Disclosure of Compensation Related Costs, Share-based Payments [Abstract] 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] Income Statement Location [Axis] Income Statement Location [Axis] Income Statement Location [Domain] Income Statement Location [Domain] Cost of revenues Cost of Sales [Member] Research and development Research and Development Expense [Member] Sales and marketing Selling and Marketing Expense [Member] General and administrative General and Administrative Expense [Member] Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] Amounts for share-based compensation awards Allocated Share-based Compensation Expense Compensation and Retirement Disclosure [Abstract] Schedule of Defined Benefit Plans Disclosures [Table] Schedule of Defined Benefit Plans Disclosures [Table] Geographical [Axis] Geographical [Axis] Geographical [Domain] Geographical [Domain] United States UNITED STATES Canada CANADA Defined Benefit Plan Disclosure [Line Items] Defined Benefit Plan Disclosure [Line Items] Employer matching contributions Defined Benefit Plan, Contributions by Employer Employer matching contributions vesting period Defined Contribution Plan Employers Matching Contribution Vesting Period Defined contribution plan employers matching contribution vesting period. Income Tax Disclosure [Abstract] Federal tax benefit, at statutory rate Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount State benefit, net of federal benefit Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount Change in valuation allowance Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount Change in fair value of warrant Income Tax Reconciliation Business Combination Income Tax Reconciliation Business Combination Beneficial conversion feature Effective Income Tax Reconciliation, Beneficial Conversion Feature Effective Income Tax Reconciliation, Beneficial Conversion Feature Research and development credits Effective Income Tax Rate Reconciliation, Tax Credit, Research, Amount Share-based compensation Effective Income Tax Rate Reconciliation, Nondeductible Expense, Share-based Compensation Cost, Amount Uncertain tax positions Income Tax Reconciliation Change In Uncertain Tax Positions Income Tax Reconciliation Change In Uncertain Tax Positions Goodwill impairment Effective Income Tax Rate Reconciliation, Nondeductible Expense, Impairment Losses, Amount Change in state apportionment Change In State Apportionment Change In State Apportionment Other Effective Income Tax Rate Reconciliation, Deduction, Other, Amount Provision or income taxes Income Tax Expense (Benefit) Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Statement of Financial Position [Abstract] ASSETS Assets [Abstract] Current assets: Assets, Current [Abstract] Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Marketable securities Marketable Securities, Current Restricted marketable securities Marketable Securities, Restricted, Current Accounts receivable, net of allowance for doubtful accounts of $217 in 2014 and $2,449 in 2013 Accounts Receivable, Net, Current Inventories Inventory, Net Prepaid expenses and other Prepaid Expense and Other Assets, Current Total current assets Assets, Current Property and equipment Property, Plant and Equipment, Net Marketable securities Marketable Securities, Noncurrent Intangible assets, net of accumulated amortization of $14,050 in 2014 and $12,983 in 2013 Intangible Assets, Net (Excluding Goodwill) 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 expenses Accrued Liabilities, Current Current portion of shareholder litigation Loss Contingency, Accrual, Current Short-term margin loan facility Line of Credit, Current Total current liabilities Liabilities, Current Revolving credit facility Long-term Line of Credit, Noncurrent Other long-term liabilities Other Liabilities, Noncurrent Non-current portion of shareholder litigation Loss Contingency, Accrual, Noncurrent Total liabilities Liabilities Commitments and Contingencies Commitments and Contingencies Stockholders’ equity: Stockholders' Equity Attributable to Parent [Abstract] Preferred stock, par value $0.001; 2,000 shares authorized and none outstanding Preferred Stock, Value, Issued Common stock, par value $0.001; 100,000 shares authorized, 45,742 and 34,097 shares issued and outstanding at December 31, 2014 and 2013, respectively Common Stock, Value, Issued Additional paid-in capital Additional Paid in Capital Accumulated other comprehensive income Accumulated Other Comprehensive Income (Loss), Net of Tax Accumulated deficit Retained Earnings (Accumulated Deficit) Stockholders' equity before treasury stock Stockholders' Equity before Treasury Stock Treasury stock at cost; 2,436 common shares at December 31, 2014 and 2013 Treasury Stock, Value Total stockholders’ equity Stockholders' Equity Attributable to Parent Total liabilities and stockholders’ equity Liabilities and Equity Segment Reporting [Abstract] Segment Information and Concentrations of Risk Segment Reporting Disclosure [Text Block] Goodwill and Intangible Assets Disclosure [Abstract] Intangible Assets Intangible Assets Disclosure [Text Block] Schedule of Revenues from External Customers and Long-Lived Assets [Table] Schedule of Revenues from External Customers and Long-Lived Assets [Table] Europe, Latin America and Asia Europe Latin America And Asia [Member] Europe, Latin America and Asia. Revenues from External Customers and Long-Lived Assets [Line Items] Revenues from External Customers and Long-Lived Assets [Line Items] Assets by Geographic Concentration, Total Income Taxes Income Tax Disclosure [Text Block] Fair Value Disclosures [Abstract] Fair Value Measurements, Recurring and Nonrecurring [Table] Fair Value Measurements, Recurring and Nonrecurring [Table] Long-term Debt, Type [Axis] Long-term Debt, Type [Axis] Long-term Debt, Type [Domain] Long-term Debt, Type [Domain] Revolving Credit Facility Revolving Credit Facility [Member] Measurement Basis [Axis] Measurement Basis [Axis] Estimate of Fair Value Measurement Estimate of Fair Value Measurement [Member] Portion at Fair Value Measurement Portion at Fair Value Measurement [Member] Reported Value Measurement Reported Value Measurement [Member] 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] Long-term Debt Long-term Debt Derivative Instruments and Hedging Activities Disclosure [Abstract] Derivative Financial Instruments Derivative Instruments and Hedging Activities Disclosure [Text Block] Restructuring and Related Activities [Abstract] Restructuring Restructuring and Related Activities Disclosure [Text Block] Operating Loss Carryforwards [Table] Operating Loss Carryforwards [Table] Income Tax Authority [Axis] Income Tax Authority [Axis] Income Tax Authority [Domain] Income Tax Authority [Domain] Domestic Country Domestic Tax Authority [Member] Foreign Country Foreign Tax Authority [Member] State and Local Jurisdiction State and Local Jurisdiction [Member] Operating Loss Carryforwards [Line Items] Operating Loss Carryforwards [Line Items] Valuation allowances related to U.S. based deferred taxes Valuation Allowance, Deferred Tax Asset, Change in Amount Valuation allowance Deferred Tax Assets, Valuation Allowance Statutory federal income tax rate Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent Net operating loss carryforwards Operating Loss Carryforwards Net operating loss expiration dates Operating Loss Carryforwards Expiration Date One Operating Loss Carryforwards Expiration Date One Research and development tax credit carryforwards Deferred Tax Assets, Tax Credit Carryforwards, Research Tax credits expiration dates Deferred Tax Assets Tax Credit Carryforwards Research Expiration Dates Deferred Tax Assets Tax Credit Carryforwards Research Expiration Dates Internal revenue code related to annual use of operating loss carry forwards Internal Revenue Code Ownership Percentage Change Description Internal Revenue Code Ownership Percentage Change Description Internal revenue code, cumulative change in ownership (percent) Internal Revenue Code Ownership Percentage Change Internal Revenue Code Ownership Percentage Change Uncertain income tax position unrecognized Uncertain Income Tax Position Unrecognized Uncertain income tax position unrecognized. Settlements and lapses in statutes of limitations Recognized Tax Benefit Resulting From Lapse Of Applicable Statute Of Limitations Recognized Tax Benefit Resulting From Lapse Of Applicable Statute Of Limitations Associated interest due to expiration of the applicable statutes of limitations for certain tax years Unrecognized Tax Benefits, Interest on Income Taxes Expense Total liability for unrecognized tax benefits included other long-term liabilities Unrecognized Tax Benefits, Period Increase (Decrease) Interest and penalties related to unrecognized tax benefits in the provision for income taxes Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense Uncertain tax liability Increase Decrease In Uncertain Tax Positions Due To Reclassification To Liability Increase Decrease In Uncertain Tax Positions Due To Reclassification To Liability Summary of Income Taxes Income Tax Effects Allocated Directly To Equity Table [Text Block] Income tax effects allocated directly to equity. Summary of Income (Loss) before Taxes Schedule of Income before Income Tax, Domestic and Foreign [Table Text Block] Summary of Provision (Benefit) for Income Taxes Schedule of Components of Income Tax Expense (Benefit) [Table Text Block] Summary of Net Deferred Tax Assets Schedule of Deferred Tax Assets and Liabilities [Table Text Block] Summary of Provision (Benefit) for Income Taxes Reconciles to Amount Computed by Applying Statutory Federal Income Tax Rate Schedule of Effective Income Tax Rate Reconciliation [Table Text Block] Reconciliation of Beginning and Ending Amounts of Unrecognized Tax Benefits Schedule of Unrecognized Tax Benefits Roll Forward [Table Text Block] 2015 Operating Leases, Future Minimum Payments Due, Next Twelve Months 2016 Operating Leases, Future Minimum Payments, Due in Two Years 2017 Operating Leases, Future Minimum Payments, Due in Three Years 2018 Operating Leases, Future Minimum Payments, Due in Four Years 2019 Operating Leases, Future Minimum Payments, Due in Five Years Thereafter Operating Leases, Future Minimum Payments, Due Thereafter Total minimum lease payments Operating Leases, Future Minimum Payments Due Summary of Restructuring Liability Restructuring and Related Costs [Table Text Block] Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] Segments [Axis] Segments [Axis] Segments [Domain] Segments [Domain] Mobile Computing Products Mobile Computing Products [Member] Mobile computing products. M2M Products and Solutions Trade Secrets [Member] Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Net revenues by reportable segment: Sales Revenue, Goods, Net [Abstract] Net revenues Revenues Operating income (loss): Operating Income (Loss) [Abstract] Operating loss: Operating Income (Loss) Identifiable assets by reportable segment: Segment Reporting Information, Revenue for Reportable Segment [Abstract] Identifiable assets by reportable segment: Loss Contingencies [Table] Loss Contingencies [Table] Scenario [Axis] Scenario [Axis] Scenario, Unspecified [Domain] Scenario, Unspecified [Domain] Scenario, Forecast Scenario, Forecast [Member] Balance Sheet Location [Axis] Balance Sheet Location [Axis] Balance Sheet Location [Domain] Balance Sheet Location [Domain] Secured Promissory Note Secured Promissory Note [Member] Secured Promissory Note [Member] Award Type [Axis] Award Type [Axis] Equity Award [Domain] Equity Award [Domain] Unrestricted Stock Unrestricted Stock [Member] Unrestricted Stock [Member] Credit Facility [Axis] Credit Facility [Axis] Credit Facility [Domain] Credit Facility [Domain] Letter of Credit Letter of Credit [Member] Loss Contingencies [Line Items] Loss Contingencies [Line Items] Rental expense under operating leases Operating Leases, Rent Expense, Net Purchase commitments Long-term Purchase Commitment, Amount Period of time to achieve earnings and cash building targets Deferred Compensation Arrangement with Individual, Minimum Period Financial Metrics Must Be Met Deferred Compensation Arrangement with Individual, Minimum Period Financial Metrics Must Be Met Accrued bonus liability Deferred Compensation Arrangement with Individual, Recorded Liability Total estimated expense Deferred Compensation Arrangement with Individual, Compensation Expense Loss Contingency, Damages Paid, Value Loss Contingency, Damages Paid, Value Consideration For Litigation Settlement Paid By Companys Insurers Consideration For Litigation Settlement Paid By Companys Insurers Consideration For Litigation Settlement Paid By Companys Insurers Legal Settlements Shares Issued Value Legal Settlements Shares Issued Value Legal Settlements Shares Issued Value Legal Settlements Promissory Notes Issued Amount Legal Settlements Promissory Notes Issued Amount Legal Settlements Promissory Notes Issued Amount Secured note maturity period Debt Instrument, Term Secured note interest rate percentage Debt Instrument, Interest Rate, Stated Percentage Common Stock Distribution (shares) Common Stock Distribution Common Stock Distribution Amount for Share Price Fluctuation Related to Litigation Settlement Amount for Share Price Fluctuation Related to Litigation Settlement Amount for Share Price Fluctuation Related to Litigation Settlement Loss Contingency Damages Paid Net Of Portion Paid By Companys Insurers Loss Contingency