Granted (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period Document Type Document Type Outstanding, beginning balance Outstanding, ending balance Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value Other, net Other Nonoperating Income (Expense) Long-term portion of bank term loan, net Loans Payable to Bank, Noncurrent Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Granted (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross Capitalized acquisition costs Productive Assets Acquisition, Capitalized Acquisition Costs Productive Assets Acquisition, Capitalized Acquisition Costs Convertible preferred stock, par value (in dollars per share) Temporary Equity, Par or Stated Value Per Share Vested (in dollars 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 Total lease assets Lease, Right-of-Use Asset Lease, Right-of-Use Asset Statistical Measurement [Domain] Statistical Measurement [Domain] Liabilities and Stockholders’ Equity: Liabilities and Equity [Abstract] Line of Credit Line of Credit [Member] Lease Obligations Under Topic 840 Leases, Operating [Abstract] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Amortization of right-of use assets Finance Lease, Right-of-Use Asset, Amortization Long-term liabilities Increase (Decrease) in Other Noncurrent Liabilities Security Exchange Name Security Exchange Name Finance leases Finance Lease, Right-of-Use Asset, before Accumulated Amortization (Loss) income from operations Operating Income (Loss) Debt issuance costs Payments of Debt Issuance Costs Total current liabilities Liabilities, Current Prepaid expenses and other current assets Prepaid Expense and Other Assets, Current Beginning balance (in dollars per share) Ending balance (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value Variable Rate [Domain] Variable Rate [Domain] Variable Rate [Axis] Variable Rate [Axis] Commitments and Contingencies (Note 10) Commitments and Contingencies Total undiscounted future minimum lease payments Finance Lease, Liability, Payment, Due Thereafter Share-based Payment Arrangement, Tranche Two [Member] Assets Assets [Abstract] Property, Plant and Equipment [Table] Property, Plant and Equipment [Table] Vesting period Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period Accounting Policies [Abstract] Accounting Policies [Abstract] Thereafter Lessee, Operating Lease, Liability, to be Paid, after Year Five Furniture and fixtures Furniture and Fixtures [Member] Aggregate Intrinsic Value Aggregate Intrinsic Value [Roll Forward] Aggregate Intrinsic Value [Abstract] Entity Address, State or Province Entity Address, State or Province Vested (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period Accounts payable Accounts Payable, Current Schedule of stock option activity Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding and Exercisable [Table Text Block] Convertible preferred stock, issued (in shares) Temporary Equity, Shares Issued Maximum annual dividend payment Debt Instrument, Covenant, Annual Dividend Payment, Maximum Debt Instrument, Covenant, Annual Dividend Payment, Maximum Accumulated deficit Retained Earnings (Accumulated Deficit) Repayment of revolving credit line Repayments of Lines of Credit Operating lease right-of-use assets Operating Lease, Right-of-Use Asset Loss on extinguishment of debt Gain (Loss) on Extinguishment of Debt Product Concentration Risk Product Concentration Risk [Member] 2021 Lessee, Operating Lease, Liability, to be Paid, Year One Monthly vesting Share-based Payment Arrangement, Tranche Five [Member] Share-based Payment Arrangement, Tranche Five Stock options outstanding (in shares) Outstanding, beginning balance (in shares) Outstanding, ending balance (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number 2021 Finance Lease, Liability, to be Paid, Year One 2024 Lessee, Operating Lease, Liability, to be Paid, Year Four Undistributed net income available to unvested restricted stockholders Undistributed Earnings (Loss) Allocated to Participating Securities, Basic Finance leases Assets Held under Capital Leases [Member] New Accounting Pronouncements or Change in Accounting Principle [Line Items] New Accounting Pronouncements or Change in Accounting Principle [Line Items] Customer [Axis] Customer [Axis] Beginning balance (in shares) Ending balance (in shares) Shares, Outstanding Preferred stock, par value $0.0001 per share—500,000 shares authorized, none issued and outstanding Preferred Stock, Value, Issued Total lease cost Lease, Cost Total operating expenses Operating Expenses Building Building [Member] Other comprehensive income, net of tax: Other Comprehensive Income (Loss), Net of Tax [Abstract] Vested and exercisable (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number Raw materials and packaging Inventory, Raw Materials and Supplies, Net of Reserves Common stock, par value (in dollars per share) Common Stock, Par or Stated Value Per Share Debt extinguishment costs Payment for Debt Extinguishment or Debt Prepayment Cost Finance lease obligations and other long-term liabilities Other Liabilities, Noncurrent Principal payments under finance lease obligations Finance Lease, Principal Payments 2023 Capital Leases, Future Minimum Payments Due in Four Years Work in process Inventory, Work in Process, Net of Reserves Share-based compensation for equity classified awards APIC, Share-based Payment Arrangement, Increase for Cost Recognition Foodservice Sales Channel, Through Intermediary [Member] Cancelled/Forfeited (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period Inventory Total Inventory, Net Net revenues Revenue from Contract with Customer, Excluding Assessed Tax Upon Grant Share-based Payment Arrangement, Tranche Three [Member] Concentration risk Concentration Risk, Percentage Geographical [Domain] Geographical [Domain] Investment agreement, additional amount to acquire land Contractual Obligation, Investment Agreement, Optional Additional Amount to Acquire Land Contractual Obligation, Investment Agreement, Optional Additional Amount to Acquire Land Maximum additional borrowing capacity Line of Credit Facility, Maximum Additional Borrowing Capacity Line of Credit Facility, Maximum Additional Borrowing Capacity Statement [Line Items] Statement [Line Items] Debt term Debt Instrument, Term Statement [Table] Statement [Table] Statistical Measurement [Axis] Statistical Measurement [Axis] Credit Facility [Axis] Credit Facility [Axis] Preferred stock, issued (in shares) Preferred Stock, Shares Issued 2022 Capital Leases, Future Minimum Payments Due in Three Years Restructuring and Related Activities [Abstract] Restructuring and Related Activities [Abstract] Entity Small Business Entity Small Business Principles of Consolidation Consolidation, Policy [Policy Text Block] Purchase order commitment Unrecorded Unconditional Purchase Obligation Operating Leases Lessee, Operating Lease, Liability, Payment, Due [Abstract] Increase (Decrease) in Stockholders' Equity Increase (Decrease) in Stockholders' Equity [Roll Forward] Debt Debt Disclosure [Text Block] Vested and exercisable Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term Proceeds from issuance of common stock pursuant to the secondary public offering, net of issuance costs Proceeds from Issuance of Common Stock Fiscal quarter ending September 30, 2020 Debt Instrument, Redemption, Period One [Member] Selling, general and administrative expenses Selling, General and Administrative Expenses [Member] Operating Leases Operating Leases [Abstract] Operating Leases Amendment Flag Amendment Flag Schedule of basic and diluted net income (loss) per common share Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] 2021 Capital Leases, Future Minimum Payments Due in Two Years Total minimum lease payments Operating Leases, Future Minimum Payments Due Decrease in prepaid rent Prepaid Rent Accrued interest or penalties related to uncertain tax positions Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued Beginning balance Ending balance Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability Value Shares authorized for issuance Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized Leases Lessee, Finance Leases [Text Block] Non-employee Share-based Payment Arrangement, Nonemployee [Member] Shares available for grant (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant Fair Value of Financial Instruments Fair Value Measurement, Policy [Policy Text Block] Net cash used in operating activities Net Cash Provided by (Used in) Operating Activities Issuance of common stock upon conversion of convertible preferred stock (in shares) Reclassifications of Temporary to Permanent Equity, Shares Reclassifications of Temporary to Permanent Equity, Shares Entity Central Index Key Entity Central Index Key Restructuring Restructuring and Related Activities Disclosure [Text Block] Machinery and equipment Capital Addition Purchase Commitments [Member] Non-cash additions to property, plant and equipment Capital Expenditures Incurred but Not yet Paid Contract with Customer, Sales Channel [Domain] Contract with Customer, Sales Channel [Domain] Distributor One Distributor One [Member] Distributor One [Member] Geographical [Axis] Geographical [Axis] Subsequent Event Subsequent Events [Text Block] Shares issued for stock option exercises (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Shares Issued in Period Change in preferred and common stock warrant liabilities Fair Value Adjustment of Warrants Lease extended term Lessee, Operating Lease, Renewal Term Unrecognized compensation expense Share-based Payment Arrangement, Nonvested Award, Option, Cost Not yet Recognized, Amount Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Long-Lived Tangible Asset [Axis] Long-Lived Tangible Asset [Axis] Employee Stock Employee Stock [Member] Schedule of RSU activity Share-based Payment Arrangement, Restricted Stock and Restricted Stock Unit, Activity [Table Text Block] Operating lease liabilities Increase (Decrease) in Operating Lease, Liability Increase (Decrease) in Operating Lease, Liability Income Statement Location [Axis] Income Statement Location [Axis] Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Income Statement Location [Domain] Income Statement Location [Domain] Investment agreement, additional amount to acquire second land plot Contractual Obligation, Investment Agreement, Optional Additional Amount to Acquire Second Land Plot Contractual Obligation, Investment Agreement, Optional Additional Amount to Acquire Second Land Plot 2022 Lessee, Operating Lease, Liability, to be Paid, Year Two Cash flows from financing activities: Net Cash Provided by (Used in) Financing Activities [Abstract] Selling, general and administrative expenses Selling, General and Administrative Expense Finance Leases Finance Leases [Abstract] Finance Leases [Abstract] Investment agreement, land use right period Contractual Obligation, Investment Agreement, Land Use Right Period Contractual Obligation, Investment Agreement, Land Use Right Period Accrual