Revenue from Contract with Customer [Abstract] Disaggregation of Revenue Disaggregation of Revenue [Table Text Block] Statement of Cash Flows [Abstract] Statement [Table] Statement [Table] Consolidation Items [Axis] Consolidation Items [Axis] Consolidation Items [Domain] Consolidation Items [Domain] Eliminations and Reclassifications Consolidation, Eliminations [Member] Consolidated Entities [Axis] Consolidated Entities [Axis] Consolidated Entities [Domain] Consolidated Entities [Domain] Parent Company Parent Company [Member] Guarantor Subsidiaries Guarantor Subsidiaries [Member] Non-Guarantor Subsidiaries Non-Guarantor Subsidiaries [Member] Restatement [Axis] Restatement [Axis] Restatement [Domain] Restatement [Domain] Statement [Line Items] Statement [Line Items] 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 operating activities: Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Depreciation Depreciation Intangible assets amortization (Note 4) Amortization of Intangible Assets Loss on debt extinguishment (Note 6) Gain (Loss) on Extinguishment of Debt Deferred income taxes Deferred Income Tax Expense (Benefit) Foreign currency adjustments Foreign Currency Transaction Gain (Loss), Unrealized Asset impairment (Note 9) Asset Impairment Charges Stock-based compensation expense Share-based Compensation Other, net Other Operating Activities, Cash Flow Statement 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 non-current assets Increase (Decrease) in Prepaid Expense and Other Assets Accounts payable and accrued liabilities Increase (Decrease) in Accounts Payable and Accrued Liabilities Income tax payable and receivable Increase (Decrease) in Income Taxes Payable Other liabilities Increase (Decrease) in Other Operating Liabilities Net cash provided by operating activities Net Cash Provided by (Used in) Operating Activities Investing activities: Net Cash Provided by (Used in) Investing Activities [Abstract] Purchase of property and equipment Payments to Acquire Property, Plant, and Equipment Purchase of debt securities and other investments Payments to Acquire Debt Securities, Available-for-sale Proceeds from maturities of other investments Proceeds from Sale and Maturity of Debt Securities, Available-for-sale Other investing activities Payments for (Proceeds from) Other Investing Activities Net cash used in investing activities Net Cash Provided by (Used in) Investing Activities Financing activities: Net Cash Provided by (Used in) Financing Activities [Abstract] Payment of debt (Note 6) Repayments of Long-term Debt Proceeds from debt issuances (Note 6) Proceeds from (Repayments of) Debt Repurchase of common stock, including transaction costs (Note 7) Payments for Repurchase of Common Stock Proceeds from the issuance of common stock Proceeds from Issuance of Shares under Incentive and Share-based Compensation Plans, Including Stock Options Tax withholding paid on behalf of employees for restricted stock units Payments Related to Tax Withholding for Share-based Compensation Other financing activities Proceeds from (Payments for) Other Financing Activities Net cash used in financing activities Net Cash Provided by (Used in) Financing Activities Effect of exchange rate changes on cash Effect of Exchange Rate on Cash and Cash Equivalents Net (decrease) increase in cash, cash equivalents and restricted cash Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect Cash, cash equivalents and restricted cash at the beginning of the period Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents Cash, cash equivalents and restricted cash at the end of the period Capital expenditure adjustments included in accounts payable and accrued liabilities Change in Capital Expenditures Incurred but Not Paid Change in Capital Expenditures Incurred but Not Paid Goodwill and Intangible Assets Disclosure [Abstract] INTANGIBLE ASSETS Goodwill and Intangible Assets Disclosure [Text Block] Debt Disclosure [Abstract] Schedule of Long-term Debt Instruments [Table] Schedule of Long-term Debt Instruments [Table] Long-term Debt, Type [Axis] Long-term Debt, Type [Axis] Long-term Debt, Type [Domain] Long-term