Commitments and Major Customer (Details) (USD $)	3 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Ethanol [Member]
Revenue, Major Customer [Line Items]
Marketing expense	$ 138,262	$ 170,383
Entity-wide revenue, major customer, amount	34,012,975	33,713,458
Ethanol receivable	5,326,768
Distillers' Grains [Member]
Revenue, Major Customer [Line Items]
Marketing expense	187,396	138,288
Entity-wide revenue, major customer, amount	12,478,100	8,138,333
Distillers grains receivable	$ 1,564,428