Inventory Disclosure [Abstract] Schedule of inventory Inventory, Net [Abstract] Raw materials Inventory, Raw Materials, Gross Finished goods Inventory, Finished Goods, Gross Total inventory Inventory, Net Commitments and Contingencies Disclosure [Abstract] COMMITMENTS AND CONTINGENCIES Commitments and Contingencies Disclosure [Text Block] Earnings Per Share [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 [Axis] Antidilutive Securities [Axis] Antidilutive Securities, Name [Domain] Antidilutive Securities, Name [Domain] Employee stock options Employee Stock Option [Member] Restricted stock units Restricted Stock Units (RSUs) [Member] Warrants to purchase common stock Warrant [Member] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] The potential common shares outstanding that were excluded from the computation of diluted net loss per share attributable to common stockholders Antidilutive Securities [Abstract] Antidilutive securities. Total Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Disclosure of Compensation Related Costs, Share-based Payments [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] Award Type [Axis] Award Type [Axis] Award Type [Domain] Equity Award [Domain] Restricted stock Restricted Stock [Member] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Fair value of options exercised during period Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercised in Period, Fair Value Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercised in Period, Fair Value Intrinsic value of options outstanding Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value Fair value of stock vested during period Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value Intrinsic value of restricted stock units outstanding Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Intrinsic Value, Value Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Intrinsic Value, Value Total unrecognized compensation cost Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized Weighted-average recognition period for unrecognized compensation cost Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition Restricted stock units Restricted Stock Units Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] Outstanding at December 31, 2013 (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number Granted (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period Vested (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period Canceled (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period Outstanding at March 31, 2014 (in shares) Weighted Average Fair Value per Share at Grant Date Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract] Outstanding at December 31, 2013 (in usd per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value Granted (in usd 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 Vested (in usd per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value Canceled (in usd per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value Outstanding at March 31, 2014 (in usd per share) Long-term Debt, by Current and Noncurrent [Abstract] Schedule of Long-term Debt Instruments [Table] Schedule of Long-term Debt Instruments [Table] Lender Name [Axis] Lender Name [Axis] Line of Credit Facility, Lender [Domain] Line of Credit Facility, Lender [Domain] Wells Fargo Bank Wells Fargo Bank [Member] Wells Fargo Bank. Hercules Technology Growth Capital Inc Hercules Technology Growth Capital Inc [Member] Hercules Technology Growth Capital, Inc. Long-term Debt, Type [Axis] Long-term Debt, Type [Axis] Long-term Debt, Type [Domain] Long-term Debt, Type [Domain] Revolving credit facility Revolving Credit Facility [Member] Secured debt Secured Debt [Member] Equipment financing facility Equipment Financing Facility [Member] Equipment financing facility. Debt Instrument [Line Items] Debt Instrument [Line Items] Number of debt agreements Line of Credit, Number of Debt Agreements Line of Credit, Number of Debt Agreements Credit line facility Line of Credit Facility, Maximum Borrowing Capacity Initial draw under credit line arrangement Proceeds from Issuance of Debt Incremental line of credit amount Line of Credit Facility, Current Borrowing Capacity Amount of undrawn credit for debt compliance Amount of Undrawn Credit for Debt Compliance Amount of Undrawn Credit for Debt Compliance Amount of liquidity required for debt compliance Amount of Liquidity Required for Debt Compliance Amount of Liquidity Required for Debt Compliance Undrawn incremental line of credit expired during period Line of Credit Facility, Borrowing Capacity, Expired Line of Credit Facility, Borrowing Capacity, Expired Outstanding principal balance Line of Credit Facility, Amount Outstanding Organization, Consolidation and Presentation of Financial Statements [Abstract] Accounting Policies [Table] Accounting Policies [Table] Accounting Policies [Table] Range [Axis] Range [Axis] Range [Domain] Range [Domain] Maximum Maximum [Member] Products and Services [Axis] Products and Services [Axis] Products and Services [Domain] Products and Services [Domain] Prior to December 31, 2013 Microinverter Warranties Issued in Period One [Member] Microinverter Warranties Issued in Period One [Member] Subsequent to December 31, 2013 Microinverter Warranties Issued in Period Two [Member] Microinverter Warranties Issued in Period Two [Member] Eligible Item or Group for Fair Value Option [Axis] Eligible Item or Group for Fair Value Option [Axis] Fair Value, Option, Eligible Item or Group [Domain] Fair Value, Option, Eligible Item or Group [Domain] Warranty obligations, fair value option Warranty, Rights and Obligations, Fair Value Option [Member] Accounting Policies [Line Items] Accounting Policies [Line