Document and Entity Information [Abstract] Document and Entity Information [Abstract] Entity Registrant Name Entity Registrant Name Entity Central Index Key Entity Central Index Key Trading Symbol Trading Symbol Entity Current Reporting Status Entity Current Reporting Status Entity Voluntary Filers Entity Voluntary Filers Current Fiscal Year End Date Current Fiscal Year End Date Entity Filer Category Entity Filer Category Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding 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 Statement Of Financial Position [Abstract] Statement of Financial Position [Abstract] Assets [Abstract] ASSETS Assets, Current [Abstract] Current assets: Cash and Cash Equivalents, At Carrying Value Cash and cash equivalents Cash and cash equivalents, which primarily include money market funds Cash and cash equivalents Cash and cash equivalents, beginning of period Cash and cash equivalents, end of period Accounts Receivable, Net, Current Accounts receivable, net Accounts receivable, net Inventory, Net Inventories Total Prepaid Expense and Other Assets, Current Prepaid expenses and other current assets Prepaid expenses and other current assets Assets, Current Total current assets Total current assets Property, Plant and Equipment, Net Property and equipment, net Property and equipment, net Property, Plant and Equipment, Net, Beginning Balance Property, Plant and Equipment, Net, Ending Balance Available-For-Sale Securities, Debt Securities, Noncurrent Investments Available-for-sale securities fair value Other Assets, Noncurrent Other assets, net Other Assets, Noncurrent, Total Assets Total assets Total assets Liabilities and Equity [Abstract] LIABILITIES AND STOCKHOLDERS' EQUITY Liabilities, Current [Abstract] Current liabilities: Accounts Payable, Current Accounts payable Accounts Payable, Current, Total Accrued Liabilities, Current Accrued expenses Accrued Liabilities, Current, Total Employee-Related Liabilities, Current Accrued compensation Employee-related Liabilities, Current, Total Accrued Professional Fees, Current Accrued professional Accrued Income Taxes, Current Income tax liability Accrued income taxes Deferred Revenue, Current Deferred revenue Deferred Revenue, Current, Total Liabilities, Current Total current liabilities Total current liabilities Deferred Revenue, Noncurrent Long-term deferred revenue Deferred Revenue, Noncurrent, Total Stockholders Equity Attributable To Parent [Abstract] Stockholders' equity: Preferred Stock, Value, Outstanding Preferred stock, $1.00 par value; 1,000,000 shares authorized, none outstanding Common Stock, Value, Outstanding Common stock, $.01 par value; 70,000,000 shares authorized; issued and outstanding 22,260,377 as of June 30, 2012 and 20,622,889 as of December 31, 2011 Additional Paid In Capital, Common Stock Additional paid-in capital Additional Paid in Capital, Common Stock, Beginning Balance Additional Paid in Capital, Common Stock, Ending Balance Accumulated Other Comprehensive Income (Loss), Net Of Tax Accumulated other comprehensive loss Retained Earnings (Accumulated Deficit) Retained earnings (accumulated deficit) Accumulated deficit Retained Earnings (Accumulated Deficit), Beginning Balance Retained Earnings (Accumulated Deficit), Ending Balance Stockholders' Equity Attributable To Parent Total stockholders' equity Total stockholders' equity Balance Balance Liabilities and Equity Total liabilities and stockholders' equity Total liabilities and stockholders' equity Preferred Stock, Par Or Stated Value Per Share Preferred stock, par value (in dollars per share) Preferred Stock, Shares Authorized Preferred stock, shares authorized Preferred Stock, Shares Outstanding Preferred stock, shares outstanding Common Stock, Par Or Stated Value Per Share Common stock, par value (in dollars per share) 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 Common stock, shares outstanding Balance (in shares) Balance (in shares) Statement Of Income and Comprehensive Income [Abstract] Statement of Income and Comprehensive Income [Abstract] Revenue, Net [Abstract] Revenue: Sales Revenue, Goods, Net Product sales Product sales Sales Revenue, Services, Net Services Services Royalty Revenue Royalties Royalties Revenue, Net Revenue Revenue Total revenue Costs and Expenses [Abstract] Costs and expenses: Cost Of Goods Sold Cost of product sales Cost of product sales Cost Of Services Cost of services Cost of services Research and Development Expense Research and development Research and development Selling and Marketing Expense Selling and marketing Selling and marketing General and Administrative Expense General and administrative General and administrative Costs and Expenses Total costs and expenses Total costs and