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Nature of Activities and Summary of Significant Accounting Policies (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Sales	$ 49,895,000	$ 40,923,000	$ 147,586,000	$ 128,227,000
North America
Sales	49,832,000	33,131,000	146,890,000	114,226,000
North America | Ethanol and high-grade alcohol sales
Sales	39,131,000	24,825,000	111,220,000	86,387,000
North America | Wet distiller's grains sales
Sales	8,919,000	7,143,000	30,584,000	22,983,000
North America | Other sales
Sales	1,782,000	1,163,000	5,086,000	4,856,000
India
Sales	63,000	7,792,000	696,000	14,001,000
India | Other sales
Sales	63,000	18,000	106,000	51,000
India | Biodiesel sales
Sales	0	7,325,000	465,000	12,267,000
India | Refined Glycerin sales
Sales	0	449,000	125,000	909,000
India | PFAD sales
Sales	$ 0	$ 0	$ 0	$ 774,000

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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