Items] [Line Items] for Accounting Policies [Table] Product warranty term Product Warranty, Term Product Warranty Term Warranty obligation Product Warranty Accrual NET LOSS PER SHARE Earnings Per Share [Text Block] Fair Value Disclosures [Abstract] FAIR VALUE OF FINANCIAL INSTRUMENTS Fair Value Disclosures [Text Block] 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] Income Statement Location [Axis] Employee Service Share-based Compensation, Allocation of Recognized Period Costs, Report Line [Domain] Income Statement Location [Domain] Cost of revenues Cost of Sales [Member] Research and development Research and Development Expense [Member] Sales and marketing Selling and Marketing Expense [Member] General and administrative General and Administrative Expense [Member] Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] Allocation of Stock-based Compensation Expense Included in the Consolidated Statement of Operations [Abstract] Share-based Compensation, Allocation and Classification in Financial Statements [Abstract] Total stock-based compensation expense Allocated Share-based Compensation Expense Statement of Financial Position [Abstract] Statement [Table] Statement [Table] Scenario [Axis] Scenario [Axis] Scenario, Unspecified [Domain] Scenario, Unspecified [Domain] Statement [Line Items] Statement [Line Items] ASSETS Assets [Abstract] Current assets: Assets, Current [Abstract] Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Accounts receivable, net of allowances of $2,026 and $2,000 Accounts Receivable, Net, Current Inventory Prepaid expenses and other Prepaid Expense and Other Assets, Current Total current assets Assets, Current Property and equipment, net Property, Plant and Equipment, Net Other assets Other Assets, Noncurrent Total assets Assets LIABILITIES AND STOCKHOLDERS’ EQUITY Liabilities and Equity [Abstract] Current liabilities: Liabilities, Current [Abstract] Accounts payable Accounts Payable, Current Accrued liabilities Accrued Liabilities, Current Deferred revenues Deferred Revenue, Current Warranty obligations, current portion (includes $126 and $0 measured at fair value at March 31, 2014 and December 31, 2013, respectively) Product Warranty Accrual, Current Term loans, current portion Loans Payable, Current Total current liabilities Liabilities, Current Long-term liabilities: Liabilities, Noncurrent [Abstract] Deferred revenues, noncurrent Deferred Revenue, Noncurrent Warranty obligations, noncurrent (includes $461 and $0 measured at fair value at March 31, 2014 and December 31, 2013, respectively) Product Warranty Accrual, Noncurrent Other liabilities Other Liabilities, Noncurrent Term loans, noncurrent Loans Payable, Noncurrent Total liabilities Liabilities Commitments and contingencies Commitments and Contingencies Stockholders’ equity: Stockholders' Equity Attributable to Parent [Abstract] Preferred stock, $0.00001 par value, 10,000 shares authorized; none issued and outstanding Preferred Stock, Value, Issued Common stock, $0.00001 par value, 100,000 shares authorized; 42,354 and 42,123 shares issued and outstanding as of March 31, 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 Overview and Summary of Significant Accounting Policies Organization, Consolidation and Presentation of Financial Statements Disclosure and Significant Accounting Policies [Text Block] Fair Value Inputs, Liabilities, Quantitative Information [Table] Fair Value Inputs, Liabilities, Quantitative Information [Table] Liability Class [Axis] Liability Class [Axis] Fair Value by Liability Class [Domain] Fair Value by Liability Class [Domain] Warranty obligations for microinverters sold since January 1, 2014 Valuation Technique [Axis] Valuation Technique [Axis] Valuation Technique [Domain] Valuation Technique [Domain] Discounted cash flows Income Approach Valuation Technique [Member] Fair Value, Hierarchy [Axis] Fair Value, Hierarchy [Axis] Fair Value Hierarchy [Domain] Fair Value Hierarchy [Domain] Level 3 Fair Value, Inputs, Level 3 [Member] Fair Value Inputs, Liabilities, Quantitative Information [Line Items] Fair Value Inputs, Liabilities, Quantitative Information [Line Items] Fair Value Inputs [Abstract] Fair Value Inputs [Abstract] Profit element and risk premium Fair Value Inputs, Profit Element and Risk Premium Fair Value Inputs, Profit Element and Risk Premium Credit-adjusted risk-free rate (discount rate) Fair Value Inputs, Discount Rate Derivative [Table] Derivative [Table] Hedging Designation [Axis] Hedging Designation [Axis] Hedging Designation [Domain] Hedging Designation [Domain] Not designated as hedging instrument Not Designated as Hedging Instrument [Member] Derivative Instrument Risk [Axis] Derivative Instrument [Axis] Derivative Contract Type [Domain] Derivative Contract [Domain] Foreign exchange forward Foreign Exchange Forward [Member] Derivative [Line Items] Derivative [Line Items] Net gain on foreign currency Gain (Loss) on Foreign Currency Derivative Instruments Not Designated as Hedging Instruments Term loans Equipment financing facility, net of unamortized discount of $16 and $31, respectively Schedule of long-term debt Long-term Debt, Current and Noncurrent [Abstract] Total term loans Long-term Debt Less current portion Long-term Debt, Current Maturities Term loans, noncurrent Long-term Debt, Excluding Current Maturities Unamortized discount Debt Instrument, Unamortized Discount Income Statement [Abstract] Net revenues Revenue, Net Cost of revenues Cost of Revenue Gross profit Gross Profit Operating expenses: Operating Expenses [Abstract] Research and development Research and Development Expense Sales and marketing Selling and Marketing Expense General and administrative General and Administrative Expense Total operating expenses Operating