Document and Entity Information Abstract. Document And Entity Information [Abstract] Statement [Table] Statement [Line Items] Entity Registrant Name Entity Central Index Key Document Type Document Period End Date Amendment Flag Current Fiscal Year End Date Entity Current Reporting Status Entity Filer Category Entity Common Stock, Shares Outstanding Document Fiscal Year Focus Document Fiscal Period Focus Consolidated Balance Sheets [Abstract] Assets [Abstract] Assets Assets, Current [Abstract] Current assets: Cash and Cash Equivalents, at Carrying Value Cash and cash equivalents at end of period Cash and cash equivalents at beginning of period Cash and Cash Equivalents, at Carrying Value, Total Cash and cash equivalents Short-term Investments Short-term Investments, Total Short-term investments Accounts Receivable, Net, Current Accounts Receivable, Net, Current, Total Trade accounts receivable, less allowance for doubtful accounts of $110 at September 30, 2011 and $106 at March 31, 2011 Other Assets, Current Prepaid expenses and other current assets Deferred Tax Assets, Net, Current Deferred Tax Assets, Net, Current, Ending Balance Deferred Tax Assets, Net, Current, Beginning Balance Deferred tax assets, net Deferred tax assets Assets, Current Assets, Current, Total Total current assets Total current assets Deferred Tax Assets, Net, Noncurrent Deferred Tax Assets, Net, Noncurrent, Total Deferred tax assets, net Property, Plant and Equipment, Net Property, Plant and Equipment, Net, Ending Balance Property, Plant and Equipment, Net, Beginning Balance Property, Plant and Equipment, Net, Total Property and equipment, net Other Assets, Noncurrent Other assets Other assets Assets Total assets Liabilities and Stockholders' Equity [Abstract] Liabilities and stockholders' equity Liabilities, Current [Abstract] Current liabilities: Accounts Payable, Current Accounts Payable, Current, Total Accounts payable Accrued Liabilities, Current Accrued Liabilities, Current, Total Accrued liabilities Deferred Revenue, Current Deferred revenue, current Deferred revenue Deferred revenue Liabilities, Current Liabilities, Current, Total Total current liabilities Total current liabilities Deferred Revenue, Noncurrent Deferred revenue, non-current Deferred Revenue, Noncurrent, Total Deferred revenue, less current portion Other Liabilities, Noncurrent Other Liabilities, Noncurrent, Total Other liabilities Stockholders' Equity Attributable to Parent [Abstract] Stockholders' equity: Preferred Stock, Value, Issued Preferred Stock, Value, Issued, Ending Balance Preferred Stock, Value, Issued, Beginning Balance Preferred Stock, Value, Issued, Total Preferred stock, $0.01 par value: 50,000 shares authorized, no shares issued and outstanding at September 30, 2011 and March 31, 2011 Common Stock, Value, Issued Common Stock, Value, Issued, Ending Balance Common Stock, Value, Issued, Beginning Balance Common Stock, Value, Issued, Total Common stock, $0.01 par value: 250,000 shares authorized, 43,343 shares and 43,965 shares issued and outstanding at September 30, 2011 and March 31, 2011, respectively Additional Paid in Capital, Common Stock Additional Paid in Capital, Common Stock, Ending Balance Additional Paid in Capital, Common Stock, Beginning Balance Additional paid-in capital Retained Earnings (Accumulated Deficit) Retained Earnings (Accumulated Deficit), Ending Balance Retained Earnings (Accumulated Deficit), Beginning Balance Retained Earnings (Accumulated Deficit), Total Accumulated deficit Accumulated Other Comprehensive Income (Loss), Net of Tax Accumulated Other Comprehensive Income (Loss), Net of Tax, Ending Balance Accumulated Other Comprehensive Income (Loss), Net of Tax, Beginning Balance Accumulated other comprehensive income Accumulated other comprehensive income (loss) Accumulated other comprehensive income (loss) Stockholders' Equity Attributable to Parent Balance Balance Total stockholders' equity Liabilities and Stockholders' Equity Total liabilities and stockholders' equity Allowance for Doubtful Accounts Receivable, Current Allowance for Doubtful Accounts Receivable, Current, Ending Balance Allowance for Doubtful Accounts Receivable, Current, Beginning Balance Allowance for doubtful trade accounts receivable Preferred Stock, Par or Stated Value Per Share Preferred stock, par value Preferred Stock, Shares Authorized Preferred stock, shares authorized Preferred Stock, Shares Issued Preferred Stock, Shares Issued, Total Preferred stock, shares issued Preferred Stock, Shares Outstanding Preferred Stock, Shares Outstanding, Ending Balance Preferred Stock, Shares Outstanding, Beginning Balance Preferred stock, shares outstanding Common Stock, Par or Stated Value