Revenues from Contracts with Customers and Other Revenues	3 Months Ended
	Mar. 31, 2022
Revenue from Contract with Customer [Abstract]
Revenues from Contracts with Customers and Other Revenues	Revenues from Contracts with Customers and Other RevenuesThe Company's limited revenues are derived from two development-scale plants: (i) the South Hampton Facility and (ii) the Luverne Facility. These revenues are from customer contracts for ethanol sales and related products and hydrocarbon revenues, which include SAF, isooctene, and isooctane. These are sold mostly on a free-on-board, shipping point basis (recognized at a point in time), are independent transactions, do not provide post-sale support or promises to deliver future goods, and are single performance obligations. Historically, grant revenues consisted of governmental and cooperative research grants, while other revenue includes consulting services and short-term leases for certain storage facilities at the Luverne Facility. For the quarters ended March 31, 2022 and 2021, there were no variable revenues and as of March 31, 2022 and December 31, 2021, there were no remaining unfulfilled or partially fulfilled performance obligations. The Company does not offer explicit or implicit price concessions, so it records the revenue and trade receivables at 100% of the transaction price. Since all amounts are provided and due in less than one year, the Company elects to not record a financing component.