Revenues (Summary of Disaggregation of Company's Natural Gas, Oil and NGL Revenues) (Details) - USD ($)	3 Months Ended		9 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Disaggregation Of Revenue [Line Items]
Natural gas, oil and NGL sales	$ 10,899,820	$ 3,517,561	$ 25,670,624	$ 18,329,017
Royalty Interest [Member]
Disaggregation Of Revenue [Line Items]
Natural gas, oil and NGL sales	5,412,842	1,641,072	12,424,644	8,352,743
Working Interest [Member]
Disaggregation Of Revenue [Line Items]
Natural gas, oil and NGL sales	5,486,978	1,876,489	13,245,980	9,976,274
Oil [Member]
Disaggregation Of Revenue [Line Items]
Natural gas, oil and NGL sales	3,538,962	1,430,017	9,024,949	9,085,820
Oil [Member] | Royalty Interest [Member]
Disaggregation Of Revenue [Line Items]
Natural gas, oil and NGL sales	1,934,966	719,012	4,748,987	4,680,871
Oil [Member] | Working Interest [Member]
Disaggregation Of Revenue [Line Items]
Natural gas, oil and NGL sales	1,603,996	711,005	4,275,962	4,404,949
NGL [Member]
Disaggregation Of Revenue [Line Items]
Natural gas, oil and NGL sales	1,102,261	232,856	2,555,180	1,372,480
NGL [Member] | Royalty Interest [Member]
Disaggregation Of Revenue [Line Items]
Natural gas, oil and NGL sales	453,935	129,833	1,095,124	548,921
NGL [Member] | Working Interest [Member]
Disaggregation Of Revenue [Line Items]
Natural gas, oil and NGL sales	648,326	103,023	1,460,056	823,559
Natural Gas [Member]
Disaggregation Of Revenue [Line Items]
Natural gas, oil and NGL sales	6,258,597	1,854,688	14,090,495	7,870,717
Natural Gas [Member] | Royalty Interest [Member]
Disaggregation Of Revenue [Line Items]
Natural gas, oil and NGL sales	3,023,941	792,227	6,580,533	3,122,951
Natural Gas [Member] | Working Interest [Member]
Disaggregation Of Revenue [Line Items]
Natural gas, oil and NGL sales	$ 3,234,656	$ 1,062,461	$ 7,509,962	$ 4,747,766