Debt, Type [Domain] 6.75% Senior Notes due 2023 6.75% Senior Notes due 2023 [Member] 6.75% Senior Notes due 2023 [Member] 7.00% Senior Notes due 2025 7.00% Senior Notes due 2025 [Member] 7.00% Senior Notes due 2025 [Member] 5.5% Senior Notes due 2026 5.5% Senior Notes due 2026 [Member] 5.5% Senior Notes due 2026 [Member] Debt Instrument [Axis] Debt Instrument [Axis] Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Variable Rate [Axis] Variable Rate [Axis] Variable Rate [Domain] Variable Rate [Domain] Debt Instrument, Redemption, Period [Axis] Debt Instrument, Redemption, Period [Axis] Debt Instrument, Redemption, Period [Domain] Debt Instrument, Redemption, Period [Domain] Range [Axis] Range [Axis] Range [Domain] Range [Domain] Debt Instrument [Line Items] Debt Instrument [Line Items] Document Period End Date Document Period End Date Long-term debt Long-term Debt Unamortized Debt Issuance Expense Unamortized Debt Issuance Expense Document and Entity Information [Abstract] Document and entity information. Entity Registrant Name Entity Registrant Name Entity Central Index Key Entity Central Index Key Document Type Document Type Amendment Flag Amendment Flag Document Fiscal Year Focus Document Fiscal Year Focus Document Fiscal Period Focus Document Fiscal Period Focus Current Fiscal Year End Date Current Fiscal Year End Date Entity Filer Category Entity Filer Category Entity Emerging Growth Company Entity Emerging Growth Company Entity Small Business Entity Small Business Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Organization, Consolidation and Presentation of Financial Statements [Abstract] BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] Equity [Abstract] STOCK REPURCHASES Stockholders' Equity Note Disclosure [Text Block] Inventory Disclosure [Abstract] Components of inventories Inventory, Net, Items Net of Reserve Alternative [Abstract] Raw materials Inventory, Raw Materials, Net of Reserves Work in process Inventory, Work in Process, Net of Reserves Finished goods Inventory, Finished Goods, Net of Reserves Total inventories Inventory, Net Income Tax Disclosure [Abstract] Income tax expense (benefit) Income Tax Expense (Benefit) Effective tax rate Effective Income Tax Rate Reconciliation, Percent Discrete tax expense (benefit) Discrete tax expense (benefit) Discrete tax expense (benefit) Effective income tax rate reconciliation, discrete provisional tax expense Effective Income Tax Rate Reconciliation, Deduction, Other, Amount Gross unrecognized tax benefits Unrecognized Tax Benefits Disaggregation of Revenue [Table] Disaggregation of Revenue [Table] Geographical [Axis] Geographical [Axis] Geographical [Domain] Geographical [Domain] China CHINA Taiwan TAIWAN, PROVINCE OF CHINA United States UNITED STATES Europe Europe [Member] Other Asia Other Asia [Member] Other Asia [Member] Other Countries Other Countries [Member] Other Countries [Member] Disaggregation of Revenue Disaggregation of Revenue [Line Items] Revenue Revenues Investments and Fair Value Measurements [Abstract] Investments and fair value measurements. Schedule of Available-for-sale Securities [Table] Schedule of Available-for-sale Securities [Table] Financial Instrument [Axis] Financial Instrument [Axis] Financial Instruments [Domain] Financial Instruments [Domain] Debt Securities [Member] Debt Securities [Member] Schedule of Expected Maturities of Available-for-Sale Debt Securities[Line Items] Debt Securities, Available-for-sale [Line Items] Cost of investments in debt securities due in less than one year Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, within One Year, Amortized Cost Cost of investments in debt securities due after ten years Debt Securities, Available-for-sale, Allocated and Single Maturity Date, Maturity, after 10 Years, Amortized Cost Cost Debt Securities, Available-for-sale, Amortized Cost Estimated fair value of investments in debt securities due in less than one year Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, within One Year, Fair Value Estimated fair value of investments in debt securities due after ten years Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after 10 