Document And Entity Information Document and Entity Information Statement [Tables] Statement [Table] Statement [Line Items] Document Type Amendment Flag Document Period End Date Document Fiscal Year Focus Document Fiscal Period Focus Entity Registrant Name Entity Central Index Key Current Fiscal Year End Date Entity Filer Category Entity Common Stock Entity Common Stock, Shares Outstanding Entity Well-known Seasoned Issuer Entity Current Reporting Status Entity Voluntary Filers Entity Public Float Consolidated Balance Sheets ASSETS - balance sheet ASSETS Cash and cash equivalents- Cash and cash equivalents at end of year Cash and cash equivalents at beginning of year Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value, Total Marketable securities-current Marketable securities Marketable Securities, Current, Total Short-term marketable securities Accounts receivable, net Accounts receivable, net Inventory - net Inventory Inventory, Net, Total The total of the amounts paid in advance for capitalized costs that will be expensed with the passage of time or the occurrence of a triggering event, and will be charged against earnings within one year or the normal operating cycle, if longer, and the aggregate carrying amount of current assets, as of the balance sheet date, not separately presented elsewhere in the balance sheet. Current assets are expected to be realized or consumed within one year (or the normal operating cycle, if longer). Prepaid Expense And Other Assets Current Prepaid expenses and other current assets Restricted cash. Restricted cash Deferred Tax Assets Gross Deferred Tax Assets, Net, Current, Ending Balance Deferred Tax Assets, Net, Current, Beginning Balance Deferred tax assets Deferred tax assets, net Total current assets Total current assets 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 Goodwill Goodwill activity, ending balance Goodwill activity, beginning balance Carrying amount of goodwill Intangibles, net Intangible Assets, Net (Excluding Goodwill), Total Marketable securities Marketable Securities, Noncurrent, Total Long-term marketable securities Deferred tax assets Deferred Tax Assets, Gross, Total Other assets Other assets Assets Total assets Total assets LIABILITIES AND STOCKHOLDERS EQUITY LIABILITIES AND STOCKHOLDERS' EQUITY Accounts Payable And Accrued Liabilities Current Accounts Payable and Accrued Liabilities, Current, Total Accounts payable and accrued expenses Adverse purchase commitments. Adverse Purchase Commitments Adverse purchase commitments Deferred rev. Deferred revenue Deferred revenue Deferred Tax Liabilities, Current Deferred tax liabilities Total current liabilities Total current liabilities Deferred revenue, noncurrent Deferred revenue Deferred Revenue, Noncurrent, Total Deferred tax liabilities Other Other liabilities Other Liabilities Total liabilities Commitments and contingencies (Note 12) Stockholders' equity: Common stock Common Stock, Value, Issued, Ending Balance Common Stock, Value, Issued, Beginning Balance Common stock, $0.01 par value, 100,000,000 shares authorized, 50,719,827 and 44,845,541 shares issued and outstanding at March 31, 2011 and 2010, respectively Common Stock, Value, Issued, Total Additional paid-in capital Additional Paid in Capital, Ending Balance Additional Paid in Capital, Beginning Balance Additional Paid in Capital, Total Accumulated other comprehensive loss Accumulated Other Comprehensive Income (Loss), Net of Tax, Ending Balance Accumulated Other Comprehensive Income (Loss), Net of Tax, Beginning Balance Accumulated other comprehensive income (loss) Accumulated Other Comprehensive Income (Loss), Net of Tax, Total Retained Earnings Accumulated Deficit Retained Earnings (Accumulated Deficit), Ending Balance Retained Earnings (Accumulated Deficit), Beginning Balance Accumulated deficit Accumulated deficit Total stockholders' equity Balance Balance Total stockholders' equity Liabilities and Stockholders' Equity Total liabilities and stockholders' equity 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 Common Stock, Shares, Issued, Total Common Stock, Shares, Outstanding Balance, Shares Balance, Shares Common stock, shares outstanding Consolidated Statements of Operations Revenue Revenues Revenues Cost and operating expenses: Cost of revenues Cost of Revenue, Total Research and development Research and Development Expense, Total Selling, general and administrative Selling, General and Administrative Expense, Total Goodwill and long-lived asset impairment. Goodwill and Long-Lived Asset Impairment Goodwill and long-lived asset impairment Amortization of acquisition related intangibles Amortization of Intangible Assets, Total Restructuring and impairments-income statement Restructuring Restructuring and impairments Total cost and operating expenses Total cost and operating expenses Total operating expenses Operating income Operating income Operating (loss) income Interest income Interest income, net Other income (expense), net Other income (expense), net Income (loss) before income tax expense (Loss) income before income tax expense Income tax expense Income tax expense Income tax expense Net income Net (loss) income Net (loss) income Net (loss) income per common share