Revenues (Summary Of Disaggregation Of Company's Oil, NGL And Natural Gas Revenues) (Details)	12 Months Ended
	Sep. 30, 2019 USD ($)
Disaggregation Of Revenue [Line Items]
Oil, NGL and natural gas sales	$ 39,410,036
Royalty Interest [Member]
Disaggregation Of Revenue [Line Items]
Oil, NGL and natural gas sales	13,991,625
Working Interest [Member]
Disaggregation Of Revenue [Line Items]
Oil, NGL and natural gas sales	25,418,411
Oil [Member]
Disaggregation Of Revenue [Line Items]
Oil, NGL and natural gas sales	18,129,987
Oil [Member] | Royalty Interest [Member]
Disaggregation Of Revenue [Line Items]
Oil, NGL and natural gas sales	7,057,906
Oil [Member] | Working Interest [Member]
Disaggregation Of Revenue [Line Items]
Oil, NGL and natural gas sales	11,072,081
NGL [Member]
Disaggregation Of Revenue [Line Items]
Oil, NGL and natural gas sales	3,697,953
NGL [Member] | Royalty Interest [Member]
Disaggregation Of Revenue [Line Items]
Oil, NGL and natural gas sales	1,148,033
NGL [Member] | Working Interest [Member]
Disaggregation Of Revenue [Line Items]
Oil, NGL and natural gas sales	2,549,920
Natural Gas [Member]
Disaggregation Of Revenue [Line Items]
Oil, NGL and natural gas sales	17,582,096
Natural Gas [Member] | Royalty Interest [Member]
Disaggregation Of Revenue [Line Items]
Oil, NGL and natural gas sales	5,785,686
Natural Gas [Member] | Working Interest [Member]
Disaggregation Of Revenue [Line Items]
Oil, NGL and natural gas sales	$ 11,796,410