Accounting Policies [Abstract] Accounting Policies [Abstract] Accounting Standards Update 2014-09 [Member] Accounting Standards Update 2014-09 [Member] Accounting Standards Update 2016-18 [Member] ASU 2016-18 [Member] Accounts, Notes, Loans and Financing Receivable [Line Items] Accounts, Notes, Loans and Financing Receivable [Line Items] Receivable Type [Axis] Receivable Type [Axis] Accounts Payable and Accrued Liabilities Disclosure [Text Block] Accrued Expenses Accounts Payable, Other, Current Other accounts payable Accounts Payable, Trade, Current Accounts payable Accounts Receivable, Net, Current Accounts receivable, net Accrued Liabilities, Current Accrued expenses Accrued expenses Accrued Liabilities Current [Member] Accrued Liabilities Current [Member] Accrued Expense [Member] Accrued Outside Service Fees Current Accrued Outside Service Fees Current Outside service fees Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Less: accumulated depreciation Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member] Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member] Accumulated Other Comprehensive Income (Loss), Cumulative Changes in Net Gain (Loss) from Cash Flow Hedges, Effect Net of Tax Derivative adjustments Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax Foreign currency translation adjustments Accumulated Other Comprehensive Income (Loss) [Line Items] Accumulated Other Comprehensive Income (Loss) [Line Items] Accumulated Other Comprehensive Income (Loss), Net of Tax Accumulated other comprehensive income (loss) Total Accumulated other comprehensive loss Accumulated Other Comprehensive Income (Loss) [Table] Accumulated Other Comprehensive Income (Loss) [Table] AOCI Attributable to Parent [Member] Accumulated Other Comprehensive Loss [Member] Accumulated Foreign Currency Adjustment Attributable to Parent [Member] Foreign Currency Translation Adjustments [Member] Additional Paid in Capital, Common Stock Additional paid-in capital Additional Paid-in Capital [Member] Additional Paid-In Capital [Member] Adjustments for New Accounting Pronouncements [Axis] Adjustments for New Accounting Pronouncements [Axis] Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition Stock-based compensation Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Adjustments to reconcile net income to net cash used in operating activities Amendment Flag Amendment Flag Amortization of Debt Issuance Costs and Discounts Amortization of debt issuance costs and original issue discount Amortization of Intangible Assets Amortization expense for intangible assets Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Conversion of exchangeable notes excluded from computation of diluted earnings per share Outstanding units and warrants excluded from computation of diluted loss per share/unit Antidilutive Securities [Axis] Antidilutive Securities [Axis] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Antidilutive Securities, Name [Domain] Antidilutive Securities, Name [Domain] Asia Pacific Other Than Korea [Member] Asia Pacific Other Than Korea [Member] Asia Pacific (Other Than Korea) [Member] Assets Total assets Total assets Assets [Abstract] Assets Assets, Current Total current assets Total current assets Assets, Current [Abstract] Current assets Assets, Fair Value Disclosure Assets fair value on non-recurring basis Balance Sheet Location [Axis] Balance Sheet Location [Axis] Balance Sheet Location [Domain] Balance Sheet Location [Domain] Basis of Accounting, Policy [Policy Text Block] Basis of Presentation Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items] Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items] Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items] Basis Of Presentation And Summary Of Significant Accounting Policies [Table] Basis Of Presentation And Summary Of Significant Accounting Policies [Table] Basis Of Presentation And Summary Of Significant Accounting Policies [Table] Building and Building Improvements [Member] Buildings and Related Structures [Member] Building [Member] Buildings [Member] Business Acquisition, Acquiree [Domain] Business Acquisition, Acquiree [Domain] Business Acquisition [Axis] Business Acquisition [Axis] Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Other Business acquisition, other current liabilities Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net