Equity [Abstract] Schedule of valuation assumptions of convertible preferred stock warrants Preferred Stock Warrants, Valuation Assumptions [Table Text Block] Preferred Stock Warrants, Valuation Assumptions [Table Text Block] Schedule of changes in fair value using recurring basis Fair Value, Measured on Recurring Basis, Gain (Loss) Included in Earnings [Table Text Block] Segments, Geographical Areas [Abstract] Schedule of Revenues from External Customers and Long-Lived Assets [Table] Schedule of Revenues from External Customers and Long-Lived Assets [Table] Geographical [Axis] Geographical [Axis] Segment, Geographical [Domain] Segment, Geographical [Domain] United States UNITED STATES International [Member] International [Member] International [Member] Revenues from External Customers and Long-Lived Assets [Line Items] Revenues from External Customers and Long-Lived Assets [Line Items] Revenues Revenue, Net Segment Reporting [Abstract] Schedule of Revenue by Major Customers, by Reporting Segments [Table] Schedule of Revenue by Major Customers, by Reporting Segments [Table] Major Customers [Axis] Major Customers [Axis] Name of Major Customer [Domain] Name of Major Customer [Domain] Customer Providing Largest Concentration of Receivable Customer With Highest Balance Due [Member] Customer With Highest Balance Due [Member] Customer Providing Second Largest Concentration of Receivable Customer With Second Highest Balance Due [Member] Customer With Second Highest Balance Due [Member] Customer Accounting for the Largest Concentration of Revenue Largest Customer Accounting for Most Revenue [Member] Largest Customer Accounting for Most Revenue [Member] Customer Accounting for Second Largest Concentration of Revenue Second Largest Customer Accounting for Most Revenue [Member] Second Largest Customer Accounting for Most Revenue [Member] Customer Accounting for Third Largest Concentraion Third Largest Customer Accounting for Most Revenue [Member] Third Largest Customer Accounting for Most Revenue [Member] Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Domain] Concentration Risk Benchmark [Domain] Accounts Receivable Accounts Receivable [Member] Net Revenue Net Revenue [Member] Net Revenue [Member] Concentration Risk Type [Axis] Concentration Risk Type [Axis] Concentration Risk Type [Domain] Concentration Risk Type [Domain] Credit Concentration Risk Credit Concentration Risk [Member] Customer Concentration Risk Customer Concentration Risk [Member] Revenue, Major Customer [Line Items] Revenue, Major Customer [Line Items] Percentage of concentration risk Concentration Risk, Percentage Number of customers considered to give rise to concentration risk Number of Customers Considered to Give Rise to Concentration Risk Number of Customers Considered to Give Rise to Concentration Risk Income Tax Disclosure [Abstract] Components of Deferred Tax Assets and Liabilities [Abstract] Current: Deferred Tax Assets, Net of Valuation Allowance, Current Classification [Abstract] Reserves and allowances Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Current Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Current Valuation allowance Deferred Tax Assets, Valuation Allowance, Current Total Current Deferred Tax Assets, Net of Valuation Allowance, Current Non-current: Deferred Tax Assets, Net of Valuation Allowance, Noncurrent Classification [Abstract] Net operating losses Deferred Tax Assets, Operating Loss Carryforwards, Noncurrent Deferred Tax Assets, Operating Loss Carryforwards, Noncurrent Stock-based compensation Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Share-based Compensation Cost, Noncurrent Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Share-based Compensation Cost, Noncurrent Deferred revenue Deferred Tax Assets, Deferred Income, Noncurrent Deferred Tax Assets, Deferred Income, Noncurrent Fixed assets and intangibles Deferred Tax Liabilities, Property, Plant and Equipment and Intangible Assets, Noncurrent Deferred Tax Liabilities, Property, Plant and Equipment and Intangible Assets, noncurrent Other Deferred Tax Assets, Deferred Expense Other, Noncurrent Deferred Tax Assets Tax Deferred Expense Other Current Valuation allowance Deferred Tax Assets, Valuation Allowance, Noncurrent Total non-current Deferred Tax Assets, Net of Valuation Allowance, Noncurrent Deferred tax liability Deferred Tax Liabilities, Gross Deferred Tax Assets, Net Deferred Tax Assets, Net Earnings Per Share [Abstract] NET LOSS PER SHARE ATTRIBUTABLE TO COMMON STOCKHOLDERS Earnings Per Share [Text Block] Disclosure of Compensation Related Costs, Share-based Payments [Abstract] Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range [Table] Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range [Table] Exercise Price Range [Axis] Exercise Price Range [Axis] Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Domain] Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Domain] $0.27–$0.27 Range One [Member] Range One [Member] 0.54–0.91 Range Two [Member] Range Two [Member] 1.63–1.63 Range Three [Member] Range Three [Member] 2.00–5.11 Range Four [Member] Range Four [Member] 5.23–8.43 Range Five [Member] Range Five [Member] 8.82–10.35 Range Six [Member] Range Six [Member] Total Range Seven [Member] Range Seven [Member] Exercise Price Range of Options Outstanding and Options Exercisable [Line Items] Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] Range of Exercise Prices - Lower Range Limit (usd per share) Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Range Limit Range of Exercise Prices - Upper Range Limit (usd per share) Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Upper Range Limit Number of Shares Outstanding Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Number of Outstanding Options Weighted- Average Remaining Life of Outstanding Options (in years) Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Outstanding Options, Weighted Average Remaining Contractual Term Weighted- Average Exercise Price of Options Outstanding (usd per share) Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Outstanding Options, Weighted Average Exercise Price Number of Shares Exercisable Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Number of Exercisable Options Weighted- Average Exercise Price of Options Exercisable (usd per share) Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Exercisable Options, Weighted Average