expenses Operating Income (Loss) Income (loss) from operations Income (loss) from operations Gain On Sale Of Patent Assets Net Of Transaction Costs Gain on sale of patent assets Represent Amount of sale of patent assets after reduced transaction costs. Gain on sale of patent assets Other Nonoperating Income Other income Investment Income, Interest Interest income Income (Loss) From Continuing Operations Before Income Taxes, Extraordinary Items, Noncontrolling Interest Income (Loss) before provision for income taxes Income (loss) before provision for income taxes Provision For Income Taxes Income tax expense Provision for income taxes Provision for income taxes Provisions for income taxes Net Income (Loss) Attributable To Parent Net income Net income (Loss) Net income (loss) Comprehensive Income (Loss), Net Of Tax, Attributable To Parent [Abstract] Other comprehensive income, net of $0 tax: Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) On Securities Arising During Period, Net Of Tax Unrealized gains (loss) on available for sale securities Comprehensive Income (Loss), Net Of Tax, Attributable To Parent Comprehensive income Comprehensive income (loss) Earnings Per Share, Basic Net income (loss) per share - basic (in dollars per share) Net income (loss) per share - basic (in dollars per share) Earnings Per Share, Diluted Net income (loss) per share - diluted (in dollars per share) Net income (loss) per share - diluted (in dollars per share) Weighted Average Number Of Shares Outstanding, Basic Weighted average shares - basic (in shares) Weighted-average common shares outstanding (in shares) Weighted Average Number of Shares Outstanding, Basic, Total Weighted Average Number Of Shares Outstanding, Diluted Weighted average shares - diluted (in shares) Diluted shares outstanding (in shares) Diluted shares outstanding (in shares) Other Comprehensive Income (Loss), Tax, Portion Attributable To Parent Tax effect of other comprehensive income Statement Of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Net Cash Provided By (Used In) Operating Activities, Continuing Operations [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 and amortization Depreciation and amortization Share-Based Compensation Stock-based compensation Stock-based compensation Excess Tax Benefit (Tax Deficiency) From Share-Based Compensation, Operating Activities Excess tax benefits from stock-based compensation Excess tax benefits from stock-based compensation Accretion (Amortization) Of Discounts and Premiums, Investments Amortization of discount on investments Amortization of discount on investments Gain (Loss) On Sale Of Investments Gain on sale of investments Gain on sale of investments Provision For Doubtful Accounts Provision for doubtful accounts Increase (Decrease) In Operating Capital [Abstract] Changes in assets and liabilities: Increase (Decrease) In Accounts Receivable Accounts receivable Accounts receivable Increase (Decrease) In Inventories Inventories Inventories Inventories Increase (Decrease) In Prepaid Expense and Other Assets Prepaid expenses and other current assets Prepaid expenses and other current assets Prepaid expenses and other current assets Increase (Decrease) In Accounts Payable Accounts payable Accounts payable Increase (Decrease) In Accrued Liabilities Accrued expenses, compensation, and professional Increase (Decrease) In Income Taxes Payable Accrued income taxes Increase (Decrease) In Deferred Revenue Deferred revenue Net Cash Provided By (Used In) Operating Activities, Continuing Operations Net cash provided by (used in) operating activities Net cash provided by operating activities Net Cash Provided By (Used In) Investing Activities, Continuing Operations [Abstract] Cash flows from investing activities: Payments To Acquire Property, Plant, and Equipment Purchases of property and equipment Purchases of property and equipment Purchases of property and equipment Proceeds From Sale Of Available-For-Sale Securities, Debt Sales of investments Proceeds From Sale Of Intangible Assets Proceeds from sale of patent assets, net Net Cash Provided By (Used In) Investing Activities, Continuing Operations Net cash provided by (used in) investing activities Net cash provided by (used in) investing activities Net Cash Provided By (Used In) Financing Activities, Continuing Operations [Abstract] Cash flows from financing activities: Proceeds From Issuance Of Common Stock Proceeds from issuance of common stock Payments Of Ordinary Dividends, Common Stock Payment of dividends Payment of dividends Shares Surrendered By Employees To Pay Taxes Related To Unrestricted Stock Shares surrendered by employees to pay taxes related to unrestricted stock Cash outflow due to shares surrendered by employees to pay