Per Share Common stock, par value Common Stock, Shares Authorized Common stock, shares authorized Common Stock, Shares, Issued Common Stock, Shares, Issued, Total Common stock, shares issued Common Stock, Shares, Outstanding Balance, shares Balance, shares Common stock, shares outstanding Consolidated Statements Of Income [Abstract] Sales Revenue, Services, Net [Abstract] Revenues: Licenses Revenue Software 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. Services Revenue Services Services Revenues Total revenues Total revenues Cost of Services [Abstract] Cost of revenues: License Costs Software 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. Cost of Service Revenue Services Services Cost of Revenue Total cost of revenues Gross Profit Gross margin Gross margin Operating Expenses [Abstract] Operating expenses: Selling and Marketing Expense Selling and Marketing Expense, Total Sales and marketing Research and Development Expense Research and Development Expense, Total Research and development General and Administrative Expense General and Administrative Expense, Total General and administrative Depreciation, Depletion and Amortization, Nonproduction Depreciation and amortization Depreciation and amortization Operating Income (Loss) Income from operations Income from operations Interest and Debt Expense Interest expense Interest and Debt Expense, Total Investment Income, Interest Interest income Interest income Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Cumulative Effects of Changes in Accounting Principles, Noncontrolling Interest Income before income taxes Income before income taxes Income Tax Expense (Benefit) Income tax expense Income tax expense Income tax expense Income Tax Expense (Benefit), Total Income tax expense Net Income (Loss) Attributable to Parent Net income Net income Earnings Per Share [Abstract] Computation of basic and diluted net income per common share Net income per common share: Earnings Per Share, Basic Basic Basic Basic net income per common share Earnings Per Share, Diluted Diluted Diluted Diluted net income per common share Weighted Average Number of Shares Outstanding, Diluted [Abstract] Weighted average common shares outstanding: Weighted Average Number of Shares Outstanding, Basic Basic Basic Basic weighted average shares outstanding Weighted Average Number of Shares Outstanding, Diluted Diluted Diluted weighted average shares outstanding Diluted weighted average shares outstanding Consolidated Statement Of Stockholders' Equity [Abstract] Statement, Equity Components [Axis] Common Stock [Member] Additional Paid-In Capital [Member] Additional Paid-In Capital Accumulated Deficit [Member] Accumulated Deficit [Member] Accumulated Other Comprehensive Income [Member] Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition, Value Stock-based compensation Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition, Total Stock-based compensation expense Adjustments to Additional Paid in Capital, Tax Effect from Share-based Compensation Tax benefits relating to share based payments Stock Issued During Period, Value, Share-based Compensation Stock Issued During Period, Value, Share-based Compensation, Net of Forfeitures, Total Exercise of common stock options and vesting of restricted stock units Stock Issued During Period, Shares, Share-based Compensation Stock Issued During Period, Shares, Share-based Compensation, Net of Forfeitures, Total Exercise of common stock options and vesting of restricted stock units, shares Stock Repurchased During Period, Value Repurchase of common stock Reduction in common stock, additional paid-in capital and accumulated deficit due to stock repurchase Repurchase of common stock, Value Stock Repurchased During Period, Shares Repurchase of common stock, shares Repurchase of common stock, shares Other Comprehensive Income, Foreign Currency Transaction and Translation Adjustment, Net of Tax Foreign currency translation adjustment Foreign currency translation adjustment Foreign currency translation adjustment Consolidated Statements Of Cash Flows [Abstract] Net Cash Provided by (Used in) Operating Activities [Abstract] Cash flows from operating activities Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Adjustments to reconcile net income to net cash provided by operating activities: Depreciation, Depletion and Amortization Depreciation, Depletion and Amortization, Total Depreciation and amortization Share-based Compensation Stock-based compensation expense Share-based Compensation, Total Noncash stock-based compensation Excess Tax Benefit from Share-based Compensation, Operating Activities Excess tax benefits from stock-based compensation Excess tax benefits from stock-based