Exercise Price Debt Disclosure [Abstract] CONVERTIBLE FACILITY Debt Disclosure [Text Block] Product Warranties Disclosures [Abstract] Warranty Obligations (Textual) [Abstract] Warranty Obligations (Textual) [Abstract] Warranty obligations. Changes in estimates related to warranty expense Changes in Estimates Related to Warranty Expense Changes in estimates related to warranty expense. Increase in estimated replacement costs Change in Estimated Warranty Expense Increase Change in estimated warranty expense increase. Reduction in estimated replacement costs Change in Estimated Warranty Expense Decrease Change in estimated warranty expense decrease. Warranty expense derived from inventory write-down Warranty Expense Derived from Inventory Write-down Warranty Expense Derived from Inventory Write-down Reduction in warranty expense to reflect lower replacement costs Standard Product Warranty Accrual, Period Increase (Decrease) Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table] Class of Stock [Axis] Class of Stock [Axis] Class of Stock [Domain] Class of Stock [Domain] Preferred Stock [Member] Preferred Stock [Member] Series E Preferred Stock Series E Preferred Stock [Member] Liability Class [Axis] Liability Class [Axis] Fair Value by Liability Class [Domain] Fair Value by Liability Class [Domain] Convertible preferred stock warrant liability Convertible Preferred Stock Warrant Liability [Member] Convertible preferred stock warrant liability. Class of Warrant or Right [Axis] Class of Warrant or Right [Axis] Class of Warrant or Right [Domain] Class of Warrant or Right [Domain] Warrants to purchase preferred stock - issue 1 Warrants to Purchase Preferred Stock - Issue One [Member] Warrants to Purchase Preferred Stock - Issue One [Member] Warrants to purchase preferred stock - issue 2 Warrants to Purchase Preferred Stock - Issue Two [Member] Warrants to Purchase Preferred Stock - Issue Two [Member] Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] Changes in Fair value using recurring basis Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] Beginning balance Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value Issuance of warrant to purchase shares of Series E convertible preferred stock Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales Fair value adjustments recognized in other (income) expense Fair Value, Assets Measured on Recurring Basis, Gain (Loss) Included in Other Income Reclassification of convertible preferred stock warrant liability to additional paid-in capital upon IPO Reclassification of Preferred Stock Warrant Liability Reclassification of preferred stock warrant liability. Ending balance Number of securities called by warrants Class of Warrant or Right, Number of Securities Called by Warrants or Rights Warrant to purchase common stock, price per share Class of Warrant or Right, Exercise Price of Warrants or Rights Common Stock, Number of Shares, Par Value and Other Disclosures [Abstract] Common Stock, Number of Shares, Par Value and Other Disclosures [Abstract] Conversion of preferred stock into common stock (in shares) Stock Issued During Period, Shares, Conversion of Convertible Securities Long-term Debt, by Current and Noncurrent [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] Term loans, net of unamortized discount of $0 and $435, respectively Secured Debt [Member] Equipment financing facility, net of unamortized discount of $94 and $156, respectively Equipment Financing Facility [Member] Equipment financing facility. Debt Instrument [Line Items] Debt Instrument [Line Items] Schedule of long-term debt Long-term Debt, Current and Noncurrent [Abstract] Total debt Long-term Debt Less current portion Long-term Debt, Current Maturities Long-term portion Long-term Debt, Excluding Current Maturities Net of unamortized discount Debt Instrument, Unamortized Discount Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies [Table] Commitments and Contingencies [Table] Commitments and Contingencies [Table] Range [Axis] Range [Axis] Range [Domain] Range [Domain] Maximum Maximum [Member] Commitments and Contingencies [Line Items] Commitments and Contingencies [Line Items] [Line Items] for Commitments and Contingencies [Table] Rent expense Operating Leases, Rent Expense, Net Corporate headquarters property Company agreed to lease Area of Real Estate Property Company Agreed to Lease Area of Real Estate Property Company Agreed to Lease Purchase obligation Purchase Obligation Purchase obligation time period Long Term Purchase Commitment, Time Period, Maximum Long Term Purchase Commitment, Time Period, Maximum Cancelable portion of purchase obligation Purchase Obligation, Cancelable Amount Purchase Obligation, Cancelable Amount Purchase obligation cancellation penalties Purchase Obligation, Cancellation Penalty, Maximum Purchase Obligation, Cancellation Penalty, Maximum Fair Value, by Balance Sheet Grouping [Table] Fair Value, by Balance Sheet Grouping [Table] Convertible Preferred Stock Warrant Liability [Member] Convertible preferred stock Convertible Preferred Stock [Member] Minimum Minimum [Member] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Fair Value Assumptions and Methodology for Assets and Liabilities [Abstract] Fair Value Assumptions and Methodology for Assets and Liabilities [Abstract] Expected term (in years) Fair Value Assumptions, Expected Term Expected volatility Fair Value Assumptions, Expected Volatility Rate Annual risk-free rate of return Fair Value Assumptions, Risk Free Interest Rate Dividend yield Fair Value Assumptions, Expected Dividend Rate Organization, Consolidation and Presentation of Financial Statements [Abstract] Organization and Description of Business (Textual) [Abstract] Organization and Description of Business (Textual) [Abstract] Organization and description of business. Common stock issued during period, in connection with credit facility Stock Issued During Period, Shares, New Issues Common stock exercise, allotment by underwriters Common Stock Exercise Allotment by Underwriters Common stock exercise allotment by underwriters. Common stock issued, price per share Share Price Common stock issued, value Proceeds from Issuance of Common Stock Gross Proceeds from issuance of common stock gross. Common stock purchased by related parties Stock Issued During Period Shares to Related Parties Stock issued during period shares to related