Stockholders' Equity Note [Abstract] Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Balance at beginning of period Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest Net income Net Income (Loss) Attributable to Parent Treasury stock purchased Treasury Stock, Value, Acquired, Cost Method Stock-based compensation Adjustments to Additional Paid in Capital, Share-based Compensation, Stock Options, Requisite Service Period Recognition Tax benefit - stock option exercises Adjustments to Additional Paid in Capital, Income Tax Benefit from Share-based Compensation Exercise of stock options Stock Issued During Period, Value, Stock Options Exercised Balance at end of period Unrealized Gain (Loss) on Investments Unrealized Gain (Loss) on Investments Investments, Debt and Equity Securities [Abstract] Schedule of Available-for-sale Securities Reconciliation Schedule of Available-for-sale Securities Reconciliation [Table Text Block] Available-for-sale Securities Available-for-sale Securities [Table Text Block] Disclosure of Compensation Related Costs, Share-based Payments [Abstract] Schedule of share-based compensation expense Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block] Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] Income Tax Disclosure [Abstract] Effective tax rate, forecasted Effective tax rate, forecasted The forecasted effective income tax rate for the period. Effective Income Tax Rate, Continuing Operations, Forecasted Increase (Decrease) in Rate Effective Income Tax Rate, Continuing Operations, Forecasted Increase (Decrease) in Rate This tag represents the increase or decrease between the prior period effective income tax rate and the current period forecasted effective income tax rate. Effective Income Tax Rate, Continuing Operations Effective Income Tax Rate, Continuing Operations Effective tax rate, including loss jurisdictions Effective tax rate, including loss jurisdictions The forecasted effective tax rate which includes loss jurisdiction for which no benefit from forecasted current year losses is anticipated. Unrecognized Tax Benefits that Would Impact Effective Tax Rate Unrecognized Tax Benefits that Would Impact Effective Tax Rate Effective Tax Rate, After Discreet Benefits Effective Tax Rate, After Discreet Benefits Effective Tax Rate, After Discreet Benefits Supplemental Cash Flow Elements [Abstract] Other Significant Noncash Transactions [Table] Other Significant Noncash Transactions [Table] Business Acquisition [Axis] Business Acquisition [Axis] Business Acquisition, Acquiree [Domain] Business Acquisition, Acquiree [Domain] VCON Video Conferencing, Ltd. (VCON) VCON Video Conferencing, Ltd. (VCON) [Member] VCON Video Conferencing, Ltd. (VCON) [Member] Other Significant Noncash Transactions [Line Items] Other Significant Noncash Transactions [Line Items] Inventory Noncash or Part Noncash Acquisition, Inventory Acquired Property and equipment Noncash or Part Noncash Acquisition, Fixed Assets Acquired Product warranty liability Noncash or Part Noncash Acquisition, Other Liabilities Assumed Proprietary software Noncash or Part Noncash Acquisition, Intangible Assets Acquired Goodwill Noncash or Part Noncash Acquisition, Goodwill Acquired Noncash or Part Noncash Acquisition, Goodwill Acquired Total Non-cash Transactions Noncash or Part Noncash Acquisition, Net Nonmonetary Assets Acquired (Liabilities Assumed) Fair Value Disclosures [Abstract] Schedule of Available-for-sale Securities [Table] Schedule of Available-for-sale Securities [Table] Measurement Frequency [Axis] Measurement Frequency [Axis] Fair Value, Measurement Frequency [Domain] Fair Value, Measurement Frequency [Domain] Fair Value, Measurements, Recurring [Member] Fair Value, Measurements, Recurring [Member] 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 [Member] Fair Value, Inputs, Level 2 [Member] Fair Value, Inputs, Level 2 [Member] Fair Value, Inputs, Level 3 [Member] Fair Value, Inputs, Level 3 [Member] Major Types of Debt and Equity Securities [Axis] Major Types of Debt and Equity Securities [Axis] Major Types of Debt and Equity Securities [Domain] Major Types of Debt and Equity Securities [Domain] Corporate Debt Securities [Member] Corporate Debt Securities [Member] Municipal Bonds [Member] Municipal Bonds [Member] Schedule of Available-for-sale Securities [Line Items] Schedule of Available-for-sale Securities [Line Items] Available-for-sale Securities, Fair Value Disclosure Available-for-sale Securities, Fair Value Disclosure Fair Value Measurements Fair Value Disclosures [Text Block] Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] Accounting Policies [Abstract] Earnings Per Share, Basic and Diluted [Abstract] Earnings Per Share, Basic and Diluted [Abstract] Numerator: Weighted Average Number of Shares Outstanding, Basic [Abstract] Basic weighted average shares outstanding Weighted Average Number of Shares Outstanding, Basic Dilutive common stock equivalents using treasury stock method Incremental Common Shares Attributable to Equity Unit Purchase Agreements Diluted weighted average shares outstanding Weighted Average Number of Shares Outstanding, Diluted Basic earnings per common share Earnings Per Share, Basic Diluted earnings per common share Earnings Per Share, Diluted Weighted average options outstanding Incremental Common Shares Attributable to Share-based Payment Arrangements Anti-dilutive options not included in the computations Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Statement of Cash Flows [Abstract] Statement [Table] Statement [Table] Scenario [Axis] Scenario [Axis] Scenario, Unspecified [Domain] Scenario, Unspecified [Domain] Statement [Line Items] Statement [Line Items] Cash flows from operating activities: Net Cash Provided by (Used in) Operating Activities [Abstract] Adjustments to reconcile net income to net cash provided by operations: Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Depreciation and amortization expense Other Depreciation and Amortization Amortization of deferred rent Other Amortization of Deferred Charges Share-based compensation expense Employee Benefits and Share-based Compensation Provision for (recoveries of) doubtful accounts, net Provision for Doubtful Accounts Inventory valuation reserve adjustments Inventory Write-down Excess Tax Benefit (Tax Deficiency) from Share-based Compensation, Operating Activities Excess Tax Benefit (Tax Deficiency) from Share-based Compensation, Operating Activities Changes in operating assets and liabilities: Increase (Decrease) in Operating Capital [Abstract] Receivables Increase (Decrease) in Receivables Inventories Increase (Decrease) in Inventories Deferred income taxes Increase (Decrease) in Deferred Income Taxes Prepaid expenses and other assets Increase (Decrease) in Prepaid Expense and Other Assets Accounts payable Increase (Decrease) in Accounts Payable Accrued liabilities Increase (Decrease) in Accrued Liabilities Income taxes payable Increase (Decrease) in Income Taxes Payable, Net of Income Taxes Receivable Deferred product revenue Increase (Decrease) in Deferred Revenue Other long-term liabilities Increase (Decrease) in Other Operating Assets and Liabilities, Net Net cash (used in) 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 property and equipment Payments to Acquire Property, Plant, and Equipment Purchase of marketable securities Payments to Acquire Marketable Securities Payment towards business acquisitions Other Payments to Acquire Businesses 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 the exercise of stock options Proceeds from Issuance of Shares under Incentive and Share-based Compensation Plans, Including Stock Options Excess Tax Benefit (Tax Deficiency) from Share-based Compensation, Financing Activities Excess Tax Benefit (Tax Deficiency) from Share-based Compensation, Financing Activities Treasury stock purchased Payments for Repurchase of Common Stock Net cash (used in) financing activities Net Cash Provided by (Used in) Financing Activities Net (decrease) in cash and cash equivalents Cash and Cash Equivalents, Period Increase (Decrease) Cash and cash equivalents at the beginning of the period Cash and Cash Equivalents, at Carrying Value Cash and cash equivalents at the end of the period Supplemental disclosure of cash flow information: Cash paid for income taxes Income Taxes Paid Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [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 