Segment Reporting [Abstract] Schedule of Revenue by Geographic Region Schedule of Revenue from External Customers and Long-Lived Assets, by Geographical Areas [Table Text Block] Schedule of Revenue from Significant Customers Schedule of Revenue by Major Customers by Reporting Segments [Table Text Block] Schedule of Accounts Receivable Percentage from Significant Customers 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. Balance Sheet Related Disclosures [Abstract] Finished goods Inventory, Finished Goods, Net of Reserves Work-in-process Inventory, Work in Process, Net of Reserves Inventories Inventory, Net 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] Revenue, net Sales [Member] Major Customers [Axis] Customer [Axis] Name of Major Customer [Domain] Customer [Domain] All distributors All Distributors [Member] All Distributors [Member] Distributor A Distributor A [Member] Distributor A [Member] Distributor B Distributor B [Member] Distributor B [Member] Distributor C Distributor C [Member] Distributor C [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] End customer E End customer E [Member] End customer E [Member] Revenue, Major Customer Revenue, Major Customer [Line Items] Percentage of revenue Concentration Risk, Percentage Organization, Consolidation and Presentation of Financial Statements [Abstract] Basis of Presentation Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] Supplemental Cash Flow Information [Abstract] Supplemental Cash Flow Information Schedule of Cash Flow, Supplemental Disclosures [Table Text Block] Earnings Per Share [Abstract] Employee equity incentive plans (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Risks and Uncertainties [Abstract] Risks and Uncertainties Concentration Risk Disclosure [Text Block] Research and Development [Abstract] Research and Development Collaborative Arrangement Disclosure [Text Block] Cash paid during the period for: Additional Cash Flow Elements and Supplemental Cash Flow Information [Abstract] Interest Interest Paid Income taxes Income Taxes Paid Non-cash investing and financing activities: Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract] Acquisitions of property and equipment and other assets under extended payment terms Fixed asset and other asset expenses incurred but not yet paid Acquisitions of property and equipment and other assets under extended payment terms. Number of patents held Number of Patents Number of patents held by the Company related to visual display of digital image data. Earnings Per Share Schedule of Earnings Per Share, Basic and Diluted [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] Income Tax Disclosure [Abstract] Incomes Taxes Income Tax Disclosure [Text Block] Movement in Standard Product Warranty Accrual [Roll Forward] Movement in Standard Product Warranty Accrual [Roll Forward] Balance at beginning of period Standard Product Warranty Accrual Benefit Standard Product Warranty Accrual, Warranties Issued Charge-offs Standard Product Warranty Accrual, Payments Balance at end of period Current portion of accrued liabilities for asset financings Other Liabilities, Current Accrued payroll and related liabilities Employee-related 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 Deferred revenue Deferred Revenue Reserve for warranty returns Other Other Accrued Liabilities, Current Accrued liabilities and current portion of long-term liabilities Accrued Liabilities, Current Maximum borrowing capacity Line of Credit Facility, Maximum Borrowing Capacity Line of credit facility, component of calculation for maximum borrowing amount under formula advances Line of credit facility, component of calculation for maximum borrowing amount under formula advances Maximum amount available to borrow under revolving line of credit is limited by the lesser of $10 million or $1 million plus 80% of eligible domestic accounts receivable and certain foreign accounts receivable. Line of credit facility maximum borrowing capacity limited by eligible AR Line of credit facility maximum borrowing capacity limited by eligible AR Maximum amount available to borrow under revolving line of credit is limited by the lesser of $10 million or $1 million plus 80% of eligible domestic accounts receivable and certain foreign accounts receivable. Line of credit facility, 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. Line of credit facility, amount outstanding Line of Credit Facility, Amount Outstanding Short-term debt, weighted average interest rate Short-term Debt, Weighted Average Interest Rate Supplemental Disclosure of Cash Flow Information Cash Flow, Supplemental Disclosures [Text Block] 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 Allowance for Doubtful Accounts Receivable [Roll Forward] Allowance for Doubtful Accounts Receivable [Roll Forward] Balance at beginning of period Allowance for Doubtful Accounts Receivable, Current Reductions credited Provision for Doubtful Accounts Balance at end of period Research and development benefit recognized Research And Development Benefit Recognized Offset to research and development expense under development agreements. 