for share-settled obligation Share-based Payment Arrangement, Unearned Cost Share-based Payment Arrangement, Unearned Cost Accrued bonus Accrued Bonuses, Current Components of lease and supplemental cash flow information Lease, Cost [Table Text Block] 2023 Lessee, Operating Lease, Liability, to be Paid, Year Three Other non-current assets, net Other Assets, Noncurrent Plan Name [Axis] Plan Name [Axis] Convertible preferred stock, authorized (in shares) Temporary Equity, Shares Authorized Issuance of common stock, net Stock Issued During Period, Value, New Issues Concentration Risk [Table] Concentration Risk [Table] Total assets Assets Thereafter Capital Leases, Future Minimum Payments Due Thereafter Fair value of warrants issued during the period Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Issuances Interest expense Interest Expense, Debt Shares issuable (in shares) Outstanding, beginning balance (in shares) Outstanding, ending balance (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number Title of 12(b) Security Title of 12(b) Security Payment of security deposits Payments for Security Deposits Payments for Security Deposits Former Co-manufacturer Complaint Former Co-Manufacturer Complaint [Member] Former Co-Manufacturer Complaint [Member] Finance Leases Finance Lease, Liability, Payment, Due [Abstract] Long-Lived Assets Long-Lived Assets [Member] Long-Lived Assets Subsequent Event Type [Axis] Subsequent Event Type [Axis] Distributor Two Distributor Two [Member] Distributor Two [Member] Cost of goods sold Cost of Sales [Member] Vesting [Domain] Vesting [Domain] Long-term capital lease obligations Capital Lease Obligations, Noncurrent Schedule of future maturities of finance lease liabilities Finance Lease, Liability, Fiscal Year Maturity [Table Text Block] Interest expense Interest Expense Depreciation and amortization Depreciation and amortization expense Depreciation, Depletion and Amortization Product and Service [Axis] Product and Service [Axis] Other non-current assets Other Noncurrent Assets [Member] Unrecognized compensation expense, period of recognition Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition 2025 Finance Lease, Liability, to be Paid, Year Five Damages sought, value Loss Contingency, Damages Sought, Value Expected volatility Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate Less imputed interest Lessee, Operating Lease, Liability, Undiscounted Excess Amount International net revenues Non-US [Member] 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 Net (loss) income available to common stockholders Net Income (Loss) Available to Common Stockholders, Basic Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Abstract] Non-cash lease expense Operating Lease, Expense Inventories Increase (Decrease) in Inventories Deferred offering costs Deferred Offering Costs Accounts payable Increase (Decrease) in Accounts Payable Number of Shares Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] Number of additional shares authorized per year Share-based Compensation Arrangement by Share-based Payment Award, Number of Additional Shares Authorized Per Year Share-based Compensation Arrangement by Share-based Payment Award, Number of Additional Shares Authorized per Year Current portion of finance lease liabilities Less: current portion of capital lease obligations Capital Lease Obligations, Current Retail Sales Channel, Directly to Consumer [Member] Term loan facility 2018 Term Loan Facility [Member] 2018 Term Loan Facility [Member] Debt Instrument [Axis] Debt Instrument [Axis] Additional Paid-in Capital Additional Paid-in Capital [Member] Purchase commitments, due 2022 Purchase Obligation, to be Paid, Year Two Disaggregation of Revenue [Line Items] Disaggregation of Revenue [Line Items] Accrued expenses and other current liabilities Increase (Decrease) in Accrued Liabilities Adjustments to reconcile net loss to net cash used in operating activities: Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Unconditional Purchase Obligation, Category of Goods or Services Acquired [Domain] Unconditional Purchase Obligation, Category of Goods or Services Acquired [Domain] Litigation Case [Axis] Litigation Case [Axis] Interest on lease liabilities Finance Lease, Interest Expense Shares of restricted stock purchased by nonemployees (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Unvested, Purchased Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Unvested, Purchased Common stock, outstanding (in shares) Common Stock, Shares, Outstanding Income Tax Disclosure [Abstract] Income Tax Disclosure [Abstract] Revolving credit facility Revolving Credit Facility [Member] (Loss) income before taxes Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Research and development expenses Research and Development Expense IPO IPO [Member] 2018 ESPP 2018 Employee Stock Purchase Plan [Member] 2018 Employee Stock Purchase Plan [Member] Subsequent event Subsequent Event [Member] Share-settled obligation liability Share-based Payment Arrangement, Liability, Current Share-based Payment Arrangement, Liability, Current Outstanding, beginning balance (in dollars per share) Outstanding, ending balance (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price Common stock, authorized (in shares) Common Stock, Shares Authorized Concentration Risk Type [Axis] Concentration Risk Type [Axis] Dilutive effect (in shares) Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements Total property, plant and equipment Property, Plant and Equipment, Gross