compensation Deferred Income Tax Expense (Benefit) Deferred Income Tax Expense (Benefit), Total Deferred income taxes Increase (Decrease) in Operating Capital [Abstract] Changes in operating assets and liabilities: Increase (Decrease) in Accounts Receivable Trade accounts receivable Trade Accounts receivable Increase (Decrease) in Prepaid, Deferred Expense and Other Assets Prepaid expenses and other current assets Increase (Decrease) in Prepaid, Deferred Expense and Other Assets, Total Prepaid expenses and other current assets Increase (Decrease) in Other Operating Assets Other assets Increase (Decrease) in Other Operating Assets, Total Other assets Increase (Decrease) in Accounts Payable Increase (Decrease) in Accounts Payable, Total Accounts payable Increase (Decrease) in Accrued Liabilities Increase (Decrease) in Accrued Liabilities, Total Accrued liabilities Increase (Decrease) in Deferred Revenue Deferred revenue Increase (Decrease) in Other Operating Liabilities Other liabilities Other liabilities Net Cash Provided by (Used in) Operating Activities Net cash provided by operating activities Net cash provided by operating activities Net Cash Provided by (Used in) Investing Activities [Abstract] Cash flows from investing activities Payments to Acquire Short-term Investments Purchase of short-term investments Proceeds from Sale of Short-term Investments Proceeds from maturity of short-term investments Payments to Acquire Property, Plant, and Equipment Purchase of property and equipment Purchase of property and equipment Payments to Acquire Property, Plant, and Equipment, Total Payments to Acquire Property, Plant, and Equipment, Total Net Cash Provided by (Used in) Investing Activities Net cash used in investing activities Net cash used in investing activities Net Cash Provided by (Used in) Financing Activities [Abstract] Cash flows from financing activities Payments for Repurchase of Common Stock Repurchase of common stock Repurchase of comman stock under share repurchase programme Proceeds from Stock Options Exercised Proceeds from the exercise of stock options Excess Tax Benefit from Share-based Compensation, Financing Activities Excess tax benefits from stock-based compensation Excess tax benefits from stock-based compensation Excess tax benefits recognized as a financing cash inflow Net Cash Provided by (Used in) Financing Activities Net cash used in financing activities Net cash provided by (used in) financing activities Effect of Exchange Rate on Cash and Cash Equivalents Effects of exchange rate - changes in cash Effects of exchange rate - changes in cash Cash and Cash Equivalents, Period Increase (Decrease) Net increase (decrease) in cash and cash equivalents Net increase in cash and cash equivalents Nature Of Business Abstract. Nature Of Business [Abstract] Nature of Operations [Text Block] Nature Of Business Basis Of Presentation [Abstract] Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] Basis Of Presentation Summary of Significant Accounting Policies Abstract. Summary Of Significant Accounting Policies [Abstract] Significant Accounting Policies [Text Block] Summary Of Significant Accounting Policies Credit Facility [Abstract] Debt Disclosure [Text Block] Credit Facility Contingencies [Abstract] Contingencies [Abstract] Schedule of Loss Contingencies by Contingency [Text Block] Contingencies Capitalization [Abstract] Capitalization [Abstract] Schedule of Capitalization [Text Block] Capitalization Stock Plans [Abstract] Stock Plans [Abstract] Disclosure of Compensation Related Costs, Share-based Payments [Text Block] Stock Plans Income Taxes [Abstract] Income Tax Disclosure [Text Block] Income Taxes Subsequent Events [Abstract] Subsequent Events [Text Block] Subsequent Events Use Of Estimates Policy Text Block Use Of Estimates Revenue Recognition, Policy [Text Block] Revenue Recognition Earnings Per Share, Policy [Text Block] Net Income Per Common Share Cash and Cash Equivalents, Policy [Text Block] Cash And Cash Equivalents Describes an entity's concentration of credit risk including the percentage of concentration as of the balance sheet date. Concentration Of Credit Risk Policy Text Block Concentration Of Credit Risk Disclosure of accounting policy for determining the fair value of financial instruments. Fair Value Of Financial Instruments Policy Text Block Fair Value Of Financial Instruments Description of type of arrangements and the corresponding amount that comprise the current and noncurrent balance of deferred revenue as of the balance sheet date. Revenue Recognition Deferred Revenue Policy Text Block Deferred Revenue Compensation Related Costs, Policy [Text Block] Accounting For Stock-Based Compensation Describes