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13. Acquisitions, Divestitures and Material Agreements (Details 1) (USD $)
 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Acquisitions Divestitures And Material Agreements Details 1    
Ethanol sales $ 128,830,630 $ 105,447,012
Distillers grains sales 35,468,559 20,558,034
Corn oil sales 2,582,858 0
Total Sales 166,882,047 126,005,046
Corn purchases 156,984,918 106,194,420
Accounts receivable $ 394,784 $ 841,729