Accrued litigation settlements Increase (Decrease) in Accrued Litigation Settlements The net change during the reporting period in the aggregate amount of ligation settlements. REVENUE RECOGNITION REVENUE RECOGNITION Revenue Recognition [Text Block] This element represents the principles adopted by the entity for recognition of revenue for various products and services. Document and Entity Information Adjustments to Additional Paid in Capital, Forfeited Stock Options, Requisite Service Period Recognition Settlement payment for forfeited stock options Represents the amount of recognized forfeited stock options during the period. CANCELLATION AND RETIREMENT OF TREASURY STOCK Amendment Description Amendment Flag Current Fiscal Year End Date Document Period End Date BASIS OF PRESENTATION Entity Well-known Seasoned Issuer Entity Voluntary Filers Entity Current Reporting Status Entity Filer Category Entity Public Float Entity Registrant Name Entity Central Index Key Entity Common Stock, Shares Outstanding Accounts Payable and Accrued Liabilities Disclosure [Text Block] ACCRUED EXPENSES Document Fiscal Year Focus Document Fiscal Period Focus Document Type Accounts Receivable, Net, Current Accounts receivable, net of allowance for doubtful accounts of $0 at June 29, 2012 and December 31, 2011 Accounts Payable, Current Accounts payable Accrued Liabilities, Current Accrued expenses Total Accumulated Other Comprehensive Income (Loss) Accumulated Other Comprehensive Income (Loss) [Member] Accumulated other comprehensive income Accumulated Other Comprehensive Income (Loss), Net of Tax Additional paid-in capital Additional Paid in Capital, Common Stock Additional Paid-in Capital Additional Paid-in Capital [Member] Adjustments to reconcile net loss to cash flows used in operating activities: Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Stock-based compensation expense Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition Adjustments Related to Tax Withholding for Share-based Compensation Payment of tax withholding obligations related to net share settlements of restricted stock awards Allowance for Doubtful Accounts Receivable, Current Accounts receivable, allowance for doubtful accounts (in dollars) Amortization of Intangible Assets Amortization of intangible assets Amortization expense related to intangible assets Assets, Current [Abstract] Current assets: Assets [Abstract] Assets Assets, Current Total current assets Assets Total assets Capital Lease Obligations Incurred Property and equipment acquired under operating lease Capital Expenditures Incurred but Not yet Paid Capital expenditures incurred, but not yet paid Cash and Cash Equivalents, at Carrying Value Cash and cash equivalents Cash and cash equivalents, beginning of year Cash and cash equivalents, end of period Supplemental disclosure of non-cash investing activities: Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract] Commitments and Contingencies Disclosure [Text Block] COMMITMENTS AND CONTINGENCIES COMMITMENTS AND CONTINGENCIES Commitments and contingencies (Note 13) Commitments and Contingencies. Common Stock Common Stock [Member] Common stock, shares outstanding Common Stock, Shares, Outstanding Balance (in shares) Balance (in shares) Common stock, $0.001 par value; 600,000,000 shares authorized; 279,982,468 shares issued and outstanding at June 29, 2012 and 279,318,396 shares issued and outstanding at December 31, 2011 Common Stock, Value, Issued Common stock, shares issued Common Stock, Shares, Issued Common stock, par value (in dollars per share) Common Stock, Par or Stated Value Per Share Common stock, shares authorized Common Stock, Shares Authorized EMPLOYEE DEFINED CONTRIBUTION PLAN COMPREHENSIVE INCOME (LOSS) Comprehensive loss Comprehensive Income (Loss), Net of Tax, Attributable to Parent Comprehensive Income (Loss) Note [Text Block] COMPREHENSIVE INCOME (LOSS) Comprehensive Loss Comprehensive Income [Member] Concentration Risk Disclosure [Text Block] MAJOR CUSTOMERS Cost of revenue: Cost of Revenue [Abstract] Product Cost of Goods Sold Total cost of revenue Cost of Revenue Service Cost of Services LONG-TERM LIABILITIES Debt and Capital Leases Disclosures [Text Block] LONG-TERM LIABILITIES Deferred income taxes Deferred Income Tax Expense (Benefit) Deferred Tax Assets, Net of Valuation Allowance, Current Deferred income taxes Deferred revenue Deferred Revenue, Noncurrent Current portion of deferred revenue Deferred Revenue, Current Deferred income taxes Deferred Tax Assets, Net of Valuation Allowance, Noncurrent Disclosure of Compensation Related Costs, Share-based Payments [Text Block] STOCK-BASED COMPENSATION PLANS STOCK-BASED COMPENSATION PLANS Diluted (in dollars per share) Earnings Per Share, Diluted Basic (in dollars per share) Earnings Per Share, Basic Earnings Per Share [Text Block] LOSS PER SHARE Loss per share: LOSS PER SHARE Effect of Exchange Rate on Cash and Cash Equivalents, Continuing Operations Effect of exchange rate changes on cash and cash equivalents Equity Component [Domain] FOREIGN CURRENCY