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6. Agreements (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
6. Agreements (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Agreements Details
Ethanol sales	$ 24,687	$ 23,906	$ 68,993	$ 70,765
Wet distiller's grains sales	6,114	5,609	16,918	19,568
Corn oil sales	788	835	2,232	2,771
Corn/Milo purchases	23,098	24,056	67,766	74,949
Accounts receivable	345	312	345	312
Accounts payable	$ 1,241	$ 1,539	$ 1,241	$ 1,539