Statement of Financial Position [Abstract] Statement [Table] Statement [Table] Statement, Scenario [Axis] Statement, Scenario [Axis] Scenario, Unspecified [Domain] Scenario, Unspecified [Domain] Class of Stock [Axis] Class of Stock [Axis] Class of Stock [Domain] Class of Stock [Domain] Statement [Line Items] Statement [Line Items] ASSETS Assets [Abstract] Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Short-term marketable securities Marketable Securities, Current Accounts receivable, net Accounts Receivable, Net, Current Inventory, net Inventory, Net Prepaid expenses and other current assets Prepaid Expense, Current Total current assets Assets, Current Long-term marketable securities Marketable Securities, Noncurrent Property and equipment, net Property, Plant and Equipment, Net Other assets, net Other Assets, Noncurrent Total assets Assets LIABILITIES AND SHAREHOLDERS’ EQUITY Liabilities and Stockholders' Equity [Abstract] Accounts payable Accounts Payable, Current Accrued liabilities and current portion of long-term liabilities Accrued Liabilities, Current Current portion of income taxes payable Accrued Income Taxes, Current Short-term line of credit Line of Credit, Current Debentures currently payable Convertible Subordinated Debt, Current Total current liabilities Liabilities, Current Long-term liabilities, net of current portion Accounts Payable and Accrued Liabilities, Noncurrent Income taxes payable, net of current portion Accrued Income Taxes, Noncurrent Total liabilities Liabilities Commitments and contingencies (Note 12) Commitments and Contingencies Shareholders’ equity: Stockholders' Equity Attributable to Parent [Abstract] Preferred stock Preferred Stock, Value, Issued Common stock Common Stock, Value, Issued Accumulated other comprehensive income (loss) Accumulated Other Comprehensive Income (Loss), Net of Tax Accumulated deficit Retained Earnings (Accumulated Deficit) Total shareholders’ equity Stockholders' Equity Attributable to Parent Total liabilities and shareholders’ equity Liabilities and Stockholders' Equity Restructuring Charges [Abstract] Restructuring and Related Activities Disclosure Restructuring and Related Activities Disclosure [Text Block] BALANCE SHEET COMPONENTS [Abstract] BALANCE SHEET COMPONENTS [Abstract] Balance sheet components Balance sheet components [Text Block] Balance sheet components [Text Block] INTEREST EXPENSE AND OTHER, NET [Abstract] INTEREST EXPENSE AND OTHER, NET [Abstract] Other Income and Other Expense Disclosure Other Income and Other Expense Disclosure [Text Block] Statement of Cash Flows [Abstract] Cash flows from operating activities: Net Cash Provided by (Used in) Operating Activities [Abstract] Net income (loss) Net Income (Loss) Attributable to Parent Adjustments to reconcile net income (loss) to net cash provided by (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 Gain on sale of patents Gain (Loss) on Disposition of Intangible Assets Stock-based compensation Share-based Compensation Reversal of uncertain tax positions Reversal of uncertain tax positions Reversal of previously recorded tax contingencies due to the expiration of applicable statutes of limitation. Gain on sale of marketable securities Marketable Securities, Realized Gain (Loss) Deferred income tax expense Deferred Income Tax Expense (Benefit) Other non-cash tax expense (benefit) Other Noncash Income Tax Expense Amortization of acquired developed technology Amortization of Capitalized Value of Business Acquired Asset Other Adjustments, Noncash Items, to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities, Other Changes in operating assets and liabilities: Increase (Decrease) in Operating Capital [Abstract] Accounts receivable, net Increase (Decrease) in Accounts Receivable Inventories, net Increase (Decrease) in Inventories Prepaid expenses and other current and long-term assets, net Increase (Decrease) in Prepaid, Deferred Expense and Other Assets Accounts payable Increase (Decrease) in Accounts Payable Accrued current and long-term liabilities Increase (Decrease) in Accrued Liabilities Income taxes payable Increase (Decrease) in Accrued Income Taxes Payable Net cash provided by (used in) operating activities Net Cash Provided by (Used in) Operating Activities Cash flows from investing activities: Net Cash Provided by (Used in) Investing Activities [Abstract] Proceeds from sales and maturities of marketable securities Proceeds from Sale and Maturity of Marketable Securities Purchases of property and equipment Payments to Acquire Property, Plant, and Equipment Proceeds from sale of patents Proceeds from Sale of Other Assets Purchases of marketable securities Payments to Acquire Available-for-sale