Balance Sheet Related Disclosures [Abstract] Schedule of Finite-Lived Intangible Assets [Table] Schedule of Finite-Lived Intangible Assets [Table] Finite-Lived 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] Patents Patents [Member] Developed core technology Developed Technology Rights [Member] Patent license agreement Licensing Agreements [Member] Finite-Lived Intangible Assets [Line Items] Finite-Lived Intangible Assets [Line Items] Schedule of intangible assets Finite-Lived Intangible Assets, Gross [Abstract] Gross Carrying Value Finite-Lived Intangible Assets, Gross Accumulated Amortization Finite-Lived Intangible Assets, Accumulated Amortization Net Carrying Value Finite-Lived Intangible Assets, Net Statement of Financial Position [Abstract] Trade and other accounts receivable, allowance Allowance for Doubtful Accounts Receivable, Current Common stock, par value Common Stock, Par or Stated Value Per Share Common stock, shares authorized Common Stock, Shares Authorized Common stock, shares issued Common Stock, Shares, Issued Common stock, shares outstanding Common Stock, Shares, Outstanding Schedule of inventories Inventory, Net [Abstract] Raw material and purchased parts Inventory, Raw Materials, Gross Work-in-process Inventory, Work in Process, Gross Finished goods Inventory, Finished Goods, Gross Cost of Inventory Shipped Cost of Inventory Shipped Cost of Inventory Shipped Total inventories Inventory, Net Defined Benefit Pension Plans and Defined Benefit Postretirement Plans Disclosure [Abstract] Defined Benefit Plan (Textual) [Abstract] Defined Benefit Plan (Textual) [Abstract] Defined benefit plan. Employer contributions Defined Benefit Plan, Contributions by Employer Additional employer contributions, expected to be paid during the remainder of fiscal year Defined Benefit Plans, Estimated Future Employer Contributions in Current Fiscal Year Schedule of accrued warranty Movement in Standard and Extended Product Warranty, Increase (Decrease) [Roll Forward] Beginning balance Product Warranty Accrual Product warranties issued Product Warranty Accrual, Warranties Issued Settlement of warranties Product Warranty Accrual, Payments Change related to preexisting warranties Product Warranty Accrual, Preexisting, Increase (Decrease) Ending balance Product Warranty Accrual, Currency Translation, Increase (Decrease) Product Warranty Accrual, Currency Translation, Increase (Decrease) ASSETS Assets [Abstract] Current assets : Assets, Current [Abstract] Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Restricted cash Restricted Cash and Cash Equivalents, Current Trade and other accounts receivable, net of allowance for doubtful accounts of $159 and $134, at June 30, 2014 and December 31, 2013, respectively Accounts Receivable, Net, Current Inventories Prepaid expenses and other current assets Prepaid Expense and Other Assets, Current Total current assets Assets, Current Property and equipment, net Property, Plant and Equipment, Net Intangible assets, net Intangible Assets, Net (Excluding Goodwill) Goodwill Goodwill Pension asset Defined Benefit Plan, Funded Status of Plan Other non-current assets Other Assets, Noncurrent Total assets Assets LIABILITIES AND STOCKHOLDERS' EQUITY Liabilities and Equity [Abstract] Current liabilities: Liabilities, Current [Abstract] Accounts payable and accrued liabilities Accounts Payable and Accrued Liabilities, Current Accrued warranty Product Warranty Accrual, Current Accrued employee compensation Employee-related Liabilities, Current Deferred revenue and customer deposits Deferred Revenue and Credits Short-term borrowings and current portion of long-term debt Debt, Current Deferred tax liability Deferred Tax Liabilities, Net, Current Total current liabilities Liabilities, Current Deferred tax liability, long-term Deferred Tax Liabilities, Net, Noncurrent Long-term debt, excluding current portion Long-term Debt, Excluding Current Maturities Other long-term liabilities Other Liabilities, Noncurrent Total liabilities Liabilities Commitments and contingencies (Note 8) Commitments and Contingencies Stockholders' equity: Stockholders' Equity Attributable to Parent [Abstract] Common stock, $0.10 par value per share, 40,000 shares authorized; 29,897 and 29,563 shares issued and outstanding at June 30, 2014 and December 31, 2013, respectively Common Stock, Value, Issued Additional paid-in capital Additional Paid in Capital Accumulated deficit Retained Earnings (Accumulated Deficit) Accumulated other comprehensive income Accumulated Other Comprehensive Income (Loss), Net of Tax Total stockholders' equity Stockholders' Equity Attributable to Parent Total liabilities and stockholders' equity Liabilities and Equity Schedule of inventories Schedule of Inventory, Current [Table Text Block] Schedule of intangible assets Schedule of Finite-Lived Intangible Assets [Table Text Block] Schedule of change in the carrying amount of goodwill Schedule of Goodwill [Table Text Block] Schedule of accrued warranty Schedule of Product Warranty Liability [Table Text Block] Schedule of accumulated other comprehensive income Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Debt Disclosure [Abstract] Credit Facility Debt Disclosure [Text Block] Commitments and Contingencies Disclosure [Abstract] Legal Proceedings Legal Matters and Contingencies [Text Block] Foreign Currency Derivatives [Abstract] Foreign Currency Derivative Instruments Derivative Instruments and Hedging Activities Disclosure [Text Block] Statement of Comprehensive Income [Abstract] Tax benefit (provision) for amortization of deferred loss Other Comprehensive (Income) Loss, Reclassification Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, for Net (Gain) Loss, Tax Tax benefit (provision) for amortization of prior service cost Other Comprehensive Income (Loss), Amortization Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, for Net Prior Service (Cost) Credit, Tax Schedule of Defined Benefit Plans Disclosures [Table] Schedule of Defined Benefit Plans Disclosures [Table] Income Statement Location [Axis] Income Statement Location [Axis] Income Statement Location [Domain] Income Statement Location [Domain] Selling, General and Administrative Expenses Selling, General and Administrative Expenses [Member] Defined Benefit Plans and Other Postretirement Benefit Plans [Axis] Defined Benefit Plans and Other Postretirement Benefit Plans [Axis] Defined Benefit Plans and Other Postretirement Benefit Plans [Domain] Defined Benefit Plan and Other Postretirement Benefit Plan [Domain] Foreign Currency Translation Adjustment [Member] Foreign Currency Translation Adjustment [Member] Foreign currency translation adjustment. Defined Benefit Pension Plan [Member] Pension Plan, Defined Benefit [Member] Defined Benefit Plan Disclosure [Line Items] Defined Benefit Plan Disclosure [Line Items] Schedule of accumulated other comprehensive income Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract] Balance as of December 31, 2013 Other comprehensive loss before reclassification Other Comprehensive Income (Loss), before Reclassifications, Net of Tax Amounts reclassified from accumulated other comprehensive income (loss) Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax Net other comprehensive income (loss) for three months ended June 30, 2014 Other Comprehensive Income (Loss), Net of Tax Balance as of June 30, 2014 Derivative Instruments, Gain (Loss) by Hedging Relationship, by Income Statement Location [Table] Derivative Instruments, Gain (Loss) [Table] Cost of Sales [Member] Cost of Sales [Member] Derivative Instruments Gain (Loss) [Line Items] Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] Schedule of foreign currency gains and losses on underlying assets and liabilities Effect of Fair Value Hedges on Results of Operations [Abstract] Net gains (loss) on foreign currency forward contracts were partially offset on assets and liabilities Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge Stock Offering [Abstract] Stock offering. Stock Offering (Textual) [Abstract] Stock Offering (Textual) [Abstract] Stock offering. Value of Securities Permitted to be Issued Under Shelf Registration Value of Securities Permitted to be Issued Under Shelf Registration Value of securities permitted to be issued under shelf registration. Organization, Consolidation and Presentation of Financial Statements [Abstract] Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Antidilutive Securities Excluded from Computation of Earnings Per Share, by Antidilutive Securities [Axis] Antidilutive Securities [Axis] Antidilutive Securities Name [Domain] Antidilutive Securities, Name [Domain] Outstanding options to purchase common stock Employee Stock Option [Member] Restricted Stock Awards Restricted Stock [Member] Restricted Stock Unit Restricted Stock Units (RSUs) [Member] Employee Stock Purchase Plan Employee Stock [Member] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Schedule of instruments convertible into common shares that are not included in the denominator used in the diluted net income (loss) per share calculation because to do so