Segment Reporting [Abstract] Revenue by Geography [Table] Schedule of Revenues from External Customers and Long-Lived Assets [Table] Statement, Geographical [Axis] Geographical [Axis] Segment, Geographical [Domain] Segment, Geographical [Domain] Japan JAPAN Taiwan TAIWAN, PROVINCE OF CHINA United States UNITED STATES China CHINA Europe Segment, Geographical, Groups of Countries, Group One [Member] Korea KOREA, REPUBLIC OF Other Segment, Geographical, Groups of Countries, Group Two [Member] Statement [Line Items] Statement [Line Items] Revenue, net Revenue, Net Research and Development [Abstract] Research and Development Collaborative Arrangement Disclosure [Text Block] Organization, Consolidation and Presentation of Financial Statements [Abstract] Use of Estimates Policy Use of Estimates, Policy [Policy Text Block] Receivables, Policy Receivables, Policy [Policy Text Block] Inventory, Policy Inventory, Policy [Policy Text Block] Fair Value of Financial Instruments, Policy Fair Value of Financial Instruments, Policy [Policy Text Block] Co-Development Arrangements, Policy Collaborative Arrangement, Accounting Policy [Policy Text Block] BALANCE SHEET COMPONENTS [Abstract] BALANCE SHEET COMPONENTS [Abstract] Accounts Receivable, Net [Abstract] Accounts Receivable, Net [Abstract] Accounts receivable, gross Accounts Receivable, Gross Less: allowance for doubtful accounts Allowance for Doubtful Accounts Receivable, Current Accounts receivable, net Accounts Receivable, Net, Current INTEREST EXPENSE AND OTHER, NET [Abstract] INTEREST EXPENSE AND OTHER, NET [Abstract] Interest expense Interest Expense Amortization of debt issuance costs Debt Related Commitment Fees and Debt Issuance Costs Interest income Interest and Other Income Total interet expense and other, net Other Nonoperating Income (Expense) Income Tax Disclosure [Abstract] 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. Liability for uncertain tax positions Liability for Uncertain Tax Positions, Noncurrent Estimated decrease in total gross unrecogized tax benefits as a result of resolutions of global tax examinations and expiration of applicable statutes of limitations, including interest and penalties Significant Change in Unrecognized Tax Benefits is Reasonably Possible, Estimated Range of Change, Upper Bound Fair Value Disclosures [Abstract] Assets Measured at Fair Value on a Recurring Basis Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] Risks and Uncertainties [Abstract] Risks and Uncertainties Concentration Risk Disclosure [Text Block] Balance Sheet Components Balance sheet components [Text Block] Balance sheet components [Text Block] Supplemental Cash Flow Information [Abstract] Supplemental Cash Flow Information Cash Flow, Supplemental Disclosures [Text Block] Deferred research and development reimbursement Deferred research and development reimbursement Deferred benefit for reimbursement payments associated with development agreements. Accrued payroll and related liabilities Employee-related Liabilities, Current Current portion of accrued liabilities for asset financings Other Liabilities, Current Accrued commissions and royalties Accrued Commisions and Royalties, Current Carrying value as of the balance sheet date of obligations incurred through that date and payable for commisions and royalties. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer). Accrued interest payable Interest Payable, Current Reserve for warranty returns Standard Product Warranty Accrual Other Other Accrued Liabilities, Current Total Accrued Liabilities, Current Movement in Standard Product Warranty Accrual [Roll Forward] Movement in Standard Product Warranty Accrual [Roll Forward] Balance at beginning of period Provision (benefit) Standard Product Warranty Accrual, Warranties Issued Charge-offs Standard Product Warranty Accrual, Payments Balance at end of period Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Income Statement [Abstract] Statement [Table] Statement [Table] Statement, Scenario [Axis] Scenario [Axis] Scenario, Unspecified [Domain] Scenario, Unspecified [Domain] 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 Earnings Per Share [Abstract] Earnings Per Share Schedule of Earnings Per Share Reconciliation [Table Text Block] Antidilutive Securities Excluded from Computation of Earnings Per Share Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block] Segment Information Segment Reporting Disclosure [Text Block] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Table] Fair Value Measurements, Recurring and Nonrecurring [Table] Fair Value, Hierarchy [Axis] Fair Value, Hierarchy [Axis] Fair Value, Measurements, Fair Value Hierarchy [Domain] Fair Value, Measurements, Fair Value Hierarchy [Domain] Level 1 Fair Value, Inputs, Level 1 [Member] Level 2 Fair Value, Inputs, Level 2 [Member] Level 3 Fair Value, Inputs, Level 3 [Member] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Money market funds Cash and Cash Equivalents, Fair Value Disclosure Employee equity incentive plans Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Accounts Receivable, Net Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block] Allowance for Doubtful Accounts Allowance for Credit Losses on Financing Receivables [Table Text Block] Inventories Schedule of Inventory, Current [Table Text