parties. Proceeds from the sale of common stock Proceeds from Issuance Initial Public Offering Underwriters discounts and commissions Underwriters Discounts and Commissions Underwriters discounts and commissions. Other estimated offering costs Other Estimated Offering Costs Other estimated offering costs. Convertible preferred stock, shares outstanding Preferred Stock, Shares Outstanding Convertible preferred stock, carrying value Preferred Stock, Value, Issued Conversion of convertible preferred stock into common stock Conversion of Convertible Preferred Stock into Common Stock Conversion of convertible preferred stock into common stock. Convertible preferred stock, warrant liability Adjustments to Additional Paid in Capital Reclassification of Preferred Stock Warrant Liability Adjustments to additional paid in capital reclassification of preferred stock warrant liability. Convertible preferred stock, warrants to purchase Class of Warrant Number of Preferred Stock Securities Called by Warrants Class of warrant number of preferred stock securities called by warrants. Number of common stock shares called by warrants Convertible notes, outstanding balance of principal and accrued paid in kind interest Convertible Notes Payable Conversion of notes into common stock Stock Issued During Period Shares Conversion of Convertible Securities and Paid in Kind Interest Stock issued during period shares conversion of convertible securities and paid in kind interest. Conversion price of convertible notes Debt Instrument, Convertible, Conversion Price Debt issuance costs and discounts related to conversion Write off of Deferred Debt Issuance Cost Conversion of the outstanding notes and the automatic termination of the Convertible Facility Automatic Termination of Convertible Facility Automatic termination of convertible facility. Common stock, shares authorized Common Stock, Shares Authorized Preferred stock, shares authorized Preferred Stock, Shares Authorized 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] Options outstanding Stock Options [Member] Convertible notes Convertible Debt Securities [Member] Stock compensation plan Employee Stock Option [Member] Restricted stock outstanding Restricted Stock Units (RSUs) [Member] Warrant Warrant [Member] Warrants to purchase convertible preferred stock Warrant Convertible Common Stock [Member] Warrant convertible common stock. 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 Fair Value Disclosures [Abstract] FAIR VALUE MEASUREMENTS Fair Value, Measurement Inputs, Disclosure [Text Block] Quarterly Financial Information Disclosure [Abstract] Quarterly Financial Information Quarterly Financial Information [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] Term loan Equipment financing facility Revolving Credit Facility Revolving Credit Facility [Member] Lender Name [Axis] Lender Name [Axis] Line of Credit Facility, Lender [Domain] Line of Credit Facility, Lender [Domain] Horizon Technology Finance Corporation Horizon Technology Finance Corporation [Member] Horizon Technology Finance Corporation. Hercules Technology Growth Capital, Inc Hercules Technology Growth Capital Inc [Member] Hercules Technology Growth Capital, Inc. Bridge Bank National Association and Comerica Bridge Bank National Association and Comerica [Member] Bridge Bank, National Association and Comerica. Wells Fargo Bank Wells Fargo Bank [Member] Wells Fargo Bank. Minimum Maximum Variable Rate [Axis] Variable Rate [Axis] Information by type of variable rate. Variable Rate [Domain] Variable Rate [Domain] [Domain] for Information by type of variable rate. Prime Rate Prime Rate [Member] Prime Rate [Member] London Interbank Offered Rate (LIBOR) or Base Rate London Interbank Offered Rate (LIBOR) or Base Rate [Member] London Interbank Offered Rate (LIBOR) or Base Rate [Member] Long-Term Debt (Textual) [Abstract] Long Term Debt (Textual) [Abstract] Long term debt. Convertible loan facility, maximum borrowing capacity Line of Credit Facility, Maximum Borrowing Capacity Term Loan interest at an prime rate Debt Instrument, Basis Spread on Variable Rate Amount of liquidity required for debt compliance Amount of Liquidity Required for Debt Compliance Amount of Liquidity Required for Debt Compliance Amount of undrawn credit for debt compliance Amount of Undrawn Credit for Debt Compliance Amount of Undrawn Credit for Debt Compliance Convertible loan facility, remaining borrowing capacity Line of Credit Facility, Remaining Borrowing Capacity Debt instrument additional borrowing amount Debt Instrument, Increase, Additional Borrowings Projected EBITDA and revenue to meet additional term loans, achievement percentage Projected EBITDA and Revenue to Meet Additional Term Loans, Achievement Percentage Projected EBITDA and Revenue to Meet Additional Term Loans, Achievement Percentage Line of credit facility extension term Line Of Credit Facility Extension Term Line Of Credit Facility Extension Term Repayment of term loans Repayments of Subordinated Debt Term Loan interest at an annual rate Line of Credit Facility, Interest Rate During Period Long-term debt, gross Long-term Debt, Gross Interest rate during period Debt Instrument, Interest Rate During Period Warrant to purchase common stock, price per share Convertible preferred stock warrant liability Warrants and Rights Outstanding Summary of open foreign currency forward contracts Schedule of Derivative Instruments [Table Text Block] Schedule of financial instruments that are measured at fair value on a recurring basis Fair Value, Liabilities Measured on Recurring Basis [Table Text Block] Schedule of Stock by Class [Table] Schedule of Stock by Class [Table] Common Stock Common Stock [Member] Class of Stock [Line Items] Class of Stock [Line Items] Stockholders Equity (Textual) [Abstract] Stockholders Equity (Textual) [Abstract] Stockholders equity. Convertible preferred stock converted. shares Conversion of Stock, Shares Converted LONG-TERM DEBT Long-term Debt [Text Block] Income Taxes [Table] Income Taxes [Table] Income Taxes [Table] Income Tax Authority [Axis] Income Tax Authority [Axis] Income Tax Authority [Domain] Income Tax Authority [Domain] Internal Revenue Service (IRS) Internal Revenue Service (IRS) [Member] State and Local Jurisdiction State and Local Jurisdiction [Member] California CALIFORNIA Income Taxes [Line Items] Income Taxes [Line Items] [Line Items] for Income