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

3 Months Ended

Mar. 31, 2023

Notes Tables

Disaggregation of Revenue [Table Text Block]

		For the three months ended March 31,
		2023				2022
Ethanol sales		$	368			$	37,896
Wet distiller's grains sales			-				11,517
Other sales			107				2,628
		$	475			$	52,041

		For the three months ended March 31,
		2023				2022
Biodiesel sales		$	1,190			$	-
Other sales			280				8
		$	1,470			$	8

Schedule of Cash and Cash Equivalents [Table Text Block]

		As of
		March 31, 2023		December 31, 2022
Cash and cash equivalents		$ 4,131		$ 4,313
Restricted cash included in other current assets		127		725
Restricted cash included in other assets		1,961		1,961
Total cash, cash equivalents, and restricted cash shown in the statement of cash flows		$ 6,219		$ 6,999

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

		As of
		March 31, 2023				March 31, 2022
Series B preferred (post split basis)			127				127
Common stock options and warrants			6,125				4,774
Debt with conversion feature at $30 per share of common stock			1,246				1,223
Total number of potentially dilutive shares excluded from the diluted net (loss) per share calculation			7,498				6,124

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