Commitments and Major Customer Purchase committments (Details) (USD $)	3 Months Ended
	Dec. 31, 2012
Coal Contract [Member]
Long-term Purchase Commitment [Line Items]
Long-term Purchase Commitment, Amount	$ 2,030,000
Denaturant [Member]
Long-term Purchase Commitment [Line Items]
Denaturant price per unit	0.1875
Long-term Purchase Commitment, Minimum Quantity Required	243,000
Long-term Purchase Commitment, Amount	$ 581,621