an entity's policy for shares repurchased under its stock repurchasing plan. Share Repurchases Policy Text Block Share Repurchases Describes an entity's components and calculation of comprehensive income. Comprehensive Income Policy Text Block Comprehensive Income Foreign Currency Transactions and Translations Policy [Text Block] Foreign Currency Translation Earnings Per Share [Text Block] Computation Of Basic And Diluted Net Income Per Common Share Computation of basic and diluted net income per common share Fair Value, Assets Measured on Recurring Basis [Text Block] Financial Assets Measured At Fair Value On Recurring Basis Financial assets measured at fair value on a recurring basis Deferred Revenue, by Arrangement, Disclosure [Text Block] Deferred Revenue Comprehensive Income Note [Text Block] Comprehensive Income Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions And Methodology. Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions And Methodology Text Block Schedule Of Stock Option Valuation Assumptions Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Text Block] Stock-Based Compensation Expense Share Based Compensation Arrangement By Share Based Payment Award Options Activity. Share Based Compensation Arrangement By Share Based Payment Award Options Activity Text Block Summarizes Activity of Two Stock Incentive Plans Schedule Of Stock Option Activity Restricted stock unit activity. Restricted Stock Unit Activity Text Block Restricted Stock Unit Activity Schedule Of Restricted Stock Unit Activity Reconciliation Of Unrecognized Tax Benefits Excluding Amounts Pertaining To Examined Tax Returns Text Block. Reconciliation Of Unrecognized Tax Benefits Excluding Amounts Pertaining To Examined Tax Returns Text Block Reconciliation of the Beginning and Ending Amounts of Unrecognized Tax Benefits Schedule Of Changes In Unrecognized Tax Benefits This disclosure is a description of tax years that remain subject to examination by major tax jurisdictions. Schedule Of Tax Years Subject To Income Tax Examination [Table Text Block] Tax Years Subject To Income Tax Examination Timeframe other professional services are generally performed after entering into an agreement. Timeframe other professional services are performed after entering into an agreement Timeframe other professional services are performed after entering into an agreement (in days) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Outstanding stock options and restricted stock units excluded from diluted weighted average shares outstanding Percentage of sales in respect of total revenue through companies reseller and OEM Agreement. Percentage Of Sales In Respect Of Total Revenue Through Companies Reseller And OEM Agreement Percentage of sales in respect of total revenue through companies reseller and OEM Agreement Percentage of sales in respect of total revenue through companies reseller agreement. Percentage Of Sales In Respect Of Total Revenue Through Companies Reseller Agreement Percentage of sales in respect of total revenue through companies reseller agreement Percentage of accounts receivable. Percentage Of Accounts Receivable Percentage of accounts receivable Reduction of Common Stock and Additional Paid-in Capital as Result of Common Stock Repurchases Reduction of Common Stock and Additional Paid-in Capital as Result of Common Stock Repurchases Reduction of common stock and additional paid-in capital as result of common stock repurchases Reduction Of Accumulated Deficit As Result Of Common Stock Repurchases Reduction Of Accumulated Deficit As Result Of Common Stock Repurchases Reduction of accumulated deficit as result of common stock repurchases Time Period forward contracts generally utilized for hedging in months. Term Period Forward Contracts Utilized For Hedging In Months Duration of forward contracts utilized for hedging (in months) Foreign Currency Transaction Gain, before Tax Net foreign currency transaction gains Net foreign currency transaction gain Foreign Currency Transaction Loss, before Tax Net foreign currency transaction losses Net foreign currency transaction losses Gain (Loss) on Foreign Currency Derivative Instruments Not Designated as Hedging Instruments Net realized gain related to settlement of forward exchange contracts recorded in general and administrative expenses Incremental Common Shares Attributable to Share-based Payment Arrangements Dilutive effect of stock options and restricted stock units Dilutive effect of stock options and restricted stock units Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Table] Fair Value by Measurement Frequency [Axis] Fair Value, Measurement Frequency [Domain] Fair Value, Measurements, Recurring [Member] Fair Value, Hierarchy [Axis] Fair Value, Measurements, Fair Value Hierarchy [Domain] Level 1 [Member] Cash and Cash Equivalents, Fair Value Disclosure Money market funds Deferred Revenue Arrangement, by Type [Table] Deferred Revenue Arrangement Type [Axis] Deferred Revenue Arrangement Type [Domain] Software [Member] Software [Member] Deferred Services Revenue. Deferred Services Revenue Member Services [Member] Services [Member] Comprehensive Income, Net of Tax, Attributable to Parent Total comprehensive income Line of Credit Facility, Maximum Borrowing Capacity Maximum borrowing capacity under amended and restated credit facility Line of Credit Facility, Expiration Date Maturity date of repayment of principal amount under credit facility Line of Credit Facility, Interest Rate Description Interest rate for borrowings under the amended and restated credit facility Line of Credit Facility, Commitment Fee Description Rate of quarterly commitment fee for the unused portion of the amended and restated credit facility Line of Credit Facility, Amount Outstanding Outstanding balance under amended credit facility Schedule of Stock by Class [Table] Class of Stock [Axis] Class of Stock [Domain] Series A Junior Participating Preferred Member. Seriesa Junior Participating Preferred Member Series A Junior Participating Preferred [Member] Series A Junior Participating Preferred [Member] Stock Repurchase Program Authorized Amount Maximum amount authorized for repurchase of common stock under share repurchase program Increase in Amount Authorized for Repurchase of Common Stock Under Share Repurchase Program Increase in Amount Authorized for Repurchase of Common Stock Under Share Repurchase Program Increase in amount authorized for repurchase of common stock under share repurchase program Value of Common Stock Repurchased Under Share Repurchase Program Value of Common Stock Repurchased Under Share Repurchase Program Value of common stock repurchased under share repurchase program Remaining Value of Common Stock allowed to be Repurchased Under Share Repurchase Program. Remaining Value of Common Stock to be Repurchased Under Share Repurchase Program Remaining value of common stock to be repurchased under share repurchase program 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 Number of rights 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 Conditions under which rights become exercisable. Conditions under which rights become exercisable Conditions under which rights become exercisable Redemption price of each right. Redemption price of each right Redemption price of each right Expiration date of rights. Expiration date of rights Expiration date of rights Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-based Compensation Arrangement by Share-based Payment Award, Award Type and Plan Name [Axis] Share-based Compensation Arrangements by Share-based Payment Award, Award Type and Plan Name [Domain] Nineteen ninety six Stock Option Plan [Member] Nineteen Ninety Six Stock Option Plan Member 1996 Stock Option Plan [Member] Two Thousand six Long-Term Stock Incentive Plan [Member] Two Thousand Six Long Term Stock Incentive Plan Member 2006 Long-Term Stock Incentive Plan [Member] Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized Grant non-qualified stock options Share-based Compensation Arrangement by Share-based Payment Award, Award Expiration Dating Expiration term of stock options granted at the discretion of board from the date of the grant (in years) Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Available For Grant Is Increased If Applicable. Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Available For Grant Is Increased If Applicable Percentage of outstanding shares available for awards under the LTIP as of any April 1st Percentage of shares available for awards under the LTIP Employee Service Share-based Compensation, Unrecognized Compensation Costs on Nonvested Awards Unrecognized stock-based compensation expense, net of estimated forfeitures Employee Service Share-based Compensation, Unrecognized Compensation Costs on Nonvested Awards, Weighted Average Period of Recognition Awards expected to be recognized over a weighted average period (in years) Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value Weighted average fair value of stock options granted per share Aggregate Intrinsic Value, Options exercised Total intrinsic value of options exercised Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant Options available for future grant Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate Dividend yield Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate Expected volatility Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate, Minimum