TRANSLATION Foreign Currency Disclosure [Text Block] FOREIGN CURRENCY TRANSLATION Gain (Loss) on Sale of Property Plant Equipment Loss on disposal of property and equipment General and administrative General and Administrative Expense Goodwill Goodwill Goodwill and Intangible Assets Disclosure [Text Block] INTANGIBLE ASSETS AND GOODWILL INTANGIBLE ASSETS AND GOODWILL Gross profit Gross Profit Condensed Consolidated Statements of Operations Income Tax Disclosure [Text Block] INCOME TAXES INCOME TAXES Loss before income taxes Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest Income tax (provision) benefit Income Tax Expense (Benefit) Income Taxes Paid Income taxes paid Accounts payable Increase (Decrease) in Accounts Payable Accrued expenses and other long-term liabilities Increase (Decrease) in Accrued Liabilities Deferred revenue Increase (Decrease) in Deferred Revenue Increase (Decrease) in Accounts Receivable Accounts receivable Changes in operating assets and liabilities: Increase (Decrease) in Operating Capital [Abstract] Increase (Decrease) in Other Operating Assets Other operating assets Increase (Decrease) in Inventories Inventory Increase in restricted cash Increase (Decrease) in Restricted Cash Increase (Decrease) in Stockholders' Equity Increase (Decrease) in Stockholders' Equity [Roll Forward] Intangible Assets, Net (Excluding Goodwill) Intangible assets, net Net carrying value Interest Expense Interest expense Interest income, net Interest Income (Expense), Nonoperating, Net Interest Paid Interest paid Inventory Disclosure [Text Block] INVENTORY Inventory, Net Inventory Less current portion INVENTORY Total current liabilities Liabilities, Current Liabilities, Current [Abstract] Current liabilities: Total liabilities Liabilities Liabilities and Equity [Abstract] Liabilities and stockholders' equity Total liabilities and stockholders' equity Liabilities and Equity ACCOUNTS RECEIVABLE, NET Loans, Notes, Trade and Other Receivables Disclosure [Text Block] Long-term Investments Investments Investments, fair value Investments, fair value Marketable Securities, Current Marketable securities Marketable securities, fair value Marketable securities, fair value Nature of Operations [Text Block] NATURE OF THE BUSINESS Cash flows from financing activities: Net Cash Provided by (Used in) Financing Activities, Continuing Operations [Abstract] Net cash used in operating activities Net Cash Provided by (Used in) Operating Activities, Continuing Operations Net Cash Provided by (Used in) Operating Activities, Continuing Operations [Abstract] Cash flows from operating activities: Net Cash Provided by (Used in) Continuing Operations Net increase in cash and cash equivalents Net Cash Provided by (Used in) Investing Activities, Continuing Operations Net cash provided by investing activities Net loss Net Income (Loss) Available to Common Stockholders, Basic Net loss Net Cash Provided by (Used in) Financing Activities, Continuing Operations Net cash provided by financing activities Cash flows from investing activities: Net Cash Provided by (Used in) Investing Activities, Continuing Operations [Abstract] Supplemental disclosure of non-cash financing activities: Noncash Investing and Financing Items [Abstract] Operating expenses: Operating Expenses [Abstract] Total operating expenses Operating Expenses Loss from operations Operating Income (Loss) NATURE OF THE BUSINESS Organization, Consolidation, Basis of Presentation, Business Description and Accounting Policies [Text Block] BASIS OF PRESENTATION Other Assets, Current Other current assets Other Assets, Noncurrent Other assets Current portion of long-term liabilities Other Liabilities, Current Other income, net Other Nonoperating Income (Expense) Long-term liabilities Other Liabilities, Noncurrent Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Portion Attributable to Parent Foreign currency translation adjustments Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax, Portion Attributable to Parent Unrealized (loss) gain on available-for-sale marketable securities, net of tax ACCRUED EXPENSES Payments to Acquire Property, Plant, and Equipment Purchases of property and equipment Payments to Acquire Intangible Assets Purchase of intangible assets Payments to Acquire Marketable Securities Purchases of marketable securities Pension and Other Postretirement Benefits Disclosure [Text Block] EMPLOYEE DEFINED CONTRIBUTION PLAN Preferred stock, $0.01 par value; 5,000,000 shares authorized, none issued and outstanding Preferred Stock, Value, Issued Preferred stock, shares authorized Preferred Stock, Shares Authorized Preferred stock, shares issued Preferred Stock, Shares Issued Preferred stock, par value (in dollars per share) Preferred Stock, Par or Stated Value Per Share Preferred stock, shares outstanding Preferred Stock, Shares Outstanding Proceeds from Issuance of Shares under Incentive and Share-based Compensation Plans, Excluding Stock Options Proceeds from sale of common stock in connection with employee stock purchase plan Proceeds from