Risk Management (Details) (USD $)	3 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Sep. 30, 2012
Trading Activity, Gains and Losses, Net [Line Items]
Derivative assets	$ 0		$ 134,050
Derivative liabilities	(22,900)		0
Cash held by (due to) broker	220,379		(62,072)
Total	197,479		71,978
Trading Activity, Gains and Losses, Net	877,835	(328,587)
Cost of Goods, Total [Member]
Trading Activity, Gains and Losses, Net [Line Items]
Trading Activity, Gains and Losses, Net	877,835	(328,587)
Gain (Loss) on Settlement of Derivative Instrument [Member] | Cost of Goods, Total [Member]
Trading Activity, Gains and Losses, Net [Line Items]
Trading Activity, Gains and Losses, Net	900,735	79,563
Unrealized Gain (Loss or Write-down) [Member] | Cost of Goods, Total [Member]
Trading Activity, Gains and Losses, Net [Line Items]
Trading Activity, Gains and Losses, Net	$ (22,900)	$ (408,150)