Years, Fair Value Estimated fair value Debt Securities, Available-for-sale Income Statement [Abstract] Cost of goods sold Cost of Goods and Services Sold Gross profit Gross Profit Operating expenses: Operating Expenses [Abstract] Research and development Research and Development Expense Selling, general and administrative Selling, General and Administrative Expense Other operating expense (Note 9) Other Operating Income (Expense), Net Total operating expenses Operating Expenses Income from operations Operating Income (Loss) Interest expense (Note 6) Interest Expense Interest income Investment Income, Net Other expense (Note 6) Other Nonoperating Income (Expense) Income before income taxes Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest Income tax (expense) benefit (Note 11) Net income (loss) Net income (loss) per share (Note 12): Earnings Per Share [Abstract] Basic Earnings Per Share, Basic Diluted Earnings Per Share, Diluted Weighted average shares of common stock outstanding (Note 12): Weighted Average Number of Shares Outstanding, Diluted [Abstract] Basic Weighted Average Number of Shares Outstanding, Basic Diluted Weighted Average Number of Shares Outstanding, Diluted Statement of Comprehensive Income [Abstract] Other comprehensive (loss) income: Other Comprehensive Income (Loss), Net of Tax [Abstract] Unrealized (loss) gain on marketable securities, net of tax Other Comprehensive Income (Loss), Securities, Available-for-Sale, Unrealized Holding Gain (Loss) Arising During Period, after Tax Foreign currency translation adjustment, including intra-entity foreign currency transactions that are of a long-term investment nature Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss), before Reclassification and Tax Reclassification adjustments, net of tax: AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward] Foreign currency gain included in net income (loss) Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss) Arising During Period, Net of Tax Amortization of pension actuarial loss Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, after Tax Other comprehensive (loss) income Other Comprehensive Income (Loss), Net of Tax Total comprehensive income (loss) Comprehensive Income (Loss), Net of Tax, Attributable to Parent Equity Securities without Readily Determinable Fair Value, Amount Equity Securities without Readily Determinable Fair Value, Amount Segment Reporting [Abstract] Summary of details of reportable segments Reconciliation of Operating Profit (Loss) from Segments to Consolidated [Table Text Block] Summary of reconciliation of "All other" category Segment Reporting Information Other [Table Text Block] Segment reporting information other. Restructuring [Abstract] Restructuring [Abstract] Schedule of Restructuring and Related Costs [Table] Schedule of Restructuring and Related Costs [Table] Minimum Minimum [Member] Maximum Maximum [Member] Restructuring Type [Axis] Restructuring Type [Axis] Type of Restructuring [Domain] Type of Restructuring [Domain] Accelerated Depreciation Accelerated Depreciation [Member] Accelerated Depreciation [Member] Other Exit Costs Other Restructuring [Member] One-time Termination Benefits One-time Termination Benefits [Member] Impairment of property and equipment Impairment of property and equipment [Member] Impairment of property and equipment [Member] Income Statement Location [Axis] Income Statement Location [Axis] Income Statement Location [Domain] Income Statement Location [Domain] Other Operating Expense Other Operating Income (Expense) [Member] Cost of Sales Cost of Sales [Member] Restructuring Restructuring Cost and Reserve [Line Items] Restructuring and Related Cost, Expected Cost Remaining Restructuring and Related Cost, Expected Cost Remaining Restructuring and Related Cost, Incurred Cost Restructuring and Related Cost, Incurred Cost Each additional 90-day period Weighted Average [Member] Lender Name [Axis] Lender Name [Axis] Line of Credit Facility, Lender [Domain] Line of Credit Facility, Lender [Domain] Bank of America Syndicate [Member] Bank of America Syndicate [Member] Bank of America Syndicate [Member] Credit Facility [Axis] Credit Facility [Axis] Credit Facility [Domain] Credit Facility [Domain] Credit Agreement [Member] Credit Agreement [Member] Credit Agreement [Member] Senior Delayed Draw Term Loan [Member] Senior Delayed Draw Term Loan [Member] Senior Delayed Draw Term Loan [Member] Revolving Credit Facility [Member] Revolving Credit Facility [Member] Standby Letters of Credit [Member] Standby Letters of Credit [Member] Swingline Loan [Member] Bridge Loan [Member] Senior notes Senior Notes [Member] Senior Delayed Draw Term Loan, Maximum Amount Senior Delayed Draw Term Loan, Maximum Amount Senior Delayed Draw Term Loan, Maximum Amount Debt Instrument, Face Amount Debt Instrument, Face Amount Stated Interest Rate Debt Instrument, Interest Rate, Stated Percentage Repayments of Senior Debt Repayments of Senior Debt Senior notes, redemption percentage, actual Senior notes, redemption percentage, actual Senior notes, redemption percentage, actual Gain (Loss) on Extinguishment of Debt Tender Offer Cap Tender Offer Cap Tender Offer Cap - maximum amount available to be repurchased under a tender offer Debt Instrument, Redemption Price, Percentage of Principal Amount Redeemed Debt Instrument, Redemption Price, Percentage of Principal Amount Redeemed Debt Instrument, Redemption Price, Percentage Debt Instrument, Redemption Price, Percentage Proceeds from Lines of Credit Proceeds from Lines of Credit Interest Expense, Borrowings Interest Expense, Borrowings Interest Costs Capitalized Interest Costs Capitalized Interest Paid Interest Paid, Including Capitalized Interest, Operating and Investing Activities Long-term Debt, Fair Value Long-term Debt, Fair Value Line of Credit Facility, Maximum Borrowing Capacity Line of Credit Facility, Maximum Borrowing Capacity Line of Credit Facility, Maximum amount of increase that may be requested Line of Credit Facility, Maximum amount of increase that may be requested Line of Credit Facility, Maximum amount of increase that may be requested Debt, Interest Rate, Default Increase, Percentage Debt, Interest Rate, Default Increase, Percentage Debt, Interest Rate, Default Increase, Percentage Statement of Financial Position [Abstract] Income (loss) from operations Interest expense Other expense (income) Income in subsidiaries Income (Loss) from Subsidiaries, Net of Tax Comprehensive income (loss) Numerator: Earnings Per Share Reconciliation [Abstract] Numerator for basic and diluted net income (loss) per share — net income (loss) available to common stockholders Denominator: Denominator [Abstract] Denominator. Denominator for basic net income (loss) per share — weighted average shares Effect of dilutive securities: Incremental Weighted Average Shares Attributable to Dilutive Effect [Abstract] Stock-based awards Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements Denominator for diluted net income (loss) per share — adjusted weighted average shares and assumed conversions Basic net loss per share (in dollars per share) Diluted net loss per share (in dollars per share) Schedule of Long-term Debt Instruments Schedule of Long-term Debt Instruments [Table Text Block] Schedule of Business Acquisitions, by Acquisition [Table] Schedule of Business Acquisitions, by Acquisition [Table] 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 Technology Developed Technology Rights [Member] Customer Relationships Customer Relationships [Member] Finite-Lived Intangible Assets [Line Items] Finite-Lived Intangible Assets [Line Items] Finite-Lived Intangible Assets, Net Finite-Lived Intangible Assets, Net Intangible assets, net Intangible Assets, Net (Excluding Goodwill) Amortization expense Restructuring Restructuring and Related Activities Disclosure [Text Block] Consolidating Financial Information [Abstract] Consolidating Financial Information [Abstract] Condensed Balance Sheet Condensed Balance Sheet [Table Text Block] Condensed Statement of Comprehensive Income Condensed Statement of Comprehensive Income [Table Text Block] Condensed Cash Flow Statement Condensed Cash Flow Statement [Table Text Block] Revenue for product and services over time as a percent of total revenue (less