would be anti-dilutive Schedule of antidilutive securities excluded from computation of earnings per share [Abstract] Schedule of antidilutive securities excluded from computation of earnings per share. Anti-dilutive, shares Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Share-based Compensation [Abstract] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Title of Individual [Axis] Title of Individual [Axis] Title of Individual with Relationship to Entity [Domain] Relationship to Entity [Domain] Chief Financial Officer [Member] Chief Financial Officer [Member] Director [Member] Director [Member] Service Based Restricted Stock [Member] Service Based Restricted Stock [Member] Service-based restricted stock. Performance Based Restricted Stock [Member] Performance Based Restricted Stock [Member] Performance-based restricted stock. Award Type [Axis] Award Type [Axis] Award Type [Domain] Equity Award [Domain] Restricted stock unit awards Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Stock Plans (Textual) [Abstract] Stock Plans (Textual) [Abstract] Stock plans. Stock-based compensation plans Number of Active Stock Based Compensation Plans Number of active stock based compensation plans. Stock-based compensation expense Share-based Compensation Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross Restricted stock granted Stock Issued During Period, Shares, Restricted Stock Award, Gross Restricted stock unit, granted Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period Restricted stock, average grant date fair value per share Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value Discount rate from market value on offering date Share-based Compensation Arrangement by Share-based Payment Award, Discount from Market Price, Offering Date Restricted stock unit vesting period (in years) Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period Net income (loss) Net Income (Loss) Attributable to Parent Other comprehensive income (loss), net of tax: Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent [Abstract] Foreign currency translation adjustment Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax Defined benefit pension plan, net of tax: Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax [Abstract] Amortization of deferred loss, net of tax benefit of $7 for the three months ended June 30, 2013; net of tax benefit of $14 for the six months ended June 30, 2013 respectively Other Comprehensive (Income) Loss, Reclassification Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, for Net (Gain) Loss, Net of Tax Amortization of prior service cost, net of tax benefit of $7 and $2 for the three months ended June 30, 2014 and 2013, respectively; net of tax benefit of $14 and $4 for the six months ended June 30, 2014 and 2013, respectively Other Comprehensive Income (Loss), Amortization Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, for Net Prior Service (Cost) Credit, Net of Tax Other comprehensive income (loss), net of tax Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent Comprehensive income (loss) Comprehensive Income (Loss), Net of Tax, Attributable to Parent 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 Document Period End Date Document Period End Date Amendment Flag Amendment Flag Document Fiscal Year Focus Document Fiscal Year Focus Document Fiscal Period Focus Document Fiscal Period Focus Trading Symbol Trading Symbol Current Fiscal Year End Date Current Fiscal Year End Date Entity Filer Category Entity Filer Category Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Financial Statement Presentation Consolidation, Policy [Policy Text Block] Reclassification, Policy Reclassification, Policy [Policy Text Block] Use of Estimates Use of Estimates, Policy [Policy Text Block] Income Tax Disclosure Income Tax, Policy [Policy Text Block] Cash and Cash Equivalents, Restricted Cash Cash and Cash Equivalents, Restricted Cash and Cash Equivalents, Policy [Policy Text Block] Warranty Obligation Standard Product Warranty, Policy [Policy Text Block] Revenue Recognition Revenue Recognition, Policy [Policy Text Block] Net Income (Loss) per Share Earnings Per Share, Policy [Policy Text Block] Derivatives and Hedging Derivatives, Policy [Policy Text Block] Fair Value Measurements and Disclosures Fair Value Measurement, Policy [Policy Text Block] Statement of Cash Flows [Abstract] OPERATING ACTIVITIES: Net Cash Provided by (Used in) Operating Activities [Abstract] Net income (loss) 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 Depreciation Amortization of