Organization, Consolidation and Presentation of Financial Statements [Abstract] Schedule of Product Information [Table] Schedule of Product Information [Table] Product and Service [Axis] Product and Service [Axis] Product and Service [Domain] Product and Service [Domain] Microinverter Microinverter [Member] Microinverter [Member] Residential and Commercial Systems Residential And Commercial Systems [Member] Residential And Commercial Systems [Member] Product Information [Line Items] Product Information [Line Items] Number of product shipped (deliverable) Number Of Product Shipped Number Of Product Shipped Number of watts (watt) Number Of Watts Number Of Watts Number of product deployed (system) Number Of Product Deployed Number Of Product Deployed Number of countries in which product is deployed (country) Number Of Countries In Which Product Is Deployed Number Of Countries In Which Product Is Deployed Restructuring and Related Activities [Abstract] Restructuring and Related Costs Restructuring and Related Costs [Table Text Block] Schedule of Restructuring Reserve by Type of Cost Schedule of Restructuring Reserve by Type of Cost [Table Text Block] Schedule of Restructuring and Related Costs [Table] Schedule of Restructuring and Related Costs [Table] Restructuring Plan [Axis] Restructuring Plan [Axis] Restructuring Plan [Domain] Restructuring Plan [Domain] Restructuring Plan 2018 Restructuring Plan 2018 [Member] Restructuring Plan 2018 [Member] Restructuring Plan 2016 Restructuring Plan 2016 [Member] Restructuring Plan 2016 [Member] Restructuring Type [Axis] Restructuring Type [Axis] Type of Restructuring [Domain] Type of Restructuring [Domain] Redundancy and Employee Severance and Benefits Employee Severance [Member] Asset impairments Asset Impairments [Member] Asset Impairments [Member] Consultants engaged in restructuring activities Consultants Fees [Member] Consultants Fees [Member] Lease loss reserves and contract termination costs Lease Loss Reserves And Contract Termination Costs [Member] Lease Loss Reserves And Contract Termination Costs [Member] Restructuring Cost and Reserve [Line Items] Restructuring Cost and Reserve [Line Items] Total restructuring Restructuring Charges DESCRIPTION OF BUSINESS AND BASIS OF PRESENTATION Organization, Consolidation and Presentation of Financial Statements Disclosure and Significant Accounting Policies [Text Block] Goodwill and Intangible Assets Disclosure [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] ASIC development Developed Technology Rights [Member] Finite-Lived Intangible Assets [Line Items] Finite-Lived Intangible Assets [Line Items] Useful life Finite-Lived Intangible Asset, Useful Life Amortization expense related to intangible assets Amortization of Intangible Assets Fair Value Disclosures [Abstract] 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 and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] Level 3 Fair Value, Inputs, Level 3 [Member] Liability Class [Axis] Liability Class [Axis] Fair Value by Liability Class [Domain] Fair Value by Liability Class [Domain] Warranty obligations Warranty, Rights and Obligations, Fair Value Option [Member] Third party option to purchase receivables at a discount Third Party Option To Purchase Receivables At Discount [Member] Third Party Option To Purchase Receivables At Discount [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] Liabilities: Liabilities, Fair Value Disclosure [Abstract] Fair value liabilities Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability Value 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 units Restricted Stock Units (RSUs) [Member] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Number of Shares Outstanding Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] Outstanding, beginning balance (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, ending balance (in shares) Expected to vest (in shares) Share-Based Compensation Arrangement By Share-Based Payment Award, Equity Instruments Other Than Options, Vested And Expected To Vest, Outstanding, Number Share-Based Compensation Arrangement By Share-Based Payment Award, Equity Instruments Other Than Options, Vested And Expected To Vest, Outstanding, Number 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, beginning balance (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, ending balance (in usd per share) Expected to vest (in usd per share) Share-Based Compensation Arrangement By Share-Based Payment Award, Equity Instruments Other than Options, Vested And Expected To Vest, Outstanding, Weighted Average Exercise Price Share-Based Compensation Arrangement By Share-Based Payment Award, Equity Instruments Other than Options, Vested And Expected To Vest, Outstanding, Weighted Average Exercise Price Revenue