Statement of Cash Flows [Abstract] Cash flows from operating activities: Net Cash Provided by (Used in) Operating Activities [Abstract] Net income Net Income (Loss) Attributable to Parent Adjustments to reconcile net income to net cash provided by 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 Accounts Receivable, Credit Loss Expense (Reversal) Non-cash interest expense Amortization of Debt Issuance Costs and Discounts Financing fees on extinguishment of debt Gain (Loss) on Extinguishment of Debt Stock-based compensation Share-based Payment Arrangement, Noncash Expense Change in fair value of derivatives Gain (Loss) on Derivative Instruments, Net, Pretax Deferred income taxes Increase (Decrease) in Deferred Income Taxes 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 Warranty obligations Increase (Decrease) In Warranty Obligations Increase (Decrease) In Warranty Obligations Deferred revenues Increase (Decrease) in Contract with Customer, Liability Net cash provided by 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] Issuance of convertible notes, net of issuance costs Proceeds from Convertible Debt, Net of Issuance Costs Proceeds from Convertible Debt, Net of Issuance Costs Purchase of convertible note hedges Payments for Hedge, Financing Activities Sale of warrants Proceeds from Issuance of Warrants Principal payments and financing fees on debt Repayments of Long-term Debt Proceeds from exercise of equity awards and employee stock purchase plan Proceeds, Issuance of Shares, Share-based Payment Arrangement, Including Option Exercised Payment of withholding taxes related to net share settlement of equity awards Payment, Tax Withholding, Share-based Payment Arrangement Net cash provided by (used in) financing activities Net Cash Provided by (Used in) Financing Activities Effect of exchange rate changes on cash and cash equivalents Effect of Exchange Rate on Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents Net increase (decrease) in cash, cash equivalents, and restricted cash Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect Cash, cash equivalents and restricted cash—Beginning of period Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents Cash, cash equivalents and restricted cash—End of period Reconciliation of cash, cash equivalents, and restricted cash to the condensed consolidated balance sheets Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents [Abstract] Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Restricted cash Restricted Cash Total cash, cash equivalents, and restricted cash Supplemental disclosures of non-cash investing and financing activities: Additional Cash Flow Elements and Supplemental Cash Flow Information [Abstract] Purchases of fixed assets included in accounts payable Capital Expenditures Incurred but Not yet Paid Convertible senior note issuance costs included in accounts payable and accrued expense Convertible Senior Note Issuance Costs Included In Accounts Payable And Accrued Expense Convertible Senior Note Issuance Costs Included In Accounts Payable And Accrued Expense Fair Value Disclosures [Abstract] Fair Value Measurements Fair Value Disclosures [Text Block] Earnings Per Share [Abstract] Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Debt Instrument [Axis] Debt Instrument [Axis] Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Convertible Senior Notes Due 2024 Convertible Senior Note Due 2024 [Member] Convertible Senior Note Due 2024 [Member] Long-term Debt, Type [Axis] Long-term Debt, Type [Axis] Long-term Debt, Type [Domain] Long-term Debt, Type [Domain] Convertible Notes Convertible Notes Payable [Member] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Debt conversion price (in USD per share) Debt Instrument, Convertible, Conversion Price Goodwill and Intangible Assets Disclosure [Abstract] GOODWILL AND INTANGIBLE ASSETS Goodwill and Intangible Assets Disclosure [Text Block] Income Statement [Abstract] Net revenues Revenue from Contract with Customer, Excluding Assessed Tax 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 Charges Total operating expenses Operating Expenses Income from operations Operating Income (Loss) Other income (expense), net Other Nonoperating Income (Expense) [Abstract] Interest income Interest Income, Deposits with Financial Institutions Interest expense Interest Expense Other expense, net Other Nonoperating Income (Expense) Change in fair value of derivatives Total other income (expense), net Nonoperating Income (Expense) Income before