Taxes [Table] Provision for U.S. federal or state income taxes Current State and Local Tax Expense (Benefit) provision for income taxes related to foreign operations Current Foreign Tax Expense (Benefit) Federal statutory income tax rate Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate Operating loss carryforwards Operating Loss Carryforwards Unrecognized Tax Benefits Unrecognized Tax Benefits Unrecognized Tax Benefits, Increases Resulting from Current Period Tax Positions Unrecognized Tax Benefits, Increases Resulting from Current Period Tax Positions Unrecognized Tax Benefits, Increases Resulting from Prior Period Tax Positions Unrecognized Tax Benefits, Increases Resulting from Prior Period Tax Positions Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense COMMITMENTS AND CONTINGENCIES Commitments and Contingencies Disclosure [Text Block] Statement of Other Comprehensive Income [Abstract] Statement [Table] Statement [Table] Scenario [Axis] Scenario [Axis] Scenario, Unspecified [Domain] Scenario, Unspecified [Domain] Statement [Line Items] Statement [Line Items] Net loss attributable to common stockholders Net Income (Loss) Attributable to Parent 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 Other comprehensive (loss) income Other Comprehensive Income (Loss), Net of Tax Comprehensive loss attributable to common stockholders Comprehensive Income (Loss), Net of Tax, Attributable to Parent Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract] Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract] 2013 Operating Leases, Future Minimum Payments Due, Next Twelve Months 2014 Operating Leases, Future Minimum Payments, Due in Two Years 2015 Operating Leases, Future Minimum Payments, Due in Three Years 2016 Operating Leases, Future Minimum Payments, Due in Four Years 2017 Operating Leases, Future Minimum Payments, Due in Five Years Thereafter Operating Leases, Future Minimum Payments, Due Thereafter Total minimum lease payments Operating Leases, Future Minimum Payments Due Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] Geographic concentration risk Geographic Concentration Risk [Member] Segment sales revenue Sales Revenue, Segment [Member] CANADA CANADA Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Percentage of total net revenues Revenue, Net, Percentage Revenue, Net, Percentage Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Plan Name [Axis] Plan Name [Axis] Plan Name [Domain] Plan Name [Domain] 2006 Plan Two Thousand Six Plan [Member] Two thousand six plan. 2011 Plan Two Thousand and Eleven Plan [Member] Two thousand and eleven plan. 2011 Employee Stock Purchase Plan (ESPP) Employee Stock Purchase Plan (ESPP) [Member] Employee Stock Purchase Plan (ESPP) Award Type [Axis] Award Type [Axis] Award Type [Domain] Award Type [Domain] Restricted stock units Award Date [Axis] Award Date [Axis] Award Date [Axis] Award Date [Domain] Award Date [Domain] [Domain] for Award Date [Axis] Before August 2012 Before August [Member] Before August. After August 2012 After August [Member] After August. Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Equity awards granted period vest over Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period Equity awards granted contractual term Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term Common stock, shares outstanding Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number Number of shares outstanding, granted Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross Issue of common stock Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized Expiration term of ESPP Share Based Compensation Arrangement by Share Based Payment Award Expiration in Years Share based compensation arrangement by share based payment award expiration in years. Increase in number of shares of common stock reserved for issuance under the stock incentive plan Increase in Common Stock Shares Reserved for Future Issuance Percentage Increase in common stock shares reserved for future issuance percentage. Maximum number of shares that be issued pursuant to the exercise of incentive stock options Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant Yearly, share increase in reserved shares Share Based Compensation Arrangement by Share Based Payment Award Evergreen Shares Share based compensation arrangement by share based payment award evergreen shares. Offering periods, description Offering Period Maximum Offering period maximum. Number of interim purchase periods Employee Stock Purchase Plan, Number of Interim Purchase Periods Employee Stock Purchase Plan, Number of Interim Purchase Periods General duration (in months) of employee stock purchase plan General Duration of Employee Stock Purchase Plan General duration of employee stock purchase plan. Payroll deductions Share-based Compensation Arrangement by Share-based Payment Award, Maximum Employee Subscription Rate Fair market value Share-based Compensation Arrangement by Share-based Payment Award, Purchase Price of Common Stock, Percent Look-back feature in ESPP Share Based Compensation Arrangement by Share Based Payment Award Look Back Feature Period Share based compensation arrangement by share based payment award look back feature period. Recognition period for additional expense triggered by the reset feature Employee Stock Purchase Plan, Additional Expense Trigged by Reset Feature, Period for Recognition Employee Stock Purchase Plan, Additional Expense Trigged by Reset Feature, Period for Recognition Purchase of common stock IRS Limitation for Employees Right to Acquire Class Common Stock Under ESPP IRS Limitation for an employee's right to acquire class common stock under ESPP. Employee stock purchase plan offering period Employee Stock Purchase Plan, Offering Period Employee Stock Purchase Plan, Offering Period Number of purchase periods Employee Stock Purchase Plan, Number of Purchase Periods Employee Stock Purchase Plan, Number of Purchase Periods Total stock-based compensation expense Allocated Share-based Compensation Expense Intrinsic value of options exercised Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Total Intrinsic Value Number of options outstanding that were vested, exercisable and expected to vest Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Number Weighted-average fair value value per share, vested Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Weighted Average