Commitments and Major Customer Purchase committments (Details) (USD $)		0 Months Ended	9 Months Ended	3 Months Ended	9 Months Ended	3 Months Ended	9 Months Ended
	Jun. 30, 2013 Financial Standby Letter of Credit [Member]	Apr. 17, 2013 Pipelines [Member]	Jun. 30, 2013 Coal Contract [Member]	Jun. 30, 2013 Denaturant [Member] gal	Jun. 30, 2013 Denaturant [Member]	Jun. 30, 2013 Forward Contracts [Member] bu	Jun. 30, 2013 Forward Contracts [Member] bu
Long-term Purchase Commitment [Line Items]
Long-term purchase commitment, amount			$ 2,190,720		$ 269,766		$ 1,319,389
Long-term purchase commitment, minimum quantity required				126,000		205,587
Corn forward contract						510,000	510,000
Estimated additions to property, plant and equipment		3,600,000
Property, plant and equipment, additions, term of contract		10 years
Guarantor obligations, current carrying value	$ 3,200,000