than) Revenue for product and services over time as a percent of total revenue Revenue for product and services over time as a percent of total revenue Cumulative effect of adoption as a percentage of revenue (less than) Cumulative effect of adoption as a percentage of revenue Cumulative effect of adoption as a percentage of revenue Rebates as percentage of sales (less than) Rebates As Percentage Of Sales1 Rebates As Percentage Of Sales1 Remaining unsatisfied performance obligations with an original duration of greater than one year Revenue, Remaining Performance Obligation, Amount Available-for-sale debt securities Available-for-sale Securities [Table Text Block] Expected distribution of available-for-sale debt securities Investments Classified by Contractual Maturity Date [Table Text Block] Fair value of the financial assets measured at fair value on a recurring basis Fair Value, Assets Measured on Recurring Basis [Table Text Block] U.S Tax Cuts and Jobs Act New Accounting Pronouncements or Change in Accounting Principle [Table] Income Tax Authority [Axis] Income Tax Authority [Axis] Income Tax Authority [Domain] Income Tax Authority [Domain] U.S. Tax Cuts and Jobs Act, Effective 2018 [Member] U.S. Tax Cuts and Jobs Act, Effective 2018 [Member] U.S. Tax Cuts and Jobs Act, Effective 2018 [Member] U.S. Tax Cuts and Jobs Act [Line Items] U.S Tax Cuts and Jobs Act [Line Items] U.S Tax Cuts and Jobs Act [Line Items] Income tax expense (benefit) Estimated repatriation tax expense Effective Income Tax Rate Reconciliation, Repatriation of Foreign Earnings, Amount Remeasurement expense (benefit) of U.S. deferred tax assets and liabilities Remeasurement expense (benefit) of U.S. deferred tax assets and liabilities Remeasurement expense (benefit) of U.S. deferred tax assets and liabilities Measurement period adjustment, income tax expense (benefit) Measurement period adjustment, income tax expense (benefit) Measurement period adjustment, income tax expense (benefit) Increase (decrease) in Transitional Repatriation Tax liability Increase (decrease) in Transitional Repatriation Tax liability Increase (decrease) in Transitional Repatriation Tax liability Increase (decrease) in deferred tax assets Increase (decrease) in deferred tax assets Increase (decrease) in deferred tax assets New Accounting Pronouncements and Changes in Accounting Principles [Abstract] RECENT ACCOUNTING PRONOUNCEMENTS New Accounting Pronouncements and Changes in Accounting Principles [Text Block] Reconciliation of the numerators and denominators in the computation of basic and diluted net loss per share Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] DEBT Debt Disclosure [Text Block] Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Short-term investments (Note 5) Short-term Investments Accounts receivable, less allowance Accounts Receivable, Net, Current Intercompany accounts and notes receivable Intercompany receivables Intercompany receivables Inventories Prepaid expenses Prepaid Expense, Current Other receivables Other Receivables Other current assets Other Assets, Current Total current assets Assets, Current Property and equipment, net Property, Plant and Equipment, Net Goodwill Goodwill Long-term Investments Long-term Investments Long-term intercompany accounts and notes receivable Intercompany Notes Receivable, Long-Term Intercompany Notes Receivable, Long-Term Investment in subsidiaries Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures Other non-current assets Other Assets, Noncurrent Total assets Assets Accounts payable Accounts Payable, Current Intercompany accounts and notes payable Intercompany accounts and notes payable Intercompany accounts and notes payable Accrued liabilities Accrued Liabilities, Current Other current liabilities Other Liabilities, Current Total current liabilities Liabilities, Current Deferred tax liabilities Deferred Tax Liabilities, Net, Noncurrent Long-term intercompany accounts and notes payable Intercompany accounts and notes payable, long-term Intercompany accounts and notes payable, long-term Other long-term liabilities Other Liabilities, Noncurrent Total liabilities Liabilities Total stockholders’ equity Stockholders' Equity Attributable to Parent Total liabilities and stockholders’ equity Liabilities and Equity CONSOLIDATING FINANCIAL INFORMATION Consolidating Financial Information [Text Block] Consolidating Financial Information [Text Block] NET INCOME PER SHARE Earnings Per Share [Text Block] REVENUE Revenue from Contract with Customer [Text Block] INVENTORIES Inventory Disclosure [Text Block] INVESTMENTS AND FAIR VALUE MEASUREMENTS Investments and Fair Value Measurements [Text Block] Investments and fair value measurements. Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] All other Corporate, Non-Segment [Member] Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Reconciliation of "All other" category: Segment Reporting Information Other [Abstract] Segment reporting information other. Stock-based compensation expense Amortization of intangible assets Acquisition and integration related costs Business Combination, Acquisition And Integration related costs Business Combination, Acquisition And Integration related costs Restructuring costs Restructuring and disposal costs Restructuring and disposal costs Start-up costs Start-up costs Start-up costs Asset impairment and accelerated depreciation Other (including (loss) gain on assets and other miscellaneous corporate overhead) Other Unallocated Income Expense Other unallocated income expense. Loss from operations for “All other” Net Cash Provided by (Used in) Operating Activities Payments to Acquire Property, Plant, and Equipment Net transactions with related parties, investing Net transactions with related parties, investing Net transactions with related parties, investing Proceeds from the issuance of common stock Tax withholding paid on behalf of employees for restricted stock units Net transactions with related parties Net transactions with related parties Net transactions with related parties Effect of Exchange Rate on Cash and Cash Equivalents Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Table] Fair Value Measurements, Recurring and Nonrecurring [Table] Auction Rate Securities Auction Rate Securities [Member] Marketable Equity Securities Equity Securities [Member] Money Market Funds Money Market Funds [Member] Measurement Frequency [Axis] Measurement Frequency [Axis] Fair Value, Measurement Frequency [Domain] Fair Value, Measurement Frequency [Domain] Recurring [Member] Fair Value, Measurements, Recurring [Member] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] Quoted Prices In Active Markets For Identical Assets (Level 1) [Member] Fair Value, Inputs, Level 1 [Member] Significant Other Observable Inputs (Level 2) [Member] Fair Value, Inputs, Level 2 [Member] Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Money Market Funds Cash Equivalents, at Carrying Value Available-for-sale securities Invested funds in deferred compensation plan Deferred Compensation Plan Assets Total assets measured at fair value Assets, Fair Value Disclosure Deferred compensation plan obligation Deferred Compensation Liability, Current and Noncurrent Total liabilities measured at fair value Financial and Nonfinancial Liabilities, Fair Value Disclosure Fair Value of Debt Policy Fair value of debt [Policy Text Block] Fair value of debt [Policy Text Block] Equity Securities without Readily Determinable Fair Value Policy Equity Securities without Readily Determinable Fair Value [Policy Text Block] Revenue Recognition Policy Revenue Recognition, Policy [Policy Text Block] Income Tax Policy Income Tax, Policy [Policy Text Block] Fair Value Measurements Policy Fair Value Measurement, Policy [Policy Text Block] Operating Segment Policy Segment Reporting, Policy [Policy Text Block] Fair Value of Financial Instruments Policy Fair Value of Financial Instruments, Policy [Policy Text Block] Schedule of Available-for-sale debt securities Available-for-sale debt securities Debt Securities, Available-for-sale [Abstract] Cost basis Available-for-sale Securities, Amortized Cost Basis Gross unrealized losses Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax Estimated fair value Available-for-sale Securities OPERATING