from Contract with Customer [Abstract] Contract Liabilities Change In Contract With Customer, Liability [Roll Forward] Change In Contract With Customer, Liability [Roll Forward] Balance, beginning of period Contract with Customer, Liability Revenue recognized Contract with Customer, Liability, Revenue Recognized Increase due to billings Contract With Customer, Liability, Increase From Cash Receipts Contract With Customer, Liability, Increase From Cash Receipts Balance, end of period Short-term contract liabilities (Deferred revenues) Contract with Customer, Liability, Current Long-term contract liabilities (Deferred revenues) Contract with Customer, Liability, Noncurrent Contract Assets Change In Contract With Customer, Asset [Roll Forward] Change In Contract With Customer, Asset [Roll Forward] Balance, beginning of period Contract with Customer, Asset, Net Amount recognized Contract with Customer, Asset, Reclassified to Receivable Increase Contract With Customer, Asset, New Contract Additions Contract With Customer, Asset, New Contract Additions Balance, end of period Statement of Comprehensive Income [Abstract] Net loss Net Income (Loss) Attributable to Parent Other comprehensive loss: 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 Business Combinations [Abstract] Schedule of Business Acquisitions, by Acquisition [Table] Schedule of Business Acquisitions, by Acquisition [Table] Measurement Input Type [Axis] Measurement Input Type [Axis] Measurement Input Type [Domain] Measurement Input Type [Domain] Measurement Input, Discount Rate Measurement Input, Discount Rate [Member] Business Acquisition [Axis] Business Acquisition [Axis] Business Acquisition, Acquiree [Domain] Business Acquisition, Acquiree [Domain] SunPower’s SunPower’s [Member] SunPower’s [Member] Scenario [Axis] Scenario [Axis] Scenario, Unspecified [Domain] Scenario, Unspecified [Domain] Forecast Scenario, Forecast [Member] Range [Axis] Range [Axis] Range [Domain] Range [Domain] Minimum Minimum [Member] Maximum Maximum [Member] Developed technology Customer relationship Customer Relationships [Member] Business Acquisition [Line Items] Business Acquisition [Line Items] Agreement for exclusive supplier rights, period Business Combination, Supply Agreement, Period Business Combination, Supply Agreement, Period Consideration transfered for business acquisition Business Combination, Consideration Transferred Cash consideration Payments to Acquire Businesses, Gross Common stock issued for business acquisition (in shares) Business Acquisition, Equity Interest Issued or Issuable, Number of Shares Issuance of Common Stock Business Combination, Consideration Transferred, Equity Interests Issued and Issuable Equity, measurement input Business Combination, Consideration Transferred, Equity Interests Issued and Issuable, Measurement Input Business Combination, Consideration Transferred, Equity Interests Issued and Issuable, Measurement Input Limitation for trade or transfer, period Business Combination, Limitation For Trade Or Transfer, Period Business Combination, Limitation For Trade Or Transfer, Period Limitation for number of shares to be transfered by acquiree, period Business Combination, Limitation For Number Of Shares To Be Transfered By Acquiree, Period Business Combination, Limitation For Number Of Shares To Be Transfered By Acquiree, Period Goodwill Goodwill Amortization period for acquired intangible assets Acquired Finite-lived Intangible Assets, Weighted Average Useful Life Cash purchase price allocated in cash flows from operating activities Net Cash Provided by (Used in) Investing Activities Acquisition funded by issuance of common stock Stock Issued Acquisition funded by accrued liabilities Business Combination, Accrued Consideration Transferred Business Combination, Accrued Consideration Transferred Cash purchase price allocated in cash flows from investing activities Net Cash Provided by (Used in) Operating Activities Total acquisition related costs Business Acquisition, Transaction Costs 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 ACQUISITION Business Combination Disclosure [Text Block] Summary of Revenue Disaggregation Disaggregation of Revenue [Table Text Block] Summary of Contract Assets and Contract Liabilities, and Changes in Balances from Contracts with Customers Contract with Customer, Asset and Liability [Table Text Block] Summary of Estimated Revenue Expected to be Recognized in Future Periods Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table Text Block] Summary of New Accounting Adoption Impact on Consolidated Statements of Income and Condensed Consolidated Balance Sheets Schedule of New Accounting Pronouncements and Changes in Accounting Principles [Table Text Block] Commitments and Contingencies Disclosure [Abstract] COMMITMENTS AND CONTINGENCIES Commitments and Contingencies Disclosure [Text Block] Debt Disclosure [Abstract] Schedule of Debt Schedule of Debt [Table Text Block] Schedule of Maturities of Long-term Debt Schedule of Maturities of Long-term Debt [Table Text Block] Loss Contingencies [Table] Loss Contingencies [Table] Loss Contingencies [Line Items] Loss Contingencies [Line Items] Accrual for legal settlements Loss Contingency Accrual Accrual for legal settlements Loss Contingency Accrual, Payments Lease term Lessee, Operating Lease, Term of Contract Lease renewal option Lessee, Operating Lease, Renewal Term Remaining facility lease obligation Lessee, Operating Lease, Liability, Payments, Due Cash paid for business acquisition Payments to Acquire Businesses, Net of Cash Acquired Additional cash consideration, period Business Combination, Consideration Transferred, Additional Cash Payable, Period Business Combination, Consideration Transferred, Additional Cash Payable, Period 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] Secured Debt Secured Debt [Member] Debt Instrument [Axis] Debt Instrument [Axis] Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Second Amendment To Term Loans Second Amendment To Term Loans [Member] Second Amendment To Term Loans [Member] Debt Instrument [Line Items] Debt Instrument [Line Items] 2018 (remaining 3 months) Long-term Debt, Maturities, Repayments of Principal, Remainder of Fiscal Year 2019 Long-term Debt, Maturities, Repayments of Principal in Year Two 2020 Long-term Debt, Maturities, Repayments of Principal in Year Three Total Long-term Debt, Gross Stock options Employee Stock Option [Member] 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] Weighted average grant date fair value (in usd per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value 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 Schedule of Goodwill and Intangible Assets Schedule of Intangible Assets and Goodwill [Table Text Block] Revenue, Initial Application Period Cumulative Effect Transition [Table] Revenue, Initial Application Period Cumulative Effect Transition [Table] Initial Application Period Cumulative Effect Transition [Axis] Initial Application Period Cumulative Effect Transition [Axis] Initial Application Period Cumulative Effect Transition [Domain] Initial Application Period Cumulative Effect Transition [Domain] Adjustments Difference between Revenue Guidance in Effect before and after Topic 606 [Member] Adjustments for New Accounting Pronouncements [Axis] Adjustments for New Accounting Pronouncements [Axis] Type of Adoption [Domain] Type of Adoption [Domain] Accounting Standards Update 2014-09 Accounting Standards Update 2014-09 [Member] Envoy Communications Device and Enlighten Service Envoy Communications Device And Enlighten Service [Member] Envoy Communications Device And Enlighten Service [Member] Monitoring Hardware and Service Monitoring Hardware And Service [Member] Monitoring Hardware And Service [Member] Envoy Communications Gateway Envoy Communications Gateway [Member] Envoy Communications Gateway [Member] Communication Accessories Communication Accessories [Member] Communication Accessories [Member] Capitalized Contract Cost [Axis] Capitalized Contract Cost [Axis] Capitalized Contract Cost [Domain] Capitalized Contract Cost [Domain] Incurred Commissions Incurred Commissions [Member] Incurred Commissions [Member] Timing of Transfer of Good or Service [Axis] Timing of Transfer of Good or Service [Axis] Timing of Transfer of Good or Service [Domain] Timing of Transfer of Good or Service [Domain] Products and services transferred over time Transferred over Time [Member] Products transferred at a point in time Transferred at Point in Time [Member] Revenue, Initial Application Period Cumulative Effect Transition [Line Items] Revenue, Initial Application Period Cumulative Effect Transition [Line Items] Accumulated deficit reduction (increase) Retained Earnings (Accumulated Deficit) Net increase in revenues Revenue from Contract with Customer, Excluding Assessed Tax Number of accounting units (accounting unit) Number of Accounting Units Number of Accounting Units Increase in deferred revenue Increase in deferred costs Capitalized Contract Cost, Net Unbilled revenue Unbilled Contracts Receivable Accrued liabilities Accrued Liabilities, Current Amortization period for capitalized costs Capitalized Contract Cost, Amortization Period Revenue recognition period Revenue, Remaining Performance Obligation, Optional Exemption, Remaining Duration Contract asset impairment charges Capitalized Contract Cost, Impairment Loss GOODWILL AND INTANGIBLE ASSETS Goodwill and Intangible Assets Disclosure [Text Block] STOCK-BASED COMPENSATION Disclosure of Compensation Related Costs, Share-based