Supplementary Information On Oil, NGL And Natural Gas Reserves (Summary of Changes in Standardized Measure of Discounted Future Net Cash Flows) (Details) - USD ($)	12 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2015
Extractive Industries [Abstract]
Beginning Balance	$ 29,770,119	$ 81,591,211	$ 204,782,504
Sales of oil, NGL and natural gas, net of production costs	(25,783,055)	(16,749,632)	(35,359,204)
Net change in sales prices and production costs	37,186,619	(86,198,778)	(211,336,729)
Net change in future development and asset retirement costs	(7,939,156)	21,636,258	9,569,985
Extensions and discoveries	38,582,908	11,640,704	34,327,400
Revisions of quantity estimates	15,282,587	(41,716,689)	(51,375,950)
Acquisitions (divestitures) of reserves-in-place	(962,667)
Accretion of discount	4,789,294	14,424,032	37,000,855
Net change in income taxes	(27,070,430)	44,533,277	102,592,290
Change in timing and other, net	16,976,356	609,736	(8,609,940)
Net change	51,062,456	(51,821,092)	(123,191,293)
Ending Balance	$ 80,832,575	$ 29,770,119	$ 81,591,211