SEGMENT INFORMATION Segment Reporting Disclosure [Text Block] Allowance for accounts receivable Allowance for Doubtful Accounts Receivable, Current Property and equipment, accumulated depreciation Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Intangible assets, accumulated amortization Finite-Lived Intangible Assets, Accumulated Amortization Preferred stock, par value Preferred Stock, No Par Value Preferred stock, shares authorized Preferred Stock, Shares Authorized Preferred stock, shares issued Preferred Stock, Shares Issued Preferred stock, shares outstanding Preferred Stock, Shares Outstanding Common stock, par value Common Stock, No Par Value Common stock, shares authorized Common Stock, Shares Authorized Common stock, shares issued Common Stock, Shares, Issued Common stock, shares outstanding Common Stock, Shares, Outstanding Components of inventories Schedule of Inventory, Current [Table Text Block] Schedule of Stock by Class [Table] Schedule of Stock by Class [Table] Stock Repurchase Program [Axis] Share Repurchase Program [Axis] Stock Repurchase Program [Domain] Share Repurchase Program [Domain] November 2016 Program November 2016 Program [Member] November 2016 Program [Member] May 2018 Program May 2018 Program [Member] May 2018 Program [Member] Class of Stock [Line Items] Class of Stock [Line Items] Stock Repurchase Program, Authorized Amount Stock Repurchase Program, Authorized Amount Stock Repurchased During Period, Shares Stock Repurchased During Period, Shares Stock Repurchased During Period, Value Stock Repurchased During Period, Value Stock Repurchase Program, Remaining Authorized Repurchase Amount Stock Repurchase Program, Remaining Authorized Repurchase Amount INCOME TAXES Income Tax Disclosure [Text Block] ASSETS Assets [Abstract] Current assets: Assets, Current [Abstract] Cash and cash equivalents Accounts receivable, less allowance of $159 and $134 as of December 29, 2018 and March 31, 2018, respectively Inventories (Note 3) Property and equipment, net of accumulated depreciation of $1,159,495 at December 29, 2018 and $911,910 at March 31, 2018 Goodwill Intangible assets, net of accumulated amortization of $2,110,694 at December 29, 2018 and $1,711,520 at March 31, 2018 (Note 4) Long-term investments (Note 5) LIABILITIES AND STOCKHOLDERS’ EQUITY Liabilities and Equity [Abstract] Current liabilities: Liabilities, Current [Abstract] Long-term debt (Note 6 ) Deferred tax liabilities (Note 11) Stockholders’ equity: Stockholders' Equity Attributable to Parent [Abstract] Preferred stock, $.0001 par value; 5,000 shares authorized; no shares issued and outstanding Preferred Stock, Value, Issued Common stock and additional paid-in capital, $.0001 par value; 405,000 shares authorized; 123,001 and 126,322 shares issued and outstanding at December 29, 2018 and March 31, 2018, respectively Common Stock, Value, Issued Accumulated other comprehensive loss, net of tax Accumulated Other Comprehensive Income (Loss), Net of Tax Accumulated deficit Retained Earnings (Accumulated Deficit) Reconciliation of Operating Profit (Loss) from Segments to Consolidated [Table] Reconciliation of Operating Profit (Loss) from Segments to Consolidated [Table] Operating Segments Operating Segments [Member] Statement, Business Segments [Axis] Segments [Axis] Segments [Domain] Segments [Domain] MP Mobile Products [Member] Mobile Products [Member] IDP Infrastructure and Defense Products [Member] Infrastructure and Defense Products [Member] Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] Summary of details of reportable segments Reconciliation of Operating Profit (Loss) from Segments to Consolidated [Abstract] Revenue: Segment Reporting Information, Revenue for Reportable Segment [Abstract] Income from operations: Segment Reporting Information, Operating Income (Loss) [Abstract] Income before income taxes Antidilutive shares excluded from the computation of diluted shares outstanding Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Net Income (Loss) Per Share (Textual) Net Loss Income Per Share (Textual) [Abstract] Net loss income per share. Initial aggregate principal amount of Notes issued