Block] Property and Equipment, Net Schedule of property and equipment [Table Text Block] Schedule of property and equipment Accrued Liabilities and Current Portion of Long-Term Liabilities Schedule of Accrued Liabilities [Table Text Block] Reserve for Warranty Returns Schedule of Product Warranty Liability [Table Text Block] Allowance for Doubtful Accounts Receivable [Roll Forward] Allowance for Doubtful Accounts Receivable [Roll Forward] Balance at beginning of period Additions charged (reductions credited) Provision for Doubtful Accounts Balance at end of period Number of patents held Number of Patents Number of patents held by the Company related to visual display of digital image data. Interest Interest Paid Income taxes Income Taxes Paid Acquisitions of property and equipment and other assets under extended payment terms Fixed asset and other asset expenses incurred but not yet paid Future cash outflow to pay for acquisitions of property and equipment and other assets that have occurred. 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 Total operating expenses Operating Expenses Loss from operations Operating Income (Loss) Interest expense and other, net Gain on sale of patents Gain (Loss) on Disposition of Intangible Assets Gain on sale of marketable securities Available-for-sale Securities, Gross Realized Gain (Loss), Excluding Other than Temporary Impairments Total other income (expense), net Nonoperating Income (Expense) Loss before income taxes Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest Provision (benefit) for income taxes Income Tax Expense (Benefit) Net loss Net Income (Loss) Attributable to Parent Net loss per share - basic and diluted Earnings Per Share, Basic and Diluted Weighted average shares outstanding - basic and diluted Weighted Average Number of Shares Outstanding, Basic and Diluted Interest Expense and Other, Net Schedule of Other Nonoperating Income (Expense) [Table Text Block] Schedule of Revenue by Major Customers, by Reporting Segments [Table] Schedule of Revenue by Major Customers, by Reporting Segments [Table] Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Domain] Concentration Risk Benchmark [Domain] Sales Revenue, Net Sales [Member] Major Customers [Axis] Major Customers [Axis] Name of Major Customer [Domain] Name of Major Customer [Domain] All Distributors All Distributors [Member] All Distributors [Member] Distributor A Distributor A [Member] Distributor A [Member] Top five end customers Top five end customers [Member] Top five end customers [Member] End customer A End customer A [Member] End customer A [Member] End customer B End customer B [Member] End customer B [Member] End customer C End customer C [Member] End customer C [Member] End customer D End customer D [Member] End customer D [Member] Revenue, Major Customer Revenue, Major Customer [Line Items] Percentage of revenue Concentration Risk, Percentage Net loss Shares used in computing net loss per share - basic and diluted Net loss per common share - basic and diluted Shares issued under equity offering Stock Issued During Period, Shares, New Issues Amount payable as of date of development agreement Amount payable as of date of development agreement Amounts payable upon signing of development agreements entered into during the quarter. Number of payments due upon completion of milestones Number of payments due upon completion of milestones The number of payments triggered and due upon completion of certain milestones under development agreements entered into during the quarter. Amount payable upon completion of milestones Amount payable upon completion of milestones Amounts payable upon completion of certain development milestones for development agreements entered into during the quarter. Basis of Presentation Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] Geographic Information Schedule of Revenue from External Customers and Long-Lived Assets, by Geographical Areas [Table Text Block] Revenue by Major Customer Schedule of Revenue by Major Customers by Reporting Segments [Table Text Block] Accounts Receivable by Major Customer Schedule of accounts receivable percentages from significant customers [Table Text Block] This element may be used to disclose the percentage of accounts receivable from individual significant customers, those representing 10% or more of total accounts receivable. Line of Credit Facility [Abstract] Line of Credit Facility [Abstract] Maximum borrowing capacity Line of Credit Facility, Maximum Borrowing Capacity Maximum borrowing capacity as a percentage of eligible A/R Line of credit facility, maximum borrowing capacity, limited by eligible A/R Maximum amount available to borrow under revolving line of credit is limited by the lesser of $10 million or 80% of eligible domestic accounts receivable and certain foreign accounts receivable. Maximum borrowing capacity under non-formula advances Line of credit facility, maximum borrowing capacity under non-formula advances Line of credit facility, maximum borrowing capacity under non-formula advances which may be made solely during the last five busines days of any fiscal month or quarter and which must be repaid by the Company on or before the fifth business day after the applicable fiscal month or quarter end. Repayment terms for non-formula advances Line of credit facility, repayment terms non-formula advances Number of days allowed for repayment of non-formula advances, per the terms of the revolving loan agreement. 