v3.26.3
Note 7 - Revenue and Accounts Receivable (Details Textual) - USD ($)
3 Months Ended 6 Months Ended 9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Jun. 30, 2026
Sep. 30, 2026
Sep. 30, 2025
Dec. 31, 2025
Jan. 01, 2025
Accounts Receivable, after Allowance for Credit Loss $ 4,400,000     $ 4,400,000   $ 500,000 $ 1,800,000
Accounts Receivable, Allowance for Credit Loss 72,400     72,400   $ 385,000  
Contract with Customer, Liability 0     0      
California Ethanol [Member]              
Revenues 53,804,000 $ 40,726,000   145,495,000 $ 115,762,000    
California Ethanol [Member] | Petroleum Tax Credits PTC [Member]              
Revenues $ 4,635,000 $ 0   $ 13,716,000 $ 0    
California Ethanol [Member] | Petroleum Tax Credits PTC [Member] | Revision of Prior Period, Adjustment [Member]              
Revenues     $ 11,000,000