Damages Paid Net Of Portion Paid By Companys Insurers Loss Contingency Damages Paid Net Of Portion Paid By Company's Insurers Company's unused borrowing capacity under credit facility Line of Credit Facility, Maximum Borrowing Capacity Line of Credit Facility, Amount Outstanding Line of Credit Facility, Amount Outstanding Available borrowings Line of Credit Facility, Remaining Borrowing Capacity Organization, Consolidation and Presentation of Financial Statements [Abstract] Finished goods Inventory, Finished Goods, Gross Raw materials and components Inventory, Raw Materials, Gross Total inventory Summary of Company's Financial Instruments, Fair Value on a Recurring Basis Fair Value Measurements, Recurring and Nonrecurring [Table Text Block] Fair Value, Liabilities Measured on Recurring and Nonrecurring Basis Fair Value, Liabilities Measured on Recurring and Nonrecurring Basis [Table Text Block] Statement of Stockholders' Equity [Abstract] Statement [Table] Statement [Table] Equity Components [Axis] Equity Components [Axis] Equity Component [Domain] Equity Component [Domain] Common Stock Common Stock [Member] Additional Paid-in Capital Additional Paid-in Capital [Member] Treasury Stock Treasury Stock [Member] Accumulated Deficit Retained Earnings [Member] Accumulated Other Comprehensive Income (Loss) Accumulated Other Comprehensive Income (Loss) [Member] Statement [Line Items] Statement [Line Items] Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Beginning Balance Beginning Balance, shares Shares, Issued Exercise of stock options, vesting of restricted stock units and shares issued under employee stock purchase plan, shares Stock Issued During Period Shares Exercise Of Stock Options Vesting Of Restricted Stock Units And Employee Stock Purchase Plan Stock issued during period shares exercise of stock options vesting of restricted stock units and employee stock purchase plan. Exercise of stock options, vesting of restricted stock units and shares issued under employee stock purchase plan Stock Issued During Period Value Exercise Of Stock Options Vesting Of Restricted Stock Units And Employee Stock Purchase Plan Stock issue during period value exercise of stock options vesting of restricted stock units and employee stock purchase plan. Issuance of common shares in litigation settlement (in shares) Stock Issued During Period, Shares, Litigation Settlement Stock Issued During Period, Shares, Litigation Settlement Issuance of common shares in connection with litigation settlement Stock Issued During Period, Value, Litigation Settlement Stock Issued During Period, Value, Litigation Settlement Issuance of common shares in HC2 financing transaction (in shares) Stock Issued During Period, Shares, New Issues Issuance of common shares in connection with financing transaction, net of issuance costs Stock Issued During Period, Value, New Issues Taxes withheld on net settled vesting of restricted stock units Taxes Withheld On Net Settled Vesting Of Restricted Stock Units Taxes withheld on net settled vesting of restricted stock units. Issuance of common shares for conversion of Series C Preferred Shares (in shares) Stock Issued During Period, Shares, Conversion of Convertible Securities Issuance of common shares in connection with the conversion of Series C preferred shares Stock Issued During Period, Value, Conversion of Convertible Securities Beneficial conversion feature of convertible Series C preferred shares Adjustment to Paid in Capital, Beneficial Conversion Feature Adjustment to Paid in Capital, Beneficial Conversion Feature Reclassification of warrant liability Adjustments to Additional Paid in Capital, Warrant Issued Share-based compensation (in shares) Stock Issued During Period, Shares, Share-based Compensation, Net of Forfeitures Share-based compensation Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition Net loss Net Income (Loss) Attributable to Parent Other comprehensive income (loss) Other Comprehensive Income (Loss), Net of Tax Ending Balance Ending Balance, shares Deferred tax assets: Components of Deferred Tax Assets [Abstract] Accrued expenses Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Accrued Liabilities Inventory obsolescence provision Deferred Tax Assets, Inventory Depreciation and amortization Deferred Tax Assets, Property, Plant and Equipment Deferred rent Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Deferred Rent Net operating loss and tax credit carryforwards Deferred Tax Assets Net Operating Loss And Tax Credit Carryforwards Deferred tax assets net operating loss and tax credit carryforwards. Stock-based compensation Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Share-based Compensation Cost Unrecognized tax benefits Deferred Tax Assets Unrecognized Tax Benefits Deferred tax assets unrecognized tax benefits. Deferred tax assets Deferred Tax Assets, Gross Deferred tax liabilities: Components of Deferred Tax Liabilities [Abstract] Amortization of acquired intangibles Deferred Tax Liabilities, Intangible Assets Net deferred tax assets Deferred Tax Assets Liabilities Gross Deferred tax assets and liabilities gross. Valuation allowance Net deferred tax assets Deferred Tax Assets, Net Movement in Standard Product Warranty Accrual [Roll Forward] Movement in Standard Product Warranty Accrual [Roll Forward] Warranty liability at beginning of period Product Warranty Accrual Additions charged to operations Product Warranty Accrual, Warranties Issued Deductions from liability Product Warranty Accrual, Payments Warranty liability at end of period Accounts receivable, net of allowance for doubtful accounts Allowance for Doubtful Accounts Receivable, Current Intangible assets, net of accumulated amortization Acquired Intangible Assets Accumulated Amortization Acquired intangible assets accumulated amortization. Preferred stock, par value Preferred Stock, Par or Stated Value Per Share Preferred stock, shares authorized Preferred Stock, Shares Authorized Preferred stock, shares outstanding Preferred Stock, Shares Outstanding Common stock shares issued at 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 Treasury stock, shares Treasury Stock, Shares Fair Value, Hierarchy [Axis] Fair Value, Hierarchy [Axis] Fair Value, Measurement Frequency [Domain] Fair Value Hierarchy [Domain] Fair Value, Measurements, Recurring Fair Value, Measurements, Recurring [Member] Level 1 Fair Value, Inputs, Level 1 [Member] Level 2 Fair Value, Inputs, Level 2 [Member] Asset Class [Axis] Asset Class [Axis] Asset Class [Domain] Asset Class [Domain] Money market funds Money Market Funds [Member] US Treasury securities US Treasury Securities [Member] Certificates of deposit Certificates of Deposit [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] Government