Exercise Price Weighted-average remaining contractual term, vested Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Weighted Average Remaining Contractual Term Aggregate intrinsic value, exercisable shares Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Aggregate Intrinsic Value Number of shares exercisable Common stock fair value, per share Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Basis for Determining Aggregate Intrinsic Value, Company's Share Price, Per Share Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Basis for Determining Aggregate Intrinsic Value, Company's Share Price, Per Share Fair value of stock vested during period Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Total Fair Value Weighted average remaining contractual term Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Outstanding, Weighted Average Remaining Contractual Terms 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, Total Compensation Cost Not yet Recognized Weighted-average period Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Period for Recognition Net revenues and long-lived assets by geographic region Schedule of Revenue from External Customers and Long-Lived Assets, by Geographical Areas [Table Text Block] Income Statement [Abstract] Net revenues 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 expense, net: Other Nonoperating Income (Expense) [Abstract] Interest income Investment Income, Interest 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 attributable to common stockholders 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 attributable to common stockholders, basic and diluted Weighted Average Number of Shares Outstanding, Basic and Diluted Property, Plant and Equipment [Abstract] Depreciation and amortization Depreciation, Depletion and Amortization Assets acquired under capital lease obligations, gross Capital Leased Assets, Gross Accumulated amortization of leasehold assets Capital Leases, Lessee Balance Sheet, Assets by Major Class, Accumulated Depreciation Additions to capitalized internal use computer software Capitalized Computer Software, Additions Amortization of capitalized internal use computer software Capitalized Computer Software, Amortization Accounting Policies [Abstract] SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Significant Accounting Policies [Text Block] 2013 Long-term Debt, Gross, Maturities, Repayments of Principal in Next Twelve Months Long-term Debt, Gross, Maturities, Repayments of Principal in Next Twelve Months 2014 Long-term Debt, Gross, Maturities, Repayments of Principal in Year Two Long-term Debt, Gross, Maturities, Repayments of Principal in Year Two 2015 Long-term Debt, Gross, Maturities, Repayments of Principal in Year Three Long-term Debt, Gross, Maturities, Repayments of Principal in Year Three 2016 Long-term Debt, Gross, Maturities, Repayments of Principal in Year Four Long-term Debt, Gross, Maturities, Repayments of Principal in Year Four Total debt Principles of Consolidation Consolidation, Policy [Policy Text Block] Use of Estimates Use of Estimates, Policy [Policy Text Block] Risks and Uncertainties Risks and Uncertainties in Entity's Business, Policy [Policy Text Block] Risks and Uncertainties in Entity's Business, Policy [Policy Text Block] Revenue Recognition Revenue Recognition, Policy [Policy Text Block] Cost of Revenues Cost of Sales, Policy [Policy Text Block] Cash and Cash Equivalents Cash and Cash Equivalents, Policy [Policy Text Block] Fair Value of Financial Instruments Fair Value of Financial Instruments, Policy [Policy Text Block] Derivatives Instruments Derivatives, Policy [Policy Text Block] Allowances for Doubtful Accounts Trade and Other Accounts Receivable, Policy [Policy Text Block] Inventory Inventory, Policy [Policy Text Block] Property and Equipment Property, Plant and Equipment, Policy [Policy Text Block] Capitalized Software Costs Internal Use Software, Policy [Policy Text Block] Long-Lived Assets Impairment or Disposal of Long-Lived Assets, Policy [Policy Text Block] Warranty Obligations Standard Product Warranty, Policy [Policy Text Block] Research and Development Costs Research and Development Expense, Policy [Policy Text Block] Share-Based Compensation Share-based Compensation, Option and Incentive Plans Policy [Policy Text Block] Comprehensive Loss Comprehensive Income, Policy [Policy Text Block] Convertible Preferred Stock Warrants Convertible Preferred Stock Warrants, Policy [Policy Text Block] Convertible Preferred Stock Warrants, Policy [Policy Text Block] Income Taxes Income Tax, Policy [Policy Text Block] Deferred Offering Costs Deferred Offering Costs [Policy Text Block] Deferred Offering Costs [Policy Text Block] Deferred Financing Costs Deferred Charges, Policy [Policy Text Block] Schedule of summary of stock option activity Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block] Schedule of stock options outstanding under the 2006 and 2011 Plans Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range [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] CONCENTRATION OF CREDIT RISK AND MAJOR CUSTOMERS Concentration Risk Disclosure [Text Block] Schedule of Effective Income Tax Rate Reconciliation Schedule of Effective Income Tax Rate Reconciliation [Table Text Block] Schedule of Deferred Tax Assets and Liabilities Schedule of Deferred Tax Assets and Liabilities [Table Text Block] Statement of Stockholders' Equity [Abstract] Equity Components [Axis] Equity Components [Axis] Equity Component [Domain] Equity Component [Domain] Common Stock Additional Paid-In-Capital Additional Paid-in Capital [Member] Accumulated Deficit Retained Earnings [Member] Accumulated Other Comprehensive Income Accumulated Other Comprehensive Income (Loss) [Member] Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] BALANCE (in shares) Shares, Outstanding BALANCE Stockholders' Equity Attributable to Parent Common stock issued during period, shares issued Common stock issued during period, value Stock Issued During Period, Value, New Issues Exercise of stock options (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period Exercise of stock options Adjustments to Additional Paid in Capital, Share-based Compensation and Exercise of Stock Options Stock-based compensation Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition Issuance of common stock under employee stock plans (in shares) Stock