Business acquisition, assets acquired and liabilities assumed, net Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Other Business acquisition, other non-current liabilities Business [Member] Business [Member] Sensor Business [Member] Calculated under Revenue Guidance in Effect before Topic 606 [Member] Amounts Without Adoption of the New Revenue Standard [Member] Capital Expenditures Incurred but Not yet Paid Property, plant and equipment additions in other accounts payable Reported Value Measurement [Member] Carrying Value [Member] Cash and Cash Equivalents, at Carrying Value Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value [Abstract] Cash, cash equivalents and restricted cash Cash and Cash Equivalents, Policy [Policy Text Block] Recently Adopted Accounting Pronouncements - Classification of Certain Cash Receipts and Cash Payments Cash and Cash Equivalents, Restricted Cash and Cash Equivalents, Policy [Policy Text Block] Recently Adopted Accounting Pronouncements - Restricted Cash Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents End of the period Beginning of the period Restricted cash, cash and cash equivalents Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect Effect of exchange rates on cash, cash equivalents and restricted cash Net increase in cash, cash equivalents and restricted cash Cash collateral for covering credit exposure in derivatives. Cash Collateral for Covering Credit Exposure In Derivatives Cash collateral for credit exposure in derivatives Cash Flow Hedging [Member] Cash Flow Hedging [Member] Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract] Non-cash investing and financing activities Changes In Inventory Reserves Table [Text Block] Changes In Inventory Reserves [Table Text Block] Changes in Inventory Reserve Class Action Complaint [Member] Class Action Complaint [Member] Securities Class Action Complaints [Member] Class of Stock [Line Items] Class of Stock [Line Items] CHINA China [Member] Commitments and Contingencies Commitments and contingencies (Note 18) Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Text Block] Commitments and Contingencies Common Stock [Member] Common Stock [Member] Common Stock Outstanding [Member] Common Stock Outstanding [Member] Common Stock Outstanding [Member] Common Stock, Par or Stated Value Per Share Common stock, par value Common Stock, Shares Authorized Common stock, shares authorized Common Stock, Shares, Issued Common stock, shares issued Common Stock, Shares, Outstanding Balance, Shares ending Balance, Shares beginning Common stock, shares outstanding Common Stock, Value, Issued Common stock, $0.01 par value, 150,000,000 shares authorized, 42,877,395 shares issued and 34,483,754 outstanding at June 30, 2018 and 42,563,808 shares issued and 34,189,599 outstanding at December 31, 2017 Retirement Benefits [Abstract] Retirement Benefits [Abstract] Compensation Related Costs, Policy [Policy Text Block] Recently Adopted Accounting Pronouncements - Compensation-Stock Compensation Comprehensive Income (Loss), Net of Tax, Attributable to Parent Total comprehensive income (loss) Comprehensive Income (Loss) Note [Text Block] Accumulated Other Comprehensive Loss Concentration Risk Benchmark [Domain] Concentration Risk Benchmark [Domain] Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Axis] Concentration Risk Type [Axis] Concentration Risk Type [Axis] Concentration Risk, Percentage Concentration risk, percentage Concentration Risk Type [Domain] Concentration Risk Type [Domain] Consolidation Items [Axis] Consolidation Items [Axis] Consolidation Items [Domain] Consolidation Items [Domain] Contract with Customer, Asset, Reclassified to Receivable Amounts billed to customers Cost of Goods and Services Sold Cost of sales Counterparty Name [Axis] Counterparty Name [Axis] Cumulative contributions to national pension fund. Cumulative Contributions To National Pension Fund Less: Cumulative contributions to the National Pension Fund Cumulative Effect of New Accounting Principle in Period of Adoption Impact of adopting the new revenue standard Current Fiscal Year End Date Current Fiscal Year End Date Customer Concentration Risk [Member] Customer Concentration Risk [Member] Customer Relationships [Member] Customer Relationships [Member] Debt Conversion, Converted Instrument, Shares Issued