Revenues (Summary of Disaggregation of Company's Natural Gas, Oil and NGL Revenues) (Details) - USD ($)	3 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Disaggregation Of Revenue [Line Items]
Natural gas, oil and NGL sales	$ 6,424,979	$ 7,593,838
Royalty Interest [Member]
Disaggregation Of Revenue [Line Items]
Natural gas, oil and NGL sales	2,517,455	2,909,101
Working Interest [Member]
Disaggregation Of Revenue [Line Items]
Natural gas, oil and NGL sales	3,907,524	4,684,737
Oil [Member]
Disaggregation Of Revenue [Line Items]
Natural gas, oil and NGL sales	2,341,066	3,465,512
Oil [Member] | Royalty Interest [Member]
Disaggregation Of Revenue [Line Items]
Natural gas, oil and NGL sales	1,096,952	1,413,211
Oil [Member] | Working Interest [Member]
Disaggregation Of Revenue [Line Items]
Natural gas, oil and NGL sales	1,244,114	2,052,301
NGL [Member]
Disaggregation Of Revenue [Line Items]
Natural gas, oil and NGL sales	625,112	614,883
NGL [Member] | Royalty Interest [Member]
Disaggregation Of Revenue [Line Items]
Natural gas, oil and NGL sales	230,338	222,777
NGL [Member] | Working Interest [Member]
Disaggregation Of Revenue [Line Items]
Natural gas, oil and NGL sales	394,774	392,106
Natural Gas [Member]
Disaggregation Of Revenue [Line Items]
Natural gas, oil and NGL sales	3,458,801	3,513,443
Natural Gas [Member] | Royalty Interest [Member]
Disaggregation Of Revenue [Line Items]
Natural gas, oil and NGL sales	1,190,165	1,273,113
Natural Gas [Member] | Working Interest [Member]
Disaggregation Of Revenue [Line Items]
Natural gas, oil and NGL sales	$ 2,268,636	$ 2,240,330