity Awards Equity Awards [Member] Equity Awards [Member] Number of stock incentive plans Share-based Compensation Arrangement by Share-based Payment Award, Stock Incentive Plans Share-based Compensation Arrangement by Share-based Payment Award, Stock Incentive Plans Options available for future grant (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant Unrecognized stock-based compensation expense Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized Awards expected to be recognized over a weighted average period (in years) Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition Weighted average fair value of stock options granted per share (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value Total intrinsic value of options exercised Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value Total fair value of restricted stock units - vested Fair Value Of Restricted Stock Units Vested Total Fair value of restricted stock units vested total. Recognized tax benefit related to stock-based compensation Employee Service Share-based Compensation, Tax Benefit from Compensation Expense Total cost of revenues Total operating expenses Selected Quarterly Financial Data (unaudited) Quarterly Financial Information [Text Block] Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Number of reportable segments Number of Operating Segments Percentage of revenues below which countries other than the U.S. account for Entity Wide Revenue Criteria For Major Customer Percentage Of Revenue Entity-wide revenue, criteria for individual countries, percentage of revenue. Percentage of long-lived assets Entity Wide Long Lived Assets Criteria For Major Customer Percentage Of Long Lived Assets Entity-wide long-lived asset, criteria for individual countries, percentage of long-lived assets. Fair Value Measurements, Recurring and Nonrecurring [Table] Fair Value Measurements, Recurring and Nonrecurring [Table] Fair Value, Hierarchy [Axis] Fair Value, Hierarchy [Axis] Fair Value Hierarchy [Domain] Fair Value Hierarchy [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 Held-to-maturity Securities, Fair Value Total revenue Gross margin Net income (loss) Net income (loss) per common share: Segment Information Segment Reporting Disclosure [Text Block] Purchase Plan Employee Stock [Member] Purchase price as a percentage of fair market value Share-based Compensation Arrangement by Share-based Payment Award, Purchase Price of Common Stock, Percent Length of offering period (in months) Share-based Compensation Arrangement by Share-based Payment Award, Offering Period Share-based Compensation Arrangement by Share-based Payment Award, Offering Period Maximum employee payroll percent deduction of salary (as a percent) Share-based Compensation Arrangement by Share-based Payment Award, Maximum Employee Subscription Rate 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 Number of shares purchased by employees (in shares) Stock Issued During Period, Shares, Employee Stock Purchase Plans Proceeds received Proceeds from Stock Plans Compensation expense Basis of Presentation Basis of Accounting, Policy [Policy Text Block] Use of Estimates Use of Estimates, Policy [Policy Text Block] Revenue Recognition Revenue Recognition, Policy [Policy Text Block] Net Income per Common Share Earnings Per Share, Policy [Policy Text Block] Software Development Costs Research, Development, and Computer Software, Policy [Policy Text Block] Accounts Receivable and Allowance for Doubtful Accounts Receivables, Policy [Policy Text Block] Accounting for Income Taxes Income Tax, Policy [Policy Text Block] Cash and Cash Equivalents Cash and Cash Equivalents, Policy [Policy Text Block] Short-term Investments Marketable Securities, 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] Property and Equipment Property, Plant and Equipment, Policy [Policy Text Block] Asset Retirement Obligation Asset Retirement Obligations, Policy [Policy Text Block] Long-Lived Assets Impairment or Disposal of Long-Lived Assets, Policy [Policy Text Block] Equity Method Investment Equity Method Investments, Policy [Policy Text Block] Deferred Revenue Revenue Recognition, Deferred Revenue [Policy Text Block] Accounting for Stock-Based Compensation Compensation Related Costs, Policy [Policy Text Block] Share Repurchases Stock Repurchases Policy [Policy Text Block] Describes an entities policy for shares repurchased under its stock plan. Sales