Income Tax Refunds Income tax refunds received Proceeds from Sale and Maturity of Marketable Securities Sale/maturities of marketable securities Proceeds from Stock Options Exercised Proceeds from exercise of stock options Cash received from the exercise of stock options (in dollars) PROPERTY AND EQUIPMENT Property, Plant and Equipment, Net Property and equipment, net Property, Plant and Equipment Disclosure [Text Block] PROPERTY AND EQUIPMENT Quarterly Financial Information [Text Block] QUARTERLY RESULTS (UNAUDITED) QUARTERLY RESULTS (UNAUDITED) ACCOUNTS RECEIVABLE, NET Related Party Transactions Disclosure [Text Block] RELATED PARTIES RELATED PARTIES Repayments of Long-term Capital Lease Obligations Principal payments of capital lease obligations Research and development Research and Development Expense Restricted Stock, Shares Issued Net of Shares for Tax Withholdings Shares of restricted stock returned to the Company under net share settlements to satisfy tax withholding obligations (in shares) Restricted Stock, Value, Shares Issued Net of Tax Withholdings Shares of restricted stock returned to the Company under net share settlements to satisfy tax withholding obligations Restructuring and Related Activities Disclosure [Text Block] RESTRUCTURING ACCRUAL Restructuring Restructuring Charges RESTRUCTURING ACCRUAL Accumulated deficit Retained Earnings (Accumulated Deficit) Accumulated Deficit Retained Earnings [Member] Total revenue Revenues Revenue: Revenues [Abstract] MAJOR CUSTOMERS Product Sales Revenue, Goods, Net Service Sales Revenue, Services, Net Scenario, Unspecified [Domain] GEOGRAPHIC INFORMATION Segment Reporting Disclosure [Text Block] GEOGRAPHIC INFORMATION Sales and marketing Selling and Marketing Expense Share-based Compensation Stock-based compensation Statement [Table] Scenario [Axis] Statement [Line Items] Statement Consolidated Statements of Stockholders' Equity and Comprehensive Loss Condensed Consolidated Statements of Cash Flows Equity Components [Axis] Condensed Consolidated Balance Sheets Stock Issued During Period, Shares, Period Increase (Decrease) Exercise of stock options Stock Issued During Period, Value, Stock Options Exercised Stock Issued During Period, Shares, Share-based Compensation, Net of Forfeitures Issuance of vested performance-based stock awards (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period Exercised (in shares) Issuance of common stock in connection with employee stock purchase plan Stock Issued During Period, Value, Employee Stock Purchase Plan Vesting of restricted stock Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures Vesting of restricted stock (in shares) Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures Issuance of common stock in connection with employee stock purchase plan (in shares) Stock Issued During Period, Shares, Employee Stock Purchase Plans Stockholders' equity: Stockholders' Equity Attributable to Parent [Abstract] Total stockholders' equity Stockholders' Equity Attributable to Parent Balance Balance STOCKHOLDER RIGHTS PLAN Stockholders' Equity Note Disclosure [Text Block] STOCKHOLDER RIGHTS PLAN Stockholders' Equity, Period Increase (Decrease) Supplemental disclosure of cash flow information: Supplemental Cash Flow Information [Abstract] Treasury stock, at cost; 2,296,910 common shares Treasury Stock, Value Treasury Stock, Shares Treasury stock, common shares Treasury Stock Treasury Stock [Member] Treasury Stock, Retired, Cost Method, Amount Cancellation and retirement of treasury stock Cancellation and retirement of treasury stock Treasury Stock [Text Block] CANCELLATION AND RETIREMENT OF TREASURY STOCK Cancellation and retirement of treasury stock (in shares) Treasury Stock, Shares, Retired Shares used to compute loss per share: Weighted Average Number of Shares Outstanding, Diluted [Abstract] Basic (in shares) Weighted Average Number of Shares Outstanding, Basic Weighted average shares outstanding - basic Diluted (in shares) Weighted Average Number of Shares Outstanding, Diluted Weighted average shares outstanding - diluted Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent [Abstract] Other comprehensive income (loss), net of tax: Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent Total Other comprehensive income (loss) Condensed Consolidated Statements of Comprehensive Loss Basis of Accounting, Policy [Policy Text Block] Basis of Presentation Consolidation, Policy [Policy Text Block] Principles of Consolidation Use of Estimates, Policy [Policy Text Block] Use of Estimates and Judgments Fair Value of Financial Instruments, Policy [Policy Text Block] Fair Value of Financial Instruments Segment Reporting, Policy [Policy Text Block] Operating segments Schedule of Weighted Average Number of Shares [Table Text Block] Schedule of calculations of shares used to compute basic and diluted earnings (loss) per share Weighted Average Number of Shares Outstanding Reconciliation [Abstract] Reconciliation of weighted average shares outstanding from basic to diluted Weighted Average Number Diluted Shares