Issued During Period, Shares, Share-based Compensation, Net of Forfeitures Private placement of common stock, value Stock Issued During Period, Value, Other Private placement of common stock (in shares) Stock Issued During Period, Shares, Other Fair value of warrants and common stock issued in connection with convertible notes Adjustment to Additional Paid in Capital, Warrants and Common Stock Issued in Connection with Convertible Securities Adjustment to Additional Paid in Capital, Warrants and Common Stock Issued in Connection with Convertible Securities Fair value of beneficial conversion feature upon issuance of convertible notes Adjustments to Additional Paid in Capital, Convertible Debt with Conversion Feature Fair value of beneficial conversion feature from accrued paid-in-kind interest of convertible notes Adjustments to Additional Paid in Capital, Other Accrued Paid-in-Kind Interest, Convertible Notes Adjustments to Additional Paid in Capital, Other Accrued Paid-in-Kind Interest, Convertible Notes Conversion of convertible preferred stock into common stock upon IPO (in shares) Stock Issued During Period Share Conversion of Convertible Preferred Stock into Common Stock Stock issued during period share conversion of convertible preferred stock into common stock. Conversion of convertible preferred stock into common stock upon IPO Stock Issued During Period Value Conversion of Convertible Preferred Stock in to Common Stock Stock issued during period value conversion of convertible preferred stock in to common stock. Conversion of convertible notes and paid-in-kind interest into common stock upon IPO (in shares) Debt Conversion, Converted Instrument, Shares Issued Conversion of convertible notes and paid-in-kind interest into common stock upon IPO Debt Conversion, Converted Instrument, Amount Reclassification of preferred stock warrant liability to additional paid in capital upon IPO Adjustments to Additional Paid in Capital, Reclassification of Preferred Stock Warrant Liability to Additional Paid in Capital Upon IPO Adjustment to Additional Paid in Capital, Reclassification of Preferred Stock Warrant Liability to Additional Paid in Capital Upon IPO Net loss Foreign currency translation adjustment BALANCE (in shares) BALANCE Inventory Disclosure [Abstract] INVENTORY Inventory Disclosure [Text Block] Share Price Payments of financing costs Payments of Financing Costs Schedule of long-term debt Schedule of Long-term Debt Instruments [Table Text Block] Schedule of maturities of long-term debt Schedule of Maturities of Long-term Debt [Table Text Block] Other expense, net PROPERTY AND EQUIPMENT, NET Property, Plant and Equipment Disclosure [Text Block] Line of Credit Facility [Table] Line of Credit Facility [Table] Credit Facility [Axis] Credit Facility [Axis] Credit Facility [Domain] Credit Facility [Domain] Convertible secured junior debt Convertible Subordinated Debt [Member] Amendment [Axis] Amendment [Axis] Amendment [Axis] Amendment [Domain] Amendment [Domain] [Domain] for Amendment [Axis] Debt agreement, as amended Amendment to Debt Agreement [Member] Amendment to Debt Agreement [Member] Line of Credit Facility [Line Items] Line of Credit Facility [Line Items] Convertible Facility (Textual) [Abstract] Convertible Facility (Textual) [Abstract] Convertible facility. Convertible facility convertible notes issued Proceeds from Convertible Debt Common stock conversion price per share Common stock exercisable contractual term Convertible Securities, Common Stock, Contractual Term Convertible Securities, Common Stock, Contractual Term Debt discounts and issuance costs Debt Discounts and Debt Issuance Cost Debt discounts and debt issuance cost. Debt interest expense Interest Expense, Debt STOCKHOLDERS' EQUITY AND WARRANTS Stockholders' Equity Note Disclosure [Text Block] Schedule of future minimum rental payments for operating leases Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block] ORGANIZATION AND DESCRIPTION OF BUSINESS Organization, Consolidation and Presentation of Financial Statements Disclosure and Significant Accounting Policies [Text Block] 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 Entity Well-Known Seasoned Issuer Entity Well-known Seasoned Issuer Entity Voluntary Filers Entity Voluntary Filers Entity Current Reporting Status Entity Current Reporting Status Entity Public Float Entity Public Float Accounting Policies [Table] Accounting Policies [Table] Accounting Policies [Table] Products and Services [Axis] Products and Services [Axis] Products and Services [Domain] Products and Services [Domain] Product Product [Member] Microinverters Microinverters [Member] Microinverters [Member] First and second generation First and Second Generation [Member] First and Second Generation [Member] Third generation Third Generation [Member] Third Generation [Member] Service Service [Member] Service [Member] Enlighten web-based monitoring service Enlighten Web-based Monitoring Service [Member] Enlighten Web-based Monitoring Service [Member] Accounting Policies [Line Items] Accounting Policies [Line Items] [Line Items] for Accounting Policies [Table] Percent of revenue represented by product line or service Revenue recognition period Revenue Recognition, Recognition Period Revenue Recognition, Recognition Period Deferred revenue Deferred Revenue Fair Value of convertible notes outstanding Convertible Debt, Fair Value Disclosures Allowance for doubtful accounts Allowance for Doubtful Accounts Receivable Property and equipment estimated useful life Property, Plant and Equipment, Useful Life Product warranty coverage period Product Warranty, Coverage Period Product warranty maximum coverage period. Product warranty expense Product Warranty Expense Research and development expense Stock-based compensation requisite service period Share-based Compensation Arrangement by Share-based Payment Award, Award Requisite Service Period Fair value of warrants Warrants, Fair Value, Amount Outstanding Warrants, Fair Value Of Amount Outstanding Deferred offering costs Deferred Offering Costs 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] 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] Employee Service Share-based Compensation, Allocation of Recognized Period Costs, Report Line [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 Changes in the Company's product warranty liability Schedule of Product