Supplementary Information On Oil, NGL And Natural Gas Reserves (Summary of Standardized Measure of Discounted Future Net Cash Flows) (Details) - USD ($)	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2016
Extractive Industries [Abstract]
Future cash inflows	$ 366,697,321	$ 759,899,074	$ 637,509,599
Future production costs	(153,935,373)	(259,413,766)	(256,193,675)
Future development and asset retirement costs	(1,917,937)	(89,518,449)	(93,133,683)
Future income tax expense	(47,788,416)	(95,872,182)	(102,193,819)
Future net cash flows	163,055,595	315,094,677	185,988,422
10% annual discount	(77,494,066)	(158,768,823)	(105,155,847)
Standardized measure of discounted future net cash flows	$ 85,561,529	$ 156,325,854	$ 80,832,575	$ 29,770,119