Conversion of converted notes, shares issued Debt Disclosure [Abstract] Debt Disclosure [Abstract] Debt Instrument [Axis] Debt Instrument [Axis] Long-term Debt, Gross Long-term borrowings Debt Instrument, Convertible, Conversion Price Exchange price Debt instrument convertible conversion price denomination value. Debt Instrument Convertible Conversion Price Denomination Value Convertible notes principal amount denomination value Debt Instrument, Face Amount Aggregate principal amount Debt Instrument, Fair Value Disclosure [Abstract] Long-term Borrowings: Debt Instrument, Interest Rate, Effective Percentage Conversion of exchangeable notes to common stock rate Interest rate Debt Instrument [Line Items] Debt Instrument [Line Items] Debt Instrument, Maturity Date Due date Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Senior notes pricing. Debt Instrument Pricing Aggregate principal amount of senior notes pricing Debt Instrument, Redemption, Period [Axis] Debt Instrument, Redemption, Period [Axis] Debt Instrument, Redemption, Period [Domain] Debt Instrument, Redemption, Period [Domain] Debt Instrument, Redemption, Period One [Member] 2017 [Member] Debt Instrument, Redemption, Period Two [Member] 2018 [Member] Debt Instrument, Redemption Price, Percentage Redemption price plus accrued, unpaid interest and special interest to the date of redemption Schedule of Long-term Debt Instruments [Table] Schedule of Long-term Debt Instruments [Table] Debt Instrument, Unamortized Discount Original debt issue discount Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net Less: unamortized discount and debt issuance costs Decrease in Restricted Cash Decrease in restricted cash due to release Deferred Revenue, Current Deferred revenue Deferred Revenue, Revenue Recognized Deferred revenue recognized Defined Benefit Plan Employee Retirement Age Defined Benefit Plan Employee Retirement Age Retirement age of employees Defined Benefit Plan, Expected Future Benefit Payment, Five Fiscal Years Thereafter 2024 - 2028 Defined Benefit Plan, Expected Future Benefit Payment, Next Twelve Months 2019 Defined Benefit Plan, Expected Future Benefit Payment, Remainder of Fiscal Year Remainder of 2018 Defined Benefit Plan, Expected Future Benefit Payment, Year Five 2023 Defined Benefit Plan, Expected Future Benefit Payment, Year Four 2022 Defined Benefit Plan, Expected Future Benefit Payment, Year Three 2021 Defined Benefit Plan, Expected Future Benefit Payment, Year Two 2020 Deposit Liability, Current Deposits received Depreciation Depreciation expenses Depreciation, Depletion and Amortization Depreciation and amortization Derivative Asset, Fair Value, Gross Liability Asset Derivatives, Gross amounts offset in the balance sheets Derivative Asset, Fair Value, Amount Not Offset Against Collateral [Abstract] Asset Derivatives: Derivative Asset Derivative assets Asset Derivatives, Net amounts of assets presented in the balance sheets Derivatives designated as hedging instruments, Asset Derivative, Collateral, Obligation to Return Cash Asset Derivatives, Gross amounts not offset in the balance sheets, Cash collateral pledged Derivative, Collateral, Obligation to Return Securities Asset Derivatives, Gross amounts not offset in the balance sheets, Financial instruments Derivative, Collateral, Right to Reclaim Cash Liability Derivatives, Gross amounts not offset in the balance sheets, Cash collateral pledged Derivative, Collateral, Right to Reclaim Securities Liability Derivatives, Gross amounts not offset in the balance sheets, Financial instruments Derivative Contract [Domain] Derivative Contract [Domain] Derivative Asset, Fair Value, Gross Asset Asset Derivatives, Gross amounts of recognized assets Derivative Asset, Fair Value, Amount Offset Against Collateral Asset Derivatives, Net amount Derivative Liability, Fair Value, Gross Liability Liability Derivatives, Gross amounts of recognized liabilities Derivative Liability, Fair Value, Amount Offset Against Collateral Liability Derivatives, Net amount after master netting Derivative, Inception Date Date of transaction Derivative Instrument [Axis] Derivative Instrument [Axis] Derivative Instruments and Hedging Activities Disclosure [Abstract] Derivative Instruments and Hedging Activities Disclosure [Abstract] Derivative Instruments and Hedging Activities Disclosure [Text