Payments [Text Block] Fair Value Measurement Inputs and Valuation Techniques [Table] Fair Value Measurement Inputs and Valuation Techniques [Table] Measurement Input, Profit Element and Risk Premium Measurement Input, Profit Element And Risk Premium [Member] Measurement Input, Profit Element And Risk Premium [Member] Measurement Input, Entity Credit Risk Measurement Input, Entity Credit Risk [Member] Measurement Input, Counterparty Credit Risk Measurement Input, Counterparty Credit Risk [Member] Eligible Item or Group for Fair Value Option [Axis] Financial Instrument [Axis] Fair Value, Option, Eligible Item or Group [Domain] Financial Instruments [Domain] Warranty obligations for microinverters sold since January 1, 2014 Fair Value Measurement Inputs and Valuation Techniques [Line Items] Fair Value Measurement Inputs and Valuation Techniques [Line Items] Warranty obligations for microinverters sold since January 1, 2014 Product Warranty Obligations, Measurement Input Product Warranty Obligations, Measurement Input Third party option to purchase receivables at a discount Third Party Option To Purchase Receivables At Discount, Measurement Input Third Party Option To Purchase Receivables At Discount, Measurement Input Performance Shares Performance Shares [Member] Performance Shares with Market Conditions Performance Shares With Market Conditions [Member] Performance Shares With Market Conditions [Member] Restricted stock Restricted Stock [Member] Intrinsic value of options exercised Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic 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 Award granted (in shares) Performance target percentage Share-based Compensation Arrangement by Share-based Payment Award, Performance Target, Percentage Share-based Compensation Arrangement by Share-based Payment Award, Performance Target, Percentage Weighted average estimated fair value of award (in usd per share) Common stock to be purchased in exchange for options (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period 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 Product Warranties Disclosures [Abstract] Warranty obligations Standard and Extended Product Warranty Accrual Without Adoption of Topic 606 Calculated under Revenue Guidance in Effect before Topic 606 [Member] 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 Restructuring charges Restructuring, Settlement and Impairment Provisions Total operating expenses Operating Expenses Loss from operations Operating Income (Loss) Other expense, net Other Nonoperating Income (Expense) [Abstract] Interest expense Interest Expense Other expense Other Nonoperating Income (Expense) Total other expense, net Nonoperating Income (Expense) Loss before income taxes Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Income tax provision Income Tax Expense (Benefit) Net loss per share: Earnings Per Share, Basic and Diluted [Abstract] Basic and diluted (in usd per share) Income (Loss) from Continuing Operations, Per Basic and Diluted Share Shares used in per share calculation: Earnings Per Share, Basic and Diluted, Other Disclosures [Abstract] Basic and diluted (in shares) Weighted Average Number of Shares Outstanding, Basic and Diluted Basis of Presentation and Consolidation Basis of Accounting, 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] Recently Adopted Accounting Pronouncements and Recently Issued Accounting Pronouncements Not Yet Effective New Accounting Pronouncements, Policy [Policy Text Block] Fair Value Measurements Fair Value Measurement, Policy [Policy Text Block] Options for Warranty Obligations Standard Product Warranty, Policy [Policy Text Block] Commitments and Contingencies Commitments and Contingencies, Policy [Policy Text Block] Income Taxes Income Tax, Policy [Policy Text Block] Earnings Per Share Earnings Per Share, Policy [Policy Text Block] Subsequent Events [Abstract] Cash Purchase Price Payments To Acquire Business, Total Gross Amount Payments To Acquire Business, Total Gross Amount Common stock issued Total RESTRUCTURING Restructuring and Related Activities Disclosure [Text Block] Geographical [Axis] Geographical [Axis] Geographical [Domain] Geographical [Domain] United States UNITED STATES International Non-US [Member] Earnings Per Share [Abstract] Numerator: Net Income (Loss) Attributable to Parent [Abstract] Denominator: Weighted Average Number of Shares Outstanding, Diluted [Abstract] Weighted average common shares outstanding (in shares) Net loss per share, basic and diluted (in usd per share) DEBT Short-term Debt [Text Block] Equity [Abstract] SALE OF COMMON STOCK Stockholders' Equity Note Disclosure [Text Block] Summary of consideration transfered for business acquisition Schedule of Business Acquisitions, by Acquisition [Table