Note 4 - Accounts Receivable and Revenues - Revenues by Product Line (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Revenues	$ 22,649	$ 26,647
Long Grain Rice and Bran [Member]
Revenues	15,723	16,957
Barley and Oats [Member]
Revenues	6,296	8,306
Feed and Other [Member]
Revenues	$ 630	$ 1,384