income taxes Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Income tax benefit (provision) Income Tax Expense (Benefit) Net income Net income per share: Earnings Per Share, Basic and Diluted [Abstract] Basic (in USD per share) Income (Loss) from Continuing Operations, Per Basic Share Diluted (in USD per share) Income (Loss) from Continuing Operations, Per Diluted Share Shares used in per share calculation: Earnings Per Share, Basic and Diluted, Other Disclosures [Abstract] Basic (in shares) Weighted Average Number of Shares Outstanding, Basic Diluted (in shares) Weighted Average Number of Shares Outstanding, Diluted Convertible Senior Notes Due 2023 Convertible Senior Notes Due 2023 [Member] Convertible Senior Notes Due 2023 [Member] Convertible Notes Payable Antidilutive Securities [Axis] Antidilutive Securities [Axis] Antidilutive Securities, Name [Domain] Antidilutive Securities, Name [Domain] Employee stock options Share-based Payment Arrangement, Option [Member] RSUs and PSUs Share-based Payment Arrangement [Member] Antidilutive securities (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Debt Disclosure [Abstract] Schedule of Long-term Debt Instruments [Table] Schedule of Long-term Debt Instruments [Table] Debt Instrument, Redemption, Period [Axis] Debt Instrument, Redemption, Period [Axis] Debt Instrument, Redemption, Period [Domain] Debt Instrument, Redemption, Period [Domain] Period One Debt Instrument, Redemption, Period One [Member] Period Two Debt Instrument, Redemption, Period Two [Member] Convertible Senior Notes Due 2025 Convertible Senior Notes Due 2025 [Member] Convertible Senior Notes Due 2025 [Member] Debt Instrument [Line Items] Debt Instrument [Line Items] Debt instrument face amount Debt Instrument, Face Amount Interest rate Debt Instrument, Interest Rate, Stated Percentage Conversion ratio Debt Instrument, Convertible, Conversion Ratio Proceeds from convertible debt Proceeds from Convertible Debt Number of threshold trading days Debt Instrument, Convertible, Threshold Trading Days Number of consecutive trading days Debt Instrument, Convertible, Threshold Consecutive Trading Days Measurement period percentage of stock price trigger Debt Instrument, Convertible, Measurement Period Percentage Of Stock Price Trigger Debt Instrument, Convertible, Measurement Period Percentage Of Stock Price Trigger Threshold percentage Debt Instrument, Convertible, Threshold Percentage of Stock Price Trigger Convertible notes embedded derivative Embedded Derivative, Fair Value of Embedded Derivative Liability Embedded derivative, host contract Embedded Derivative, Host Contract Embedded Derivative, Host Contract Effective percentage rate Debt Instrument, Interest Rate, Effective Percentage Debt issuance costs Debt Issuance Costs, Gross Unamortized discount Debt Instrument, Unamortized Discount Remaining discount amortization period Debt Instrument, Convertible, Remaining Discount Amortization Period Payment for bonds hedge Conversion shares (in shares) Debt Instrument, Convertible, Conversion Shares Debt Instrument, Convertible, Conversion Shares Warrants issued, strike price (in USD per share) Class of Warrant or Right, Exercise Price of Warrants or Rights Proceeds from sale of warrants Hedging liabilities Derivative Instruments and Hedges, Noncurrent Warrants liability Warrants and Rights Outstanding Organization, Consolidation and Presentation of Financial Statements [Abstract] Salaries, commissions, incentive compensation and benefits Employee-related Liabilities, Current Customer rebates and sales incentives Accrued Marketing Costs, Current Freight Accrued Freight Costs Accrued Freight Costs Operating lease liabilities, current Operating Lease, Liability, Current Other Other Accrued Liabilities, Current Total accrued liabilities Accrued Liabilities, Current Share-based Payment Arrangement [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] Award Type [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) Number of shares outstanding, expected to vest (in shares) Share-Based Compensation Arrangement By Share-Based Payment Award, Equity Instruments Other Than Options, Expected To Vest, Outstanding, Number Share-Based Compensation Arrangement By Share-Based Payment Award, Equity Instruments Other Than Options, 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) Weighted-Average Fair Value per Share at Grant Date, Expected to vest (in usd per share) Share-Based Compensation Arrangement By Share-Based Payment Award, Equity Instruments Other