Outstanding Adjustment Potential dilutive common shares Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Common stock and unvested shares of restricted stock not included because their effect would have been antidilutive (in shares) Deferred Costs of Goods Sold, Net of Reserves Deferred cost of goods sold Carrying amount, net of valuation reserves and adjustments, as of the balance sheet date of deferred costs of goods sold. Inventory, Noncurrent Noncurrent portion (included in Other assets) Schedule of Accrued Liabilities [Table Text Block] Schedule of accrued expenses Other Accrued Liabilities, Current Other Schedule of Components of Foreign Currency Gains (Losses) [Table Text Block] Schedule of components of foreign currency gains (losses) Tabular disclosure of the components of foreign currency gains or losses. Foreign Currency Transaction Gain (Loss), before Tax Transaction gains (losses) Foreign Currency Remeasurement Gains (Losses) Remeasurement gains (losses) Represents the gains or losses arising on account of changes in foreign exchange rate used to remeasure amounts denominated in a currency other than the functional currency into the functional currency. Foreign Currency Gains (Losses) Foreign currency gains (losses), total Represents the total gains or losses related to foreign currency. Schedule of Revenue by Major Customers by Reporting Segments [Table Text Block] Schedule of customers contributing 10% or more of the revenue Qwest Communications International Inc [Member] Qwest Communications International, Inc. Represents Qwest Communications International, Inc., a major customer of the entity. Bahamas Telecommunications Company Limited [Member] Bahamas Telecom Represents Bahamas Telecommunications Company Ltd. (Bahamas Telecom), a major customer of the entity. Concentration Risk [Line Items] Revenue by geographic area and by customer MAJOR CUSTOMERS AT and T Inc. [Member] AT&T Represents AT&T Inc., a major customer of the entity. Major Customers [Axis] Name of Major Customer [Domain] Schedule of Segment Reporting Information, by Segment [Table] Geographical [Axis] Segment, Geographical [Domain] UNITED STATES United States JAPAN Japan Other Geographical Area [Member] Other A group of other countries not separately specified, about which segment information is provided by the entity. Schedule of Finite-Lived Intangible Assets [Table Text Block] Schedule of intangible assets Schedule of Finite Lived Intangible Assets Amortization Expense [Table Text Block] Schedule of amortization expense related to intangible assets Tabular disclosure of amortization expense related to finite lived intangible assets. Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block] Schedule of estimated future amortization expense for intangible assets Schedule of Goodwill [Table Text Block] Schedule of goodwill Schedule of Finite-Lived Intangible Assets [Table] Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets, Major Class Name [Domain] Developed Technology Rights [Member] Intellectual property Finite-Lived Intangible Assets [Line Items] Intangible Assets And Goodwill Finite-Lived Intangible Asset, Useful Life Useful life Finite-Lived Intangible Assets, Gross Cost Finite-Lived Intangible Assets, Accumulated Amortization Accumulated amortization Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract] Estimated future amortization expense for intangible assets Finite-Lived Intangible Assets, Amortization Expense, Remainder of Fiscal Year Remainder of 2012 Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months 2013 Finite-Lived Intangible Assets, Amortization Expense, Year Two 2014 Finite-Lived Intangible Assets, Net Total Goodwill, Gross Goodwill Goodwill, Impaired, Accumulated Impairment Loss Accumulated impairment losses Schedule of Cash Equivalents, Marketable Securities and Investments Reconciliation [Table Text Block] Schedule of amortized cost, gross unrealized gains and losses and fair value of marketable debt and equity securities and investments Tabular disclosure of the reconciliation of cash equivalents, marketable securities and investments from cost basis to fair value. Fair Value, Assets Measured on Recurring and Nonrecurring Basis [Table Text Block] Schedule of fair value of financial assets Investment Holdings [Table] US Government Agencies Debt Securities [Member] U.S. government agency notes Investment [Axis] Investment [Domain] Foreign Government Debt Securities [Member] Foreign government notes Corporate Debt Securities [Member] Corporate debt securities Commercial Paper [Member] Commercial paper Certificates of Deposit [Member] Certificates of deposit Range [Axis] Range [Domain] Maximum [Member] Maximum Less than Minimum [Member] Minimum Investment Holdings [Line Items] Amortized cost, gross unrealized gains and losses and fair value of marketable debt and equity securities and investments Cash Equivalents Amortized Cost Cash equivalents, amortized cost Represents the amortized cost of cash equivalents. Marketable Securities Amortized Cost Marketable