intangible assets Amortization of Intangible Assets Amortization of debt discount and prepaid debt costs Amortization of Financing Costs and Discounts Pension cost (benefit) Defined Benefit Plan, Net Periodic Benefit Cost Provision for losses on accounts receivable Provision for Doubtful Accounts Provision for losses on inventory Inventory Write-down Provision for warranties Product Warranty Expense Changes in operating assets and liabilities: Increase (Decrease) in Operating Capital [Abstract] Trade and other accounts receivable Increase (Decrease) in Accounts and Other Receivables Inventories Increase (Decrease) in Inventories Prepaid expenses and other assets Increase (Decrease) in Prepaid Expense and Other Assets Pension asset Increase (Decrease) in Pension Plan Obligations Accounts payable and accrued liabilities Increase (Decrease) in Accounts Payable and Accrued Liabilities Deferred revenue and customer deposits Increase (Decrease) in Deferred Revenue and Customer Advances and Deposits Accrued employee compensation Increase (Decrease) in Employee Related Liabilities Deferred tax liability, long term Increase Decrease in Deferred Tax Liability Long Term Increase decrease in deferred tax liability long term. Other long-term liabilities Increase (Decrease) in Other Operating Liabilities Net cash provided by (used in) 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 Restricted cash Increase (Decrease) in Restricted Cash 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] Principal payments on long-term debt and short-term borrowings Repayments of Bank Debt Proceeds from long-term and short-term borrowings Proceeds from Bank Debt Repurchase of shares Payments for Repurchase of Common Stock Proceeds from issuance of common stock under equity compensation plans Proceeds from Issuance of Shares under Incentive and Share-based Compensation Plans, Excluding Stock Options restricted cash - compensating balance restricted cash - compensating balance The net cash inflow or outflow for the increase (decrease) associated with funds that are not available for withdrawal or use (such as funds held in escrow) and are associated with underlying transactions that are classified as investing activities. Net cash provided by (used in) financing activities Net Cash Provided by (Used in) Financing Activities Increase (decrease) in cash and cash equivalents from operations Cash and Cash Equivalents, Period Increase (Decrease), Excluding Exchange Rate Effect Effect of exchange rate changes on cash and cash equivalents Effect of Exchange Rate on Cash and Cash Equivalents 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 Plan Name [Axis] Plan Name [Axis] Plan Name [Domain] Plan Name [Domain] Employee Stock [Member] Schedule of employee stock purchase plan weighted-average assumptions Schedule of Share-based Payment Award, Employee Stock Purchase Plan, Valuation Assumptions [Table Text Block] Schedule of stock-based compensation expense Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table Text Block] Schedule of stock-based compensation expense Schedules of Restricted Stock Award Expense by Performance Based and Service Based Vesting [Table Text Block] Schedules of restricted stock award expense by performance based and service based vesting. Loss Contingencies [Table] Loss Contingencies [Table] Litigation Case [Axis] Litigation Case [Axis] Litigation Case Type [Domain] Litigation Case [Domain] Loss Contingencies [Line Items] Loss Contingencies [Line Items] Fair Value Disclosures [Abstract] Fair Value Measurements Fair Value, Measurement Inputs, Disclosure [Text Block] Foreign Currency Derivative Instruments (Textual) [Abstract] Foreign Currency Derivative Instruments (Textual) [Abstract] Foreign currency derivative instruments. Notional amount of foreign currency forward contracts not designated as hedges Derivative, Notional Amount Derivative Instruments, Gain (Loss) [Line Items] Derivative Instruments, Gain (Loss) [Line Items] Schedule of gains (losses) on foreign currency forward contracts Foreign Currency Derivative Instruments Not Designated as Hedging Instruments at Fair Value, Net [Abstract] Net gains (loss) on foreign currency forward contracts Gain (Loss) on Foreign Currency Derivative Instruments Not Designated as Hedging Instruments Shelf Registration Statement [Abstract] Shelf Registration Statement [Abstract] Shelf Registration Statement Shelf Registration Statement [Text Block] Text Block] for Shelf Registration Statement Balance Sheet Details Supplemental Balance Sheet Disclosures [Text Block] Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Grant Date Intrinsic Value Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Grant Date Intrinsic Value Schedule of stock options and employee stock purchase plan weighted-average assumptions Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract] Expected dividends Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate Exercise price Share based compensation arrangement by share based payment award fair value assumption exercise price Share based compensation arrangement by share based payment award fair value assumption exercise price. Expected volatility Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate Average risk-free interest rate Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate Expected life/term (in years) Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term Fair value per share Schedule of Long-term Debt Instruments [Table] Schedule of Long-term Debt Instruments [Table] Restricted Cash and Cash Equivalents [Axis] Restricted Cash and Cash Equivalents [Axis] Cash and Cash Equivalents [Domain] Cash and Cash Equivalents [Domain] Collateral for Borrowing [Member] Collateral for Borrowing [Member] Collateral for Borrowing [Member] Debt Instrument [Axis] Debt Instrument [Axis] Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Revolving Credit Facility [Member] Revolving Credit Facility [Member] Equipment Term Loan [Member] Equipment Term Loan [Member] Equipment Term Loan [Member] Variable Rate [Axis] Variable Rate [Axis] Variable Rate [Domain] Variable Rate [Domain] London Interbank Offered Rate (LIBOR) [Member] London Interbank Offered Rate (LIBOR) [Member] Credit Facility [Axis] Credit Facility [Axis] Credit Facility [Domain] Credit Facility [Domain] Revolving Credit Facility [Member] Secured Debt [Member] Secured Debt [Member] Debt Instrument [Line Items] Debt Instrument [Line Items] Revolving line of credit Line of Credit Facility, Maximum Borrowing Capacity Line of Credit Facility, Required Pledge of Equity Interests in Subsidiary, Percent Line of Credit Facility, Required Pledge of Equity Interests in Subsidiary, Percent Line of Credit Facility, Required Pledge of Equity Interests in Subsidiary, Percent Borrowings under credit facility, interest payable description Debt Instrument, Description of Variable Rate Basis Borrowings under credit facility, interest related to Libor rate Debt Instrument, Basis Spread on Variable Rate Equipment term loan number of payments Debt Instrument, Term Equipment term loan, interest rate Debt Instrument, Interest Rate at Period End Line of Credit Facility, Unused Capacity, Commitment Fee Percentage Line of Credit Facility, Unused Capacity, Commitment Fee Percentage Proceeds from Issuance of Debt Proceeds from Issuance of Debt Short-term Debt Short-term Debt Long-term Debt Long-term Debt Stock Options Restricted Stock [Member] Schedule of computation of basic and diluted net income (loss) per share Earnings Per Share, Basic and Diluted [Abstract] Net income Effect of assumed conversion of convertible debentures Dilutive Securities, Effect on Basic Earnings Per Share [Abstract] Weighted-average common shares outstanding Weighted Average Number of Shares Outstanding, Basic Effect of potentially dilutive securities Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements Weighted-average common shares outstanding, assuming dilution Weighted Average Number of Shares Outstanding, Diluted Net income per share Earnings Per Share [Abstract] Basic Earnings Per Share, Basic Diluted Earnings Per Share, Diluted Schedule of components of net periodic pension income Schedule of Net Benefit Costs [Table Text Block] Description of Business and Basis of Presentation Business Description and Basis of Presentation [Text Block] Fair Value Measurements (Textual) [Abstract] Fair Value Measurements (Textual) [Abstract] Fair value measurements. Fair value of derivatives Foreign Currency Derivative Instruments Not Designated as Hedging Instruments, Asset at Fair Value Foreign Currency [Abstract] Derivative Asset, Fair Value, Gross Asset Derivative Asset, Fair Value, Gross Asset Derivative Liability, Fair Value, Gross Asset Derivative Liability, Fair Value, Gross Asset Derivative Asset Derivative Asset Income Statement [Abstract] Revenue Revenue, Net Cost of revenue Cost of Goods and Services Sold Gross profit Gross Profit Operating expenses: Operating Expenses [Abstract] Selling, general and administrative Selling, General and Administrative Expense Research and development Research and