taxes related to unrestricted stock. Shares surrendered by employees to pay taxes related to unrestricted stock Net Cash Provided By (Used In) Financing Activities, Continuing Operations Net cash provided by (used in) financing activities Net cash provided by (used in) financing activities Cash and Cash Equivalents, Period Increase (Decrease) Increase (decrease) in cash and cash equivalents Increase in cash and cash equivalents Basis Of Accounting [Abstract] Basis Of Accounting [Abstract] Basis Of Accounting [Text Block] Basis of Presentation Fair Value Disclosures [Abstract] Fair Value Disclosures [Abstract] Fair Value Disclosures [Text Block] Fair Value Measurements Inventory Disclosure [Abstract] Inventory Disclosure [Abstract] Inventory Disclosure [Text Block] Inventories Earnings Per Share [Abstract] Earnings Per Share [Abstract] Earnings Per Share [Text Block] Computation of Earnings per Share Disclosure Of Compensation Related Costs, Share-Based Payments [Abstract] Disclosure of Compensation Related Costs, Share-based Payments [Abstract] Disclosure Of Compensation Related Costs, Share-Based Payments [Text Block] Stock-Based Compensation Segment Reporting [Abstract] Segment Reporting [Abstract] Segment Reporting Disclosure [Text Block] Business Segments Stockholders' Equity Note [Abstract] Stockholders' Equity Note [Abstract] Stockholders' Equity Note Disclosure [Text Block] Statement of Stockholders' Equity Accounting Changes and Error Corrections [Abstract] Accounting Changes and Error Corrections [Abstract] Accounting Changes and Error Corrections [Text Block] Recent Accounting Pronouncements Goodwill and Intangible Assets Disclosure [Abstract] Goodwill and Intangible Assets Disclosure [Abstract] Intangible Assets Disclosure [Text Block] Sale of Patent Assets Income Tax Disclosure [Abstract] Income Tax Disclosure [Abstract] Income Tax Disclosure [Text Block] Income Taxes Dividends Payable [Abstract] Dividends Payable [Abstract] Dividends Payable [Text Block] Dividends Represent The entire disclosure for dividends payble. Variable Interest Entity [Abstract] Variable Interest Entity [Abstract] Variable Interest Entity [Text Block] Variable Interest Entity The entire disclosure for Variable Interest Entity, Which entered into a patent arrangement with a third party. Costs Associated With Exit [Abstract] Costs Associated With Exit [Abstract] Costs Associated With Exit [Text Block] DSL Service Assurance Hardware Exit The entire disclosure for costs associated with exiting, disposing of certain operations. Schedule Of Inventory, Current [Table Text Block] Schedule of Inventories Schedule Of Earnings Per Share, Basic and Diluted [Table Text Block] Schedule of Net income per share Schedule Of Employee Service Share-Based Compensation, Allocation Of Recognized Period Costs [Table Text Block] Schedule of stock-based employee compensation expenses included in our unaudited consolidated statements of comprehensive income Schedule Of Segment Reporting Information, By Segment [Table Text Block] Schedule of Results of operations for our reportable segments Schedule Of Revenue From External Customers Attributed To Foreign Countries By Geographic Area [Table Text Block] Schedule of Revenues were generated from the following geographic regions Stockholders' Equity Note [Text Block] Schedule of statement of changes in Stockholders' Equity Tabular disclosure of an Stockholders' Equity. Schedule Of Restructuring and Related Costs [Table Text Block] Schedule of Exit cost activities Fair Value, Assets and Liabilities Measured On Recurring and Nonrecurring Basis [Table] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Table] Fair Value, Hierarchy [Axis] Fair Value, Hierarchy [Axis] Fair Value, Measurements, Fair Value Hierarchy [Domain] Fair Value, Measurements, Fair Value Hierarchy [Domain] Fair Value, Inputs, Level 1 [Member] Fair Value, Inputs, Level 1 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] Inventory, Raw Materials, Net Of Reserves Raw materials Inventory, Finished Goods, Net Of Reserves Finished goods Incremental Common Shares Attributable To Share-Based Payment Arrangements Additional dilutive common stock equivalents Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount One Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would loss per share or unit amounts for the period presented. Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount One (in shares) Antidilutive Securities Excluded From Computation Of Earnings Per Share, Amount Anti-dilutive common stock Share purchase (in shares) 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 [Axis] 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] Employee Service Share-based Compensation, Allocation of Recognized Period Costs, Report Line [Domain] Cost Of Sales [Member] Cost of product sales Cost Of Services [Member] Cost of services Primary financial statement caption in which reported facts about cost of services have been included. Research and Development Expense [Member] Research and Development Expense Selling and Marketing Expense [Member] Selling and Marketing Expense General and Administrative Expense [Member] General and Administrative Expense Employee Service Share-Based Compensation, Allocation Of Recognized Period Costs [Line Items] Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] Allocated Share-Based Compensation Expense Stock-based compensation expense Stock-based compensation charge 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] Award Type [Domain] Stock Options and Stock Appreciation Rights [Member] Stock Options and Stock Appreciation Rights Stock Options And Stock Appreciation Rights. Unrestricted Stock Grants [Member] Unrestricted Stock Grants Represent Unrestricted Stock Grants. Share-Based Compensation Arrangement By Share-Based Payment Award [Line Items] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-Based Compensation Arrangement By Share-Based Payment Award, Options, Grants In Period, Net Of Forfeitures, Total Granted Stock options (in shares) Issuance of unrestricted stock (in shares) Number Of Shares Issued For Unrestricted Stock Grants Unrestricted Stock Grants to directors, officers and employees (issued immediately) (in shares) The Number Of Shares Issued For Unrestricted Stock Grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). Number Of Shares To Be Issued For Unrestricted Stock Grants Over Specified Equal Installments Unrestricted Stock Grants to directors, officers and employees (issued in four equal increments) (in shares) Unrestricted Stock Grants to directors, officers and employees (issued in four equal increments) (in shares) The Number Of Shares To Be Issued For Unrestricted Stock Grants Over Specified Equal Installments. Share-Based Compensation Arrangement By Share-Based Payment Award, Equity Instruments Other Than Options, Grants In Period Unrestricted Stock Grants to directors, officers and employees (in shares) Unrestricted Stock Grants to directors, officers and employees (in shares) Share-Based Compensation Arrangement By Share-Based Payment Award, Shares Issued In Period Shares issued to officers and employees (in shares) Shares Paid For Tax Withholding For Share Based Compensation Grantees surrendered shares of common stock (in shares) Share Based Compensation Arrangement By Share Based Payment Award Shares Issued In Period Net Of Shares Withheld For Taxes Net of common stock shares were issued (in shares) Number of share instruments newly issued under a share-based compensation plan net of Grantees surrendered shares of common stock. Adjustments Related To Tax Withholding For Share-Based Compensation Company paid withholding taxes Statement [Table] Statement [Table] Business Segments [Axis] Business Segments [Axis] Segment [Domain] Segment [Domain] Biometrics and Imaging [Member] Biometrics & Imaging Component of an entity that usually provides financial and operational oversight and administrative support for biometrics and imaging. Dsl Service [Member] DSL Service Assurance Component of an entity that usually provides financial and operational oversight and administrative support for DSL service member. Corporate [Member] Corporate Statement [Line Items] Statement [Line Items] Geographical [Axis] Geographical [Axis] Segment, Geographical [Domain] Segment, Geographical [Domain] United States United States Rest Of World [Member] Rest of World Number Of Foreign Countries Accounting For More Than Specified Percentage Of Total Revenue Number of foreign countries accounting for 10% or more of total revenues Represent number Of Foreign Countries Accounting For More Than Specified Percentage Of Total Revenue. Equity Components [Axis] Equity Components [Axis] Equity Component [Domain] Equity Component [Domain] Common Stock [Member] Common Stock Additional Paid-In Capital [Member] Additional Paid-In Capital Accumulated Other Comprehensive Income (Loss) [Member] Accumulated other comprehensive loss Retained Earnings [Member] Retained Earnings/(Accumulated Deficit) Increase (Decrease) In Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Stock Issued During Period, Value, Stock Options Exercised Exercise of common stock options Share-Based Compensation Arrangement By Share-Based Payment Award, Options, Exercises In Period Exercise of common stock options (in shares) Stock Granted During Period, Value, Share-Based Compensation, Net Of Forfeitures, Total Issuance of unrestricted stock Shares Surrendered To Pay Taxes Related