Warranty Liability [Table Text Block] GEOGRAPHIC INFORMATION Segment Reporting Disclosure [Text Block] INCOME TAXES Income Tax Disclosure [Text Block] Schedule of Quarterly Financial Information Schedule of Quarterly Financial Information [Table Text Block] Related Party Transactions [Abstract] Schedule of Related Party Transactions, by Related Party [Table] Schedule of Related Party Transactions, by Related Party [Table] Related Party [Axis] Related Party [Axis] Related Party [Domain] Related Party [Domain] Investor Investor [Member] KPCB Holdings, Inc. KPCB Holdings, Inc. [Member] KPCB Holdings, Inc. [Member] Related Party Transaction [Line Items] Related Party Transaction [Line Items] Revenue from related parties Revenue from Related Parties Loss related to the fair value adjustment of outstanding derivative instruments Gain (Loss) on Foreign Currency Derivative Instruments Not Designated as Hedging Instruments Derivative [Table] Derivative [Table] Derivative, by Nature [Axis] Derivative, by Nature [Axis] Derivative, Name [Domain] Derivative, Name [Domain] January 15, 2013 January Fifteen Two Thousand Thirteen [Member] January fifteen two thousand thirteen. Derivative [Line Items] Derivative [Line Items] Summary of open foreign currency forward contracts Derivative Instruments Not Designated as Hedging Instruments [Abstract] Foreign Quantity Notional Amount of Foreign Currency Derivative Instruments Not Designated as Hedging Instruments Market Value Foreign Currency Derivative Instruments Not Designated as Hedging Instruments Market Value Foreign currency derivative instruments not designated as hedging instruments market value. Asset (Liability) Foreign Currency Derivative Instruments Not Designated as Hedging Instruments, Liability at Fair Value Stock options The Fair Value of Each Option Granted During the Period [Abstract] Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract] Expected term (in years) 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 fair value on grant date 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] United States China CHINA Other Other Country [Member] Other country. Long-lived assets by geographic region Long Lived Assets [Abstract] Long lived assets. Total Long-Lived Assets Schedule of Property, Plant and Equipment [Table] Schedule of Property, Plant and Equipment [Table] Property, Plant and Equipment, Type [Axis] Property, Plant and Equipment, Type [Axis] Property, Plant and Equipment, Type [Domain] Property, Plant and Equipment, Type [Domain] Equipment and machinery Machinery and Equipment [Member] Furniture and fixtures Furniture and Fixtures [Member] Computer equipment Computer Equipment [Member] Capitalized software Software Development [Member] Leasehold improvements Leasehold Improvements [Member] Construction in progress Construction in Progress [Member] Property, Plant and Equipment [Line Items] Property, Plant and Equipment [Line Items] Estimated useful life Property and equipment, gross Property, Plant and Equipment, Gross Less accumulated depreciation and amortization Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Property and equipment, net Property, Plant and Equipment, Net RELATED PARTY TRANSACTIONS Related Party Transactions Disclosure [Text Block] Statement of Financial Position [Abstract] Allowances, accounts receivable Common stock, par value Common Stock, Par or Stated Value Per Share Common stock, shares issued Common Stock, Shares, Issued Common stock, shares outstanding Common Stock, Shares, Outstanding Preferred stock, par value Preferred Stock, Par or Stated Value Per Share Preferred stock, shares issued Preferred Stock, Shares Issued Preferred stock, shares outstanding Statement of Cash Flows [Abstract] Convertible debt Convertible Debt [Member] Debt, excluding convertible debt Debt, Excluding Convertible Debt [Member] Debt, Excluding Convertible Debt [Member] 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] Provision for doubtful accounts Provision for Doubtful Accounts Net loss on disposal of assets Gains (Losses) on Sales of Other Assets Non-cash interest expense Amortization of Financing Costs and Discounts Stock-based compensation Share-based Compensation Change in fair value of convertible preferred stock warrants Unrealized Gain (Loss) on Derivatives 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 and other liabilities Increase (Decrease) in Accounts Payable and Accrued Liabilities Deferred revenues Increase (Decrease) in Deferred Revenue Net cash used in operating activities Net Cash Provided by (Used in) Operating Activities Cash flows from investing activities: Net Cash Provided by (Used in) Investing Activities [Abstract] Purchases of property and equipment Payments to Acquire Property, Plant, and Equipment Net cash used in investing activities Net Cash Provided by (Used in) Investing Activities Cash flows from financing activities: Net Cash Provided by (Used in) Financing Activities [Abstract] Proceeds from issuance of convertible preferred stock Proceeds from Issuance of Convertible Preferred Stock Payment of costs related to issuance of convertible preferred stock and offering costs Payments of Stock Issuance Costs Proceeds from issuance of convertible notes Proceeds from (Repayments of) Notes Payable Payments of costs related to issuance of convertible notes and financing costs Proceeds from private placement of common stock Proceeds from Issuance of Private Placement Principal payments under capital leases Repayments of Long-term Capital Lease Obligations Proceeds from borrowings under term loans Proceeds from Issuance of Long-term Debt Repayments of term loans Repayments of Long-term Debt Proceeds from issuance of common stock under employee stock plans Proceeds from Stock Plans Proceeds from issuance of common stock in IPO, net of underwriting discounts and commissions Net cash provided by 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 and cash equivalents Cash and Cash Equivalents, Period Increase (Decrease) Cash and cash equivalents — Beginning of period Cash and Cash Equivalents, at Carrying Value Cash and cash equivalents — End of period Supplemental disclosures of cash flow information: Supplemental Cash Flow Information [Abstract] Cash paid for interest Interest Paid Non-cash financing and investing activities: Noncash Investing and Financing Items [Abstract] Assets acquired under