Proceeds from exercise of stock options Proceeds from Stock Options Exercised Income Statement [Abstract] Income Statement [Abstract] Accumulated Other Comprehensive (Loss) Income AOCI Attributable to Parent [Member] Frozen Frozen [Member] Frozen [Member] Operating lease liabilities, net of current portion Operating Lease, Liability, Noncurrent Prepaid expenses and other assets Increase (Decrease) in Prepaid Expense and Other Assets Schedule of restricted stock activity Nonvested Restricted Stock Shares Activity [Table Text Block] Management’s Use of Estimates Use of Estimates, Policy [Policy Text Block] Current assets: Assets, Current [Abstract] JXEDZ Administrative Committee of Jiaxing Economic & Technological Development Zone [Member] Administrative Committee of Jiaxing Economic & Technological Development Zone Unrecorded Unconditional Purchase Obligation by Category of Item Purchased [Axis] Unrecorded Unconditional Purchase Obligation by Category of Item Purchased [Axis] Software Software and Software Development Costs [Member] Comprehensive (loss) income, net of tax Comprehensive Income (Loss), Net of Tax, Attributable to Parent 2023 Finance Lease, Liability, to be Paid, Year Three Revolving credit facility Long-term Line of Credit, Noncurrent Dividend yield Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate Total lease liabilities Lease, Liability Lease, Liability Preferred stock, par value (in dollars per share) Preferred Stock, Par or Stated Value Per Share Counterparty Name [Domain] Counterparty Name [Domain] Purchases of property, plant and equipment Payments to Acquire Property, Plant, and Equipment City Area Code City Area Code Document Period End Date Document Period End Date Property, Plant and Equipment [Abstract] Property, Plant and Equipment [Abstract] Number of renewal options Lessee, Operating Lease, Number of Renewal Options Lessee, Operating Lease, Number of Renewal Options Directors Director [Member] Schedule of disaggregation of revenue Disaggregation of Revenue [Table Text Block] 2020 Capital Leases, Future Minimum Payments Due, Next Twelve Months Lease, initial term Lessee, Operating Lease, Term of Contract Disaggregation of Revenue [Table] Disaggregation of Revenue [Table] Net (decrease) increase in cash and cash equivalents Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Excluding Exchange Rate Effect Schedule of major classes of inventory Schedule of Inventory, Current [Table Text Block] Long-term Debt, Type [Domain] Long-term Debt, Type [Domain] Share-based compensation expense Share-based Payment Arrangement, Noncash Expense Cash consideration to acquire assets Payments to Acquire Productive Assets Payments of minimum withholding taxes on net share settlement of equity awards Payment, Tax Withholding, Share-based Payment Arrangement Cover [Abstract] Cover [Abstract] Purchase commitment term Long-term Purchase Commitment, Period Alternate Base Rate Base Rate [Member] Useful life Property, Plant and Equipment, Useful Life Equipment loan, net Other Loans Payable, Long-term, Noncurrent Total debt outstanding Long-term Debt Contract with Customer, Sales Channel [Axis] Contract with Customer, Sales Channel [Axis] Thereafter Operating Leases, Future Minimum Payments, Due Thereafter Lessee, Lease, Description [Line Items] Lessee, Lease, Description [Line Items] Leases Lessee, Operating Leases [Text Block] 2020 Operating Leases, Future Minimum Payments Due, Next Twelve Months Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Axis] Cost of goods sold Cost of Goods and Services Sold Lease Cost Lease, Cost [Abstract] Equity Components [Axis] Equity Components [Axis] Restricted Stock Restricted Stock [Member] Finished goods Inventory, Finished Goods, Net of Reserves Share-based Payment Arrangement [Abstract] Share-based Payment Arrangement [Abstract] Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Minimum Minimum [Member] Balance Sheet Location [Domain] Balance Sheet Location [Domain] Land Land [Member] Property, plant, and equipment, net Property, plant and equipment, net Property, Plant, and Equipment and Finance Lease Right-of-Use Asset, after Accumulated Depreciation and Amortization Current portion of operating lease liabilities Operating Lease, Liability, Current Unrecognized share-based compensation expense Share-based Payment Arrangement, Nonvested Award, Excluding Option, Cost Not yet Recognized, Amount 2024 Capital Leases, Future Minimum Payments Due in Five Years Lease cost Operating Lease, Cost, Fixed Operating Lease, Cost, Fixed Cancelled/Forfeited (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value Schedule of fair value assumptions Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] Wages payable Accrued Salaries, Current Entity Interactive Data Current Entity Interactive Data Current Numerator: Numerator [Abstract] Numerator [Abstract] United States U.S. net revenues UNITED STATES Exercised (in dollars per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price Cash flows from operating activities: Net Cash Provided by (Used in) Operating Activities [Abstract] Stockholders’ Equity Stockholders' Equity Note Disclosure [Text Block] Purchase commitments Purchase Obligation Customer [Domain] Customer [Domain] Weighted Average Remaining Contractual Life (Years) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Additional Disclosures [Abstract] Quarterly vesting Share-based Payment Arrangement, Tranche Four [Member] Share-based Payment Arrangement, Tranche Four Brand Ambassador Brand