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9. Agreements (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Agreements Details    
Ethanol sales $ 95,556 $ 92,729
Wet distiller's grains sales 22,016 24,556
Corn oil sales 2,995 3,485
Corn/Milo purchases 91,234 97,179
Accounts receivable 743 305
Accounts payable $ 1,821 $ 1,455