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 Well-Known Seasoned Issuer Entity Well-known Seasoned Issuer Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Entity Public Float Entity Public Float 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 equivalents, which primarily include money market funds Cash and cash equivalents Cash and cash equivalents, beginning of year Cash and cash equivalents, end of year Accounts Receivable, Net Accounts receivable (less allowance for doubtful accounts of $20 at December 31, 2014 and 2013) Accounts receivable, net Inventory, Net Inventories Total Deferred Tax Assets, Net, Current Deferred tax assets 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 Deferred Tax Assets, Net, Noncurrent Long term deferred tax assets Other Assets, Noncurrent Other assets Other Assets, Noncurrent, Total 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 fees Deferred Revenue, Current Deferred revenue Deferred Revenue, Current, Total Total Current Liabilities Total current liabilities Total current liabilities Deferred Revenue, Noncurrent Long-term deferred revenue Deferred Revenue, Noncurrent, Total Commitments and Contingencies Commitments and contingent liabilities (Note 9) 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; shares authorized, 70,000,000 in 2014 and 2013; issued and outstanding 22,808,761 in 2014 and 22,574,251 in 2013 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 Unrealized losses on investments Accumulated other comprehensive loss Unrealized losses on investments Retained Earnings (Accumulated Deficit) 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 Allowance For Doubtful Accounts Receivable, Current Allowance for doubtful accounts (in dollars) 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: License and Services Revenue Software licenses Maintenance Revenue Software maintenance Sales Revenue, Services, Net Services Hardware Sales Hardware Represents hardware sales. Royalty Revenue Royalties Revenue, Net Revenue Revenue Total revenue Costs and Expenses [Abstract] Costs and expenses: Cost Of Hardware Sales Cost of hardware Represents cost of hardware sales. Cost Of Services Cost of services Research And Development Expense Research and development Selling and Marketing Expense Selling and marketing General and Administrative Expense General and administrative Total Costs and Expenses Expenses Total costs and expenses Total costs and expenses Income From Patent Arrangement Income from patent arrangement The net result for the period of deducting operating expenses from operating revenues including patent related income. Receivable from patent arrangement Operating Income Loss After Patent Related Income Operating income Operating income after patent related income The net result for the period of deducting operating expenses from operating revenues after patent related income. Operating income Other Income Other income Other income (expense) Investment Income, Interest Interest income Income (Loss) From Continuing Operations Before Income Taxes, Extraordinary Items, Noncontrolling Interest Income (loss) before income taxes Income from continuing operations before income taxes Income from continuing operations before income taxes Income from continuing operations before income taxes Income Tax Expense (Benefit) Income tax expense Provision for income taxes Total provision for income taxes Provision for income taxes Income (Loss) from Continuing Operations Attributable to Parent Income from continuing operations Income from continuing operations Income from continuing operations Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent Income (loss) from discontinued operations Loss from discontinued operations, net of income taxes Loss from discontinued operation Loss from discontinued operations Income from discontinued operations, net of tax Net Income (Loss) Attributable To Parent Net income (loss) Net income Net income Earnings Per Share, Basic [Abstract] Basic net income per share: Income (Loss) From Continuing Operations, Per Basic Share Basic net income per share from continuing operations (in dollars per share) Income (Loss) From Discontinued Operations, Net Of Tax, Per Basic Share Basic net loss per share from discontinued operations (in dollars per share) Earnings Per Share, Basic Basic net income per share (in dollars per share) Net income (loss) per share - basic (in dollars per share) Basic net income per share (in dollars per share) Earnings Per Share, Diluted [Abstract] Diluted net income per share: Income (Loss) From Continuing Operations, Per Diluted Share Diluted net income per share from continuing operations (in dollars per share) Income (Loss) From Discontinued Operations, Net Of Tax, Per Diluted Share Diluted net loss per share from discontinued operations (in dollars per share) Earnings Per Share, Diluted Diluted net income per share (in dollars per share) Net income (loss) per share - diluted (in dollars per share) Diluted net income per share (in dollars per share) Weighted Average Number Of Shares Outstanding, Basic Weighted-average shares - basic (in shares) Weighted-average common shares outstanding Weighted Average Number of Shares Outstanding, Basic, Total Weighted Average Number Of Shares Outstanding, Diluted Weighted-average shares - diluted (in shares) Diluted shares outstanding Diluted shares outstanding Comprehensive Income (Loss), Net Of Tax, Attributable To Parent [Abstract] Comprehensive income: Other Comprehensive Income (Loss), Net of Tax [Abstract] Accumulated other comprehensive loss: Other comprehensive income (net of tax): Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Net of Tax Unrealized gain/(loss) on available for sale securities Unrealized losses on available for sale securities Unrealized losses on investments Comprehensive Income (Loss), Net Of Tax, Attributable To Parent Comprehensive income Comprehensive income Statement Of Cash Flows [Abstract] Statement 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 (used in) operating activities: Depreciation, Depletion and Amortization Depreciation and amortization Depreciation and amortization Share-Based Compensation Stock-based compensation Stock-based compensation Gain (Loss) on Disposition of Intangible Assets Patent related income Gain on sale of patent assets Gain on sale of patent assets Accretion (Amortization) Of Discounts and Premiums, Investments Amortization of discount on investments Amortization of premium (discount) on investments Gain (Loss) On Sale Of Investments Gain on sale of investments (Gain)/loss on sale of investments Deferred Tax Expenses Benefit On Unrealized Losses On Available For Sale Securities Deferred tax benefit (expense) on other comprehensive income Amount of tax expense (benefit) of unrealized holding gain (loss) on available-for-sale securities. Gain (Loss) on Disposition of Property Plant Equipment Loss on disposal of property and equipment Provision For Doubtful Accounts Provision for doubtful accounts Increase (Decrease) In Operating Capital [Abstract] Increase (decrease) from changes in assets and liabilities: Increase (Decrease) In Accounts Receivable Accounts receivable Accounts receivable Increase Decrease In Receivable From Patent Arrangement This element represents increase decrease in receivable from patent arrangement. Receivable from patent arrangement 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 Deferred Income Taxes Deferred tax assets Deferred tax assets Increase (Decrease) In Accounts Payable Accounts payable Accounts payable Increase (Decrease) In Accrued Liabilities Accrued expenses, compensation and professional Increase (Decrease) In Deferred Revenue Deferred revenue Net Cash Provided by (Used in) Operating Activities Net cash provided by (used in) operating activities Net Cash Provided by (Used in) Investing Activities [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 Property, Plant, and Equipment Proceeds from sale of property and equipment Payments To Acquire Investments Purchases of investments Purchases of investments Proceeds from Sale of Available-for-sale Securities, Debt Sales of investments Sales of investments Proceeds from Sale of Intangible Assets Proceeds from sale of patent assets, net Proceeds from sale of patent assets, net Payments to Acquire Other Productive Assets Purchase of other assets Purchase of other assets Net Cash Provided by (Used in) Investing Activities Net cash provided by (used in) investing activities Net Cash Provided by (Used in) Financing Activities [Abstract] Cash flows from financing activities: Proceeds From Issuance Of Common Stock Proceeds from issuance of common stock Payments Of Dividends Payment of dividends Payment of dividends Excess Tax Benefit from Share-based Compensation, Operating Activities Excess tax benefits from stock-based compensation Excess tax benefits from stock-based compensation Payments Related to Tax Withholding for Share-based Compensation Shares surrendered by employees to pay taxes related to unrestricted stock Payments made for taxes of employees who surrendered shares related to unrestricted stock Payments For Repurchase Of Common Stock Repurchase of common stock Repurchase of common stock 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/(decrease) in cash and cash equivalents