Summary Of Significant Accounting Policies (Narrative) (Details)	3 Months Ended	9 Months Ended	12 Months Ended
	Dec. 31, 2017	Sep. 30, 2018 USD ($) $ / a	Sep. 30, 2019 USD ($) a Item $ / a		Sep. 30, 2018 USD ($) a Item $ / a	Sep. 30, 2017 USD ($)
Summary Of Significant Accounting Policies [Line Items]
Number of Oil, NGL and Natural Gas Production Units | Item			6,496
Oil, NGL and natural gas revenues were derived from the sale of oil			46.00%
Oil, NGL and natural gas revenues were derived from the sale of NGL			9.00%
Oil, NGL and natural gas revenues were derived from the sale of natural gas			45.00%
Bad debt expense			$ 0		$ 0	$ 0
Fair value of derivative contracts, asset			2,494,144
Fair value of derivative contracts, liability		$ 3,414,016			3,414,016
Net cash paid on derivatives settled					1,001,893
Net cash received on derivatives settled			196,985			305,410
Book value of Non-producing oil and natural gas		$ 8,025,015	$ 9,673,787		8,025,015
Percentage of perpetual ownership of mineral interests in Oklahoma, North Dakota, Texas, Arkansas and New Mexico			91.00%
Accumulated period perpetual rights			93 years
Non Producing Minerals Area | a			197,468
Number of tracts owned | Item			6,688
Amount of acres average tract contains | a			30
Tracts Average Cost Per Acre | $ / a			73
Amortized Period of Non-producing Minerals			33 years
Straight-line amortized period of Producing Minerals			20 years
Straight-line amortized period of insignificant fields			10 years
Impairment			$ 76,824,337	[1]	$ 0	662,990	[1]
Percentage of discount rate for developed location			10.00%
Percentage of discount rate for undeveloped location			0.00%
Fair value of discounted cash flows and market quoted amount			$ 9,100,000
Number of non-core wells sold | Item			112		324
Mineral and non-participating royalty acreage sold | a			890
Proceeds from sales of assets			$ 19,515,735		$ 1,085,137	723,700
Net gain (loss) on sale of assets			18,730,197		(660,597)	(94,889)
Decrease in net book value			786,000		1,700,000
Gain on asset sales			18,973,426
Amount of Capitalized Interest Included in the Company's Capital Expenditures			38,606		89,023	168,351
Interest Expense			$ 1,995,789		1,748,101	$ 1,275,138
U.S. federal corporate tax rate	35.00%	21.00%	21.00%
Remeasurement of deferred income tax benefit, amount					$ 12,464,000
Effective tax rate			(25.00%)		(672.00%)
One-time Severance [Member]
Summary Of Significant Accounting Policies [Line Items]
Increase in accrued compensation			$ 670,000
Oklahoma and North Dakota [Member]
Summary Of Significant Accounting Policies [Line Items]
Mineral acreage acquired | a			790		4,306
Purchase price of mineral acreage acquired			$ 5,700,000		$ 11,300,000
Net mineral price per acre | $ / a		2,600	7,200		2,600
Gain (Loss) on Asset Sales [Member}
Summary Of Significant Accounting Policies [Line Items]
Loss on asset sales			$ (243,228)
Eagle Ford Asset [Member]
Summary Of Significant Accounting Policies [Line Items]
Impairment			76,560,376
Other Various Assets [Member]
Summary Of Significant Accounting Policies [Line Items]
Impairment			$ 263,961
Minimum [Member]
Summary Of Significant Accounting Policies [Line Items]
Useful life of furniture and fixtures			5 years
Restricted Stock Awards, vesting period			3 years
Maximum [Member]
Summary Of Significant Accounting Policies [Line Items]
Useful life of furniture and fixtures			8 years
Sales Revenue, Net [Member] | Product Concentration Risk [Member] | Natural Gas [Member]
Summary Of Significant Accounting Policies [Line Items]
Total sale volume from sale of Oil, NGL and Natural gas			68.00%
Sales Revenue, Net [Member] | Product Concentration Risk [Member] | Oil [Member]
Summary Of Significant Accounting Policies [Line Items]
Total sale volume from sale of Oil, NGL and Natural gas			19.00%
Sales Revenue, Net [Member] | Product Concentration Risk [Member] | NGL [Member]
Summary Of Significant Accounting Policies [Line Items]
Total sale volume from sale of Oil, NGL and Natural gas			13.00%

[1] At the end of each quarter, the Company assessed the carrying value of its producing properties for impairment. This assessment utilized estimates of future cash flows or fair value (selling price) less cost to sell if the property is held for sale. 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.