Text Block] Summary of fair values of assets acquired and liabilities assumed Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block] Summary of identifiable intangible assets acquired Finite-Lived and Indefinite-Lived Intangible Assets Acquired as Part of Business Combination [Table Text Block] Employee Severance and Benefits Lease Loss Reserves and Contractual Obligations Contract Termination [Member] Restructuring Reserve [Roll Forward] Restructuring Reserve [Roll Forward] Beginning balance Restructuring Reserve Charges Restructuring Costs and Asset Impairment Charges Cash payments Payments for Restructuring Non-cash settlement and other Restructuring Reserve, Settled without Cash Ending balance Schedule of Short-term Debt [Table] Schedule of Short-term Debt [Table] Counterparty Name [Axis] Counterparty Name [Axis] Counterparty Name [Domain] Counterparty Name [Domain] Thurman John Rodgers Thurman John Rodgers [Member] Thurman John Rodgers [Member] Convertible Notes Payable Convertible Notes Payable [Member] Line of Credit Line of Credit [Member] Financing Receivable Financing Receivable [Member] Convertible Senior Notes Due 2023 Convertible Senior Notes Due 2023 [Member] Convertible Senior Notes Due 2023 [Member] Amended Term Loan Agreement, February 2017 Amended Tennenbaum Capital Partners LLC Agreement [Member] Amended Tennenbaum Capital Partners LLC Agreement [Member] Term Loan Agreement, July 2016 Term Loan Agreement, July 2016 [Member] Term Loan Agreement, July 2016 [Member] Financing Receivable Recorded as Debt Financing Receivable Recorded As Debt [Member] Financing Receivable Recorded As Debt [Member] Lender Name [Axis] Lender Name [Axis] Line of Credit Facility, Lender [Domain] Line of Credit Facility, Lender [Domain] Tennenbaum Capital Partners, LLC Tennenbaum Capital Partners, LLC [Member] Tennenbaum Capital Partners, LLC [Member] Wells Fargo Bank Wells Fargo Bank [Member] Wells Fargo Bank. Credit Facility [Axis] Credit Facility [Axis] Credit Facility [Domain] Credit Facility [Domain] Revolving Credit Facility Revolving Credit Facility [Member] Variable Rate [Axis] Variable Rate [Axis] Variable Rate [Domain] Variable Rate [Domain] LIBOR London Interbank Offered Rate (LIBOR) [Member] Debt Covenant Terms [Axis] Debt Covenant Terms [Axis] Debt Covenant Terms [Axis] Debt Covenant Terms [Domain] Debt Covenant Terms [Domain] [Domain] for Debt Covenant Terms [Axis] Closing Date to March 31, 2018 Closing Date to March 31, 2018 [Member] Closing Date to March 31, 2018 [Member] April 1, 2018 and Thereafter April 1, 2019 and Thereafter [Member] April 1, 2019 and Thereafter [Member] Measurement Input, Quoted Price Measurement Input, Quoted Price [Member] Measurement Input, Share Price Measurement Input, Share Price [Member] Measurement Input, Price Volatility Measurement Input, Price Volatility [Member] Measurement Input, Risk Free Interest Rate Measurement Input, Risk Free Interest Rate [Member] Measurement Input, Expected Dividend Rate Measurement Input, Expected Dividend Rate [Member] Measurement Input, Expected Term Measurement Input, Expected Term [Member] Shareholders' Equity Class [Axis] Shareholders' Equity Class [Axis] Fair Value by Shareholders' Equity Class [Domain] Fair Value by Shareholders' Equity Class [Domain] Cashless Exercise Warrants Warrants Not Settleable in Cash [Member] Short-term Debt [Line Items] Short-term Debt [Line Items] Debt instrument face amount Debt Instrument, Face Amount Proceeds from issuance of debt Proceeds from Issuance of Debt Debt underwriter fees Debt Instrument, Fee Amount Debt issuance costs Debt Issuance Costs, Gross Interest rate Debt Instrument, Interest Rate, Stated Percentage Principal amount multiples Debt Instrument, Convertible, Principal Amount Multiples Debt Instrument, Convertible, Principal Amount Multiples Conversion rate of common stock (in dollars per share) Debt Instrument, Convertible, Conversion Rate Debt Instrument, Convertible, Conversion Rate Debt conversion price (in usd per share) Debt Instrument, Convertible, Conversion Price Redemption price percentage Debt Instrument, Redemption Price, Percentage Unamortized issuance costs and debt discounts Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net Proceeds from debt Proceeds from Issuance of Long-term Debt Interest rate during period Line of Credit Facility, Interest Rate During Period Reduction of interest rate during period Line of Credit Facility, Reduction of Interest Rate During Period, Percent Line of Credit Facility, Reduction of Interest Rate During Period, Percent Commitment fee percentage Line of Credit Facility, Commitment Fee Percentage Closing fee Line of Credit Facility, Closing Fee, Percentage Line of Credit Facility, Closing Fee, Percentage Prepayment fee Line of Credit