than Options, Expected To Vest, Outstanding, Weighted Average Exercise Price Share-Based Compensation Arrangement By Share-Based Payment Award, Equity Instruments Other than Options, Expected To Vest, Outstanding, Weighted Average Exercise Price Weighted-Average Remaining Contractual Term Weighted-Average Remaining Contractual Term Share-based Compensation Arrangement by Share-based Payment Award, Weighted-Average Remaining Contractual Term (in years) 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 Expected to vest Share-based Compensation Arrangement by Share-based Payment Award, Other than Options, Expected to Vest, Weighted Average Remaining Contractual Term Share-based Compensation Arrangement by Share-based Payment Award, Other than Options, Expected to Vest, Weighted Average Remaining Contractual Term Aggregate Intrinsic Value Share-based Payment Arrangement, Additional Disclosure [Abstract] Vested Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value Outstanding Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Aggregate Intrinsic Value, Nonvested Aggregate intrinsic value, expected to vest Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Expected to Vest, Intrinsic Value, Value Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Expected to Vest, Intrinsic Value, Value Share price (in usd per share) Share Price Share-based Payment Arrangement, Expensed and Capitalized, Amount [Table] Share-based Payment Arrangement, Expensed and Capitalized, Amount [Table] Income Statement Location [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] Restructuring Restructuring Charges [Member] Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] Total stock-based compensation expense Share-based Payment Arrangement, Expense Total unrecognized compensation cost Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount Weighted-average recognition period for unrecognized compensation cost Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition Product Warranties Disclosures [Abstract] 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 Standard and Extended Product Warranty Accrual 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, Other Period Increase (Decrease) Standard And Extended Product Warranty Accrual, Other Period Increase (Decrease) Warranty obligations, end of period Less: current portion Product Warranty Accrual, Current Noncurrent Product Warranty Accrual, Noncurrent Other Financial Information Supplemental Balance Sheet Disclosures [Text Block] Share-based Payment Arrangement, Option, Exercise Price Range [Table] Share-based Payment Arrangement, Option, Exercise Price Range [Table] Exercise Price Range [Axis] Exercise Price Range [Axis] Exercise Price Range [Domain] Exercise Price Range [Domain] $0.70 —– $1.11 Range One [Member] Range One [Member] $1.29 —– $1.29 Range Two [Member] Range Two [Member] $1.31 —– $1.31 Range Three [Member] Range Three [Member] $1.37 —– $12.57 Range Four [Member] Range Four [Member] $14.58 —– $14.58 Range Five [Member] Range Five [Member] Share-based Payment Arrangement, Option, Exercise Price Range [Line Items] Share-based Payment Arrangement, Option, Exercise Price Range [Line Items] Exercise price range, lower limit (usd per share) Share-based Payment Arrangement, Option, Exercise Price Range, Lower Range Limit Exercise price range, upper limit (usd per share) Share-based Payment Arrangement, Option, Exercise Price Range, Upper Range Limit Options outstanding, number of shares (shares) Share-based Payment Arrangement, Option, Exercise Price Range, Shares Outstanding Options outstanding - weighted- average remaining life Share-based Payment Arrangement, Option, Exercise Price Range, Outstanding, Weighted Average Remaining Contractual Term Options outstanding - weighted- average exercise price (usd per share) Share-based Payment Arrangement, Option, Exercise Price Range, Outstanding, Weighted Average Exercise Price Options exercisable - number of shares exercisable (shares) Share-based Payment Arrangement, Option, Exercise Price Range, Shares Exercisable Options Exercisable - weighted-average exercise price (usd per share) Share-based Payment Arrangement, Option, Exercise Price Range, Exercisable, Weighted Average Exercise Price Summary of Warranty Activities Schedule of Product Warranty Liability [Table Text Block] 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) Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period Outstanding, ending balance (in shares) Shares outstanding, vested and