Block] Derivative Financial Instruments Hedging Relationship [Axis] Hedging Relationship [Axis] Derivative Instruments, Gain (Loss) Reclassification from Accumulated OCI to Income, Estimated Net Amount to be Transferred Estimated amount reclassified from accumulated other comprehensive income into income Derivative Instruments, Gain (Loss) Reclassification from Accumulated OCI to Income, Estimate of Time to Transfer Estimated amount reclassified from accumulated other comprehensive income into income, period Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net Amount of Gain Reclassified from AOCI into Statement of Operations (Effective Portion) Derivative Instruments, Gain (Loss) Recognized in Income, Ineffective Portion and Amount Excluded from Effectiveness Testing, Net Amount of Gain (Loss) Recognized in Statement of Operations on Derivatives (Ineffective Portion) Derivative Liability Derivative liabilities Liability Derivatives, Net amounts of liabilities presented in the balance sheets Other current liabilities Derivative Liability, Fair Value, Gross Asset Liability Derivatives, Gross amounts offset in the balance sheets Derivative Liability, Fair Value, Amount Not Offset Against Collateral [Abstract] Liability Derivatives: Derivative [Line Items] Derivative [Line Items] Derivative, Notional Amount Total notional amount Derivative, Settlement End Date, Month Year Derivative, Settlement End Date, Month Year Month of settlement, end Derivative, Settlement Start Date, Month Year Derivative, Settlement Start Date, Month Year Month of settlement, start Derivatives, Fair Value [Line Items] Derivatives, Fair Value [Line Items] Derivative [Table] Derivative [Table] Description of Types of Cash Flow Hedging Instruments Used Type of derivative Difference between Revenue Guidance in Effect before and after Topic 606 [Member] Adjustments [Member] Disaggregation of Revenue [Abstract] Disaggregation of Revenue [Abstract] Disaggregation of Revenue [Line Items] Disaggregation of Revenue [Line Items] Disaggregation of Revenue [Table] Disaggregation of Revenue [Table] Disaggregation of Revenue [Table Text Block] Summary of Revenue Disaggregated Depending on Timing of Revenue Recognition The disclosure of display solutions. Display Solutions [Member] Display Solutions [Member] Document And Entity Information [Abstract] Document And Entity Information [Abstract] Document And Entity Information [Abstract] Document Fiscal Period Focus Document Fiscal Period Focus Document Fiscal Year Focus Document Fiscal Year Focus Document Period End Date Document Period End Date Document Type Document Type Earning Per Share [Abstract] Earning Per Share [Abstract] Earning Per Share [Abstract] Earnings Per Share [Abstract] Earnings (loss) per common share- Earnings Per Share, Basic Basic Basic earnings (loss) per share Earnings Per Share, Basic and Diluted Basic and diluted loss per share Earnings Per Share, Diluted Diluted Diluted earnings (loss) per share Earnings Per Share, Diluted [Abstract] Diluted Earnings (Loss) per Share Earnings Per Share [Line Items] Earnings Per Share [Line Items] Earnings Per Share [Line Items] Earnings Per Share [Table] Earnings Per Share [Table] Earnings Per Share [Table] Earnings Per Share [Text Block] Earnings (Loss) per Share Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent Statutory income tax rate Effect of Exchange Rate on Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents Effect of exchange rates on cash, cash equivalents and restricted cash Employee And Non Employee Stock Option [Member] Employee And Non Employee Stock Option [Member] Options [Member] Employee-related Liabilities, Current Payroll, benefits and related taxes, excluding severance benefits Employees eligible for severance benefits percentage. Employees Eligible For Severance Benefits Percentage Percentage of employees eligible for severance benefits Entity Central Index Key Entity Central Index Key Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Entity Filer Category Entity Filer Category Entity Registrant Name Entity Registrant Name Equity [Abstract] Equity [Abstract] Equity Component [Domain] Equity Component [Domain] Estimate of Fair Value Measurement [Member] Estimate of Fair Value Measurement [Member] Europe [Member] Europe [Member] Exchangeable Debt [Member] Exchangeable Notes [Member]