agency securities US Government Agencies Debt Securities [Member] Municipal bonds Municipal Bonds [Member] Corporate debentures / bonds Corporate Debentures Bonds [Member] Corporate debentures bonds. Assets: Assets, Fair Value Disclosure [Abstract] Cash equivalents Cash and Cash Equivalents, at Carrying Value [Abstract] Total cash equivalents Cash Equivalents, at Carrying Value Short-term & Long term marketable securities: Marketable Securities, Current [Abstract] Available-for-sale: Available-for-sale Securities [Abstract] Total short-term marketable securities Short-term Investments Total long-term marketable securities Long-term Investments Total financial assets Assets, Fair Value Disclosure Statement of Cash Flows [Abstract] Cash flows from operating activities: Net Cash Provided by (Used in) Operating Activities [Abstract] Adjustments to reconcile net loss to net cash used in operating activities: Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Depreciation and amortization Depreciation, Depletion and Amortization, Nonproduction Loss on goodwill and purchased intangible assets impairment Goodwill and Intangible Asset Impairment Impairment loss on equipment, leasehold improvements and software license intangible assets Impairment Loss On Equipment And Software License Intangible Assets Impairment Loss On Equipment And Software License Intangible Assets Provision for bad debts, net of recoveries Provision for Doubtful Accounts Net impairment loss on marketable securities Marketable Securities, Gain (Loss), Excluding Other than Temporary Impairments Provision for excess and obsolete inventory Inventory Write-down Share-based compensation expense Share-based Compensation Change in fair value of warrant liability and fair value of beneficial conversion feature on convertible Series C preferred shares Fair Value Adjustment of Warrants, Cash Portion Fair Value Adjustment of Warrants, Cash Portion Shareholder litigation loss Contingent Loss For Litigation, Noncash Portion Contingent Loss For Litigation, Noncash Portion Non-cash income tax expense Non Cash Income Tax Expense Benefit Non Cash Income Tax Expense Benefit Changes in assets and liabilities: Increase (Decrease) in Operating Capital [Abstract] Accounts receivable Increase (Decrease) in Accounts Receivable Inventories Increase (Decrease) in Inventories Prepaid expenses and other assets Increase (Decrease) in Prepaid Expense and Other Assets Accounts payable Increase (Decrease) in Accounts Payable Accrued expenses, income taxes, and other Increase (Decrease) in Accrued Liabilities and Other Operating Liabilities Net cash used in operating activities Net Cash Provided by (Used in) Operating Activities Cash flows from investing activities: Proceeds from Investing Activities [Abstract] Purchases of property and equipment Payments to Acquire Property, Plant, and Equipment Purchases of intangible assets Payments to Acquire Intangible Assets Purchases of marketable securities Payments to Acquire Marketable Securities Marketable securities maturities / sales Proceeds from Sale and Maturity of Marketable Securities Net cash provided by (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 issuances of Series C preferred and common stock, net of issuance costs Proceeds from Issuance or Sale of Equity Proceeds from the issuance of short-term debt, net of issuance costs Proceeds from (Repayments of) Short-term Debt Principal repayments of short-term debt Repayments of Short-term Debt Repayment of litigation settlement note payable, including interest Payments for Legal Settlements Borrowings on revolving credit facility Proceeds from Lines of Credit Principal payments under capital lease obligations Repayments of Debt and Capital Lease Obligations Taxes paid on vested restricted stock units net of proceeds from stock option exercises and ESPP Proceeds From Stock Option Exercises And Espp Net Of Taxes Paid On Vested Restricted Stock Units Proceeds From Stock Option Exercises And ESPP Net Of Taxes Paid On Vested Restricted Stock Units 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 during the year for: Cash Paid During Year [Abstract] Cash paid during the year. Interest Interest Paid, Net Income taxes Income Taxes Paid, Net Supplemental disclosures of non-cash activities: Cash Flow Non Cash Investing Activities Disclosure [Abstract] Cash flow non cash investing activities disclosure. Building rent incentives to fund leasehold improvements Building Rent Incentives To Fund Leasehold Improvements Building rent incentives to fund leasehold improvements. Issuance of common stock for litigation settlement Stock Issued Initial fair value of warrant liability recorded upon issuance of Series C preferred and common stock Marketable Equity Securities Received In Settlement Of Note Receivable Marketable equity securities received in settlement of note receivable. Issuance of common stock for conversion of Series C preferred shares Conversion of Stock, Amount Issued 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] Developed technologies Developed Technology Rights [Member] Trade name Trade Names [Member] Other Other Intangible Assets [Member] Finite-Lived Intangible Assets [Line Items] Finite-Lived Intangible Assets [Line Items] Gross Finite-Lived Intangible Assets, Gross Accumulated Amortization Finite-Lived Intangible Assets, Accumulated Amortization Accumulated Impairment Intangible Assets Impaired Accumulated Impairment Loss Intangible assets impaired accumulated impairment loss. Net Finite-Lived Intangible Assets, Net Earnings Per Share [Abstract] Earnings Per Share Earnings Per Share [Text Block] Schedule of Available-for-sale Securities [Table] Schedule of Available-for-sale Securities [Table] Range [Axis] Range [Axis] Range [Domain] Range [Domain] Minimum Minimum [Member] Maximum Maximum [Member] Investment Type [Axis] Investment Type [Axis] Investments [Domain] Investments [Domain] Short-term marketable securities Short Term Marketable Securities [Member] Short term marketable securities member. Long-term marketable securities Long Term Marketable Securities [Member] Long term marketable securities. Schedule of Available-for-sale Securities [Line Items] Schedule of Available-for-sale Securities [Line Items] Long Term Investments Maturity Period Long Term Investments Maturity Period Long term investment maturity period. Maturity in Years Marketable Securities Maturity In Years Marketable securities maturity in years. Amortized Cost Available-for-sale Securities, Amortized Cost Basis Gross Unrealized Gains Available-for-sale Securities, Accumulated Gross Unrealized Gain, Before Tax Available-for-sale Securities, Accumulated Gross Unrealized Gain, Before Tax Gross Unrealized Losses