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11. Agreements (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
11. Agreements (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Agreements Details
Ethanol sales	$ 23,906	$ 33,641	$ 70,765	$ 121,388
Wet distiller's grains sales	5,609	8,175	19,568	30,970
Corn oil sales	835	1,018	2,771	3,263
Corn purchases	24,056	27,616	74,949	94,563
Milo purchases	0	0	0	0
Accounts receivable	312	0	312	0
Accounts payable	$ 1,539	$ 1,904	$ 1,539	$ 1,904