Securities Purchases of other assets Payments to Acquire Other Productive Assets Proeeds from sales of property and equipment Proceeds from Sale of Property, Plant, and Equipment 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] Repurchase of debentures currently payable Repayments of Short-term Debt Net proceeds from equity offering Proceeds from Issuance of Common Stock Payments on line of credit Repayments of Lines of Credit Payments on asset financings Repayments of Other Debt Proceeds from issuances of common stock Proceeds from Issuance of Shares under Incentive and Share-based Compensation Plans, Including Stock Options Net cash used in financing activities Net Cash Provided by (Used in) Financing Activities Net change 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 Risks and Uncertainties [Abstract] Concentration Risk Disclosure Concentration Risk Disclosure [Text Block] Stockholders' Equity Note [Abstract] Stockholders' Equity Note Disclosure Stockholders' Equity Note Disclosure [Text Block] Supplemental Cash Flow Information [Abstract] Cash Flow, Supplemental Disclosures Cash Flow, Supplemental Disclosures [Text Block] MARKETABLE SECURITIES AND FAIR VALUE MEASUREMENTS [Abstract] MARKETABLE SECURITIES AND FAIR VALUE MEASUREMENTS [Abstract] Marketable securities and fair value measurements Marketable securities and fair value measurements [Text Block] This item represents disclosures related to Marketable Securities and fair value of financial instruments. [Text Block] Earnings Per Share [Abstract] Earnings Per Share Earnings Per Share [Text Block] INCOME TAXES [Abstract] INCOME TAXES [Abstract] Income Tax Disclosure Income Tax Disclosure [Text Block] Comprehensive Income Note [Abstract] Comprehensive Income Note Comprehensive Income Note [Text Block] General Policies [Abstract] Organization, Consolidation and Presentation of Financial Statements Disclosure Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] COMMITMENTS AND CONTINGENCIES [Abstract] COMMITMENTS AND CONTINGENCIES [Abstract] Commitments and Contingencies Disclosure Commitments and Contingencies Disclosure [Text Block] SEGMENT INFORMATION [Abstract] SEGMENT INFORMATION [Abstract] Segment Reporting Disclosure Segment Reporting Disclosure [Text Block] Income Statement [Abstract] Revenue, net Sales Revenue, Goods, Net Cost of revenue (1) Cost of Goods Sold Gross profit Gross Profit Operating expenses: Operating Expenses [Abstract] Research and development (2) Research and Development Expense Selling, general and administrative (3) Selling, General and Administrative Expense Restructuring Restructuring Charges Total operating expenses Operating Expenses Loss from operations Operating Income (Loss) Interest expense and other, net Other Nonoperating Income (Expense) Gain on sale of marketable securities Gain on sale of patents Total other income (loss), net Nonoperating Income (Expense) Loss before income taxes Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Cumulative Effects of Changes in Accounting Principles, Noncontrolling Interest Benefit for income taxes Income Tax Expense (Benefit) Net income (loss) Net income (loss) per share: Basic Earnings Per Share, Basic Diluted Earnings Per Share, Diluted Weighted average shares outstanding: Weighted average shares outstanding basic and diluted: [Abstract] Weighted average shares outstanding basic and diluted: [Abstract] Basic Weighted Average Number of Shares Outstanding, Basic Diluted Weighted Average Number of Shares Outstanding, Diluted Document and Entity Information [Abstract] Document and Entity Information [Abstract] Entities [Table] Entities [Table] Legal Entity [Axis] Legal Entity [Axis] Entity [Domain] Entity [Domain] Entity Information [Line Items] Entity Information [Line Items] 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 Filer Category Entity Filer Category Document Type Document Type Document Period End Date Document Period End Date Document Fiscal Year Focus Document Fiscal Year Focus Document Fiscal Period Focus Document Fiscal Period Focus Amendment Flag Amendment Flag Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Condensed Consolidated Statement of Operations Parenthetical [Abstract] Condensed Consolidated Statement of Operations Parenthetical [Abstract] Cost of revenue Cost of Sales [Member] Research and development Other Research and Development Expense [Member] Selling, general and administrative General and Administrative Expense [Member] Additional amortization of non-cancelable prepaid royalty Amortization of Advance Royalty Stock-based compensation Allocated Share-based Compensation Expense Amortization of acquired developed technology Amortization of Intangible Assets