Basic Net income per share - basic Basic EPS - Diluted Diluted Diluted Net income per share - diluted Weighted average number of common shares outstanding Basic - shares outstanding Basic Shares used in per-share calculation - basic Shares used in per-share calculation - basic Diluted Diluted Shares used in per-share calculation - diluted Consolidated Statements of Cash Flows Cash flows from operating activities: Adjustments to reconcile net income to net cash (used in) provided by operations: Adjustments to reconcile net income to net cash (used in) provided by operations: Depreciation and amortization Depreciation, Depletion and Amortization, Total Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition, Value Stock-based compensation expense The aggregate amount of noncash, equity-based non-employee remuneration. This may include the value of stock options, amortization of restricted stock, and adjustment for non-employee compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method. Share based compensation non-employee Stock-based compensation expense-non-employee Non-employee stock-based compensation expense Goodwill, Impairment Loss Impairment of goodwill Impairment of long-lived and intangible assets, Impairment of Long-Lived and Intangible Assets Impairment of long-lived and intangible assets InventoryWriteDown Provision for excess and obsolete inventory Losses on purchase commitments. Losses on Purchase Commitments Losses on purchase commitments Allowance for doubtful accounts Write-off of prepaid value added taxes. Write-Off of Prepaid Value Added Taxes Write-off of prepaid value added taxes Re-valuation of warrant Deferred income taxes Deferred Income Tax Expense (Benefit), Total Other non-cash items Changes in operating asset and liability accounts: Increase Decrease In Accounts Receivable Accounts receivable Accounts receivable Increase Decrease In Inventories Inventory Inventory Increase (Decrease) in Inventories, Total Increase (Decrease) in Prepaid expenses and other current assets Prepaid expenses and other current assets Prepaid expenses and other current assets Increase (Decrease) in Prepaid, Deferred Expense and Other Assets, Total Accounts payable and accrued expenses-changes Accounts payable and accrued expenses Increase (Decrease) in Accounts Payable and Accrued Liabilities, Total Deferred revenue Deferred revenue Net cash used in operating activities Net cash (used in) provided by operating activities Cash flows from investing activities: Purchase of property, plant and equipment Purchase of property, plant and equipment Payments to Acquire Property, Plant, and Equipment, Total Purchase of marketable securities Purchase of marketable securities Payments to Acquire Marketable Securities, Total Proceeds from the maturity of marketable securities Proceeds from Sale and Maturity of Marketable Securities, Total Change in restricted cash Change in restricted cash Increase (Decrease) in Restricted Cash, Total Purchase of intangible assets Purchase of intangible assets Payments to Acquire Additional Interest in Subsidiaries Purchase of minority investments Purchase of minority investment Change in other assets Change in other assets Change in other assets Change in other assets Net cash used in investing activities Net cash used in investing activities Cash flows from financing activities: Proceeds from follow-on public offering, net of issuance costs Proceeds from public equity offering, net Proceeds from follow-on public offering, net of costs Proceeds from exercise of employee stock options and ESPP Proceeds from exercise of employee stock options Net Cash Provided by (Used in) Financing Activities Net cash provided by financing activities Effect of exchange rate changes on cash and cash equivalents Effect of exchange rate changes on cash and cash equivalents Net decrease in cash and cash equivalents Net increase in cash and cash equivalents Supplemental Cash Flow Information [Abstract] Supplemental schedule of cash flow information: Income Taxes Paid Cash paid for income taxes Non-cash contingent consideration in connection with acquisitions Non-Cash Contingent Consideration In Connection With Acquisitions Non-cash contingent consideration in connection with acquisitions Non-cash issuance of common stock Non Cash Issuance Of Common Stock Non-cash issuance of common stock Consolidated Statements of Stockholders' Equity Statement, Equity Components [Axis] Equity Component [Domain] Parent [Member] Common Stock [Member] Additional Paid-In Capital [Member] Deferred Contract Costs Warrant [Member] Deferred Contract Costs-Warrant [Member] Accumulated Other Comprehensive Income (Loss) [Member] Accumulated Deficit [Member] Stock Issued During Period, Value, Stock Options Exercised Exercise of stock options Stock Issued During Period, Shares, Stock Options Exercised Exercise of stock options, Shares Exercise Of warrants Exercise Of warrants Exercise of warrants Exercise Of Warrants Shares Exercise of warrants, Shares Exercise of warrants, Shares Stock Issued During Period, Value, Employee Stock Purchase Plan Issuance of common stock - ESPP Stock Issued During Period, Shares, Employee Stock Purchase Plans Issuance of common stock - ESPP, Shares Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures Issuance of common stock - restricted shares Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures, Total Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures Issuance of common stock - restricted shares, Shares Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures, Total Stock Issued During Period, Value, New Issues Issuance of stock for calendar 401(k) match Stock Issued During Period, Shares, New Issues Issuance of stock for calendar 401(k) match, Shares Issuance Of Common Stock Public Offering Net Of Costs Issuance Of Common Stock Public Offering Net Of Costs Issuance of common stock - follow-on public offering, net of costs Issuance Of Common Stock Public Offering Net Of Costs shares Issuance Of Common Stock Public Offering Net Of Costs shares Issuance of common stock- public offering, net of costs, Shares Contingent Consideration Contingent Consideration Contingent consideration Contingent Consideration Shares Contingent Consideration Shares Contingent consideration, Shares Noncontrolling Interest, Increase from Stock Issuance or Sale of Parent Equity Interest Minority interest investment Minority Interest Investment Shares Minority Interest Investment Shares Minority interest investment, Shares Amortization Of Deferred Warrant Costs Amortization Of Deferred Warrant Costs Amortization of deferred warrant costs Other Comprehensive Income, Unrealized Holding Gain (Loss) on Securities Arising During Period, Net of Tax Net unrealized losses on investments Unrealized losses on investments Unrealized (losses) gains on cash flow hedges Unrealized gains on cash flow hedges Other Comprehensive Income, Derivatives Qualifying as Hedges, Net of Tax, Total Unrealized gains on cash flow hedges Other Comprehensive Income, Foreign Currency Transaction and Translation Adjustment, Net of Tax Cumulative translation adjustment Other Comprehensive Income, Foreign Currency Transaction and Translation Adjustment, Net of Tax, Total Foreign currency translation gains (losses) Consolidated Statements of Comprehensive Loss Other comprehensive (loss) income, net of tax: Other comprehensive income (loss), net of tax: Other Comprehensive Income, Reclassification Adjustment on Derivatives Included in Net Income, Net of Tax Reclassification of ineffective hedge gains to net income Other Comprehensive Income (Loss), Net of Tax Total other comprehensive income (loss), net of tax Comprehensive Income, Net of Tax, Including Portion Attributable to Noncontrolling Interest Comprehensive income (loss) Nature Of The Business And Operations [Abstract] Nature of the Business and Operations Nature of Operations [Text Block] Nature of the Business and Operations Summary of Significant Accounting Policies Significant Accounting Policies [Text Block] Summary of Significant Accounting Policies Marketable Securities and Fair Value Disclosures [Abstract] Marketable Securities and Fair Value Disclosures Marketable Securities And Fair Value Disclosures [Text Block] Marketable Securities And Fair Value Disclosures [Text Block] Marketable Securities and Fair Value Disclosures Derivative Financial Instruments Derivative Instruments And Hedging Activities Disclosure Text Block Derivative Financial Instruments Accounts Receivable Accounts Receivable Text Block Accounts Receivable Inventory Inventory Disclosure Text Block Inventory Property, Plant and Equipment Property, Plant and Equipment Disclosure [Text Block] Property, Plant and Equipment Goodwill And Intangible Assets Disclosure [Abstract] Goodwill and Other Intangible Assets Goodwill and Intangible Assets Disclosure [Text Block] Goodwill and Other Intangible Assets Accounts Payable and Accrued Expenses Accounts Payable and Accrued Liabilities Disclosure [Text Block] Accounts Payable and Accrued Expenses Income Taxes Income Taxes Income Tax Disclosure Text Block Income Taxes Stockholders' Equity Stockholders' Equity Note Disclosure [Text Block] Stockholders' Equity Commitments and Contingencies Commitments and Contingencies Commitments And Contingencies Disclosure Text Block Commitments and Contingencies Employee Benefit Plans Pension and Other Postretirement Benefits Disclosure [Text Block] Employee Benefit Plans Equity Method Investments Equity Method Investments [TextBlock] Equity Method Investments Equity Method Investments Text Block Restructuring Restructuring and Impairments Restructuring Business Segment And Geographic Information [Abstract] Business Segment and Geographic Information Segment Reporting Disclosure Text Block Business Segment Information Business Segment and Geographic Information Quarterly Financial Data (Unaudited) Quarterly Financial Information [Text Block] Quarterly Financial Data (Unaudited) Subsequent Events [Abstract] Subsequent Events Schedule Of Subsequent Events Text Block Subsequent Events Recent Accounting Pronouncements Schedule of New Accounting Pronouncements and Changes in Accounting Principles [Text Block] Recent Accounting Pronouncements Valuation and Qualifying Accounts [Abstract] Schedule II - Valuation and Qualifying Accounts Schedule of Valuation and Qualifying Accounts Disclosure [Text Block] Schedule II - Valuation and Qualifying Accounts