Ambassador [Member] Brand Ambassador Entity Registrant Name Entity Registrant Name Unrealized translation gains, cumulative foreign translation adjustments, net of tax Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax Subsequent Event Type [Domain] Subsequent Event Type [Domain] Statement of Stockholders' Equity [Abstract] Statement of Stockholders' Equity [Abstract] Weighted average discount rate Operating Lease, Weighted Average Discount Rate, Percent Concentration Risk [Line Items] Concentration Risk [Line Items] Proceeds from sale of fixed assets Proceeds from Sale of Property, Plant, and Equipment Debt issuance costs Debt issuance costs Debt Issuance Costs, Net Shipping and Handling Shipping and Handling [Member] Weighted Average Exercise Price Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract] Liability for estimated sales discounts Customer Refund Liability, Current Less imputed interest Finance Lease, Liability, Undiscounted Excess Amount Class of Warrant or Right [Line Items] Class of Warrant or Right [Line Items] Vehicles Vehicles [Member] Interest rate Debt Instrument, Interest Rate, Effective Percentage Research and development expenses Research and Development Expense [Member] Purchase commitments, due remainder of 2020 Purchase Obligation, to be Paid, Remainder of Fiscal Year Issuance of common stock upon conversion of convertible preferred stock Conversion of convertible preferred stock to common stock upon initial public offering Stock Issued During Period, Value, Conversion of Convertible Securities Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Accounts receivable Accounts Receivable, after Allowance for Credit Loss, Current Total undiscounted future minimum lease payments Lessee, Operating Lease, Liability, to be Paid Accrued unpaid liabilities, contract termination Restructuring Reserve Accounting Standards Update [Axis] Accounting Standards Update [Axis] Loss on sale of fixed assets Gain (Loss) on Disposition of Property Plant Equipment, Excluding Oil and Gas Property and Timber Property Debt Instrument, Redemption, Period [Domain] Debt Instrument, Redemption, Period [Domain] Finance lease cost Finance Lease, Cost Finance Lease, Cost Schedule of assets and liabilities related to operating and finance leases Schedule of Assets and Liabilities Related to Operating and Finance Leases [Table Text Block] Schedule of Assets and Liabilities Related to Operating and Finance Leases [Table Text Block] Foreign Currency Foreign Currency Transactions and Translations Policy [Policy Text Block] ASU 2016-02 Accounting Standards Update 2016-02 [Member] Sale of Stock [Axis] Sale of Stock [Axis] Entity Address, Postal Zip Code Entity Address, Postal Zip Code Fiscal quarters thereafter Debt Instrument, Redemption, Period Two [Member] Total minimum lease payments Capital Leases, Future Minimum Payments Due Foreign currency translation gain, net of tax Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Portion Attributable to Parent Document Transition Report Document Transition Report Debt Instrument, Redemption, Period [Axis] Debt Instrument, Redemption, Period [Axis] Title of Individual [Axis] Title of Individual [Axis] Warrants outstanding (in shares) Class of Warrant or Right, Outstanding Class of Warrant or Right [Table] Class of Warrant or Right [Table] Other (expense) income, net: Nonoperating Income (Expense) [Abstract] Debt, face amount Debt Instrument, Face Amount Document Quarterly Report Document Quarterly Report Vesting [Axis] Vesting [Axis] Equity [Abstract] Equity [Abstract] Issuance of common stock under equity incentive plans, net (in shares) Stock Issued During Period, Shares, Employee Stock Ownership Plan Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Subsequent Event [Line Items] Subsequent Event [Line Items] Accounting standards update Accounting Standards Update [Extensible List] Reclassification of warrant liability to additional paid-in capital in connection with the IPO Fair Value, Measurement with Unobservable Inputs Reconciliation, Liability, Transfers out of Level 3 Granted (in dollars per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price Customer Concentration Risk Customer Concentration Risk [Member] Vested and expected to vest (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Number Credit Facility [Domain] Credit Facility [Domain] Weighted average common shares outstanding—diluted Weighted average common shares outstanding—diluted Weighted Average Number of Shares Outstanding, Diluted Litigation Case [Domain] Litigation Case [Domain] Net (loss) income per share available to common stockholders—basic (in dollars per share) Earnings Per Share, Basic Average expected term (years) Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term Entity File Number Entity File Number Cancelled/Forfeited (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period Debt Disclosure [Abstract] Debt Disclosure [Abstract] Weighted average remaining lease term (years) Operating Lease, Weighted Average Remaining Lease Term Proceeds from note receivable on assets previously held for sale Proceeds from Sale of Finance Receivables Early termination fee amount Line of Credit Facility, Early Termination Fee Amount Line of Credit Facility, Early Termination Fee Amount Minimum fixed charge coverage ratio Debt Instrument, Covenant, Fixed Charge Coverage Ratio, Minimum Debt Instrument, Covenant, Fixed Charge Coverage Ratio, Minimum Net cash provided by financing activities Net Cash Provided by (Used in) Financing