Supplementary Information On Natural Gas, Oil And NGL Reserves (Summary of Capitalized Costs of Natural Gas and Oil Properties and Related Depreciation, Depletion and Amortization) (Details) - USD ($)	Sep. 30, 2020	Sep. 30, 2019
Extractive Industries [Abstract]
Producing properties	$ 324,886,491	$ 354,718,398
Non-producing minerals	18,808,689	14,413,899
Non-producing leasehold	185,125	185,124
Gross capitalized costs	343,880,305	369,317,421
Accumulated depreciation, depletion and amortization	(263,277,422)	(258,063,849)
Net capitalized costs	$ 80,602,883	$ 111,253,572