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, 2018	Sep. 30, 2017	Sep. 30, 2016
Extractive Industries [Abstract]
Beginning Balance	$ 80,832,575	$ 29,770,119	$ 81,591,211
Sales of oil, NGL and natural gas, net of production costs	(32,836,007)	(25,783,055)	(16,749,632)
Net change in sales prices and production costs	47,533,281	37,186,619	(86,198,778)
Net change in future development and asset retirement costs	1,580,942	(7,939,156)	21,636,258
Extensions and discoveries	34,667,557	38,582,908	11,640,704
Revisions of quantity estimates	(8,391,223)	15,282,587	(41,716,689)
Acquisitions (divestitures) of reserves-in-place	(307,472)	(962,667)
Accretion of discount	12,602,209	4,789,294	14,424,032
Net change in income taxes	(3,057,128)	(27,070,430)	44,533,277
Change in timing and other, net	23,701,120	16,976,356	609,736
Net change	75,493,279	51,062,456	(51,821,092)
Ending Balance	$ 156,325,854	$ 80,832,575	$ 29,770,119