Activities Reclassification of warrant liability to additional paid-in capital in connection with the initial public offering Adjustments to Additional Paid in Capital, Warrant Issued Purchases of property, plant and equipment held for sale Payments to Acquire Property, Plant, and Equipment, Held-for-sale Payments to Acquire Property, Plant, and Equipment, Held-for-sale Share-based compensation expense Share-based Payment Arrangement, Expense Balance Sheet Location [Axis] Balance Sheet Location [Axis] Counterparty Name [Axis] Counterparty Name [Axis] Common stock, par value $0.0001 per share—500,000,000 shares authorized; 62,625,629 and 61,576,494 shares issued and outstanding at September 26, 2020 and December 31, 2019, respectively Common Stock, Value, Issued Number of employees hired Productive Assets Acquisition, Number of Employees Hired Productive Assets Acquisition, Number of Employees Hired Document Fiscal Year Focus Document Fiscal Year Focus Decrease in deferred rent Deferred Rent Credit Capital Lease Obligations Capital Leases, Future Minimum Payments, Net Present Value [Abstract] Vested and exercisable Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value Short-term borrowings under revolving credit facility and bank term loan Less: current portion of long-term debt Long-term Debt, Current Maturities Entity Current Reporting Status Entity Current Reporting Status 2024 Finance Lease, Liability, to be Paid, Year Four Remeasurement of warrant liability Change in fair value of warrant liability Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings Principal payments under finance lease obligations Repayments of Long-term Capital Lease Obligations Subsequent Event [Table] Subsequent Event [Table] Schedule of Long-term Debt Instruments [Table] Schedule of Long-term Debt Instruments [Table] Granted (in dollars 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 Inventory Disclosure [Abstract] Inventory Disclosure [Abstract] Vesting percentage Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage Cash flows from investing activities: Net Cash Provided by (Used in) Investing Activities [Abstract] Common stock, issued (in shares) Common Stock, Shares, Issued Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Less: imputed interest (4.1% to 15.9%) Capital Leases, Future Minimum Payments, Interest Included in Payments Total discounted future minimum lease payments Operating Lease, Liability Litigation Status [Axis] Litigation Status [Axis] Long-term debt Long-term Debt, Excluding Current Maturities Research and development equipment Research And Development Equipment [Member] Research And Development Equipment [Member] Summary of Significant Accounting Policies Basis of Presentation and Significant Accounting Policies [Text Block] Accounts receivable Increase (Decrease) in Accounts Receivable Debt Instrument [Line Items] Debt Instrument [Line Items] Beginning balance Ending balance Temporary Equity, Carrying Amount, Attributable to Parent Statement of Comprehensive Income [Abstract] Total stockholders’ equity Beginning balance Ending balance Stockholders' Equity Attributable to Parent Denominator: Denominator [Abstract] Denominator [Abstract] Introduction Nature of Operations [Text Block] Concentration Risk Type [Domain] Concentration Risk Type [Domain] Total liabilities and stockholders’ equity Liabilities and Equity Loss Contingencies [Line Items] Loss Contingencies [Line Items] Repayment of equipment loan Repayments of Other Long-term Debt Accumulated other comprehensive income Accumulated Other Comprehensive Income (Loss), Net of Tax Income Taxes Income Tax Disclosure [Text Block] Total long-term liabilities Liabilities, Noncurrent Entity Address, City or Town Entity Address, City or Town RSU Restricted Stock Units (RSUs) [Member] Operating lease cost Operating Lease, Cost 2025 Lessee, Operating Lease, Liability, to be Paid, Year Five Note receivable Financing Receivable, after Allowance for Credit Loss Accounting Standards Update [Domain] Accounting Standards Update [Domain] Antidilutive securities excluded from computation Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount 2023 Operating Leases, Future Minimum Payments, Due in Four Years Weighted average remaining lease term (years) Finance Lease, Weighted Average Remaining Lease Term Entity Ex Transition Period Entity Ex Transition Period Short-term lease cost Short-term Lease, Cost Equity Component [Domain] Equity Component [Domain] Grantee Status [Domain] Grantee Status [Domain] Liabilities Liabilities [Abstract] Executive Officer Executive Officer [Member] Gross profit Gross Profit Property, plant, and equipment, net Property, plant and equipment, net Property, Plant and Equipment, Net Issuance of common stock upon exercise of common stock warrants Stock Issued During Period, Value, Exercise of Warrants Stock Issued During Period, Value, Exercise of Warrants Entity Tax Identification Number Entity Tax Identification Number Revenue Recognition Revenue from Contract with Customer [Policy Text Block] Lessee, Lease, Description [Table] Lessee, Lease, Description [Table] Share-Based Compensation Share-based Payment Arrangement [Text Block] Net (loss) income Net (loss) income Net loss Net Income (Loss) Attributable to Parent Finance lease liabilities Finance Lease, Liability, Noncurrent Net change in operating assets and liabilities: Increase (Decrease) in Operating Capital [Abstract] Remainder of 2020 Lessee, Operating Lease, Liability, to be Paid, Remainder of Fiscal