Fair Value Measurements (Summary Of Impairments Associated With Certain Assets Measured At Fair Value On A Nonrecurring Basis Within Level 3) (Details) - USD ($)		12 Months Ended
		Sep. 30, 2020	Sep. 30, 2019
Fair Value Disclosures [Abstract]
Producing Properties, Fair Value	[1]	$ 5,288,710	$ 9,101,032
Producing Properties, Impairment	[1]	$ 29,315,807	$ 76,824,337

[1] ^{At the end of each quarter, the Company assessed the carrying value of its producing properties for impairment. This assessment utilized estimates of future cash flows or fair value (selling price) less cost to sell if the property is held for sale. Significant judgments and assumptions in these assessments include estimates of future natural gas, oil and NGL prices using a forward NYMEX curve adjusted for projected inflation, locational basis differentials, drilling plans, expected capital costs and an applicable discount rate commensurate with risk of the underlying cash flow estimates. These assessments identified certain properties with carrying value in excess of their calculated fair values. This table excludes $588,721 of impairments on properties that were written off during 2020.}