Deferred Revenues [Abstract] 6. Deferred Revenues [Abstract] Deferred Revenue Disclosure [Text Block] Deferred Revenue Disclosure [Text Block] Summary of Significant Accounting Policies [Abstract] 1. Summary of Significant Accounting Policies [Abstract] Significant Accounting Policies [Text Block] Commitments and Contingencies [Abstract] 7. Commitments and Contingencies [Abstract] Commitments and Contingencies Disclosure [Text Block] Commitments and Contingencies Disclosure [Text Block] Segment Information [Abstract] 13. Segment Information [Abstract] Segment Reporting Disclosure [Text Block] Segment Reporting Disclosure [Text Block] Property And Equipment Net [Abstract] Property And Equipment Net Property, Plant and Equipment Disclosure [Text Block] Property, Plant and Equipment Disclosure [Text Block] Employee Benefit Plan [Abstract] 11. Employee Benefit Plan [Abstract] Compensation and Employee Benefit Plans [Text Block] Compensation and Employee Benefit Plans [Text Block] Investments and Fair Value Measurements [Abstract] Investments and Fair Value Measurements [Abstract] Fair Value, Measurement Inputs, Disclosure [Text Block] Fair Value Disclosures [Text Block] Condensed Consolidated Statements of Operations [Abstract] Condensed Consolidated Statements of Operations [Abstract] Statement [Table] Statement [Table] Statement, Scenario [Axis] Statement, Scenario [Axis] Scenario, Unspecified [Domain] Scenario, Unspecified [Domain] Statement [Line Items] Statement [Line Items] REVENUE: Revenue, Net [Abstract] Product Sales Revenue, Goods, Net Services Sales Revenue, Services, Net Ratable product and services Ratable product and services revenue, Net Aggregate revenue during the period from ratable product and services rendered in the normal course of business, after deducting returns, allowances and discounts. Total revenue Revenue, Net COST OF REVENUE: Cost of Goods and Services Sold [Abstract] Product Cost of Goods Sold Services Cost of Services Ratable product and services Cost of Ratable product and services Total costs related to ratable products and services rendered by an entity during the reporting period Total cost of revenue Cost of Goods and Services Sold GROSS PROFIT: Gross Profit [Abstract] Product Product Gross Profit Products Gross profit is the aggregate revenue less cost of goods sold directly attributable to the revenue generation activity. Services Services Gross Profit Service Gross Profit is the aggregate revenue less cost of services sold or operating expenses directly attributable to the revenue generation activity. Ratable product and services Ratable product and services Gross Profit Gross Profit is the aggregated revenue less the cost of ratable goods and services sold or operating expenses directly attributable to the revenue generation activity. Total gross profit Gross Profit OPERATING EXPENSES: Operating Expenses [Abstract] Research and development Research and Development Expense Sales and marketing Selling and Marketing Expense General and administrative General and Administrative Expense Total operating expenses Operating Expenses OPERATING INCOME Operating Income (Loss) INTEREST INCOME Investment Income, Net OTHER INCOME (EXPENSE)—Net Nonoperating Income (Expense) INCOME BEFORE INCOME TAXES Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest PROVISION FOR INCOME TAXES Income Tax Expense (Benefit) Net Income Net Income (Loss) Attributable to Parent Net income per share: Earnings Per Share [Abstract] Basic Earnings Per Share, Basic Diluted Earnings Per Share, Diluted Weighted-average shares outstanding: Weighted Average Number of Shares Outstanding, Diluted [Abstract] Basic Weighted Average Number of Shares Outstanding, Basic Diluted Weighted Average Number of Shares Outstanding, Diluted Acquisitions [Abstract] Acquisitions [Abstract] Mergers, Acquisitions and Dispositions Disclosures [Text Block] Business Combination Disclosure [Text Block] Stockholders' Equity Attributable to Parent [Abstract] Stockholders' Equity Note Disclosure [Text Block] Stockholders' Equity Note Disclosure [Text Block] Condensed Consolidated Balance Sheets [Abstract] Condensed Consolidated Balance Sheets [Abstract] Class of Stock [Axis] Class of Stock [Axis] Class of Stock [Domain] Class of Stock [Domain] 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 Accounts receivable, net of allowance for doubtful accounts of $180 and $303 at June 30, 2011 and December 31, 2010, respectively Accounts Receivable, Net, Current Inventory—Net Inventory, Net Deferred tax asset Deferred Tax Assets, Net, Current Prepaid expenses and other current assets Prepaid Expense and Other Assets Deferred cost of revenues Deferred Costs, Current Total current assets Assets, Current PROPERTY AND EQUIPMENT—Net Property, Plant and Equipment, Net DEFERRED TAX ASSET—Non-current Deferred Tax Assets, Net, Noncurrent DEFERRED COST OF REVENUES Deferred Costs, Noncurrent LONG-TERM INVESTMENTS Long-term 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 Accrued payroll and compensation Employee-related Liabilities, Current Deferred revenue Deferred Revenue, Current Total current liabilities Liabilities, Current DEFERRED REVENUE—Non-current Deferred