capital lease Capital Lease Obligations Incurred Purchases of property and equipment included in accounts payable Capital Expenditures Incurred but Not yet Paid Offering costs not yet paid Offering Costs Not Yet Paid Offering costs not yet paid. Conversion of convertible notes into common stock upon IPO Stock Issued During Period, Value, Conversion of Convertible Securities Reclassification of convertible preferred stock warrant liability to additional paid-in capital upon IPO Schedule of inventory Inventory, Net [Abstract] Raw materials Inventory, Raw Materials, Gross Finished goods Inventory, Finished Goods, Gross Total inventory Inventory, Net Inventory (Textual) [Abstract] Inventory (Textual) [Abstract] Inventory. Inventory write-downs Inventory Write-down Company's stock option activity Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] Number of shares options outstanding, beginning Number of Shares Outstanding, Exercised Number of Shares Outstanding, Cancelled Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period Number of shares options outstanding, ending Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward] Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward] Weighted-average exercise price per share options outstanding, beginning balance (usd per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price Weighted-average exercise price per share, granted (usd per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price Weighted- Average Exercise Price per Share, Exercised (usd per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price Weighted-average exercise price per share, cancelled (usd per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period, Weighted Average Exercise Price Weighted-average exercise price per share options outstanding, ending balance (usd per share) Restricted Stock Units [Roll Forward] Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] December 31, 2011 (shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number Granted (shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period Vested (shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period Canceled (shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period December 31, 2012 (shares) Weighted Average Fair Value per Share at Grant Date [Roll Forward] Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward] December 31, 2011 (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 (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 (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 (usd per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value December 31, 2012 (usd per share) 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] Recurring Fair Value, Measurements, Recurring [Member] Fair Value, Hierarchy [Axis] Fair Value, Hierarchy [Axis] Fair Value, Measurements, Fair Value Hierarchy [Domain] Fair Value, Measurements, Fair Value Hierarchy [Domain] Level 3 Fair Value, Inputs, Level 3 [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] Company's financial instruments that measured at fair value on a recurring basis Liabilities, Fair Value Disclosure [Abstract] Preferred stock warrant liability (Level 3) Mandatorily Redeemable Preferred Stock, Fair Value Disclosure Foreign currency forward contracts (Level 2) Foreign Currency Contracts, Liability, Fair Value Disclosure Total Liabilities, Fair Value Disclosure STOCK-BASED COMPENSATION Disclosure of Compensation Related Costs, Share-based Payments [Text Block] Changes in the Company's product warranty liability Movement in Standard and Extended Product Warranty, Increase (Decrease) [Roll Forward] Balance, at beginning of year Product Warranty Accrual Warranty expense Extended Product Warranty Accrual, Warranties Issued Settlements Standard Product Warranty Accrual, Payments Balance, at end of year Less current portion Product Warranty Accrual, Current Long-term portion Product Warranty Accrual, Noncurrent WARRANTY OBLIGATIONS Product Warranty Disclosure [Text Block] Stock options and restricted stock units Employee Stock Options and Restricted Stock Units [Member] Employee Stock Options and Restricted Stock Units [Member] ESPP Employee Stock [Member] Property, plant and equipment Property, Plant and Equipment [Table Text Block] Preferred Stock ASSETS Assets [Abstract] Current assets: Assets, Current [Abstract] Cash and cash equivalents Accounts receivable, net of allowances of $1,177 and $144 as of December 31, 2012 and 2011 Accounts Receivable, Net, Current Inventory Prepaid expenses and other Prepaid Expense and Other Assets, Current Total current assets Assets, Current Property 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 Current portion of term loans Loans Payable, Current Total current liabilities Liabilities, Current Long-term liabilities: Liabilities, Noncurrent [Abstract] Deferred revenues Deferred Revenue, Noncurrent Warranty obligations Other liabilities Other Liabilities, Noncurrent Term loans Loans Payable, Noncurrent Convertible notes Convertible Notes Payable, Noncurrent Total long-term liabilities Liabilities, Noncurrent Total liabilities Liabilities Commitments and contingencies Commitments and Contingencies Stockholders’ equity: Stockholders' Equity Attributable to Parent [Abstract] Preferred stock, value, issued Common stock, $0.00001 par value, 100,000 shares authorized, 40,856 shares issued and outstanding at December 31, 2012; 41,410 shares authorized, 1,698 shares issued and outstanding at December 31, 2011 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 Total liabilities and stockholders’ equity Liabilities and Equity Effective Income Tax Rate, Continuing Operations, Tax Rate Reconciliation [Abstract] Income tax benefit at statutory rate Income Tax Reconciliation, Income Tax Expense (Benefit), at Federal Statutory Income Tax Rate State taxes, net of federal benefit Income Tax Reconciliation, State and Local Income Taxes Change in valuation allowance Income Tax Reconciliation, Change in Deferred Tax Assets Valuation Allowance Income Tax Reconciliation Nondeductible and Nontaxable Expense Other Income Tax Reconciliation, Nondeductible and Nontaxable Expense Other Income Tax Reconciliation Nondeductible and Nontaxable Expense Other Uncertain tax positions Income Tax Reconciliation, Tax Contingencies, Foreign Provision for income taxes Income Tax Expense (Benefit), Continuing Operations