Supplementary Information On Oil, NGL And Natural Gas Reserves (Summary of Capitalized Costs of Oil and Natural Gas Properties and Related Depreciation, Depletion and Amortization) (Details) - USD ($)	Sep. 30, 2019	Sep. 30, 2018
Extractive Industries [Abstract]
Producing properties	$ 354,718,398	$ 427,448,584
Non-producing minerals	14,413,899	12,378,395
Non-producing leasehold	185,124	185,124
Gross capitalized costs	369,317,421	440,012,103
Accumulated depreciation, depletion and amortization	(258,063,849)	(242,169,604)
Net capitalized costs	$ 111,253,572	$ 197,842,499