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Supplemental Disclosures about Oil and Natural Gas Producing Properties (unaudited) - Standardized Measure of Discounted Future Net Cash Flows Related to Proved Oil and Natural Gas Reserves (Details) - USD ($)	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2019
Standardized measure of discounted future net cash flows
Future cash inflows	$ 632,620,246	$ 399,358,481
Future production costs and severance taxes	(398,021,728)	(240,399,715)
Future development costs	(29,339,399)	(24,623,426)
Future income tax expenses	(42,368,085)	(21,982,469)
Future net cash flows	162,891,034	112,352,871
10% annual discount for estimated timing of cash flows	(75,308,483)	(49,862,035)
Standardized measure of discounted future net cash flows	$ 87,582,551	$ 62,490,836	$ 126,732,042

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Amount of estimated future accumulated cash inflow from the sale of proved oil and gas reserves.

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Amount of estimated future accumulated cash outflow for costs to be incurred in developing proved oil and gas reserves.

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Amount of estimated future accumulated cash outflow for income tax, based on the future income less future expense derived from production and sale of proved oil and gas reserves.

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