Available-for-sale Securities, Accumulated Gross Unrealized Loss, Before Tax Available-for-sale Securities, Accumulated Gross Unrealized Loss, Before Tax Estimated Fair Value Available-for-sale Securities Fair Value Measurement of Assets and Liabilities Fair Value, Measurement Inputs, Disclosure [Text Block] Equity [Abstract] Summary of Change to Fair Value of Warrant Schedule of Stockholders' Equity Note, Warrants or Rights [Table Text Block] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Restricted Stock Restricted Stock [Member] 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, Non-Option Equity Instruments, Outstanding [Roll Forward] Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward] Non-vested at December 31, 2013 Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number Granted Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period Vested Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period Forfeited Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period Non-vested at December 31, 2014 Stock options outstanding under the 2009 Omnibus Incentive Compensation Plan and previous plans Employee Stock Option [Member] Restricted stock units Restricted Stock Units (RSUs) [Member] Shares available under the Employee Stock Purchase Plan Employee Stock Purchase Plans [Member] Employee stock purchase plans. Title of Individual [Axis] Title of Individual [Axis] Relationship to Entity [Domain] Relationship to Entity [Domain] Chief Executive Officer Chief Executive Officer [Member] New Hire New Hire [Member] New hire. Number of shares of common stock issued upon the exercise of stock options Stock Options Maximum Shares Available For Grant Stock options maximum shares available for grant. Total fair value of option awards recognized as expense Duration of the options granted Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period Rate of options exercisable after one year Stock Options Year One Vesting Rate Stock options year one vesting rate. Options granted vesting period Share Based Compensation Arrangement By Share Based Payment Award Award Vesting Period After Year One Period, after year 1, which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Total intrinsic value of options exercised Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value Total unrecognized share-based compensation cost Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized Expected recognition period Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition Weighted average fair value of option awards granted per share Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value Number of RSUs awarded to employees Range of RSUs price per unit at fair value Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value RSUs (restricted stock units) vesting rights percentage Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage Aggregate fair value of awards Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value Unrecognized compensation expense related to non-vested RSUs Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Share-based Awards Other than Options Percentage of lower limit value of common stock Share-based Compensation Arrangement by Share-based Payment Award, Purchase Price of Common Stock, Percent Maximum limit of payroll deductions (percent) Deferred Compensation Arrangement with Individual, Cash Awards Granted, Percentage Number of shares issue that the ESPP authorizes for purchase by eligible employees Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized Number of shares issued under the ESPP Employee Stock Ownership Plan (ESOP), Shares Contributed to ESOP Amount received in cash through employee withholdings Proceeds from Stock Plans Total fair value of awards recognized as expenses Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested in Period, Fair Value Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward] Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward] Unrecognized Tax Benefits, Beginning Balance Unrecognized Tax Benefits Increases related to current and prior year tax positions Unrecognized Tax Benefits, Increase Resulting from Current Period Tax Positions Settlements and lapses in statutes of limitations Unrecognized Tax Benefits, Reduction Resulting from Lapse of Applicable Statute of Limitations Unrecognized Tax Benefits, Ending Balance Weighted-average options RSUs, and ESPP shares outstanding (shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Acquired software licenses Licensing Agreements [Member] Intangible assets Finite-Lived Intangible Assets [Member] Purchased intangible assets net Intangible assets accumulated amortization Impairment loss Amortization expense Amortization of Intangible Assets Weighted average remaining useful life of long-lived intangible assets Acquired Finite-lived Intangible Assets, Weighted Average Useful Life Schedule of Stock by Class [Table] Schedule of Stock by Class [Table] Common stock warrants outstanding Warrant [Member] Scenario, Plan Scenario, Plan [Member] Class of Stock [Axis] Class of Stock [Axis] Class of Stock [Domain] Class of Stock [Domain] Series C Preferred Stock Series C Preferred Stock [Member] Series C Convertible Preferred Stock Convertible Preferred Stock [Member] Plan Name [Axis] Plan Name [Axis] Plan Name [Domain] Plan Name [Domain] 2009 Omnibus Incentive Compensation Plan Two Thousand Nine Omnibus Incentive Compensation Plan [Member] Two Thousand Nine Omnibus Incentive Compensation Plan [Member] 2000 Stock Compensation Plan Two Thousand Stock Compensation Plan [Member] Two Thousand Stock Compensation Plan [Member] Changes In Equity And Comprehensive Income Line Items [Line Items] Changes In Equity And Comprehensive Income Line Items [Line Items] Changes In Equity And Comprehensive Income Line Items [Line Items] Number of shares sold Common stock shares issued at par value (per share) Warrants to purchase common stock sold (shares) Class of Warrant or Right, Number of Securities Called by Warrants or Rights Exercise price per share Class of Warrant or Right, Exercise Price of Warrants or Rights Convertible preferred stock par value per share Temporary Equity, Par or Stated Value Per Share Number of shares sold, Per share price Shares Issued, Price Per Share Unreserved shares previously approved for issuance Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Forfeitures Common stock outstanding exercise percentage Reclassification of warrant liability to equity Convertible Preferred Stock, Shares Issued upon Conversion Convertible Preferred Stock, Shares Issued upon Conversion Expense on fair value warrants Fair Value Adjustment of Warrants Common stock shares reserved for issuance Common Stock, Capital Shares Reserved for Future Issuance Beneficial