expected to vest (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Number Shares outstanding, exercisable (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, 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) Weighted-average exercise price, 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 Weighted-average exercise price, exercisable (in usd per share) Outstanding Vested and expected to vest Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Remaining Contractual Term Exercisable Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term Exercised Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value Outstanding Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value Vested and expected to vest Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Aggregate Intrinsic Value Exercisable Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value Fair Value Measurement Inputs and Valuation Techniques [Table] Fair Value Measurement Inputs and Valuation Techniques [Table] Measurement Input Type [Axis] Measurement Input Type [Axis] Measurement Input Type [Domain] Measurement Input Type [Domain] Profit element and risk premium Measurement Input, Profit Element And Risk Premium [Member] Measurement Input, Profit Element And Risk Premium [Member] Credit-adjusted risk-free rate Measurement Input, Entity Credit Risk [Member] Measurement Frequency [Axis] Measurement Frequency [Axis] Measurement Frequency [Domain] Measurement Frequency [Domain] Recurring Fair Value, 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] 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 Warranty, Rights and Obligations, Fair Value Option [Member] Fair Value Measurement Inputs and Valuation Techniques [Line Items] Fair Value Measurement Inputs and Valuation Techniques [Line Items] Warranty obligations, measurement input Product Warranty Obligations, Measurement Input Product Warranty Obligations, Measurement Input Statement of Stockholders' Equity [Abstract] Statement [Table] Statement [Table] Equity Components [Axis] Equity Components [Axis] Equity Component [Domain] Equity Component [Domain] Common Stock and Additional Paid-In Capital Common Stock Including Additional Paid in Capital [Member] Accumulated deficit Retained Earnings [Member] Accumulated Other Comprehensive Income (Loss) AOCI Attributable to Parent [Member] Statement [Line Items] Statement [Line Items] Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Balance, beginning of period Stockholders' Equity Attributable to Parent Cumulative-effect adjustment to additional paid in capital and other Cumulative Effect on Retained Earnings, Net of Tax Issuance of common stock from exercise of equity awards Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture Payment of withholding taxes related to net share settlement of equity awards Share-based Payment Arrangement, Decrease for Tax Withholding Obligation Stock-based compensation expense and other APIC, Share-based Payment Arrangement, Increase for Cost Recognition Foreign currency translation adjustments Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss) Arising During Period, Net of Tax Balance, end of period Commitments and Contingencies Disclosure [Abstract] Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract] Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract] 2020 (remaining nine months) Lessee, Operating Lease, Liability, Payments, Remainder of Fiscal Year 2021 Lessee, Operating Lease, Liability, Payments, Due Year Two 2022 Lessee, Operating Lease, Liability, Payments, Due Year Three 2023 Lessee, Operating Lease, Liability, Payments, Due Year Four 2024 Lessee, Operating Lease, Liability, Payments, Due Year Five 2025 and thereafter Lessee, Operating Lease, Liability, Payments, Due after Year Five Total lease payments Lessee, Operating Lease, Liability, Payments, Due Less: imputed lease interest Lessee, Operating Lease, Liability, Undiscounted Excess Amount Total lease liabilities Operating Lease, Liability Revenue from Contract with Customer [Abstract] REVENUE RECOGNITION Revenue from Contract with Customer [Text Block] Contract asset impairment charges Capitalized Contract Cost, Impairment Loss Summary of the Components of Total Stock-Based Compensation Expense Share-based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block] Summary of Stock-Based Compensation Associated with Each Type of Award Share-based Payment Arrangement, Cost by Plan [Table Text Block] Summary of Stock Option Activity Share-based Payment Arrangement, Option, Activity [Table Text Block] Summary of Stock Option Outstanding Share-based Payment Arrangement, Option, Exercise Price Range [Table Text Block] Summary of Restricted Stock Unit Activity Share-based Payment Arrangement, Restricted Stock Unit, Activity [Table Text Block] Share-based Compensation, Performance Shares Award Outstanding Activity Share-based Payment Arrangement, Performance Shares, Outstanding Activity [Table Text Block] Debt converted Debt Conversion, Original Debt, Amount Conversion shares (in shares) Debt Conversion, Converted Instrument, Shares Issued Fees paid for repurchase and exchange of convertible notes Repayments of Convertible Debt Redemption price percentage Debt Instrument, Redemption Price, Percentage Related Party Transactions [Abstract] Schedule of Related Party Transactions, by Related Party [Table] Schedule of Related Party Transactions, by Related Party [Table] Counterparty Name [Axis] Counterparty Name [Axis] Counterparty Name [Domain] Counterparty Name [Domain] Thurman John Rodgers Thurman John Rodgers [Member] Thurman John Rodgers [Member] Related Party Transaction [Line Items] Related Party Transaction [Line Items] Convertible notes hedge, beginning balance Convertible notes hedge, change in the fair value Convertible notes hedge, ending balance Warrants liability, beginning balance Warrants liability, change in fair value Fair Value Adjustment of Warrants Warrants liability, ending balance Operating lease costs Operating Lease, Cost Components of Lease Lease, Cost [Table Text Block] Schedule of Future Minimum Rental Payments for Operating Leases Lessee, Operating Lease, Liability, Maturity [Table Text Block] Operating lease liabilities, current (Accrued liabilities) Operating lease liabilities, noncurrent (Other liabilities) Operating Lease, Liability, Noncurrent Total operating lease liabilities Weighted average remaining lease term Operating Lease, Weighted Average Remaining Lease Term Weighted average discount rate Operating Lease, Weighted Average Discount Rate, Percent Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table] Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table] Liability Class [Axis] Liability Class [Axis] Fair Value by Liability Class [Domain] Fair Value by Liability Class [Domain] Total warranty obligations measured at fair value 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 Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability Value Accruals for warranties issued during period Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Warranties Issued Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Warranties Issued 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 Grants in period (in shares) Contractual interest expense Interest Expense, Debt, Excluding Amortization Amortization of debt discount Amortization of Debt Discount (Premium) Amortization of debt issuance costs Amortization of Debt Issuance Costs Total interest cost recognized Interest Expense, Debt 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] Balance, at beginning of year Accounts Receivable, Allowance for Credit Loss Write-offs, net of recoveries Accounts Receivable, Allowance for Credit Loss, Writeoff Balance, at end of year Cover [Abstract] Document Type Document Type Document Quarterly Report Document Quarterly Report Document Period End Date Document Period End Date Document Transition Report Document Transition Report Entity File Number Entity File Number Entity Registrant Name Entity Registrant Name Entity Incorporation, State Entity Incorporation, State or Country Code Entity Tax Identification Number Entity Tax Identification Number Entity Address, Address Line One Entity Address, Address Line One Entity Address, City or Town Entity Address, City or Town Entity Address, State or Province Entity Address, State or Province Entity Address, Postal Zip Code Entity Address, Postal Zip Code City Area Code City Area Code Local Phone Number Local Phone Number Title of 12(b) Security Title of 12(b) Security Trading Symbol Trading Symbol Security Exchange Name Security Exchange Name Entity Current Reporting Status Entity Current Reporting Status Entity Interactive Data Current Entity Interactive Data Current Entity Filer Category Entity Filer Category Entity Small Business Entity Small Business Entity Emerging Growth Company Entity Emerging Growth Company Entity Shell Company Entity Shell Company Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Entity Central Index Key Entity Central Index Key 