Fair Value Measurements (Summary Of Impairments Associated With Certain Assets Measured At Fair Value On A Nonrecurring Basis Within Level 3) (Details) - USD ($)		3 Months Ended	9 Months Ended
		Jun. 30, 2021	Jun. 30, 2021	Jun. 30, 2020
Fair Value Disclosures [Abstract]
Producing Properties, Fair Value	[1]	$ 587	$ 587	$ 5,288,710
Producing Properties, Impairment	[1]	$ 37,879	$ 37,879	$ 29,315,807

[1] (a) When indicators of impairment are present, the Company assesses the carrying value of its natural gas and oil properties for impairment. This assessment utilizes estimates of future cash flows as well as other market data. 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 values in excess of their calculated fair values. This table excludes impairments on properties that were written off during the three and nine months ended June 30, 2021 in the amount of $7,976 and during the three and nine months ended June 30, 2020, in the amounts of $358,826 and $588,721, respectively.