conversion feature Preferred Stock, Liquidation Preference, Value Summary of Marketable Securities Available-for-Sale Marketable Securities [Table Text Block] Summary of Inventories Schedule of Inventory, Current [Table Text Block] Summary of Property and Equipment Property, Plant and Equipment [Table Text Block] Summary of Accrued Expenses Schedule of Accrued Liabilities [Table Text Block] Summary of Accrued Warranty Obligations Schedule of Product Warranty Liability [Table Text Block] Summary of Share-Based Compensation Expense Schedule of Share-based Compensation, Activity [Table Text Block] Summary of per Share Fair Values of Stock Options Granted under 2009 Plan and Rights Granted under ESPP Schedule of Share-based Payment Award, Employee Stock Purchase Plan, Valuation Assumptions [Table Text Block] Summary of Stock Option Activity Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block] Summary of Restricted Stock Unit Activity Schedule of Share-based Compensation, Restricted Stock Units Award Activity [Table Text Block] Cost of net revenues General and administrative expenses Operating Expense [Member] Total amortization expense Amortization Expense [Member] Amortization Expense [Member] Amortization of purchased intangible assets 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] Employment Contract Costs Employee Severance [Member] Facility Exit Related Costs Facility Closing [Member] Share-based Compensation Costs Special Termination Benefits [Member] Restructuring Plan [Axis] Restructuring Plan [Axis] Restructuring Plan [Domain] Restructuring Plan [Domain] 2013 Initiatives Two Thousand Thirteen Restructuring [Member] Two thousand thirteen restructuring. 2014 Initiatives Two Thousand Fourteen Restructuring [Member] Two Thousand Fourteen Restructuring [Member] Restructuring Cost and Reserve [Line Items] Restructuring Cost and Reserve [Line Items] Reduction in number of employees after restructuring Restructuring and Related Cost, Number of Positions Eliminated Restructuring charges Restructuring Charges Restructuring costs to date Restructuring and Related Cost, Cost Incurred to Date Restructuring Restructuring Reserve, Current Restructuring Reserve, Noncurrent Restructuring Reserve, Noncurrent Document And Entity Information [Abstract] Document and entity information. Document Type Document Type Amendment Flag Amendment Flag Document Period End Date Document Period End Date Document Fiscal Year Focus Document Fiscal Year Focus Document Fiscal Period Focus Document Fiscal Period Focus Trading Symbol Trading Symbol Entity Registrant Name Entity Registrant Name Entity Central Index Key Entity Central Index Key Current Fiscal Year End Date Current Fiscal Year End Date Entity Well-known Seasoned Issuer Entity Well-known Seasoned Issuer Entity Current Reporting Status Entity Current Reporting Status Entity Voluntary Filers Entity Voluntary Filers Entity Filer Category Entity Filer Category Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Entity Public Float Entity Public Float Class of Warrant or Right [Table] Class of Warrant or Right [Table] Fair Value Hierarchy [Domain] Level 3 Fair Value, Inputs, Level 3 [Member] Common Stock Warrants [Line Items] Common Stock Warrants [Line Items] Common Stock Warrants [Line Items] Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward] Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward] Balance at September 8, 2014 (Transaction Date) Warrants and Rights Outstanding Change in fair value of warrant liability and fair value of beneficial conversion feature on convertible Series C preferred shares Reclassification to additional paid-in-capital Ending balance at December 31, 2014 Accounting Policies [Abstract] Basis of Presentation Basis of Accounting, Policy [Policy Text Block] Principles of Consolidation Consolidation, Policy [Policy Text Block] Use of Estimates Use of Estimates, Policy [Policy Text Block] Cash and Cash Equivalents Cash and Cash Equivalents, Policy [Policy Text Block] Allowance for Doubtful Accounts Receivable Trade and Other Accounts Receivable, Policy [Policy Text Block] Marketable Securities Marketable Securities, Policy [Policy Text Block] Inventories and Provision for Excess and Obsolete Inventory Inventory, Policy [Policy Text Block] Property and Equipment Property, Plant and Equipment, Policy [Policy Text Block] Intangible Assets Goodwill and Intangible Assets, Intangible Assets, Policy [Policy Text Block] Long-Lived Assets Impairment or Disposal of Long-Lived Assets, Policy [Policy Text Block] Goodwill Goodwill and Intangible Assets, Goodwill, Policy [Policy Text Block] Contingent Consideration Contingent Consideration Policy [Text Block] Disclosure of accounting policy for contingent consideration. Revenue Recognition Revenue Recognition, Policy [Policy Text Block] Research and Development Costs Research and Development Expense, Policy [Policy Text Block] Warranty Costs Standard Product Warranty, Policy [Policy Text Block] Income Taxes Income Tax, Policy [Policy Text Block] Litigation Litigation Policy [Policy Text Block] Disclosure of accounting policy for litigation. Share-Based Compensation Compensation Related Costs, Policy [Policy Text Block] Computation of Net Income (Loss) Per Share Earnings Per Share, Policy [Policy Text Block] Fair Value of Financial Instruments Fair Value of Financial Instruments, Policy [Policy Text Block] Comprehensive Loss Comprehensive Income, Policy [Policy Text Block] Fair Value Measurement Fair Value Measurement, Policy [Policy Text Block] Segment Information Segment Reporting, Policy [Policy Text Block] Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] Stock Options Outstanding Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract] Options outstanding December 31, 2013 Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number Granted Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross Exercised Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period Cancelled Share-based Compensation Arrangement by Share-based Payment Award, Options, Expirations in Period Balance December 31, 2014 Options Exercisable, December 31, 2014 Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number Weighted Average Exercise Price Per Option Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period, Weighted Average Exercise Price [Abstract] Options outstanding December 31, 2013 Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price Granted Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price Exercised Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price Cancelled Share-based Compensation Arrangements by Share-based Payment Award, Options, Expirations in Period, Weighted Average Exercise Price Balance December 31, 2014 Options