Supplementary Information On Oil, Ngl And Natural Gas Reserves (Summary of Standardized Measure of Discounted Future Net Cash Flows) (Details) (USD $)	12 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011
Supplementary Information On Oil, Ngl And Natural Gas Reserves [Abstract]
Future cash inflows	$ 630,332,900	$ 408,694,869	$ 494,523,456
Future production costs	(216,584,982)	(135,516,703)	(146,168,829)
Future development costs	(50,572,218)	(35,290,260)	(45,269,686)
Future income tax expense	(131,397,192)	(83,543,516)	(107,111,317)
Future net cash flows	231,778,508	154,344,390	195,973,624
10% annual discount	(130,103,612)	(86,930,102)	(117,591,190)
Standardized measure of discounted future net cash flows	$ 101,674,896	$ 67,414,288	$ 78,382,434