Expected volatility, minimum Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate, Maximum Expected volatility, maximum Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Weighted Average Volatility Rate Weighted average expected volatility Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate, Minimum Risk-free interest rates, minimum Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate, Maximum Risk-free interest rates, maximum Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term Expected life (in years) 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 [Axis] Employee Service Share-based Compensation, Allocation of Recognized Period Costs, Report Line [Domain] Cost of services revenue Member. Cost Of Services Revenue Member Cost Of Services Revenue [Member] Cost of services revenue [Member] Sales And Marketing [Member] Sales and marketing [Member] Research And Development [Member] Research and development [Member] General And Administrative [Member] General and administrative [Member] Allocated Share-based Compensation Expense Allocated Share-based Compensation Expense, Total Stock-based compensation expense Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number Number of Options, Outstanding as of September 30, 2011 Number of Options, Outstanding as of March 31, 2011 Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period Stock options granted Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures, Total Number of Options, Options granted Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period Number of Options, Options exercised Number of Option exercised Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures in Period Number of Options, Options forfeited Number of Option forfeited Number of Option forfeited Share-based Compensation Arrangement by Share-based Payment Award, Options, Expirations in Period Number of Options, Options expired Number of Option expired Number of Option expired Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Number Number of Options, Vested or expected to vest as of September 30, 2011 Numberof Option Vested or expected to vest as of December 31, 2010 Vested or expected to vest as of December?31, 2010 Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number Number of Options, Exercisable as of September 30, 2011 Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price Weighted-Average Exercise Price, Outstanding as of September 30, 2011 Weighted-Average Exercise Price, Outstanding as of March 31, 2011 Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price Weighted-Average Exercise Price, Options granted Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price Weighted-Average Exercise Price, Options exercised Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures in Period, Weighted Average Exercise Price Weighted-Average Exercise Price, Options forfeited Share-based Compensation Arrangement by Share-based Payment Award, Options, Expirations in Period, Weighted Average Exercise Price Weighted-Average Exercise Price, Options expired Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Exercise Price Weighted-Average Exercise Price, Vested and Expected to Vest as of December 31, 2010 Weighted-Average Exercise Price, Vested or Expected to Vest as of September 30, 2011 Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price Weighted - Average Exercise Price, Exercisable as of December 31, 2010 Weighted-Average Exercise Price, Exercisable as of September 30, 2011 Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term Weighted-Average Remaining Contractual Term (Years), Outstanding as of September 30, 2011 Weighted-Average Remaining Contractual Term (Years), Outstanding as of March 31, 2011 Weighted-Average Remaining Contractual Term, Options outstanding as of December 31, 2010 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 (Years), Vested or expected to vest as of September 30, 2011 Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term Weighted-Average Remaining Contractual Term (Years), Exercisable as of September 30, 2011 Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value Aggregate Intrinsic Value, Outstanding as of September 30, 2011 Aggregate Intrinsic Value, Outstanding as of March 31, 2011 Aggregate Intrinsic Value, Options outstanding as of December 31, 2010 Aggregate Intrinsic Value, Options outstanding as of December 31, 2010 Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Aggregate Intrinsic Value Aggeregate Intrinsic Value Vested or expected to vest as of December 31, 2010 Aggregate Intrinsic Value, Vested or expected to vest as of September 30, 2011 Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value