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 Restructuring and Related Activities [Abstract] Restructuring and Related Costs Restructuring and Related Costs [Table Text Block] Statement of Financial Position [Abstract] ASSETS Assets [Abstract] Current assets: Assets, Current [Abstract] Cash and cash equivalents Accounts receivable, net of allowances of $374 and $564 at March 31, 2020 and December 31, 2019, respectively Accounts Receivable, after Allowance for Credit Loss, Current Inventory Inventory, Net 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 Operating lease, right of use asset Operating Lease, Right-of-Use Asset Intangible assets, net Intangible Assets, Net (Excluding Goodwill) Goodwill Goodwill Other assets Other Assets, Noncurrent Deferred tax assets, net Deferred Income Tax Assets, Net Convertible notes hedge Total assets Assets LIABILITIES AND STOCKHOLDERS’ EQUITY Liabilities and Equity [Abstract] Current liabilities: Liabilities, Current [Abstract] Accounts payable Accounts Payable, Current Accrued liabilities Deferred revenues, current Contract with Customer, Liability, Current Warranty obligations, current (includes $6,578 and $6,794 measured at fair value at March 31, 2020 and December 31, 2019, respectively) Debt, current Long-term Debt, Current Maturities Total current liabilities Liabilities, Current Long-term liabilities: Liabilities, Noncurrent [Abstract] Deferred revenues, noncurrent Contract with Customer, Liability, Noncurrent Warranty obligations, noncurrent (includes $13,847 and $13,012 measured at fair value at March 31, 2020 and December 31, 2019, respectively) Other liabilities Other Liabilities, Noncurrent Debt, noncurrent Long-term Debt, Excluding Current Maturities Total liabilities Liabilities Commitments and contingent liabilities (Note 9) Commitments and Contingencies Stockholders’ equity: Stockholders' Equity Attributable to Parent [Abstract] Common stock, $0.00001 par value, 150,000 shares and 150,000 shares authorized; and 125,072 shares and 123,109 shares issued and outstanding at March 31, 2020 and December 31, 2019, respectively Common Stock, Value, Issued Additional paid-in capital Additional Paid in Capital Accumulated deficit Retained Earnings (Accumulated Deficit) Accumulated other comprehensive loss Accumulated Other Comprehensive Income (Loss), Net of Tax Total stockholders’ equity Total liabilities and stockholders’ equity Liabilities and Equity Convertible notes embedded derivative Fair Value, Recurring and Nonrecurring [Table] Fair Value, Recurring and Nonrecurring [Table] 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] Assets: Convertible notes hedge Derivative Asset Liabilities: Liabilities [Abstract] Warranty obligations, current Warranty obligations, non-current Total warranty obligations measured at fair value Total liabilities measured at fair value Financial and Nonfinancial Liabilities, Fair Value Disclosure Award Type [Domain] Performance shares Performance Shares [Member] Vested Outstanding Schedule of Restructuring and Related Costs [Table] Schedule of Restructuring and Related Costs [Table] Restructuring Type [Axis] Restructuring Type [Axis] Type of Restructuring [Domain] Type of Restructuring [Domain] Redundancy and employee severance and benefit arrangements Employee Severance [Member] Lease loss reserves 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] Restructuring charges Restructuring reserve, accrual adjustment Restructuring Reserve, Accrual Adjustment Income Tax Disclosure [Abstract] INCOME TAXES Income Tax Disclosure [Text Block] Financing Receivable Financing Receivable [Member] Financing Receivable Recorded as Debt Financing Receivable Recorded As Debt [Member] Financing Receivable Recorded As Debt [Member] Long-term debt, gross Long-term Debt, Gross Less unamortized discount and issuance costs Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net Total carrying amount of debt Long-term Debt Less: current portion of convertible notes and long-term financing receivable recorded as debt Long-term debt Numerator: Net Income (Loss) Attributable to Parent [Abstract] Net income Notes due 2023 interest and financing costs, net Interest on Convertible Debt, Net of Tax Adjusted net income Net Income (Loss) Attributable to Parent, Diluted Denominator: Weighted Average Number of Shares Outstanding, Diluted [Abstract] Weighted average common shares outstanding (in shares) Weighted Average Number of Shares Outstanding, Basic and Diluted Employee stock-based awards (in