Supplemental Cash Flow Information [Abstract] Supplemental disclosure: Income Taxes Paid Cash paid for income taxes Statement Of Stockholders' Equity [Abstract] Statement of Stockholders' Equity [Abstract] Statement [Table] Statement [Table] Equity Components [Axis] Equity Components [Axis] 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] (Accumulated Deficit) Equity Component [Domain] Equity Component [Domain] Statement [Line Items] Statement [Line Items] 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 Exercised Exercise of common stock options (in shares) Exercised Employees exercised stock options Issuance Of Unrestricted Stock Issuance of unrestricted stock Issuance Of Unrestricted Stock (In Shares) Issuance of unrestricted stock (in shares) Issuance of unrestricted stock (in shares) 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. Shares surrendered by employees to pay taxes related to unrestricted stock (in shares) Issuance Of Common Stock Under 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 Tax benefits from stock-based awards Stock-based compensation expense Adjustments To Additional Paid In Capital, Income Tax Benefit From Share-Based Compensation Tax benefits from stock-based awards Stock Issued During Period, Value, Stock Dividend Dividend payment Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, before Tax Unrealized gain (loss) on securities Other Comprehensive Income (Loss), Available-for-sale Securities, Tax Deferred tax benefit (expense) on unrealized gain (loss) Organization, Consolidation and Presentation Of Financial Statements [Abstract] Organization, Consolidation and Presentation of Financial Statements [Abstract] Nature Of Operations [Text Block] NATURE OF BUSINESS Accounting Policies [Abstract] Accounting Policies [Abstract] Significant Accounting Policies [Text Block] SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Goodwill and Intangible Assets Disclosure [Abstract] Intangible Assets Disclosure [Text Block] PATENT RELATED INCOME Discontinued Operations and Disposal Groups [Abstract] Discontinued Operations and Disposal Groups [Abstract] Disposal Groups, Including Discontinued Operations, Disclosure [Text Block] DISCONTINUED OPERATIONS Inventory Disclosure [Abstract] Inventory Disclosure [Abstract] Inventory Disclosure [Text Block] INVENTORIES Property, Plant and Equipment [Abstract] Property, Plant and Equipment [Abstract] Property, Plant and Equipment Disclosure [Text Block] PROPERTY AND EQUIPMENT Income Tax Disclosure [Abstract] Income Tax Disclosure [Abstract] Income Tax Disclosure [Text Block] INCOME TAXES Shareholders Equity and Share Based Payments [Abstract] Shareholders Equity and Share Based Payments [Abstract] Shareholders' Equity and Share-Based Payments [Text Block] EQUITY AND STOCK COMPENSATION PLANS Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Text Block] COMMITMENTS AND CONTINGENT LIABILITIES Segment Reporting [Abstract] Segment Reporting [Abstract] Segment Reporting Disclosure [Text Block] BUSINESS SEGMENTS AND MAJOR CUSTOMERS Compensation and Retirement Disclosure [Abstract] Compensation and Retirement Disclosure [Abstract] Pension and Other Postretirement Benefits Disclosure [Text Block] EMPLOYEE BENEFIT PLAN Earnings Per Share [Abstract] Earnings Per Share [Abstract] Earnings Per Share [Text Block] NET INCOME PER SHARE Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract] Accumulated Other Comprehensive Income Loss [Text Block] This element represents disclosure of accumulated other comprehensive loss. Quarterly Financial Information Disclosure [Abstract] Quarterly Financial Information Disclosure [Abstract] Quarterly Financial Information [Text Block] QUARTERLY RESULTS OF OPERATIONS - UNAUDITED Off Balance Sheet Arrangements [Abstract] Off Balance Sheet Arrangements Disclosure [Text Block] OFF-BALANCE SHEET ARRANGEMENTS Represents the entire disclosure about off-balance sheet arrangements. Valuation and Qualifying Accounts [Abstract] Valuation and Qualifying Accounts [Abstract] Schedule Of Valuation and Qualifying Accounts Disclosure [Text Block] Schedule of valuation and qualifying accounts Basis Of Accounting, Policy [Policy Text Block] Basis of Presentation Use Of Estimates, Policy [Policy Text Block] Use of Estimates Fair Value Measurement, Policy [Policy Text Block] Fair Value Measurements Cash and Cash Equivalents, Policy [Policy Text Block] Cash and Cash Equivalents Investment, Policy [Policy Text Block] Investments Allowance For Doubtful Accounts [Policy Text Block] Allowance for Doubtful Accounts Disclosure of accounting policy for allowance for doubtful accounts. Inventory, Policy [Policy Text Block] Inventories