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Nature of Activities and Summary of Significant Accounting Policies (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Sales	$ 54,884	$ 47,824	$ 97,691	$ 87,304
North America [Member]
Sales	54,730	45,223	97,058	81,095
North America [Member] | Ethanol and high-grade alcohol sales
Sales	42,169	36,240	72,089	61,562
North America [Member] | Wet distiller's grains sales
Sales	10,630	7,466	21,665	15,840
North America [Member] | Other sales
Sales	1,931	1,517	3,304	3,693
India [Member]
Sales	154	2,601	633	6,209
India [Member] | Other sales
Sales	38	20	43	33
India [Member] | Biodiesel sales
Sales	107	2,149	465	4,942
India [Member] | Refined Glycerin sales
Sales	9	370	125	460
India [Member] | PFAD sales
Sales	$ 0	$ 62	$ 0	$ 774

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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