Exercisable, December 31, 2014 Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price Weighted Average Remaining Contractual Term (Years), Options outstanding Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term Weighted Average Remaining Contractual Term (Years), Options Exercisable Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term Aggregate Intrinsic Value, Options outstanding Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value Aggregate Intrinsic Value, Options Exercisable Quarterly Financial Information Disclosure [Abstract] Quarterly Financial Information (Unaudited) Quarterly Financial Information [Text Block] Stock Incentive and Employee Stock Purchase Plans Disclosure of Compensation Related Costs, Share-based Payments [Text Block] Stockholders' Equity Stockholders' Equity Note Disclosure [Text Block] Retirement Savings Plan Pension and Other Postretirement Benefits Disclosure [Text Block] Property, Plant and Equipment [Table] Property, Plant and Equipment [Table] Property, Plant and Equipment, Type [Axis] Property, Plant and Equipment, Type [Axis] Property, Plant and Equipment, Type [Domain] Property, Plant and Equipment, Type [Domain] Test equipment Equipment [Member] Computer equipment and purchased software Computer Equipment [Member] Product tooling Other Machinery and Equipment [Member] Furniture and fixtures Furniture and Fixtures [Member] Leasehold improvements Leasehold Improvements [Member] Property, Plant and Equipment [Line Items] Property, Plant and Equipment [Line Items] Property and equipment, Gross Property, Plant and Equipment, Gross Less—accumulated depreciation and amortization Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Property and equipment, Net Option Indexed to Issuer's Equity [Axis] Option Indexed to Issuer's Equity [Axis] Option Indexed to Issuer's Equity, Type [Domain] Option Indexed to Issuer's Equity, Type [Domain] Employoee Stock Options Employee Stock Purchase Rights Employee Stock Purchase Plan [Member] Employee stock purchase plan. Expected dividend yield rate Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate Risk-free interest rate: Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate Volatility rate Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate Expected term (in years) Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term Income Statement [Abstract] Cost of net revenues Cost of Revenue Gross profit Gross Profit Operating costs and expenses: Operating Costs and Expenses [Abstract] Research and development Research and Development Expense Sales and marketing Selling and Marketing Expense General and administrative General and Administrative Expense Goodwill and intangible assets impairment Shareholder litigation loss Contingent Loss For Litigation Contingent Loss For Litigation Total operating costs and expenses Operating Expenses Operating loss Other income (expense): Other Nonoperating Income (Expense) [Abstract] Change in fair value of warrant liability Interest income (expense), net Interest Income (Expense), Nonoperating, Net Other expense, net Other Nonoperating Income (Expense) Loss before income taxes Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest Income tax provision Net loss Net Income (Loss) Attributable to Parent Before Beneficial Conversion Net Income (Loss) Attributable to Parent Before Beneficial Conversion Recognition of beneficial conversion feature Recognition of Beneficial Conversion Feature Recognition of Beneficial Conversion Feature Net loss Net loss per share: Earnings Per Share, Basic and Diluted [Abstract] Basic and diluted net loss per share (dollars per share) Earnings Per Share, Basic and Diluted Weighted average shares used in computation of basic and diluted net loss per share attributable to common shareholders: Weighted Average Number of Shares Outstanding, Diluted [Abstract] Weighted-average common shares outstanding (in shares) Weighted Average Number of Shares Outstanding, Basic and Diluted Nature Of Business And Significant Accounting Policies [Table] Nature Of Business And Significant Accounting Policies [Table] Nature of business and significant accounting policies. Nature Of Business And Significant Accounting Policies [Line Items] Nature Of Business And Significant Accounting Policies [Line Items] Nature of business and significant accounting policies. Net Income (Loss) Attributable to Parent Before Beneficial Conversion Net loss Cash, cash equivalents and short-term marketable securities Cash, Cash Equivalents, and Short-term Investments Working capital Working Capital Working Capital Maturity period of cash and cash equivalents Maturity Period Of Highly Liquid Investments Maximum Maturity period of highly liquid investments maximum. Maturity period of marketable securities Marketable Securities Highly Liquid Debt Investments Maturity Period Marketable securities highly liquid debt investments maturity period. Property and equipment useful lives Property, Plant and Equipment, Useful Life Period of amortization Finite-Lived Intangible Asset, Useful Life Period of warranty Product Warranty Periods Product Warranty Periods Recognized income tax position (percent) Uncertain Tax Position Recognition Threshold Uncertain tax position recognition threshold. Schedule of Net Revenues, Operating Income (Loss) and Identifiable Assets of Segments Schedule of Segment Reporting Information, by Segment [Table Text Block] Schedule of Geographic Concentration of Assets Schedule of Disclosure on Geographic Areas, Long-Lived Assets in Individual Foreign Countries by Country [Table Text Block] Schedule of Geographic Concentration of Net Revenues Schedule of Revenue from External Customers Attributed to Foreign Countries by Geographic Area [Table Text Block] Schedule of Earnings Per Share, Basic and Diluted Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Class of Warrant or Right [Axis] Class of Warrant or Right [Axis] Class of Warrant or Right [Domain] Class of Warrant or Right [Domain] Restricted stock units outstanding Future grants of awards under the 2009 Omnibus Incentive Compensation Plan Future Grants Of Award [Member] Future grants of award. Total shares of common stock reserved for issuance Valuation and Qualifying Accounts [Abstract] Schedule II - Valuation and Qualifying Accounts Schedule of Valuation and Qualifying Accounts Disclosure [Text Block] Current: Current Income Tax Expense (Benefit), Continuing Operations [Abstract] Federal Current Federal Tax Expense (Benefit) State Current State and Local Tax Expense (Benefit) Foreign Current Foreign Tax Expense (Benefit) Total Current Current Income Tax Expense (Benefit) Deferred: Deferred Income Tax Expense (Benefit), Continuing Operations [Abstract] Federal Deferred Federal