To Unrestricted Stock Value Shares surrendered by employees to pay taxes related to unrestricted stock Value of shares surrendered by employees to pay taxes related to unrestricted stock. Shares Surrendered To Pay Taxes Related To Unrestricted Stock Shares Shares surrendered by employees to pay taxes related to unrestricted stock (in shares) Number of shares surrendered by employees to pay taxes related to unrestricted stock. Stock Issued During Period, Value, Employee Stock Purchase Plan Issuance of common stock under employee stock purchase plan Stock Issued During Period, Shares, Employee Stock Purchase Plans Issuance of common stock under employee stock purchase plan (in shares) Adjustments To Additional Paid In Capital, Share-Based Compensation, Requisite Service Period Recognition, Total Stock-based compensation expense Adjustments To Additional Paid In Capital, Income Tax Benefit From Share-Based Compensation Tax benefits from such stock-based awards Tax benefits from stock-based awards Dividends, Common Stock Dividend payment Dividend payment Accumulated Other Comprehensive Loss Accumulated other comprehensive loss Total of accumulated other comprehensive loss related to change in equity from transactions and other events and circumstances from non-owner sources. Schedule Of Finite-Lived Intangible Assets [Table] Schedule of Finite-Lived Intangible Assets [Table] Finite-Lived Intangible Assets By Major Class [Axis] Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets, Major Class Name [Domain] Finite-Lived Intangible Assets, Major Class Name [Domain] Patented Technology [Member] Patented Technology Finite-Lived Intangible Assets [Line Items] Finite-Lived Intangible Assets [Line Items] Sale Of Patent Assets Sale of Patent Assets Represent Cash Inflow from sell the portion of our patent portfolio pertaining to technology. Sale Of Patent Assets Transaction Costs Transaction costs Represent transaction costs, which consisted primarily of fees from the law firm that assisted in the sale. Income Tax Contingency [Table] Income Tax Contingency [Table] Income Tax Authority [Axis] Income Tax Authority [Axis] Income Tax Authority [Domain] Income Tax Authority [Domain] Federal State and Local Jurisdiction [Member] State Income Tax Contingency [Line Items] Income Tax Contingency [Line Items] Gain On Sale Of Patent Assets Before Tax Gain On Sale Of Patent Assets Before Tax Represent Amount gain on sale of patent assets before tax. Schedule Of Variable Interest Entities [Table] Schedule of Variable Interest Entities [Table] Variable Interest Entities [Axis] Variable Interest Entities [Axis] Variable Interest Entity, Classification [Domain] Variable Interest Entity, Classification [Domain] Variable Interest Entity, Primary Beneficiary [Member] Variable Interest Entity, Primary Beneficiary Variable Interest Entity [Line Items] Variable Interest Entity [Line Items] Variable Interest Entity, Nonexistence Flag Variable Interest Entity, Nonexistence Flag Variable Interest Entity, Nonconsolidated, Carrying Amount, Assets and Liabilities, Net The carrying amount of the assets and liabilities of this entity in balance sheet Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount Involvement with entity Variable Interest Entity, Similar Entity Aggregation, Description Variable Interest Entity, Similar Entity Aggregation, Description Schedule Of Restructuring and Related Costs [Table] Schedule of Restructuring and Related Costs [Table] Restructuring Type [Axis] Restructuring Type [Axis] Type Of Restructuring [Domain] Type of Restructuring [Domain] Facility Closing [Member] Facility Closing Restructuring Cost and Reserve [Line Items] Restructuring Cost and Reserve [Line Items] Restructuring Reserve [Roll Forward] Restructuring Reserve [Roll Forward] Restructuring Reserve Balance Balance Balance Restructuring and Related Cost, Incurred Cost Expense Shutdown costs Restructuring Reserve, Settled With Cash Utilization Aggregate Estimated Restructuring and Related Costs Aggregate Estimated Restructuring And Related Costs Aggregate Estimated Restructuring And Related Costs Represent Amount to be charged against earnings in the current and future periods for the specified restructuring cost. Former President And Chief Executive Officer [Member] Former Highest ranking executive officer, who has ultimate managerial responsibility for the entity and who reports to the board of directors. In addition, the chief executive officer (CEO) may also be the chairman of the board or president. Former President And Chief Executive Officer Dividends [Abstract] Common Stock, Dividends, Per Share, Declared Declared a special cash dividend per share (in dollars per share) Dividends, Common Stock, Cash Cash dividend Paid