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8. Agreements (Tables)
 3 Months Ended
Mar. 31, 2021
Agreements  
Schedule of working capital agreement activity
     As of and for the three months ended March 31,  
    2021     2020  
Ethanol sales   $ -     $ 24,383  
Wet distiller's grains sales     11,035       8,374  
Corn oil sales     1,042       928  
Corn purchases     37,993       29,214  
Accounts receivable     133       60  
Accounts payable     415       1,749