Facility, Prepayment Fee, Percent Line of Credit Facility, Prepayment Fee, Percent Payments under revolving credit facility Repayments of Lines of Credit Basis spread on variable rate Debt Instrument, Basis Spread on Variable Rate Percent decrease in principal payments Debt Instrument, Decrease In Principal Payments Amounts Required, Percentage Debt Instrument, Decrease In Principal Payments Amounts Required, Percentage Unrestricted cash Debt Instrument, Covenant, Unrestricted Cash Requirement, Minimum Debt Instrument, Covenant, Unrestricted Cash Requirement, Minimum Liquidity ratio required Debt Instrument, Covenant, Liquidity Ratio Required, Minimum Debt Instrument, Covenant, Liquidity Ratio Required, Minimum Number of securities called by warrants (in shares) Class of Warrant or Right, Number of Securities Called by Warrants or Rights Warrants and rights, measurement input Warrants and Rights Outstanding, Measurement Input Class of warrant term year Class Of Warrant Or Right, Term Class Of Warrant Or Right, Term Warrants and rights outstanding, term Warrants and Rights Outstanding, Term Fair value of warrants issued Warrants Not Settleable in Cash, Fair Value Disclosure Value of future purchase option Liability, Purchase Option For Receivables, Fair Value Liability, Purchase Option For Receivables, Fair Value Maximum borrowing capacity Line of Credit Facility, Maximum Borrowing Capacity Revolving credit facility Line of Credit, Current Carrying amount of long term debt Less unamortized discount and issuance costs Less value of future purchase option Debt Instrument, Value Of Future Purchase Option Debt Instrument, Value Of Future Purchase Option Total carrying amount of debt Long-term Debt Debt, current Long-term Debt, Current Maturities Debt, noncurrent Long-term Debt, Excluding Current Maturities Statement of Financial Position [Abstract] 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 $2,167 and $2,378 at September 30, 2018 and December 31, 2017, respectively Accounts Receivable, Net, Current Inventory Prepaid expenses and other 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) 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 Deferred revenues, current Warranty obligations, current (includes $4,110 and $2,240 measured at fair value at September 30, 2018 and December 31, 2017, respectively) Product Warranty Accrual, Current Debt, current Total current liabilities Liabilities, Current Long-term liabilities: Liabilities, Noncurrent [Abstract] Deferred revenues, noncurrent Warranty obligations, noncurrent (includes $9,456 and $7,551 measured at fair value at September 30, 2018 and December 31, 2017, respectively) Product Warranty Accrual, Noncurrent Other liabilities Other Liabilities, 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, 150,000 shares and 125,000 shares authorized; and 106,322 and 85,914 shares issued and outstanding at September 30, 2018 and December 31, 2017, respectively Common Stock, Value, Issued Additional paid-in capital Additional Paid in Capital Accumulated deficit Accumulated other comprehensive loss Accumulated Other Comprehensive Income (Loss), Net of Tax Total stockholders’ equity (deficit) Stockholders' Equity Attributable to Parent Total liabilities and stockholders’ equity Liabilities and Equity 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] Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [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 Summary of Stock Option Activity Share-based Compensation, Stock Options, Activity [Table Text Block] Summary of Restricted Stock Unit Activity Schedule of Share-based Compensation, Restricted Stock Units Award Activity [Table Text Block] Summary of the Components of Total Stock-Based Compensation Expense Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table Text Block] Summary of Stock-Based Compensation Associated with Each Type of Award Schedule of Compensation Cost for Share-based Payment Arrangements, Allocation of Share-based Compensation Costs by Plan [Table Text Block] Summary of the Weighted-Average Grant Date Fair Value of Options Granted Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] Total estimated revenue expected to be recognized in future periods Revenue, Remaining Performance Obligation, Amount Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis] Total estimated revenue expected to be recognized in future periods, expected timing Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period Subsidiary or Equity Method Investee, Sale of Stock by Subsidiary or Equity Investee [Table] Subsidiary or Equity Method Investee, Sale of Stock by Subsidiary or Equity Investee [Table] Sale of Stock [Axis] Sale of Stock [Axis] Sale of Stock [Domain] Sale of Stock [Domain] Private Placement Private Placement [Member] Subsidiary, Sale of Stock [Line Items] Subsidiary, Sale of Stock [Line Items] Number of shares issued (in shares) Sale of Stock, Number of Shares Issued in Transaction Price per share issued (in usd per share) Sale of Stock, Price Per Share Proceeds from issuance of common stock Proceeds from Issuance of Common Stock 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 RSUs and PSUs Stock Compensation Plan [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] Total (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Income Statement [Abstract] Interest expense Other income (expense) Income tax (provision) benefit Net loss 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 at beginning of period 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 Changes in estimates Fair Value, Measurement with Unobservable Inputs Reconciliations, Recurring Basis, Liability, Change in Estimate Fair Value, Measurement with Unobservable Inputs Reconciliations, Recurring Basis, Liability, Change in Estimate Settlements Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Settlements 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, Increase (Decrease) in Other Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Increase (Decrease) in Other Balance at end of period Number of Shares Outstanding Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] Outstanding, beginning balance (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) Outstanding, ending balance (in shares) Vested and expected to vest (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Number Exercisable (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Number Weighted- Average Exercise Price per Share Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract] Outstanding, beginning balance (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, ending balance (in usd per share) Vested and expected (in usd per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Exercise Price Exercisable (in usd per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Weighted Average Exercise Price Summary of Inventory Schedule of Inventory, Current [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 Preferred stock, par value (in usd per share) Preferred Stock, Par or Stated Value Per Share Preferred stock, shares authorized (in shares) Preferred Stock, Shares Authorized Preferred stock, shares issued (in shares) Preferred Stock, Shares Issued Preferred stock, shares outstanding (in shares) Preferred Stock, Shares Outstanding Common stock, par value (in usd per share) Common Stock, Par or Stated Value Per Share Common stock, shares authorized (in shares) Common Stock, Shares Authorized Common stock, shares issued (in shares) Common Stock, Shares, Issued Common stock, shares outstanding (in shares) Common Stock, Shares, Outstanding Intangible assets Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill Useful life (in years) WARRANTY OBLIGATIONS Product Warranty Disclosure [Text Block] Schedule of Assets and Liabilities Measured at Fair Value on a Recurring Basis Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] Schedule of Changes in Nonfinancial Liabilities Related to Warrant Obligations Measured at Fair Value on a Recurring Basis Using Significant Unobservable Inputs Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] Summary of Significant Unobservable Inputs used in the Fair Value Measurement of Liabilities Designated as Level 3 Fair Value, Assets and Liabilities Measured on Nonrecurring Basis, Valuation Techniques [Table Text Block] FAIR VALUE MEASUREMENTS Fair Value Disclosures [Text Block] NET LOSS PER SHARE Earnings Per Share [Text Block] Stock options and RSUs and PSUs Employee Stock Options and Restricted Stock Units [Member] Employee Stock Options and Restricted Stock Units [Member] Employee stock purchase plan Employee Stock [Member] REVENUE RECOGNITION Revenue from Contract with Customer [Text Block] INVENTORY Inventory Disclosure [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 Current Fiscal Year End Date Entity Filer Category Entity Filer Category Entity Emerging Growth Company Entity Emerging Growth Company Entity Small Business Entity Small Business Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Changes in the Company's product warranty liability Movement in Standard and Extended Product Warranty Accrual, Increase (Decrease) [Roll Forward] Warranty obligations, beginning of period Accruals for warranties issued during period Standard Product Warranty Accrual, Increase for Warranties Issued Changes in estimates Standard and Extended Product Warranty Accrual, Increase (Decrease) for Preexisting Warranties Settlements Standard Product Warranty Accrual, Decrease for Payments Increase due to accretion expense Product Warranty