shares) Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements Warrants (in shares) Incremental Common Shares Attributable to Dilutive Effect of Call Options and Warrants Notes due (in shares) Incremental Common Shares Attributable to Dilutive Effect of Conversion of Debt Securities Weighted average common shares outstanding for diluted calculation (in shares) Net income per share, basic (in USD per share) Net income per share, diluted (in USD per share) Revenue, Initial Application Period Cumulative Effect Transition [Table] Revenue, Initial Application Period Cumulative Effect Transition [Table] Geographical [Axis] Geographical [Axis] Geographical [Domain] Geographical [Domain] United States UNITED STATES International International [Member] International [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 delivered at a point in time Transferred at Point in Time [Member] Products and services delivered over time Transferred over Time [Member] Revenue, Initial Application Period Cumulative Effect Transition [Line Items] Revenue, Initial Application Period Cumulative Effect Transition [Line Items] Financing Receivable Recorded As Debt Proceeds from debt, net of issuance costs Proceeds from Issuance of Long-term Debt COMMITMENTS AND CONTINGENT LIABILITIES Commitments and Contingencies Disclosure [Text Block] Term of lease contract, maximum renewal term Lessee, Operating Lease, Renewal Term Purchase obligation Purchase Obligation Line of Credit Facility [Table] Line of Credit Facility [Table] Credit Facility [Axis] Credit Facility [Axis] Credit Facility [Domain] Credit Facility [Domain] Letter of credit Letter of Credit [Member] Line of Credit Facility [Line Items] Line of Credit Facility [Line Items] Line of credit Line of Credit Facility, Current Borrowing Capacity Collateralized letter of credit Pledged Financial Instruments, Not Separately Reported, Securities for Letter of Credit Facilities Letters of credit outstanding Letters of Credit Outstanding, Amount Allowances, accounts receivable Accounts Receivable, Allowance for Credit Loss, Current Warranty obligations, current at fair value enph_ProductWarrantyAccrualCurrentFairValueDisclosure enph_ProductWarrantyAccrualCurrentFairValueDisclosure Warranty obligations, non-current at fair value enph_ProductWarrantyAccrualNoncurrentFairValueDisclosure enph_ProductWarrantyAccrualNoncurrentFairValueDisclosure 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 Schedule of Debt Schedule of Debt [Table Text Block] Schedule of Fair Value and Change in Fair Value Of Convertible Note Embedded Derivative Schedule of Derivative Instruments [Table Text Block] Schedule of Fair Value Of Convertible Notes Hedge and Warrants Liability Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] Income taxes (benefit) provision Income before income taxes Stock trigger price (in USD per share) Debt Instrument, Convertible, Stock Price Trigger Debt, current Convertible note, liability component Convertible Notes Payable Convertible note, equity component Debt Instrument, Convertible, Carrying Amount of Equity Component Unamortized debt issuance costs Debt Issuance Costs, Net Debt issuance costs, allocated to capital Debt Issuance Costs, Allocated to Capital Debt Issuance Costs, Allocated to Capital Warrants sold (in shares) Class of Warrant or Right, Number of Securities Called by Warrants or Rights Contractual interest expense 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] Developed technology Intellectual Property [Member] Customer relationship Customer Relationships [Member] Finite-Lived Intangible Assets [Line Items] Finite-Lived Intangible Assets [Line Items] Goodwill, Gross Goodwill, Gross 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) Intangible assets with finite lives: Finite-Lived Intangible Assets, Net [Abstract] Gross Finite-Lived Intangible Assets, Gross Accumulated Amortization Finite-Lived Intangible Assets, Accumulated Amortization Net Finite-Lived Intangible Assets, Net Total estimated revenue expected to be recognized in future periods Revenue, Remaining Performance Obligation, Amount Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] Total estimated revenue expected to be recognized in future periods, expected timing Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period Schedule of Goodwill and Intangible Assets Schedule of Intangible Assets and Goodwill [Table Text Block] Schedule of Amortization Expense Finite-lived Intangible Assets Amortization Expense [Table Text Block] NET