Aggregate Intrinsic Value, Exercisable as of September 30, 2011 Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number Number of Awards, Non-vested as of September 30, 2011 Number of Awards, Non-vested as of March 31, 2011 Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period Restricted stock granted Number of Awards, Awarded Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period Number of Awards, Released Number of Awards, Released Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period Number of Awards, Forfeited Number of Awards, Forfeited Number of Awards, Forfeited 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, Non-vested as of September 30, 2011 Weighted Average Grant Date Fair Value, Non-vested as of March 31, 2011 Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value Weighted Average Grant Date Fair Value, Awarded 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, Released Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period, Weighted Average Grant Date Fair Value Weighted Average Grant Date Fair Value, Forfeited Deferred Tax Assets, Valuation Allowance Valuation allowance against deferred tax assets Deferred Tax Assets, Valuation Allowance, Total 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 be realized through future reductions of tax-based income. Deferred Tax Valuation Allowance Research Tax Credit Valuation allowance reversed against research tax credits 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. Deferred Tax Valuation Allowance Comprised Research Tax Credit Comprised valuation allowance Valuation allowance against research tax credits The sum of the portions of deferred tax assets related to foreign net operating losses 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. Deferred Tax Valuation Allowance Foreign Net Operating Loss Valuation allowance against foreign net operating loss Effective Income Tax Rate, Continuing Operations Effective Income Tax Rate, Continuing Operations, Total Effective tax rate Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate Federal statutory tax rate Unrecognized Tax Benefits, Reductions Resulting from Lapse of Applicable Statute of Limitations Reductions related to the expiration of statutes of limitations Reductions related to the expiration of statutes of limitations Previously unrecognized tax benefits Significant Change in Unrecognized Tax Benefits is Reasonably Possible, Amount of Unrecorded Benefit Reasonably possible amount of currently remaining unrecognized tax benefits Unrecognized Tax Benefits Unrecognized Tax Benefits Balance at September 30, 2011 Balance at March 31, 2011 Unrecognized tax benefits, If recognized would favorably affect the effective tax Unrecognized Tax Benefits The amount of accrued interest and penalties which it is reasonably possible that the total amount thereof will significantly increase or decrease within 12 months of the balance sheet date. Unrecognized Tax Benefits Income Tax Penalties And Interest Accrued Resulting from Lapse of Applicable Statute of Limitations Reasonably possible amount of currently remaining accrued interest and penalties Accrued interest and penalties Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued, Total Accrued interest and penalties Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense, Total Interest and penalties Unrecognized Tax Benefits, Increases Resulting from Current Period Tax Positions Additions for tax positions related to fiscal 2012 Unrecognized Tax Benefits, Increases Resulting from Prior Period Tax Positions Additions for tax positions related to prior years Unrecognized Tax Benefits, Increases Resulting from Settlements with Taxing Authorities Settlements Unrecognized tax benefit increases resulting from foreign currency translation adjustment. Unrecognized Tax Benefits Reductions Resulting From Foreign Currency Translation Adjustment Foreign currency translation adjustment Foreign currency translation adjustment Income Tax Examination [Table] Income Tax Examination by Jurisdiction [Axis] Income Tax Authority [Domain] U.S. Federal [Member] U.S. Federal [Member] New Jersey. New Jersey Member New Jersey [Member] New Jersey [Member] Foreign Jurisdictions [Member] Foreign Jurisdictions [Member] Open Tax Years by Major Tax Jurisdiction Years Subject to Income Tax Examination Tax Years Subject to Income Tax Examination Amount that can no longer be borrowed under the amended and restated credit facility. Termination Amended And Restated Credit Facility Amended and restated credit facility Equity Component [Domain] Parent [Member] Legal Entity [Axis] Entity [Domain] Dell [Member] Dell Member Dell [Member] Arrow [Member] Arrow Member Arrow [Member]