Properties And Equipment (Details)	3 Months Ended						9 Months Ended			12 Months Ended
	Jun. 30, 2020 USD ($)	Mar. 31, 2020 USD ($)	Dec. 31, 2019 USD ($) a	Jun. 30, 2019 USD ($) a	Mar. 31, 2019 USD ($) a Asset	Dec. 31, 2018 USD ($) a	Jun. 30, 2020 USD ($)		Jun. 30, 2019 USD ($) a	Sep. 30, 2019 USD ($)
Property Plant And Equipment [Line Items]
Proceeds from sales of assets							$ 3,457,500		$ 13,114,969
Gain on sale of oil and gas properties	$ 3,108			$ 4,017,787			$ 3,275,996		13,114,725
Number of assets sold | Asset					0
Computation of Oil, Natural Gas and NGL Reserves							12 months
Impairment				$ 0			$ 29,315,807	[1]	$ 0
Impairment written-off	358,826						588,721
Impairment	$ 358,826						$ 29,904,528
Percentage of discount rate for developed location		10.00%
Undeveloped location assigned value		$ 0
Fayetteville Shale [Member]
Property Plant And Equipment [Line Items]
Impairment		19,300,000
Eagle Ford [Member]
Property Plant And Equipment [Line Items]
Impairment		7,300,000								$ 76,600,000
Other Producing Assets [Member]
Property Plant And Equipment [Line Items]
Impairment		$ 2,700,000
Lea and Eddy Counties, New Mexico [Member]
Property Plant And Equipment [Line Items]
Mineral acreage sold | a			530			206
Proceeds from sales of assets			$ 3,400,000
Gain on sale of oil and gas properties			$ 3,300,000			$ 9,100,000
Proceeds from sales of assets						$ 9,100,000
Martin County, Texas [Member]
Property Plant And Equipment [Line Items]
Mineral acreage sold | a				166					166
Gain on sale of oil and gas properties				$ 4,000,000
Proceeds from sales of assets				$ 4,000,000
Kingfisher, Canadian [Member]
Property Plant And Equipment [Line Items]
Mineral acreage acquired | a			700
Purchase price of mineral acreage acquired			$ 9,300,000
Blaine County, Oklahoma [Member]
Property Plant And Equipment [Line Items]
Mineral acreage acquired | a			700	313	329	45
Purchase price of mineral acreage acquired			$ 9,300,000	$ 3,300,000	$ 1,400,000	$ 400,000

[1] When indicators of impairment are present, the Company assesses the carrying value of its producing properties for impairment. This assessment utilized estimates of future cash flows. Significant judgments and assumptions in these assessments include estimates of future oil, NGL and natural gas 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 value 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, 2020, in the amounts of $358,826 and $588,721, respectively.