securities, amortized cost This item represents the cost of debt and equity securities, which are categorized as marketable securities, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any. Marketable Securities Gross Unrealized Gains Marketable securities, unrealized gains This item represents the gross unrealized gains for securities, at a point in time, which are categorized as marketable securities. Marketable Securities Gross Unrealized Losses Marketable securities, unrealized losses This item represents the gross unrealized losses for securities, at a point in time, which are categorized as marketable securities. Long term Investments Amortized Cost Investments, amortized cost This item represents the cost of debt and equity securities, which are categorized as long-term investments, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any. Long term Investments Gross Unrealized Gains Investments, unrealized gains This item represents the gross unrealized gains for securities, at a point in time, which are categorized as long-term investments. Long term Investments Gross Unrealized Losses Investments, unrealized losses This item represents the gross unrealized losses for securities, at a point in time, which are categorized as long-term investments. Available for sale Securities Debt Maturity Period Considered to Classify as Investments Period considered to classify available-for-sale securities as investments Represents the period considered to classify available-for-sale debt securities as investments. Goodwill, Impaired, Accumulated Impairment Loss [Abstract] Changes in goodwill Fair Value Measurements, Recurring and Nonrecurring [Table] Major Types of Debt and Equity Securities [Axis] Major Types of Debt and Equity Securities [Domain] Fair Value, Hierarchy [Axis] Fair Value, Measurements, Fair Value Hierarchy [Domain] Estimate of Fair Value, Fair Value Disclosure [Member] Total carrying value Fair Value, Inputs, Level 1 [Member] Quoted prices in active markets (Level 1) Fair Value, Inputs, Level 2 [Member] Significant other observable inputs (Level 2) Fair Value, Inputs, Level 3 [Member] Significant unobservable inputs (Level 3) Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Cash and cash equivalents, Marketable securities and Investments Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block] Schedule of activity related to outstanding stock options Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] Schedule of assumptions used to estimate the fair value of options at the date of grant using the Black-Scholes option pricing model Schedule of Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Grant Date Intrinsic Value [Table Text Block] Schedule of additional information regarding stock options Schedule of Share-based Compensation Restricted Stock Activity [Table Text Block] Schedule of activity related to restricted stock awards Tabular disclosure of the number and weighted-average grant date fair value of restricted stock that were outstanding at the beginning and end of the year, and the number of restricted stock and restricted stock units that were granted, vested, or forfeited during the year. Schedule of Share based Compensation Performance Stock Awards Activity [Table Text Block] Schedule of activity related to performance stock awards Tabular disclosure of the number and weighted-average grant date fair value of performance stock awards that were outstanding at the beginning and end of the year, and the number of restricted stock and restricted stock units that were granted, vested, or forfeited during the year. Stock Options [Member] Stock options Restricted Stock [Member] Restricted stock awards Product Cost of Sales [Member] Product cost of revenue Represents the primary financial statement caption in which reported facts about product cost of sales have been included. Service Cost of Sales [Member] Service cost of revenue Represents the primary financial statement caption in which reported facts about service cost of sales have been included. Research and Development Expense [Member] Research and development Selling and Marketing Expense [Member] Sales and marketing General and Administrative Expense [Member] General and administrative Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Stock-based compensation Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] Number of shares Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number Outstanding at the beginning of the period (in shares) Outstanding at the end of the period (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross Granted (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures in Period Forfeited (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Expirations in Period Expired (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Number Vested or expected to vest at the end of the period (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Number Exercisable at the end of the period (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward] Weighted average exercise price Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price Outstanding at the beginning of the period (in dollars per share) Outstanding at the end of the period (in dollars per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price Granted (in dollars per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price Exercised (in dollars per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Forfeitures in Period, Weighted Average Exercise Price Forfeited (in dollars per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Expirations in Period, Weighted Average Exercise Price Expired (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Exercise Price Vested or expected to vest at the end of the period (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Weighted Average Exercise Price Exercisable at the end of the period (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract] Weighted average remaining contractual life (in years) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term Outstanding at the end of the period Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Remaining Contractual Term Vested or expected to vest at the end of the period Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Weighted Average Remaining Contractual Term Exercisable at the end of the period Share-based Compensation Arrangement by Share-based Payment Award, Additional General Disclosures [Abstract] Aggregate intrinsic value (in dollars) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value Outstanding at the end of the period (in dollars) Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Aggregate Intrinsic Value Vested or expected to vest at the end of the period (in dollars) Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Aggregate Intrinsic Value Exercisable at the end of the period (in dollars) Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract] Range of assumptions used in estimating fair value of options Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate Expected dividend yield (as a percent) Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Weighted Average Volatility Rate Weighted average volatility (as a percent) Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term Expected life Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value Weighted average grant date fair value of stock options granted (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Total Intrinsic Value Total intrinsic values of stock options exercised (in dollars) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] Change in unvested restricted stock awards Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number Unvested balance at the beginning of the period (in shares) Unvested balance at the end of the period (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period Granted (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period Vested (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period Forfeited (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward] Weighted average grant-date fair value Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value Unvested balance at the end of the period (in dollars per share) Unvested balance at end of the period(in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value Granted (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value Vested (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value Forfeited (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Total Fair Value Total fair value (in dollars) Share based Compensation Arrangement by Share based Payment Award, Equity Instruments Other than Options Nonvested, Number of Shares for which Performance Conditions Not Yet Established Stock awards not included in activity as the company has not yet established the performance conditions (in shares) Represents the stock awards that are not included in the activity because the entity has not yet established the performance conditions. Allocated Share-based Compensation Expense Stock-based compensation (in dollars) Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized Unrecognized stock-based compensation expense, net of expected forfeitures (in dollars) Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table Text Block] Schedule of stock-based compensation expenses which are included in condensed consolidated statement of operations Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Period for Recognition Period over which unrecognized compensation expense is expected to be recognized Employee-related Liabilities, Current Employee compensation and related costs Performance Shares [Member] Performance share awards Accounts Receivable [Member] Accounts receivable balance Customer Concentration Risk [Member] Customer Threshold for Disclosure, Percentage Threshold percentage Threshold percentage which the entity uses for disclosure. Number of Major Customers Number of major customers Represents the number of major customers of the entity. Geographic Concentration Risk [Member] Geographical area Number of Reportable Segments