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Note 1 - Nature of Activities and Summary of Significant Accounting Policies - Schedule of America By Product Category (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Sales	$ 77,194	$ 28,111
California Ethanol [Member]
Sales	104,068	228,194
California Ethanol [Member] | Alternative Energy, Ethanol [Member]
Sales	78,403	165,876
California Ethanol [Member] | Wet Distillers Grains [Member]
Sales	21,963	50,930
California Ethanol [Member] | Product and Service, Other [Member]
Sales	3,702	11,388
California Dairy Renewable Natural Gas [Member] | Gas Molecules and RIN Credits [Member]
Sales	5,455	208
India Biodiesel [Member] | Renewable Energy, Biodiesel [Member]
Sales	74,503	27,041
India Biodiesel [Member] | Product and Service, Other [Member]
Sales	$ 2,691	$ 1,070

X

- Definition

Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

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