Commitments and Major Customer Purchase committments (Details) (USD $)	3 Months Ended		9 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Coal Contract [Member]
Long-term Purchase Commitment [Line Items]
Long-term Purchase Commitment, Amount			$ 5,930,400
Payments to Suppliers	1,512,147	1,672,384	5,258,170	5,041,505
Denaturant [Member]
Long-term Purchase Commitment [Line Items]
Long-term Purchase Commitment, Amount			$ 346,950
Long-term Purchase Commitment, Minimum Quantity Required	180,000
Denaturant price per unit	0.1875