Revenues (Summary Of Disaggregation Of Company's Natural Gas, Oil and NGL Revenues) (Details)	12 Months Ended
	Sep. 30, 2020 USD ($)
Disaggregation Of Revenue [Line Items]
Natural gas, oil and NGL sales	$ 23,370,003
Royalty Interest [Member]
Disaggregation Of Revenue [Line Items]
Natural gas, oil and NGL sales	10,455,923
Working Interest [Member]
Disaggregation Of Revenue [Line Items]
Natural gas, oil and NGL sales	12,914,080
Oil [Member]
Disaggregation Of Revenue [Line Items]
Natural gas, oil and NGL sales	11,188,370
Oil [Member] | Royalty Interest [Member]
Disaggregation Of Revenue [Line Items]
Natural gas, oil and NGL sales	5,691,837
Oil [Member] | Working Interest [Member]
Disaggregation Of Revenue [Line Items]
Natural gas, oil and NGL sales	5,496,533
NGL [Member]
Disaggregation Of Revenue [Line Items]
Natural gas, oil and NGL sales	1,925,879
NGL [Member] | Royalty Interest [Member]
Disaggregation Of Revenue [Line Items]
Natural gas, oil and NGL sales	776,426
NGL [Member] | Working Interest [Member]
Disaggregation Of Revenue [Line Items]
Natural gas, oil and NGL sales	1,149,453
Natural Gas [Member]
Disaggregation Of Revenue [Line Items]
Natural gas, oil and NGL sales	10,255,754
Natural Gas [Member] | Royalty Interest [Member]
Disaggregation Of Revenue [Line Items]
Natural gas, oil and NGL sales	3,987,660
Natural Gas [Member] | Working Interest [Member]
Disaggregation Of Revenue [Line Items]
Natural gas, oil and NGL sales	$ 6,268,094