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Less: current portion Long-Term Debt, Current Maturities Exercised (in dollars per share) Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price Net cash used in financing activities Net Cash Provided by (Used in) Financing Activities Accrued payroll and related benefits Employee-related Liabilities, Current Stockholders' Equity Stockholders' Equity Attributable to Parent [Abstract] Prepaid expenses and other current assets Total prepaid expenses and other current assets Prepaid Expense and Other Assets, Current Segments [Domain] Segments [Domain] Number of long-term fuel supply contracts Number Of Long-Term Fuel Supply Contracts Number Of Long-Term Fuel Supply Contracts Net Loss Per Share Earnings Per Share [Text Block] Isobutanol Isobutanol [Member] Represents the finished good, Isobutanol. 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Reporting Information [Line Items] Segment Reporting Information [Line Items] Total unrecognized compensation expense, net of estimated forfeitures, relating to stock options Share-Based Payment Arrangement, Nonvested Award, Option, Cost Not yet Recognized, Amount Debt instrument, decrease, forgiveness Debt Instrument, Decrease, Forgiveness Common Stock Common Stock [Member] Other comprehensive income (loss) Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent Stock-based awards and related share issuances, net Shares Issued, Value, Share-Based Payment Arrangement, after Forfeiture Gross Unrealized Losses Debt Securities, Available-For-Sale, Current, Accumulated Gross Unrealized Loss, Before Tax Debt Securities, Available-For-Sale, Current, Accumulated Gross Unrealized Loss, Before Tax Lease, Cost Lease, Cost [Table Text Block] Number of shares available for awards (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares 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Electricity Above Use (Estimated) [Member] Electricity Above Use (Estimated) Total operating expenses Costs and Expenses Project production capacity (in gallon per year) Project Production Capacity, Volume Per Year Project Production Capacity, Volume Per Year Payables and Accruals [Abstract] Subsequent Event [Line Items] Subsequent Event [Line Items] Debt Instrument [Line Items] Debt Instrument [Line Items] Class of Warrant or Right [Table] Class of Warrant or Right [Table] Issuance of common stock under stock plans, net of taxes ( in shares) Shares Issued, Shares, Share-Based Payment Arrangement, after Forfeiture Total lease liabilities Operating Lease, Liability Segments Segment Reporting Disclosure [Text Block] Volatility Measurement Input, Price Volatility [Member] Amortization of marketable securities (discount) premium Accretion (Amortization) of Discounts and Premiums, Investments General and administrative Selling, General and Administrative Expenses [Member] Total Finance Lease, Liability, to be Paid Environmental attributes Environmental Attributes [Member] Environmental Attributes Finance Lease, Liability, Fiscal Year Maturity Finance Lease, Liability, Fiscal Year Maturity [Table Text Block] Investments, Debt and Equity Securities [Abstract] 2025 Finite-Lived Intangible Asset, Expected Amortization, Year Two Estimated Fair Value Estimate of Fair Value Measurement [Member] U.S. Treasury notes US Treasury Securities [Member] Granted (in dollars per share) Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Grants in Period, Weighted Average Exercise Price Joint development costs expected to remit Joint Development Costs Expected To Remit Joint Development Costs Expected To Remit Fair Value, Recurring and Nonrecurring [Table] Fair Value, Recurring and Nonrecurring [Table] Acquisition of patent portfolio Payments to Acquire Intangible Assets 2023 (remaining) Long-Term Debt, Maturity, Remainder of Fiscal Year Proceeds from issuance or sale of stock Sale of Stock, Consideration Received on Transaction Inventories Total inventories Inventory, Net Accounts payable Accounts Payable, Current Options vested and expected to vest Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested and Expected to Vest, Outstanding, Aggregate Intrinsic Value Environmental liabilities Accrual for Environmental Loss Contingencies Entity Filer Category Entity Filer Category Weighted-average number of common shares outstanding - basic (in shares) Basic weighted-average shares outstanding (in shares) Weighted Average Number of Shares Outstanding, Basic Debt collateral amount Debt Instrument, Collateral Amount Losses accrual for known contingent liability Loss Contingency Accrual Stock-based compensation Share-Based Payment Arrangement, Expense Sale of stock, authorized amount Sale Of Stock, Authorized Amount Sale Of Stock, Authorized Amount Security Exchange Name Security Exchange Name Beginning Balance (in dollars per share) Ending Balance (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted Average Exercise Price Schedule of Estimated Commitments Long-Term Purchase Commitment [Table Text Block] Class