Tax Sales Tax Policy [Policy Text Block] Disclosure of accounting policy for sales tax, including whether the costs are included in revenue. Advertising Costs Advertising Costs, Policy [Policy Text Block] Shipping and Handling Costs Shipping and Handling Cost, Policy [Policy Text Block] Foreign Currency Translation Foreign Currency Transactions and Translations Policy [Policy Text Block] Comprehensive Income (Loss) Comprehensive Income, Policy [Policy Text Block] Recently Issued Accounting Standards New Accounting Pronouncements, Policy [Policy Text Block] Allowance for doubtful trade accounts receivable Allowance for Doubtful Accounts Receivable, Current Preferred stock, shares issued (in shares) Preferred Stock, Shares Issued Common stock, shares issued (in shares) Common Stock, Shares, Issued Nature of Business Nature of Operations [Text Block] Rent expenses Operating Leases, Rent Expense Non-cancellable purchase commitments, 2018 Recorded Unconditional Purchase Obligation Due in Next Twelve Months Non-cancellable purchase commitments, 2019 Recorded Unconditional Purchase Obligation Due in Second Year Non-cancellable purchase commitments, 2020 Recorded Unconditional Purchase Obligation Due in Third Year Non-cancellable purchase commitments, 2021 Recorded Unconditional Purchase Obligation Due in Fourth Year Non-cancellable purchase commitments, Total for all periods through fiscal 2021 Recorded Unconditional Purchase Obligation Royalty expense Royalty Expense Maximum software warranty period (in days) Maximum Software Warranty Period Maximum software warranty period. Product warranty accrual Standard and Extended Product Warranty Accrual Loss Contingencies [Table] Loss Contingencies [Table] Litigation Case [Axis] Litigation Case [Axis] Litigation Case [Domain] Litigation Case [Domain] Realtime Data LLC d/b/a IXO Realtime Data LLC d/b/a IXO [Member] Realtime Data LLC d/b/a IXO [Member] Loss Contingencies [Line Items] Loss Contingencies [Line Items] Number of patents involved in alleged infringement Loss Contingency, Patents Allegedly Infringed, Number Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward] Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward] Beginning balance Additions for tax positions related to current fiscal period Unrecognized Tax Benefits, Increase Resulting from Current Period Tax Positions Additions for tax positions related to prior years Unrecognized Tax Benefits, Increase Resulting from Prior Period Tax Positions Settlements and effective settlements with tax authorities and remeasurements Unrecognized Tax Benefits, Decrease Resulting from Settlements with Taxing Authorities Reductions related to the expiration of statutes of limitations Unrecognized Tax Benefits, Reduction Resulting from Lapse of Applicable Statute of Limitations Decrease resulting from foreign currency translation adjustment Unrecognized Tax Benefits, Decrease Resulting from Foreign Currency Translation Increase resulting from foreign currency translation adjustment Unrecognized Tax Benefits, Increase Resulting from Foreign Currency Translation Ending balance Line of Credit Facility [Table] Line of Credit Facility [Table] Credit Facility [Axis] Credit Facility [Axis] Credit Facility [Domain] Credit Facility [Domain] Revolving Credit Facility Revolving Credit Facility [Member] Variable Rate [Axis] Variable Rate [Axis] Variable Rate [Domain] Variable Rate [Domain] LIBOR London Interbank Offered Rate (LIBOR) [Member] Line of Credit Facility [Line Items] Line of Credit Facility [Line Items] Term (in years) Debt Instrument, Term Borrowing capacity Line of Credit Facility, Maximum Borrowing Capacity Variable rate (percent) Debt Instrument, Basis Spread on Variable Rate Commitment fee percentage Line of Credit Facility, Unused Capacity, Commitment Fee Percentage Outstanding borrowings under credit facility Long-term Line of Credit Unamortized debt issuance expense Unamortized Debt Issuance Expense Amortization of debt issuance expense Amortization of Debt Issuance Costs Income Taxes Income Tax Disclosure [Text Block] Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Schedule of Long-Lived Assets by Geographical Areas [Table] Schedule Of Long Lived Assets By Geographical Areas [Table] Schedule of Long-Lived Assets by Geographical Areas [Table] Segment Reporting, Revenue Reconciling Item [Line Items] Segment Reporting, Revenue Reconciling Item [Line Items] Revenue