Supplementary Information on Oil, Ngl and Natural Gas Reserves (Unaudited) (Details 6) (USD $)	12 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2010
Changes in the standardized measure of discounted future net cash flow
Beginning Balance	$ 78,382,434	$ 72,500,409	$ 53,746,508
Changes resulting from:
Sales of oil and natural gas, net of production costs	(30,226,927)	(33,570,621)	(34,429,083)
Net change in sales prices and production costs	(45,178,377)	(2,697,833)	30,806,970
Net change in future development costs	4,618,147	4,177,910	(26,093,254)
Net change in asset retirement obligation	(134,604)	(51,098)	(48,185)
Extensions and discoveries	34,216,533	11,938,029	53,274,047
Revisions of quantity estimates	(27,419,576)	7,046,873	28,946,810
Acquisitions (divestitures) of reserves-in-place	20,160,327	4,480,858	(15,706)
Accretion of discount	13,644,203	12,523,091	8,066,959
Net change in income taxes	10,735,694	(5,329,092)	(25,807,417)
Change in timing and other, net	8,616,434	7,363,908	(15,947,240)
Net change	(10,968,146)	5,882,025	18,753,901
Ending Balance	$ 67,414,288	$ 78,382,434	$ 72,500,409