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11. Agreements (Tables)
 6 Months Ended
Jun. 30, 2014
Agreements Tables  
Schedule of working capital agreement activity
    Three months ended June 30,     Six months ended June 30,  
    2014     2013     2014     2013  
Ethanol sales   $ 40,799     $ 27,243     $ 87,747     $ 32,740  
Wet distiller's grains sales     11,708       6,322       21,423       8,006  
Corn oil sales     1,344       455       2,245       630  
Corn purchases     33,619       26,145       66,947       31,519  
Milo Purchases     -       4,648       -       4,648  
Accounts receivable     458       1,578       458       1,578  
Accounts payable     2,122       2,096       2,122       2,096