Income Tax Expense (Benefit) State Deferred State and Local Income Tax Expense (Benefit) Foreign Deferred Foreign Income Tax Expense (Benefit) Total Deferred Deferred Income Tax Expense (Benefit) Numerator Denominator Earnings Per Share, Basic and Diluted, Other Disclosures [Abstract] Debt Disclosure [Abstract] Schedule of Long-term Debt Instruments [Table] Schedule of Long-term Debt Instruments [Table] Weighted Average Weighted Average [Member] Debt Instrument [Line Items] Debt Instrument [Line Items] Term of debt instrument Maximum amount of credit facility Margin on LIBOR rate Debt Instrument, Basis Spread on Variable Rate Outstanding borrowings under the credit facility Debt Instrument, Interest Rate, Effective Percentage Debt Instrument, Interest Rate, Effective Percentage 2015 Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months 2016 Finite-Lived Intangible Assets, Amortization Expense, Year Two Securities Purchase Agreement Securities Purchase Agreement [Text Block] Securities Purchase Agreement [Text Block] Statement of Comprehensive Income [Abstract] Unrealized gain (loss) on cash equivalents and marketable securities, net of tax Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Net of Tax Total comprehensive loss Comprehensive Income (Loss), Net of Tax, Attributable to Parent Schedule of Amortizable Purchased Intangible Assets from Acquisition Schedule of Finite-Lived Intangible Assets [Table Text Block] Summary of Amortization Expenses of Purchased Intangible Assets Purchased Intangible Asset Amortization Expense Classification Table [Text Block] Purchased intangible asset amortization expense classification. Schedule of Amortization Expense of Purchased Intangible Assets Expected to be Recognized Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block] Domestic Income (Loss) from Continuing Operations before Income Taxes, Domestic Foreign Income (Loss) from Continuing Operations before Income Taxes, Foreign Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Domain] Concentration Risk Benchmark [Domain] Net Revenues Sales Revenue, Net [Member] Accounts Receivable Accounts Receivable [Member] Concentration Risk Type [Axis] Concentration Risk Type [Axis] Concentration Risk Type [Domain] Concentration Risk Type [Domain] Customer Concentration Customer Concentration Risk [Member] Customer [Axis] Customer [Axis] Customer [Domain] Customer [Domain] Customer One Customer One [Member] Customer one. Customer Two Customer Two [Member] Customer two. Customer Three Customer Three [Member] Customer three. Concentration percentage Concentration Risk, Percentage Geographic Concentration Geographic Concentration Risk [Member] United States and Canada United States And Canada [Member] United States and Canada. Latin America Latin America [Member] Europe, Middle East, Africa and other EMEA [Member] Asia and Australia Asia And Australia [Member] Asia And Australia [Member] Summary of Minimum Future Lease Payments under Non-Cancelable Operating Leases Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block] Foreign currency exchange forward contracts outstanding Foreign Currency Exchange Forward Contracts Outstanding Foreign currency exchange forward contracts outstanding. Foreign currency losses on foreign currency denominated transactions Foreign Currency Transaction Gain (Loss), before Tax Preferred stock, shares issued Preferred Stock, Shares Issued Restructuring Reserve [Roll Forward] Restructuring Reserve [Roll Forward] Balance at December 31, 2013 Restructuring Reserve Accruals Additions To Restructuring Reserve Additions during the period to the restructuring reserve. Payments Payments for Restructuring Share-based compensation Restructuring Charges For Shared Based Compensation Acceleration For Termination Of Chief Executive Officer Restructuring Charges For Shared Based Compensation Acceleration For Termination Of Chief Executive Officer Balance at December 31, 2014 Valuation and Qualifying Accounts Disclosure [Table] Valuation and Qualifying Accounts Disclosure [Table] Valuation Allowances and Reserves Type [Axis] Valuation Allowances and Reserves Type [Axis] Valuation Allowances and Reserves [Domain] Valuation Allowances and Reserves [Domain] Allowance for Doubtful Accounts: Allowance for Doubtful Accounts [Member] Warranty: Warranty Reserves [Member] Deferred Tax Asset Valuation Allowance: Valuation Allowance of Deferred Tax Assets [Member] Sales Returns and Allowances: Allowance for Sales Returns [Member] Valuation and Qualifying Accounts Disclosure [Line Items] Valuation and Qualifying Accounts Disclosure [Line Items] Movement in Valuation Allowances and Reserves [Roll Forward] Movement in Valuation Allowances and Reserves [Roll Forward] Balance At Beginning of Year Valuation Allowances and Reserves, Balance Additions Charged to Operations Valuation Allowances and Reserves, Charged to Cost and Expense Deductions From Reserves Valuation Allowances and Reserves, Deductions Balance At End of Year Revolving Credit Facility Debt Disclosure [Text Block] Royalties Accrued Royalties, Current Payroll and related expenses Employee-related Liabilities, Current Product warranty Market development funds and price protection Market Development Fund And Price Protection Carrying value as of the balance sheet date of obligations incurred through that date and payable for market development funds and price protection. Professional fees Accrued Professional Fees, Current Deferred revenue Deferred Revenue Other Other Accrued Liabilities, Current Accrued expenses, Total Summary of Unaudited Quarterly Results of Operations Schedule of Quarterly Financial Information [Table Text Block] Net unrealized gains (losses) Availableforsale Securities Gross Unrealized Gain Loss Accumulated In Aoci Net amount of accumulated unrealized gains (losses) on investments in available-for-sale securities that are recognized in Accumulated Other Comprehensive Income (AOCI). Property and equipment Impairment of Long-Lived Assets Held-for-use Depreciation and amortization expense Depreciation Gross profit Net loss attributable to common shareholders Earnings Per Share, Basic ($ per share) Earnings Per Share, Basic Earnings Per Share, Diluted ($ per share) Earnings Per Share, Diluted Basic and diluted net loss per common share (dollars per share) Financial Statement Details Supplemental Balance Sheet Disclosures [Text Block] Nature of Business and Significant Accounting Policies Organization, Consolidation and Presentation of Financial Statements Disclosure and Significant Accounting Policies [Text Block] Summary of Common Shares Reserved for Future Issuance Summary Of Common Shares Reserved For Future Issuance Table [Text Block] Summary of common shares reserved for future issuance.