Goods, Total [Member] Cost of Goods, Total [Member] Selling and Marketing Expense [Member] Selling and Marketing Expense [Member] Research and Development Expense [Member] Research and Development Expense [Member] General and Administrative Expense [Member] General and Administrative Expense [Member] Plan Name [Axis] Plan Name [Axis] Plan Name [Domain] Plan Name [Domain] Award Type [Axis] Award Type [Axis] Award Type [Domain] Award Type [Domain] Employee Stock Option [Member] Employee Stock Option [Member] Class of Stock [Axis] Class of Stock [Axis] Class of Stock [Domain] Class of Stock [Domain] Range [Axis] Range [Axis] Range [Domain] Range [Domain] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Allocated Share-based Compensation Expense Allocated Share-based Compensation Expense unrecognized compensation cost related to non-vested stock options, net of forfeitures Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized Outstanding, weighted average remaining contractual term (in years) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term Options, grants in period, gross Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract] Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract] Risk-free interest rate, average Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate Expected option life, average Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term Expected price volatility, average Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate Weighted average per share fair value Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value Schedule of Shareholders' Equity Schedule of Stockholders Equity [Table Text Block] Goodwill and Intangible Assets Disclosure [Abstract] Schedule of Finite and Indefinite Lived Intangible Assets by Major Class [Table] Schedule of Finite and Indefinite Lived Intangible Assets by Major Class [Table] [Table] Minimum Minimum [Member] Maximum Maximum [Member] 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] Tradename Trade Names [Member] Patents and technological know-how Patents and Technology [Member] Patents and Technology [Member] Proprietary software Proprietary Software [Member] Proprietary Software [Member] Other Other Credit Derivatives [Member] Indefinite-lived Intangible Assets by Major Class [Axis] Indefinite-lived Intangible Assets by Major Class [Axis] Indefinite-lived Intangible Assets, Major Class Name [Domain] Indefinite-lived Intangible Assets, Major Class Name [Domain] In-process research and development In-process Research and Development [Member] In-process Research and Development [Member] Finite and Indefiite-Lived Intangible Assets [Line Items] Finite and Indefiite-Lived Intangible Assets [Line Items] Finite and Indefiite-Lived Intangible Assets [Line Items] Finite-lived intangible assets, useful life (in years) Finite-Lived Intangible Asset, Useful Life Finite-lived intangible assets, gross Finite-Lived Intangible Assets, Gross Indefinite-lived Intangible Assets Indefinite-Lived Intangible Assets (Excluding Goodwill) Total finite and indefinite-lived intangible assets, gross Finite and Indefinite-Lived Intangible Assets, Gross Finite and Indefinite-Lived Intangible Assets, Gross Accumulated amortization Finite-Lived Intangible Assets, Accumulated Amortization Intangibles, net Intangible Assets, Net (Excluding Goodwill) Amortization of Intangible Assets Amortization of Intangible Assets Warranty Costs Standard Product Warranty, Policy [Policy Text Block] Schedule of Finite-Lived and Indefinite-Lived Intangible Assets Schedule of Finite-Lived and Indefinite-Lived Intangible Assets [Table Text Block] Schedule of Finite-Lived and Indefinite-Lived Intangible Assets [Table Text Block] Schedule of Finite-Lived Intangible Assets Amortization Expense Schedule of Finite-Lived Intangible Assets Amortization Expense [Table Text Block] Schedule of Finite-Lived Intangible Assets Amortization Expense [Table Text Block] Schedule of Finite-Lived Intangible Assets, Future Amortization Expense Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block] Statement of Financial Position [Abstract] Allowance for doubtful accounts Allowance for Doubtful Accounts Receivable, Current Common Stock: Common