of Warrant or Right [Domain] Class of Warrant or Right [Domain] Weighted-Average Useful Life (Years) Acquired Finite-Lived Intangible Assets, Weighted Average Useful Life Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Schedule of Equity Incentive Plans [Table] Schedule of Equity Incentive Plans [Table] Schedule of Equity Incentive Plans Letters of credit outstanding Letters of Credit Outstanding, Amount Restricted Stock Restricted Stock [Member] Property, Plant and Equipment [Line Items] Property, Plant and Equipment [Line Items] Revenues Revenue from Contract with Customer, Excluding Assessed Tax Number of shares of common stock reserved for issuance (in shares) Common Stock, Capital Shares Reserved for Future Issuance Cover [Abstract] Schedule of Long-term Debt Instruments [Table] Schedule of Long-Term Debt Instruments [Table] Interest expense capitalized Interest Costs Capitalized Significant Unobservable Inputs (Level 3) Fair Value, Inputs, Level 3 [Member] Juhl Juhl [Member] Juhl Depreciation and amortization Depreciation, Depletion and Amortization, Nonproduction Schedule of Stock-based Compensation Expense Share-Based Payment Arrangement, Cost by Plan [Table Text Block] Work in process Inventory, Work in Process, Net of Reserves Weighted-average discount rate - finance leases Finance Lease, Weighted Average Discount Rate, Percent Revenues from Contracts with Customers and Other Revenues Revenue from Contract with Customer [Text Block] Schedule of Prepaid Expenses and Other Current Assets Schedule of Other Current Assets [Table Text Block] Segment Reporting [Abstract] Forecast Forecast [Member] Contractual obligation Contractual Obligation Deposits receivable Deposits And Other Assets, Noncurrent, Deposits Receivable Deposits And Other Assets, Noncurrent, Deposits Receivable Total liabilities and stockholders' equity Liabilities and Equity Debt instrument, term Debt Instrument, Term Collaborative Arrangement and Arrangement Other than Collaborative [Axis] Collaborative Arrangement and Arrangement Other than Collaborative [Axis] Long-term Debt, Type [Axis] Long-Term Debt, Type [Axis] Land Land [Member] Finished Goods And Work In Process Inventory Finished Goods And Work In Process Inventory [Member] Finished Goods And Work In Process Inventory Organization, Consolidation and Presentation of Financial Statements [Abstract] Net settlement of common stock under stock plans Payments For Net Settlement Of Common Stock Under Stock Plans Payments For Net Settlement Of Common Stock Under Stock Plans Ethanol sales and related products, net Ethanol Sales and Related Products [Member] The amount of revenue derived from ethanol sales and related products. Significant Other Observable Inputs (Level 2) Fair Value, Inputs, Level 2 [Member] 2021 Bonds, net 2021 Bonds [Member] 2021 Bonds Current Fiscal Year End Date Current Fiscal Year End Date Accounts Payable and Accrued Liabilities Accounts Payable and Accrued Liabilities Disclosure [Text Block] Less: amounts representing present value discounts Lessee, Operating Lease, Liability, Undiscounted Excess Amount Finite-Lived Intangible Assets [Line Items] Finite-Lived Intangible Assets [Line Items] Net loss Net Income (Loss) Available to Common Stockholders, Diluted Restricted Cash and Cash Equivalents [Abstract] Net loss per share - diluted (in dollars per share) Earnings Per Share, Diluted Sale of Stock [Domain] Sale of Stock [Domain] Inventory [Line Items] Inventory [Line Items] Number of finance lease Lessee, Finance Lease, Number Of Contract Lessee, Finance Lease, Number Of Contract Proceeds from sale of property, plant and equipment Proceeds from Sale of Property, Plant, and Equipment Non-cash stock-based compensation APIC, Share-Based Payment Arrangement, Increase for Cost Recognition Consolidation Items [Axis] Consolidation Items [Axis] Total current liabilities Liabilities, Current Renewable natural gas commodity Renewable Natural Gas Commodity [Member] Renewable Natural Gas Commodity 2025 Lessee, Operating Lease, Liability, to be Paid, Year Two Inventory, Current [Table] Inventory, Current [Table] Marketable Securities [Table] Marketable Securities [Table] Line of credit annual fee percentage Line of Credit Facility, Commitment Fee Percentage Other income (expense) Nonoperating Income (Expense) [Abstract] Operating Lease, Liability, Fiscal Year Maturity Lessee, Operating Lease, Liability, Maturity [Table Text Block] Entity Address, Address Line Two Entity Address, Address Line Two Entity Address, Address Line One Entity Address, Address Line One Other Assets, Noncurrent [Abstract] Product and Service [Axis] Product and Service [Axis] Weighted-average remaining lease term, finance lease (months) Finance Lease, Weighted Average Remaining Lease Term Collaborative arrangement, advanced development fee payments committed Collaborative Arrangement, Advanced Development Fee Payments Committed Collaborative Arrangement, Advanced Development Fee Payments Committed Liabilities associated with indemnities Indemnification