Number of reportable operating segments New Accounting Pronouncements, Policy [Policy Text Block] Recent Accounting Pronouncements Concentration Risk, Percentage Percentage of total revenue Concentration risk, percentage Concentration Risk [Table] Concentration Risk Type [Axis] Concentration Risk Type [Domain] Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Domain] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Award Type [Axis] Award Type [Domain] 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] Revenue Sales [Member] Other Asia Pacific Segment, Geographical, Groups of Countries, Group One [Member] Europe, Middle East and Africa Segment, Geographical, Groups of Countries, Group Two [Member] The aggregate expense recognized in the current period that allocates the cost of tangible assets to periods that benefit from use of the assets. Depreciation and amortization of property and equipment Depreciation and Amortization of Tangible Assets Financial Instruments Disclosure [Text Block] CASH EQUIVALENTS, MARKETABLE SECURITIES AND LONG-TERM INVESTMENTS Schedule of Inventory, Current [Table Text Block] Schedule of inventory Schedule of Revenue from External Customers and Long-Lived Assets, by Geographical Areas [Table Text Block] Summary of revenue by geographic area as a percentage of total revenue Cash Equivalents, at Carrying Value Cash equivalents, fair value Inventory, Finished Goods, Net of Reserves On-hand final assemblies and finished goods inventories Inventory Finished Goods and Deferred Cost of Goods Sold Gross inventory The aggregated amount of merchandise or goods held by the entity and readily available for future sale and deferred cost of goods sold. Deferred cost of goods sold includes inventory at the customer site and third party costs. This amount is net of valuation reserves and adjustments. Share-based Compensation [Abstract] Stock-Based Compensation Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate, Minimum Risk-free interest rates, minimum (as a percent) Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate, Maximum Risk-free interest rates, maximum (as a percent) CASH EQUIVALENTS, MARKETABLE SECURITIES AND LONG-TERM INVESTMENTS PROPOSED ACQUISITION OF NETWORK EQUIPMENT TECHNOLOGIES, INC. Proposed Business Combination Disclosure [Text Block] PROPOSED ACQUISITION OF NETWORK EQUIPMENT TECHNOLOGIES, INC. The entire disclosure for proposed acquisition approved by board of directors. Violations of Federal Securities Laws [Member] 2001 IPO Litigation Represents the information pertaining to violations of the federal securities laws in connection with the entity's initial public offering. COMMITMENTS AND CONTINGENCIES Loss Contingencies [Line Items] Loss Contingencies Number of Officers Against Whom Case Was Filed Number of officers against whom a case was filed Represents the number of officers against whom a case was filed by the purchaser of the entity's common stock. Loss Contingencies Number of Other Publicly Traded Companies Against Which Similar Class Action Cases Were Filed by Other Plaintiffs Number of other publicly traded companies against which similar class action cases were filed by other plaintiffs Represents the number of other publicly traded companies against which similar class action cases were filed by other plaintiffs. Network Equipment Technologies Inc [Member] NET Represents information pertaining to Network Equipment Technologies, Inc., the acquiree entity. PROPOSED ACQUISITION OF NETWORK EQUIPMENT TECHNOLOGIES, INC. Business Acquisition [Line Items] Business Acquisition Cost of Acquired Entity Purchase Price Per Share Purchase price per share (in dollars per share) Represents the purchase price per share of the acquired entity. Business Acquisition Cost of Acquired Entity Purchase Price Excluding Acquisition Related Costs Purchase price excluding acquisition-related costs Cost of the acquired entity, including the cash paid to shareholders of the acquired entity, fair value of debt and equity securities issued to shareholders of the acquired entity, the fair value of the liabilities assumed, but excluding acquisition-related costs. Available For Sale Securities Debt Maturity Period Considered to Classify as Marketable Securities Period considered to classify available-for-sale securities as marketable securities Represents the period considered to classify available-for-sale debt securities as marketable securities. Business Acquisition [Axis] Loss Contingency Nature [Axis] Business Acquisition, Acquiree [Domain] Loss Contingency, Nature [Domain] Loss Contingencies [Table] Schedule of Business Acquisitions, by Acquisition [Table] SUBSEQUENT EVENT SUBSEQUENT EVENT Subsequent Events [Text Block] Subsequent event Subsequent Event [Member] Subsequent event Subsequent Event [Line Items] Number of workforce reduction Restructuring and Related Cost, Expected Number of Positions Eliminated Restructuring charge Restructuring and Related Cost, Expected Cost Subsequent Event Type [Axis] Subsequent Event [Table] Subsequent Event Type [Domain]