Stock, Number of Shares, Par Value and Other Disclosures [Abstract] Par value (in dollars per share) Common Stock, Par or Stated Value Per Share Common stock, shares authorized (in shares) Common Stock, Shares Authorized Common stock, sharse issued (in shares) Shares, Issued Common stock, shares outstanding (in shares) Common Stock, Shares, Outstanding Debt Security [Axis] Debt Security [Axis] Major Types of Debt Securities [Domain] Major Types of Debt Securities [Domain] Available-for-sale Securities, Amortized Cost Basis Available-for-sale Securities, Amortized Cost Basis Available-for-sale Securities, Gross Unrealized Gains Available-for-sale Securities, Gross Unrealized Gains Available-for-sale Securities, Gross Unrealized Losses Available-for-sale Securities, Gross Unrealized Losses Available-for-sale Securities, Fair Value Disclosure Intangible Assets Intangible Assets Disclosure [Text Block] Document and Entity Information -- None. No documentation exists for this element. -- Document Information [Table] Document Information [Table] Document Information, Document [Axis] Document Information, Document [Axis] Document [Domain] Document [Domain] Document Information [Line Items] Document Information [Line Items] Entity Registrant Name Entity Registrant Name Document Type Document Type Document Period End Date Document Period End Date Amendment Flag Amendment Flag Entity Central Index Key Entity Central Index Key Current Fiscal Year End Date Current Fiscal Year End Date Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Entity Filer Category Entity Filer Category Entity Current Reporting Status Entity Current Reporting Status Entity Voluntary Filers Entity Voluntary Filers Entity Well-known Seasoned Issuer Entity Well-known Seasoned Issuer Document Fiscal Year Focus Document Fiscal Year Focus Document Fiscal Period Focus Document Fiscal Period Focus Subsequent Events [Abstract] Subsequent Events Subsequent Events [Text Block] Inventory Disclosure [Abstract] Inventories Inventory Disclosure [Text Block] ASSETS Assets [Abstract] Current assets: Assets, Current [Abstract] Cash and cash equivalents Marketable securities Marketable Securities, Current Receivables, net of allowance for doubtful accounts of $94 and $60, respectively Accounts Receivable, Net, Current Inventories, net Inventory, Net Deferred income taxes Deferred Tax Assets, Net of Valuation Allowance, Current Prepaid expenses and other assets Other Assets, Current Total current assets Assets, Current Long-term marketable securities Marketable Securities, Noncurrent Long-term inventories, net Inventory, Noncurrent Property and equipment, net Property, Plant and Equipment, Net Goodwill Goodwill Deferred income taxes Deferred Tax Assets, Net of Valuation Allowance, Noncurrent Other assets Other Assets, Noncurrent Total assets Assets LIABILITIES AND SHAREHOLDERS' EQUITY Liabilities and Equity [Abstract] Current Liabilities: Liabilities, Current [Abstract] Accounts payable Accounts Payable, Current Accrued liabilities Accrued Liabilities, Current Income taxes payable Taxes Payable, Current Deferred product revenue Deferred Revenue, Current Total current liabilities Liabilities, Current Deferred rent Deferred Rent Credit, Noncurrent Other long-term liabilities Other Liabilities, Noncurrent Total liabilities Liabilities Shareholders' equity: Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest [Abstract] Common stock, par value $0.001, 50,000,000 shares authorized, 9,004,901 and 9,163,462 shares issued and outstanding Common Stock, Value, Issued Additional paid-in capital Additional Paid in Capital, Common Stock Accumulated other comprehensive loss Accumulated Other Comprehensive Income (Loss), Net of Tax Retained earnings Retained Earnings (Accumulated Deficit) Total shareholders' equity Total liabilities and shareholders' equity Liabilities and Equity Income Taxes Income Tax Disclosure [Text Block] Business Description, Basis of Presentation and Significant Accounting Policies Organization, Consolidation, Basis of Presentation, Business Description and Accounting Policies [Text Block] Schedule of Product Warranty Liability Schedule of Product Warranty Liability [Table Text Block] Schedule of Earnings