Accrual, Accretion Expense Product Warranty Accrual, Accretion Expense Other Standard and Extended Product Warranty Accrual, Period Increase (Decrease) Warranty obligations, end of period Less current portion Noncurrent Statement of Cash Flows [Abstract] Cash flows from operating activities: Net Cash Provided by (Used in) Operating Activities [Abstract] Net loss Adjustments to reconcile net 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 and amortization Depreciation, Depletion and Amortization Provision for doubtful accounts Provision for Doubtful Accounts Asset impairment charges Asset Impairment Charges Amortization of debt issuance costs Amortization of Debt Issuance 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 Increase (Decrease) in Intangible Assets, Current Increase (Decrease) in Intangible Assets, Current Accounts payable, accrued and other 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 Contract with Customer, Liability 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 Acquisition Net cash used in investing activities Cash flows from financing activities: Net Cash Provided by (Used in) Financing Activities [Abstract] Proceeds from issuance of common stock, net of issuance costs Principal payments on term debt Repayments of Long-term Debt Payments under revolving credit facility 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 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 increase 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 fixed assets included in accounts payable Capital Expenditures Incurred but Not yet Paid Warrants issued in connection with debt Summary of Warranty Activities Schedule of Product Warranty Liability [Table Text Block] Receivables Short-term contract assets (Prepaid expenses and other assets) Contract with Customer, Asset, Net, Current Long-term contract assets (Other assets) Contract with Customer, Asset, Net, Noncurrent Patents and licensed technology Patents And Licensed Technology [Member] Patents And Licensed Technology [Member] Goodwill, Gross Goodwill, Gross Goodwill, Additions Goodwill, Acquired During Period Goodwill, Net Intangible Assets, Net (Excluding Goodwill) [Abstract] Intangible Assets, Net (Excluding Goodwill) [Abstract] Other indefinite-lived intangibles, Gross Indefinite-lived Intangible Assets (Excluding Goodwill) Other indefinite-lived intangibles, Acquired Indefinite-lived Intangible Assets Acquired Intangible assets with finite lives: Finite-Lived Intangible Assets, Net [Abstract] Gross Finite-Lived Intangible Assets, Gross Additions Finite-lived Intangible Assets Acquired Accumulated Amortization Finite-Lived Intangible Assets, Accumulated Amortization Net Finite-Lived Intangible Assets, Net Net assets acquired Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets Developed technology and goodwill Developed Technology And Goodwill [Member] Developed Technology And Goodwill [Member] Concentration Risk, Percentage Concentration Risk, Percentage Schedule of Computation of Basic and Diluted Net Loss Per Share Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Schedule of Potentially Dilutive Securities Excluded from the Computation of Diluted Net Loss Per Share Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block] Income Tax Disclosure [Abstract] INCOME TAXES Income Tax Disclosure [Text Block] Increase in liability as a result of decreasing the profit element and risk premium input by 100 basis points Warranty Obligations At Fair Value, Increase In Fair Value Liability, Resulting From One Percentage Point Increase In Profit Element And Risk Premium Warranty Obligations At Fair Value, Increase In Fair Value Liability, Resulting From One Percentage Point Increase In Profit Element And Risk Premium Decrease in liability as a result of increasing the profit element and risk premium input by 100 basis points Warranty Obligations At Fair Value, Decrease In Fair Value Liability, Resulting From One Percentage Point Decrease In Profit Element And Risk Premium Warranty Obligations At Fair Value, Decrease In Fair Value Liability, Resulting From One Percentage Point Decrease In Profit Element And Risk Premium Increase to fair value measurement as a result of 100 basis point decrease Warranty Obligations At Fair Value, Increase In Fair Value Resulting From One Percentage Point Decrease In Discount Rate Warranty Obligations At Fair Value, Increase In Fair Value Resulting From One Percentage Point Decrease In Discount Rate Decrease to fair value measurement as a result of 100 basis point increase Warranty Obligations at Fair Value, Decrease in Fair Value Resulting from One Percentage Point Increase in Discount Rate Warranty Obligations at Fair Value, Decrease in Fair Value Resulting from One Percentage Point Increase in Discount Rate