Expenses Loss from operations Income (Loss) from Continuing Operations Attributable to Parent Other income (expense), net: Other Nonoperating Income (Expense) [Abstract] Interest expense Interest Expense Other income (expense) Other Nonoperating Income (Expense) Total other expense, net Nonoperating Income (Expense) Loss before income taxes Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest Provision for income taxes Income Tax Expense (Benefit) Net loss Net Income (Loss) Attributable to Parent Net loss per share attributable to common stockholders, basic and diluted (usd per share) Income (Loss) from Continuing Operations, Per Basic and Diluted Share Shares used in computing net loss per share, basic and diluted Weighted Average Number of Shares Outstanding, Basic and Diluted Numerator: Net Income (Loss) Attributable to Parent [Abstract] Net loss Denominator: Weighted Average Number of Shares Outstanding, Diluted [Abstract] Weighted average number of common shares outstanding Net loss per share, basic and diluted Earnings Per Share, Basic and Diluted Number of Shares Outstanding Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] Outstanding at December 31, 2013 (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number Granted (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross Exercised (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period Canceled (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period Outstanding at March 31, 2014 (in shares) Weighted- Average Exercise Price per Share Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract] Outstanding at December 31, 2013 (in usd per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price Granted (in usd per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price Exercised (in usd per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price Canceled (in usd per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period, Weighted Average Exercise Price Outstanding at March 31, 2014 (in usd per share) Schedule of long-term debt Schedule of Long-term Debt Instruments [Table Text Block] Statement of Cash Flows [Abstract] Cash flows from operating activities: Net Cash Provided by (Used in) Operating Activities [Abstract] Adjustments to reconcile net loss to net cash used in operating activities: Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Depreciation and amortization Depreciation, Depletion and Amortization Provision for doubtful accounts Provision for Doubtful Accounts Net loss on disposal of assets Gain (Loss) on Disposition of Other Assets Non-cash interest expense Amortization of Financing Costs and Discounts Stock-based compensation Share-based Compensation Changes in operating assets and liabilities: Increase (Decrease) in Operating Assets [Abstract] Accounts receivable Increase (Decrease) in Accounts Receivable Inventory Increase (Decrease) in Inventories Prepaid expenses and other assets Increase (Decrease) in Prepaid Expense and Other Assets Accounts payable, accrued compensation and other accrued liabilities Increase (Decrease) in Accounts Payable and Accrued Liabilities Warranty obligations Increase (Decrease) in Product Warranty Accrual Increase (Decrease) in Product Warranty Accrual Deferred revenues Increase (Decrease) in Deferred Revenue 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] Repayments of term loans Repayments of Long-term Debt Principal payments under capital leases Repayments of Long-term Capital Lease Obligations Proceeds from issuance of common stock under employee stock plans Proceeds from Issuance of Shares under Incentive and Share-based Compensation Plans, Including Stock Options 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 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 Supplemental disclosures of non-cash investing and financing activities: Supplemental Cash Flow Information [Abstract] Purchases of property and equipment included in accounts payable Capital Expenditures Incurred but Not yet Paid STOCK-BASED COMPENSATION Disclosure of Compensation Related Costs, Share-based Payments [Text Block] INVENTORY Inventory Disclosure [Text Block] Income Tax Disclosure [Abstract] INCOME TAXES Income Tax Disclosure [Text Block] Schedule of financial instruments that are measured at fair value on a recurring basis Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] Schedule of warranty obligations measured at fair value on a recurring basis Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] Schedule of significant unobservable inputs used in the fair value measurement of the Company's warranty obligations designated as Level 3 Fair Value Inputs, Liabilities, Quantitative Information [Table Text Block] Basis of Presentation, Consolidation and Related Party Transactions Basis of Accounting, Policy [Policy Text Block] Reclassifications Comparability of Prior Year Financial Data, Policy [Policy Text Block] Unaudited Interim Financial Information Condensed Financial Statements, Policy [Policy Text Block] Condensed Financial Statements, Policy [Policy Text Block] Use of Estimates Use of Estimates, Policy [Policy Text Block] Fair Value Option for Microinverters Sold Since January 1, 2014 Fair Value Option For Standard Product Warranty, Policy [Policy Text Block] Fair Value Option For Standard Product Warranty, Policy [Policy Text Block] Statement of Comprehensive Income [Abstract] Net loss Other comprehensive (loss) income: Other Comprehensive Income (Loss), Net of Tax [Abstract] Foreign currency translation adjustments Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss) Arising During Period, Net of Tax Comprehensive loss Comprehensive Income (Loss), Net of Tax, Attributable to Parent Product Warranties Disclosures [Abstract] Changes in the Company's product warranty liability Movement in Standard and Extended Product Warranty, Increase (Decrease) [Roll Forward] Warranty obligations, beginning of period Accruals for warranties issued during period Standard Product Warranty Accrual, Warranties Issued Changes in estimates Product Warranty Accrual, Preexisting, Increase (Decrease) Settlements Standard Product Warranty Accrual, Payments Increase due to accretion expense Product Warranty Accrual, Accretion Expense Product Warranty Accrual, Accretion Expense Other Product Warranty Accrual, Other Product Warranty Accrual, Other Warranty obligations, end of period Less current portion Noncurrent Stock options The fair value of each option granted during the periods Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract] Expected term Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term Expected volatility Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate Annual risk-free rate of return Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate Dividend yield Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate Weighted average grant date fair value (usd per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value Schedule of inventory Schedule of Inventory, Current [Table Text Block] WARRANTY OBLIGATIONS Product Warranty Disclosure [Text Block] Provision for U.S. federal or state income taxes Current Federal State and Local Tax Expense Benefit Current federal state and local tax expense benefit. Provision for income taxes related to subsidiaries located outside the U.S. Current Foreign Tax Expense (Benefit) 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 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 Product Liability Contingency [Table] Product Liability Contingency [Table] Product Liability [Line Items] Product Liability Contingency [Line Items] Changes in warranty estimates TERM LOANS Long-term Debt [Text Block] Schedule of summary of stock option activity Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block] Schedule of restricted stock unit activity Schedule of Share-based Compensation, Restricted Stock Units Award Activity [Table Text Block] Schedule of components of stock-based compensation expense in the consolidated statement of operations, by report line Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table Text Block] Schedule of stock-based compensation expense by award type Schedule of Compensation Cost for Share-based Payment Arrangements, Allocation of Share-based Compensation Costs by Plan [Table Text Block] Schedule of valuation assumptions of stock options Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] Allowances, accounts receivable Allowance for Doubtful Accounts Receivable Warranty obligations, current at fair value Product Warranty Accrual, Current, Fair Value Disclosure Product Warranty Accrual, Current, Fair Value Disclosure Warranty obligations, non-current at fair value Product Warranty Accrual, Noncurrent, Fair Value Disclosure Product Warranty Accrual, Noncurrent, Fair Value Disclosure Common stock, par value (usd per share) 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 Preferred stock, par value (usd per share) Preferred Stock, Par or Stated Value Per Share Preferred stock, shares authorized Preferred Stock, Shares Authorized Preferred stock, shares issued Preferred Stock, Shares Issued Preferred stock, shares outstanding Preferred Stock, Shares Outstanding Changes in the Company's product warranty liability Schedule of Product Warranty Liability [Table Text Block] Stock options and restricted stock units Employee Stock Options and Restricted Stock Units [Member] Employee Stock Options and Restricted Stock Units [Member] Employee stock purchase plan Employee Stock [Member] Total stock-based compensation expense Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table] Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table] Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] Balance—December 31, 2013 Fair Value, Measurement with Unobservable Inputs Reconciliations, Recurring Basis, Liability Value Accruals for warranties issued during period Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Warranties Issued Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Warranties Issued Settlements Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Payments Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Payments Increase due to accretion expense Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings Other Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Other Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Other Balance—March 31, 2014 Schedule of computation of basic and diluted net loss per share Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Schedule of potential common shares outstanding that were excluded from the computation of diluted net loss per share attributable to common stockholders Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block] Fair Value Measurements, Recurring and Nonrecurring [Table] Fair Value Measurements, Recurring and Nonrecurring [Table] Measurement Frequency [Axis] Measurement Frequency [Axis] Fair Value, Measurement Frequency [Domain] Fair Value, Measurement Frequency [Domain] Fair value, measurements, recurring Fair Value, Measurements, Recurring [Member] Level 2 Fair Value, Inputs, Level 2 [Member] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Asset Derivatives Assets, Fair Value Disclosure [Abstract] Foreign currency forward contracts Foreign Currency Contract, Asset, Fair Value Disclosure Liability Derivatives Liabilities, Fair Value Disclosure [Abstract] Foreign currency forward contracts Foreign Currency Contracts, Liability, Fair Value Disclosure