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 Balance Sheet Components Balance sheet components [Text Block] Balance sheet components [Text Block] 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] Earnings Per Share Earnings Per Share [Text Block] Fair Value Disclosures [Abstract] Schedule of Fair Value, Assets Measured on Recurring Basis Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] Fair Value Measurements Fair Value Disclosures [Text Block] Accounts Receivable, Net [Abstract] Accounts Receivable, Net [Abstract] Accounts receivable, gross Accounts Receivable, Gross Less: allowance for doubtful accounts Accounts receivable, net Accounts Receivable, Net, Current Income Statement [Abstract] Statement [Table] Statement [Table] Statement, Scenario [Axis] Scenario [Axis] Scenario, Unspecified [Domain] Scenario, Unspecified [Domain] Statement [Line Items] Statement [Line Items] Revenue, net Revenue, Net Cost of revenue (1) Cost of Goods and Services 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 Other Nonoperating Income (Expense) Loss before income taxes Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest 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 Net loss Shares used in computing net loss per share - basic and diluted 1 Net loss per common share - basic and diluted Stock issued during period under registered offering, shares Stock Issued During Period, Shares, New Issues 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 Accounts receivable, net Inventories 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 Short-term line of credit 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 10) Commitments and Contingencies Shareholders’ equity: Stockholders' Equity Attributable to Parent [Abstract] Preferred stock Preferred Stock, Value, Issued Common stock Common Stocks, 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 Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] Accounts Receivable Accounts Receivable [Member] Account A Account A [Member] Account A [Member] Account B Account B [Member] Account B [Member] Account C Account C [Member] Account C [Member] Account D Account D [Member] Account D [Member] Account E Account E [Member] Account E [Member] Segment Reporting Information Segment Reporting Information [Line Items] Percentage of accounts receivable Cost of revenue Cost of Sales [Member] Research and development 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 Segment Information Segment Reporting Disclosure [Text Block] Revenue by Geography [Table] Schedule of Revenues from External Customers and Long-Lived Assets [Table] Statement, Geographical [Axis] Geographical [Axis] Segment, Geographical [Domain] Geographical [Domain] Japan JAPAN United States UNITED STATES Taiwan TAIWAN, PROVINCE OF CHINA Korea KOREA, REPUBLIC OF China CHINA Europe Europe [Member] Other Geographical Region Other [Member] Other [Member] Recent Accounting Pronouncements New Accounting Pronouncements, Policy [Policy Text Block] Use of Estimates Use of Estimates, Policy [Policy Text Block] Receivables, Policy Receivables, Policy [Policy Text Block] Inventory, Policy Inventory, Policy [Policy Text Block] Statement of Cash Flows [Abstract] Cash flows from operating activities: Net Cash Provided by (Used in) Operating Activities [Abstract] Net loss 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] Stock-based compensation Share-based Compensation Depreciation and amortization Depreciation, Depletion and Amortization, Nonproduction 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. Deferred income tax expense Deferred Income Tax Expense (Benefit) 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 Net cash used in investing activities Net Cash Provided by (Used in) Investing Activities Cash flows from financing activities: Net Cash Provided by (Used in) Financing Activities [Abstract] Proceeds from issuances of common stock Proceeds from Issuance of Shares under Incentive and Share-based Compensation Plans, Including Stock Options Payments on asset financings Repayments of Other Debt Proceeds from line of credit Proceeds from Lines of Credit Net cash provided by financing activities Net Cash Provided by (Used in) Financing Activities 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 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 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] Total Estimate of Fair Value Measurement [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 Range [Axis] Range [Axis] Range [Domain] Range [Domain] Minimum Minimum [Member] Number of customers included in five largest customer concentration disclosure 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. Reversal of uncertain tax positions 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 China, income tax holiday, reduced statutory rate Income tax holiday, reduced statutory rate The reduced rate of income taxes for a reporting entity is result of the income tax holiday granted by a foreign taxing jurisdiction. China, statutory income tax rate In foreign country Statutory income tax rate In foreign country Statutory income tax rate In foreign country