INCOME PER SHARE Earnings Per Share [Text Block] RELATED PARTY Related Party Transactions Disclosure [Text Block] Operating cash flows from operating leases Operating Lease, Payments Lease liabilities arising from obtaining right-of-use assets Right-of-Use Asset Obtained in Exchange for Operating Lease Liability 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] STOCK-BASED COMPENSATION Share-based Payment Arrangement [Text Block] Business Acquisition [Axis] Business Acquisition [Axis] Business Acquisition, Acquiree [Domain] Business Acquisition, Acquiree [Domain] SunPower’s SunPower’s [Member] SunPower’s [Member] Developed technology, and patents and licensed technology Developed Technology Rights [Member] Customer relationships Amortization of intangible assets Amortization of Intangible Assets Amortization period for acquired intangible assets Acquired Finite-lived Intangible Assets, Weighted Average Useful Life Agreement for exclusive supplier rights, period Business Combination, Supply Agreement, Period Business Combination, Supply Agreement, Period DESCRIPTION OF BUSINESS AND BASIS OF PRESENTATION Organization, Consolidation and Presentation of Financial Statements Disclosure and Significant Accounting Policies [Text Block] Schedule of Accounts Receivable, Net Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block] Schedule of Allowance for Doubtful Accounts Accounts Receivable, Allowance for Credit Loss [Table Text Block] Schedule of Inventory Schedule of Inventory, Current [Table Text Block] Schedule of Accrued Liabilities Schedule of Accrued Liabilities [Table Text Block] Raw materials Inventory, Raw Materials, Gross Finished goods Inventory, Finished Goods, Gross Total inventory DEBT Long-term Debt [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] RESTRUCTURING Restructuring and Related Activities Disclosure [Text Block] Level 1 Fair Value, Inputs, Level 1 [Member] Cash and Cash Equivalents [Axis] Cash and Cash Equivalents [Axis] Cash and Cash Equivalents [Domain] Cash and Cash Equivalents [Domain] Money market funds Money Market Funds [Member] Statistical Measurement [Axis] Statistical Measurement [Axis] Statistical Measurement [Domain] Statistical Measurement [Domain] Minimum Minimum [Member] Maximum Maximum [Member] Cash and cash equivalents Cash and Cash Equivalents, Fair Value Disclosure Notes payable fair value Notes Payable, Fair Value Disclosure Increase in liability as a result of increasing 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 decreasing 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 Decrease in liability as a result of increasing the discount rate by 100 basis points 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 Increase in liability as a result of decreasing the discount rate by 100 basis points 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 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 Short-term contract liabilities (Deferred revenues) Long-term contract liabilities (Deferred revenues) Schedule of Assets and Liabilities Measured at Fair Value on a Recurring Basis 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] Statement of Comprehensive Income [Abstract] Other comprehensive loss: Other Comprehensive Income (Loss), Net of Tax [Abstract] Comprehensive income Comprehensive Income (Loss), Net of Tax, Attributable to Parent 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, after Allowance for Credit Loss Revenue recognized Contract With Customer, Asset, Amount Recognized Contract With Customer, Asset, Amount Recognized Increase Contract With Customer, Asset, New Contract Additions Contract With Customer, Asset, New Contract Additions Balance, end of period 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 WARRANTY OBLIGATIONS Product Warranty Disclosure [Text Block] Basis of Presentation and Consolidation Basis of Accounting, Policy [Policy Text Block] Use of Estimates Use of Estimates, Policy [Policy Text Block] Recently Adopted Accounting Pronouncements New Accounting Pronouncements, Policy [Policy Text Block] Fair Value Measurement Fair Value Measurement, Policy [Policy Text Block] Earnings Per Share Earnings Per Share, Policy [Policy Text Block] Embedded derivative, beginning balance Embedded derivative, change in the fair value Embedded Derivative, Gain (Loss) on Embedded Derivative, Net Embedded derivative, ending balance Accounts receivable Accounts Receivable, before Allowance for Credit Loss, Current Allowance for doubtful accounts Accounts receivable, net