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Note 1 - Nature of Activities and Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2022

Notes Tables

Disaggregation of Revenue [Table Text Block]

California Ethanol		For the twelve months ended December 31,
		2022				2021
Ethanol sales		$	165,876			$	162,428
Wet distiller's grains sales			50,930				41,476
Other sales			11,388				7,347
		$	228,194			$	211,251

India Biodiesel		For the twelve months ended December 31,
		2022		2021
Biodiesel sales		$ 27,041		$ 465
Other sales		1,070		231
		$ 28,111		$ 696

Schedule of Cash and Cash Equivalents [Table Text Block]

		As of
		December 31, 2022		December 31, 2021
Cash and cash equivalents		$ 4,313		$ 7,751
Restricted cash included in other current assets		725		-
Restricted cash included in other assets		1,961		-
Total cash, cash equivalents, and restricted cash shown in the statement of cash flows		$ 6,999		$ 7,751

Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block]

		As of
		December 31, 2022				December 31, 2021
Series B preferred (post split basis)			127				128
Common stock options and warrants			5,050				3,819
Debt with conversion feature at $30 per share of common stock			1,240				1,220
Total number of potentially dilutive shares excluded from the diluted net (loss) per share calculation			6,417				5,167

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