Year LIBOR London Interbank Offered Rate (LIBOR) [Member] Inventories Inventory Disclosure [Text Block] Schedule of future maturities of capital lease liabilities (Topic 840) Schedule of Future Minimum Lease Payments for Capital Leases [Table Text Block] Leases [Abstract] Leases [Abstract] Long-term Debt, Type [Axis] Long-term Debt, Type [Axis] Total current assets Assets, Current Current Fiscal Year End Date Current Fiscal Year End Date Earnings Per Share [Abstract] Earnings Per Share [Abstract] Restructuring expenses Restructuring expenses Restructuring Charges Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Total discounted future minimum lease payments Finance Lease, Liability Total property, plant and equipment Property, Plant, and Equipment and Finance Lease Right-of-Use Asset, before Accumulated Depreciation and Amortization Stockholders’ equity: Stockholders' Equity Attributable to Parent [Abstract] Number of Stock Options Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] Document Fiscal Period Focus Document Fiscal Period Focus Accumulated depreciation and amortization Property, Plant, and Equipment and Finance Lease Right-of-Use Asset, Accumulated Depreciation and Amortization Thereafter Finance Lease, Liability, to be Paid, after Year Five Supplemental disclosures of cash flow information: Supplemental Cash Flow Information [Abstract] Vested and expected to vest Share-Based Compensation Arrangement By Share-Based Payment Award, Options, Vested And Expected To Vest, Intrinsic Value Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Intrinsic Value Entity Filer Category Entity Filer Category Common Stock Common Stock [Member] Product and Service [Domain] Product and Service [Domain] Property, Plant and Equipment [Line Items] Property, Plant and Equipment [Line Items] Long-Lived Tangible Asset [Domain] Long-Lived Tangible Asset [Domain] Concentration Risk Benchmark [Domain] Concentration Risk Benchmark [Domain] Non-cash additions to property, plant and equipment held for sale Noncash Additions to Property, Plant and Equipment Held-for-sale Noncash Additions to Property, Plant and Equipment Held-for-sale Weighted average discount rate Finance Lease, Weighted Average Discount Rate, Percent Geographic Concentration Risk Geographic Concentration Risk [Member] Schedule of property, plant, and equipment Property, Plant and Equipment [Table Text Block] Offering costs, accrued not yet paid Debt Issuance Costs Incurred During Noncash or Partial Noncash Transaction Operating Lease Obligations Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract] Remaining borrowing capacity Line of Credit Facility, Remaining Borrowing Capacity Issuance of common stock, net (in shares) Stock Issued During Period, Shares, New Issues Assets not yet placed in service Asset under Construction [Member] Leasehold improvements Leasehold Improvements [Member] Issuance of common stock upon conversion of convertible preferred stock Reclassifications of Temporary to Permanent Equity Revenue Revenue Benchmark [Member] Issuance of common stock upon conversion of convertible preferred stock (in shares) Stock Issued During Period, Shares, Conversion of Convertible Securities Variable lease cost Operating Lease, Cost, Variable Operating Lease, Cost, Variable Accumulated depreciation and amortization Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Note receivable from sale of assets held for sale Noncash or Part Noncash Divestiture, Amount of Consideration Received Non-cash investing and financing activities: Noncash Investing and Financing Items [Abstract] Issuance of common stock upon exercise of common stock warrants (in shares) Stock Issued During Period, Shares, Exercise of Warrants Stock Issued During Period, Shares, Exercise of Warrants Exercised (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period Total other (expense) income, net Nonoperating Income (Expense) Finance leases, net Finance Lease, Right-of-Use Asset, after Accumulated Amortization Schedule of future maturities of operating lease liabilities Lessee, Operating Lease, Liability, Maturity [Table Text Block] Stock Options Share-based Payment Arrangement, Option [Member] Basis of Presentation Basis of Accounting, Policy [Policy Text Block] Employee Share-based Payment Arrangement, Employee [Member] Weighted average common shares outstanding—basic Weighted Average Number of Shares Outstanding, Basic Variable annual interest rate Debt Instrument, Basis Spread on Variable Rate Equipment financing loan Equipment Loan Facility [Member] Equipment Loan Facility [Member] Risk-free interest rate Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate Subsequent Events [Abstract] Subsequent Events [Abstract] Cancelled/Forfeited (in dollars per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Forfeitures in Period, Weighted Average Exercise Price Grantee Status [Axis] Grantee Status [Axis] Total capital lease obligations Capital Lease Obligations Preferred Stock Increase (Decrease) in Temporary Equity [Roll Forward] Sale of Stock [Domain] Sale of Stock [Domain] Loss Contingencies [Table] Loss Contingencies [Table] Schedule of future maturities of operating lease liabilities (Topic 840) Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block] Plan Name [Domain] Plan Name [Domain] Interest Interest Paid, Excluding Capitalized Interest, Operating Activities Area leased (in square feet) Lessee, Operating Lease, Area Lessee, Operating Lease, Area SVB Credit Facilities SVB Credit Facilities [Member] SVB