Per Share, Basic and Diluted Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Available-for-sale Securities, Debt Maturities, Next Twelve Months, Amortized Cost Basis Available-for-sale Securities, Debt Maturities, Next Twelve Months, Amortized Cost Basis Available-for-sale Securities, Debt Maturities, Next Twelve Months, Fair Value Available-for-sale Securities, Debt Maturities, Next Twelve Months, Fair Value Available-for-sale Securities, Debt Maturities, Year Two Through Five, Amortized Cost Basis Available-for-sale Securities, Debt Maturities, Year Two Through Five, Amortized Cost Basis Available-for-sale Securities, Debt Maturities, Year Two Through Five, Fair Value Available-for-sale Securities, Debt Maturities, Year Two Through Five, Fair Value Available-for-sale Securities, Debt Maturities, Year Six Through Ten, Amortized Cost Basis Available-for-sale Securities, Debt Maturities, Year Six Through Ten, Amortized Cost Basis Available-for-sale Securities, Debt Maturities, Year Six Through Ten, Fair Value Available-for-sale Securities, Debt Maturities, Year Six Through Ten, Fair Value Income Statement [Abstract] Revenue Revenue, Net Cost of goods sold Cost of Goods Sold Gross profit Gross Profit Operating expenses: Operating Expenses [Abstract] Sales and marketing Selling and Marketing Expense Research and product development Research and Development Expense General and administrative General and Administrative Expense Proceeds from litigation, net Other Operating Income Total operating expenses Operating Expenses Operating income Operating Income (Loss) Other income (expense), net Other Operating Income (Expense), Net Income before income taxes Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest Provision for income taxes Income Tax Expense (Benefit) Basic earnings per common share Diluted earnings per common share Diluted weighted average shares outstanding Unrealized gain (loss) on available-for-sale securities Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Net of Tax Comprehensive income Comprehensive Income (Loss), Net of Tax, Attributable to Parent Schedule of inventory, net of reserves Schedule of Inventory, Current and Non-Current [Table Text Block] Schedule of Inventory, Current and Non-Current [Table Text Block] Schedule of Non-Current Inventory Valuation Losses Schedule of Non-Current Inventory Valuation Losses [Table Text Block] Schedule of Non-Current Inventory Valuation Losses [Table Text Block] Losses incurred on valuation of inventory and write-off of obsolete inventory Loss On Inventory Valuation With Obsolete Inventory Write Off Loss On Inventory Valuation With Obsolete Inventory Write Off Current: Raw materials Inventory, Raw Materials, Net of Reserves Finished goods Inventory, Finished Goods, Net of Reserves Inventories, current Long-term: Assets, Noncurrent [Abstract] Raw materials Inventory, Noncurrent, Raw Materials, Net of Reserves Inventory, Noncurrent, Raw Materials, Net of Reserves Finished Goods Inventory, Noncurrent, Finished Goods, Net of Reserves Inventory, Noncurrent, Finished Goods, Net of Reserves Inventory, Noncurrent Inventory, finished goods, amount under consignment Inventory, Finished Goods, Net of Reserves, Amount Under Consignment Inventory, Finished Goods, Net of Reserves, Amount Under Consignment Marketable Securities Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block] 2013 (remainder) Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months 2014 Finite-Lived Intangible Assets, Amortization Expense, Year Two 2015 Finite-Lived Intangible Assets, Amortization Expense, Year Three 2016 Finite-Lived Intangible Assets, Amortization Expense, Year Four 2017 Finite-Lived Intangible Assets, Amortization Expense, Year Five Thereafter Finite-Lived Intangible Assets, Amortization Expense, after Year Five Finite-Lived Intangible Assets, Net Finite-Lived Intangible Assets, Net Share-Based Compensation Expense Shareholders' Equity and Share-based Payments [Text Block] Shareholders' Equity Stockholders' Equity Note Disclosure [Text Block] Product Warranty Accrual Product Warranty Accrual Warranty accruals/additions Product Warranty Accrual, Warranties Issued Warranty Usage Product Warranty Accrual, Payments