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 Reclassification of unrealized gain upon sale of available-for-sale securities Other Comprehensive Income (Loss), Reclassification Adjustment for Sale of Securities Included in Net Income, before Tax Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] Accounts Receivable Accounts Receivable [Member] Account A AR Account A AR [Member] Account A AR [Member] [Member] Account B AR Account B AR [Member] Account B AR [Member] [Member] Account C AR Account C AR [Member] Account C AR [Member] [Member] Segment Reporting Information Segment Reporting Information [Line Items] Percentage of accounts receivable Incomes Taxes Income Tax Disclosure [Text Block] Statement of Other Comprehensive Income [Abstract] Other comprehensive income (loss): Other Comprehensive Income (Loss), Net of Tax [Abstract] Reclassification of unrealized gain upon sale of available-for-sale securities Unrealized loss on available-for-sale securities Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, before Tax Tax effect of unrealized gain on available-for-sale securities Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Tax Total comprehensive loss Comprehensive Income (Loss), Net of Tax, Attributable to Parent 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 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 Reversal of uncertain tax positions Stock-based compensation Share-based Compensation Loss on asset disposal Gain (Loss) on Disposition of Assets Gain on sale of patents Gain on sale of marketable securities Deferred income tax expense Deferred Income Tax Expense (Benefit) Other non-cash tax expense Other Noncash Income Tax Expense Other Other Noncash Income (Expense) Changes in operating assets and liabilities: Increase (Decrease) in Operating Capital [Abstract] Accounts receivable, net Increase (Decrease) in Accounts Receivable Inventories Increase (Decrease) in Inventories Prepaid expenses and other current and long-term assets, net Increase (Decrease) in Prepaid 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 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] Purchases of property and equipment Payments to Acquire Property, Plant, and Equipment Proceeds from sales and maturities of marketable securities Proceeds from Sale and Maturity of Marketable Securities Proceeds from sale of patents Proceeds from Sale of Other Assets 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] 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 Repurchase of debentures Repayments of Subordinated Debt Net proceeds from equity offering Proceeds from Issuance of Common Stock Payments on line of credit Repayments of Lines of Credit 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, at Carrying Value Cash and cash equivalents, end of period Range [Axis] Range [Axis] Range [Domain] Range [Domain] Minimum Minimum [Member] Number of major end customers Segment Reporting, Additional Information about Entity's Reportable Segments Concentration risk benchmark percentage Concentration risk benchmark percentage Percentage threshold over which a concentration risk is deemed to exist necessitating disclosure. Gross carrying amount Property, Plant and Equipment, Gross Less: accumulated depreciation and amortization Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Property and equipment, net Property, Plant and Equipment, Net Statement of Financial Position [Abstract] ASSETS Assets [Abstract] Current assets: Assets, Current [Abstract] Cash and cash equivalents Accounts receivable, net Inventories Inventory, Net Prepaid expenses and other current assets Prepaid Expense and Other Assets, Current Total current assets Assets, Current Property and equipment, net Other assets, net Other Assets, Noncurrent Total assets Assets LIABILITIES AND SHAREHOLDERS’ EQUITY Liabilities and Equity [Abstract] Current liabilities: Liabilities, Current [Abstract] Accounts payable Accounts Payable, Current Accrued liabilities and current portion of long-term liabilities Current portion of income taxes payable Accrued Income Taxes, 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 11) Commitments and Contingencies Shareholders’ equity: Stockholders' Equity Attributable to Parent [Abstract] Preferred stock Preferred Stock, Value, Issued Common stock Common Stock, Including Additional Paid in Capital Accumulated other comprehensive 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 Equity Earnings Per Share Earnings Per Share [Text Block] Fair Value Measurements Fair Value Disclosures [Text Block] Finished goods Inventory, Finished Goods, Gross Work-in-process Inventory, Work in Process, Gross Total Interest Expense and Other, Net Other Income and Other Expense Disclosure [Text Block] Supplemental Cash Flow Information Schedule of Cash Flow, Supplemental Disclosures [Table Text Block] Research and development benefit recognized Research And Development Benefit Recognized Offset to research and development expense under development agreements. Due and payable under development agreement Amounts due and payable Amounts due and payable for reimbursement under development agreements.