Credit Facilities [Member] Operating lease right-of-use assets obtained in exchange for lease liabilities Right-of-Use Asset Obtained in Exchange for Operating Lease Liability Remainder of 2020 Finance Lease, Liability, to be Paid, Remainder of Fiscal Year Proceeds from issuance of common stock pursuant to the initial public offering, net of issuance costs Proceeds from Issuance Initial Public Offering Additional paid-in capital Additional Paid in Capital 2022 Operating Leases, Future Minimum Payments, Due in Three Years Foreign currency transaction (loss) gain Foreign Currency Transaction Gain (Loss), before Tax Income tax expense Income Tax Expense (Benefit) 2024 Operating Leases, Future Minimum Payments, Due in Five Years Taxes Income Taxes Paid, Net Investment agreement, expected amount Contractual Obligation, Investment Agreement, Expected Amount Contractual Obligation, Investment Agreement, Expected Amount Cash and cash equivalents at the beginning of the period Cash and cash equivalents at the end of the period Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents Property, Plant and Equipment Property, Plant and Equipment, Policy [Policy Text Block] Effect of exchange rate changes on cash Effect of Exchange Rate on Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Including Disposal Group and Discontinued Operations Number of defendants Loss Contingency, Number of Defendants New Accounting Pronouncements or Change in Accounting Principle [Table] Accounting Standards Update and Change in Accounting Principle [Table] Title of Individual [Domain] Title of Individual [Domain] Accrued expenses and other current liabilities Accrued Liabilities, Current Net (loss) income per share available to common stockholders—diluted (in dollars per share) Earnings Per Share, Diluted 2021 Operating Leases, Future Minimum Payments, Due in Two Years Current portion of finance lease liabilities Finance Lease, Liability, Current Local Phone Number Local Phone Number Beginning balance (in shares) Ending balance (in shares) Convertible preferred stock, outstanding (in shares) Temporary Equity, Shares Outstanding First Anniversary Share-based Payment Arrangement, Tranche One [Member] Exercised Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value Schedule of changes in fair value Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] Debt, outstanding balance Long-term Debt, Gross New Employees New Employees [Member] New Employees Schedule of debt balances Schedule of Long-term Debt Instruments [Table Text Block] Entity Address, Address Line One Entity Address, Address Line One Issuance of common stock under equity incentive plans, net Stock Issued During Period, Value, Employee Stock Ownership Plan Entity Emerging Growth Company Entity Emerging Growth Company Award Type [Axis] Award Type [Axis] Weighted Average Grant Date Fair Value Per Share Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract] Prepaid expenses and other current assets Prepaid Expenses and Other Current Assets [Member] Repayment of term loan Repayments of Secured Debt Maximum Maximum [Member] Amortization of debt issuance costs Amortization of Debt Issuance Costs Preferred stock, authorized (in shares) Preferred Stock, Shares Authorized Purchase commitments, due 2021 Purchase Obligation, to be Paid, Year One Accumulated Deficit Retained Earnings [Member] Preferred stock, outstanding (in shares) Preferred Stock, Shares Outstanding Net cash used in investing activities Net Cash Provided by (Used in) Investing Activities Weighted Average Remaining Contractual Life (Years) Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract] Lease discount rate Lessee, Finance Lease, Discount Rate Pending Litigation Pending Litigation [Member] Outstanding Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term 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 [Domain] Award Type [Domain] Long-term liabilities: Long-term: Liabilities, Noncurrent [Abstract] Trading Symbol Trading Symbol Vested and exercisable (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price Property, Plant and Equipment Property, Plant and Equipment Disclosure [Text Block] Litigation Status [Domain] Litigation Status [Domain] Weighted Average Remaining Contractual Life (Years) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Outstanding, Weighted Average Remaining Contractual Terms Unused commitment fee Line of Credit Facility, Unused Capacity, Commitment Fee Percentage Net (Loss) Income Per Share Available to Common Stockholders Earnings Per Share [Text Block] Organization, Consolidation and Presentation of Financial Statements [Abstract] Organization, Consolidation and Presentation of Financial Statements [Abstract] Maximum leverage ratio Debt Instrument, Covenant, Leverage Ratio, Maximum Debt Instrument, Covenant, Leverage Ratio, Maximum Manufacturing equipment Equipment [Member] Current liabilities: Current: Liabilities, Current [Abstract] Entity Shell Company Entity Shell Company Common stock withheld to cover taxes (in shares) Share-based Payment Arrangement, Shares Withheld for Tax Withholding Obligation Vested and expected to vest (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Exercise Price 2022 Finance Lease, Liability, to be Paid, Year Two Recently Adopted and New Accounting Pronouncements New Accounting Pronouncements, Policy [Policy Text Block] Proceeds from revolving credit facility Proceeds from Lines of Credit Statement of Financial Position [Abstract] Statement of Financial Position [Abstract]