Revenue, Noncurrent OTHER NON-CURRENT LIABILITIES Other Liabilities, Noncurrent Total liabilities Liabilities COMMITMENTS AND CONTINGENCIES (Note 7) Commitments and Contingencies STOCKHOLDERS' EQUITY: Common stock, $0.0005 par value - 600,000 shares authorized; 154,322 and 150,172 shares issued and 152,913 and 148,763 shares outstanding at June 30, 2011 and December 31, 2010, respectively Common Stock, Value, Issued Additional paid-in-capital Additional Paid in Capital, Common Stock Treasury stock Treasury Stock, Value Accumulated other comprehensive income Accumulated Other Comprehensive Income (Loss), Net of Tax Retained earnings (accumulated deficit) Retained Earnings (Accumulated Deficit) Total stockholders' equity Stockholders' Equity Attributable to Parent TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY Liabilities and Equity Income Taxes [Abstract] Income Taxes [Abstract] Income Tax Disclosure [Text Block] Income Tax Disclosure [Text Block] Income (Loss) Per Share [Abstract] 5. Income (Loss) Per Share [Abstract] Earnings Per Share [Text Block] Earnings Per Share [Text Block] Inventory [Abstract] Inventory [Abstract] Inventory Disclosure [Text Block] Inventory Disclosure [Text Block] Condensed Consolidated Statements of Cash Flows [Abstract] Condensed Consolidated Statements of Cash Flows [Abstract] CASH FLOWS FROM OPERATING ACTIVITIES: Net Cash Provided by (Used in) Operating Activities [Abstract] Net Income 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 Amortization of investment premiums Accretion (Amortization) of Discounts and Premiums, Investments Stock-based compensation Share-based Compensation Excess tax benefit from employee stock option plans Excess Tax Benefit from Share-based Compensation, Operating Activities Changes in operating assets and liabilities: Increase (Decrease) in Other Operating Assets and Liabilities, Net [Abstract] Accounts receivable—net Increase (Decrease) in Accounts Receivable Inventory—net Increase (Decrease) in Inventories Deferred tax assets Increase (Decrease) in Deferred Income Taxes Prepaid expenses and other current assets Increase (Decrease) in Prepaid Expense and Other Assets Deferred cost of revenues Increase (Decrease) in Deferred Charges Other assets Increase (Decrease) in Other Operating Assets Accounts payable Increase (Decrease) in Accounts Payable Accrued liabilities Increase (Decrease) in Accrued Liabilities Accrued payroll and compensation Increase (Decrease) in Employee Related Liabilities Deferred settlement and other liabilities Increase (Decrease) in Other Operating Liabilities Deferred revenue Increase (Decrease) in Deferred Revenue Income taxes payable Increase (Decrease) in Income Taxes Payable 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 investments Payments to Acquire Investments Maturities and sales of investments Proceeds from Sale of Available-for-sale Securities Purchases of property and equipment Payments to Acquire Productive Assets Payment made in connection with business acquisition, net Payments to Acquire Businesses, Net of Cash Acquired 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] Proceeds from exercise of stock options Proceeds from Stock Options Exercised Offering costs paid in connection with Initial Public Offering Payments of Stock Issuance Costs Excess tax benefit from employee stock option plans Excess Tax Benefit from Share-based Compensation, Financing Activities Net cash provided by financing activities Net Cash Provided by (Used in) Financing Activities EFFECT OF EXCHANGE RATES ON CASH AND CASH EQUIVALENTS 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—Beginning of period CASH AND CASH EQUIVALENTS—End of period SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION: Supplemental Cash Flow Information [Abstract] Cash paid (refunded) for income taxes Income Taxes Paid, Net NON-CASH INVESTING AND FINANCING ACTIVITIES: Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract] Purchase of property and equipment not yet paid Capital Expenditures Incurred but Not yet Paid DEI [Abstract] DEI [Abstract] Document Information [Table] Document Information [Table] Document Information, Document [Axis] Document [Domain] Document Information [Line Items] Document Information [Line Items] Entity Registrant Name Entity Registrant Name Entity Central Index Key Entity Central Index Key Document Type Document Type Document Period End Date Document Period End Date Amendment Flag Amendment Flag Document Fiscal Year Focus Document Fiscal Year Focus Document Fiscal Period Focus Document Fiscal Period Focus Current Fiscal Year End Date Current Fiscal Year End Date Entity Current Reporting Status Entity Current Reporting Status Entity Filer Category Entity Filer Category Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Balance Sheet Parentheticals [Abstract] Balance Sheet Parentheticals [Abstract] Allowance for doubtful accounts Allowance for Doubtful Accounts Receivable, Current Common Stock, par value Common Stock, Par or Stated Value Per Share Common Stock, shares authorized Common Stock, Shares Authorized Common Stock, shares issued Common Stock, Shares, Issued Common Stock, shares outstanding Common Stock, Shares, Outstanding