Liabilities Indemnification Liabilities Fair Value Disclosures [Abstract] Interest expense Interest Expense Credit Facility [Axis] Credit Facility [Axis] Unrealized gain (loss) on available-for-sale securities OCI, Debt Securities, Available-for-Sale, Unrealized Holding Gain (Loss), before Adjustment, after Tax Inventory, allowance Inventory Valuation Reserves Inventories Inventory Disclosure [Text Block] Cash and Cash Equivalents [Domain] Cash and Cash Equivalents [Domain] Schedule of 2021 Bonds and Loans Payable - Other Schedule of Long-Term Debt Instruments [Table Text Block] Equity [Abstract] Equity [Abstract] Machinery and equipment Machinery and Equipment [Member] Subsequent Event [Table] Subsequent Event [Table] Inventory Disclosure [Abstract] Entity Tax Identification Number Entity Tax Identification Number 2026 Purchase Obligation, to be Paid, Year Three Number of commitments with collateral Number Of Commitments With Collateral Number Of Commitments With Collateral Reclassifications Reclassification, Comparability Adjustment [Policy Text Block] 2023 (remaining) Purchase Obligation, to be Paid, Remainder of Fiscal Year Disaggregation of Revenue Disaggregation of Revenue [Table Text Block] Revenue from Contract with Customer [Abstract] 2023 (remaining) Finite-Lived Intangible Asset, Expected Amortization, Remainder of Fiscal Year Operating cash flows from finance leases Finance Lease, Interest Payment on Liability At The Market Offering At The Market Offering [Member] At The Market Offering Net increase (decrease) in cash and cash equivalents Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect Restricted Cash Cash and Cash Equivalents Disclosure [Text Block] Entity Central Index Key Entity Central Index Key Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract] Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract] Interest income Investment Income, Interest Non-cash purchase of property, plant and equipment Noncash or Part Noncash Acquisition, Fixed Assets Acquired Measurement Frequency [Axis] Measurement Frequency [Axis] Weighted-Average Grant-Date Fair Value Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract] Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets by Major Class [Axis] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-Based Compensation Arrangements by Share-Based Payment Award [Table] Gain Contingencies [Line Items] Gain Contingencies [Line Items] Granted, Aggregate Intrinsic Value Share-Based Compensation Arrangement By Share-based Payment Award, Options, Granted, Intrinsic Value Share-Based Compensation Arrangement By Share-based Payment Award, Options, Granted, Intrinsic Value Accrued sales and use tax Other Accrued Liabilities, Current Measurement Input Type [Axis] Measurement Input Type [Axis] Deposits and Other Assets Deposits And Other Assets [Table Text Block] Deposits And Other Assets Entity [Domain] Entity [Domain] Praj Commitment Praj Commitment [Member] Praj Commitment City Area Code City Area Code General and administrative expense General and Administrative Expense Assets Assets [Abstract] Long-term Debt, Type [Domain] Long-Term Debt, Type [Domain] Consumables Enzymes And Other Inputs [Member] Represents the raw materials, enzymes and other inputs. Purchase Obligation, Total Purchase Obligation Other Commitments [Line Items] Other Commitments [Line Items] Statement of Stockholders' Equity [Abstract] Sale of Stock [Axis] Sale of Stock [Axis] Prepaid other Other Prepaid Expense, Current Lake Preston, South Dakota Lake Preston, South Dakota [Member] Lake Preston, South Dakota Financing Activities Net Cash Provided by (Used in) Financing Activities [Abstract] Schedule of cash, cash equivalents and restricted cash Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Including Disposal Group and Discontinued Operations [Abstract] 2024 Long-Term Debt, Maturity, Year One Supplemental disclosures of cash and non-cash investing and financing transactions Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract] Stock-based compensation Share-Based Payment Arrangement, Noncash Expense June 2022 Offering June 2022 Offering [Member] June 2022 Offering Warrants outstanding (in shares) Shares Underlying Warrants Outstanding (in shares) Class of Warrant or Right, Outstanding Less: amounts representing present value discounts Finance Lease, Liability, Undiscounted Excess Amount Other liabilities (non-current) Other Liabilities, Noncurrent Acquisitions of property, plant and equipment Payments to Acquire Property, Plant, and Equipment Renewable Natural Gas Renewable Natural Gas Segment [Member] Renewable Natural Gas Segment Disaggregation of Revenue [Line Items] Disaggregation of Revenue [Line Items] 2024 Finite-Lived Intangible Asset, Expected Amortization, Year One Schedule of Net Loss Per Share Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Cost of production Cost of Sales [Member] Nature of Business, Financial Condition and Basis of Presentation Business Description and Basis of Presentation [Text Block]