Development Expense Total operating expenses Operating Expenses Income (loss) from operations Operating Income (Loss) Interest expense, net Interest Income (Expense), Nonoperating, Net Amortization of debt discount and prepaid debt costs Income (loss) from operations before income taxes Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest Income tax provision Income Tax Expense (Benefit) Net income (loss) per share: Weighted average common shares outstanding: Weighted Average Number of Shares Outstanding, Diluted [Abstract] Basic Diluted Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table] Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table] Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs, by Report Line [Axis] Employee Service Share Based Compensation Allocation Of Recognized Period Costs Report Line [Domain] Service-based restricted stock [Member] Performance-based restricted stock [Member] Cost of revenue Research and development [Member] Research and Development Expense [Member] Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] Schedule of stock-based compensation expense Employee Service Based Compensation Allocation Of Recognized Period Cost [Abstract] Employee service based compensation allocation of recognized period cost. Share-based Compensation Allocated Share-based Compensation Expense Allocated Share-based Compensation Expense Schedule of components of net periodic pension income Defined Benefit Plan, Net Periodic Benefit Cost [Abstract] Service cost Defined Benefit Plan, Service Cost Interest cost Defined Benefit Plan, Interest Cost Expected return on plan assets Defined Benefit Plan, Expected Return on Plan Assets Prior service cost amortization Defined Benefit Plan, Amortization of Prior Service Cost (Credit) Deferred loss amortization Defined Benefit Plan, Amortization of Gains (Losses) Net periodic pension income Schedule of gains (losses) on foreign currency forward contracts Derivative Instruments, Gain (Loss) [Table Text Block] Schedule of foreign currency gains and losses on underlying assets and liabilities Schedule of Foreign Currency Gains and Losses on Underlying Assets and Liabilities Included in Cost of Revenue and Selling General and Administrative Expense [Table Text Block] Schedule of foreign currency gains and losses on underlying assets and liabilities included in cost of revenue and selling, general and administrative expense. Offsetting Liabilities Offsetting Liabilities [Table Text Block] Stock Plans Disclosure of Compensation Related Costs, Share-based Payments [Text Block] Defined Benefit Plan Pension and Other Postretirement Benefits Disclosure [Text Block] Description of Business and Basis of Presentation [Table] Description of Business and Basis of Presentation [Table] Description Of Business And Basis Of Presentation [Table] Deferred Revenue and Customer Deposits [Axis] Deferred Revenue and Customer Deposits [Axis] Deferred Revenue and Customer Deposits [Axis] Deferred Revenue and Customer Deposits [Domain] Deferred Revenue and Customer Deposits [Domain] [Domain] for Deferred Revenue and Customer Deposits [Axis] Description of Business and Basis of Presentation [Line Items] Description of Business and Basis of Presentation [Line Items] Description of business and basis of presentation. Deferred Tax Assets, Valuation Allowance Deferred Tax Assets, Valuation Allowance Deferred Revenue, Additions Deferred Revenue, Additions Description of Business and Basis of Presentation (Textual) [Abstract] Description of Business and Basis of Presentation (Textual) [Abstract] Description of business and basis of presentation. Manufacturing locations Manufacturing Locations Manufacturing locations. Operating segments Number of Operating Segments Warranty period, minimum, in years Standard Product Warranty, Term, Minimum Standard Product Warranty, Term, Minimum Warranty period, maximum, in years Standard Product Warranty, Term, Maximum Standard Product Warranty, Term, Maximum Schedule of computation of basic and diluted net income (loss) per share Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Schedule of instruments convertible into common shares that are not included in the denominator used in the diluted net income (loss) per share calculation because to do so would be anti-dilutive Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block] Schedule of change in the carrying amount of goodwill Goodwill [Roll Forward] Balance at December 31, 2013 Foreign currency translation adjustments Goodwill, Translation Adjustments Balance at June 30, 2014