Note 12 - Subsequent Events	3 Months Ended
Mar. 31, 2023
Notes to Financial Statements
Subsequent Events [Text Block]	*12.* Subsequent Events On May 4, 2023, Third Eye Capital agreed to the Limited Waiver and Amendment No. 26 to the Note Purchase Agreement (“Amendment No. 26”) to: provide a waiver for (i) the Keyes Plant Minimum Quarterly Production violation for the quarter ended June 30, 2023, in which the Borrowers will not meet the minimum production of 10 million gallons requirement and (ii) the lender agrees to waive the cash payment of certain fees which are required by the Third Eye Capital Notes and allowed these fees to be added to the outstanding balance of the Revolving Notes. As consideration for such waivers, the borrowers also agreed to pay Third Eye Capital an amendment and waiver fee of $0.1 million.

The entire disclosure for significant events or transactions that occurred after the balance sheet date through the date the financial statements were issued or the date the financial statements were available to be issued. Examples include: the sale of a capital stock issue, purchase of a business, settlement of litigation, catastrophic loss, significant foreign exchange rate changes, loans to insiders or affiliates, and transactions not in the ordinary course of business.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 855
-Name Accounting Standards Codification
-Publisher FASB
-URI https://asc.fasb.org//855/tableOfContent

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 855
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147483399/855-10-50-2

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