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Supplemental Disclosures about Oil and Natural Gas Producing Properties (unaudited) - Roll Forward of Changes in Standardized Measure of Discount Future Cash Flows on Proved Crude Oil, Natural Gas Liquids, and Natural Gas Reserves (Details) - USD ($)
 12 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Changes in the standardized measure of discounted future net cash flows applicable to proved crude oil, natural gas liquids, and natural gas reserves    
Balance, beginning of the fiscal year $ 62,490,836 $ 126,732,042
Net changes in sales prices and production costs related to future production 11,538,209 (83,857,342)
Changes in estimated future development costs 403,109 (4,099,792)
Sales of oil and gas produced during the period, net of production costs (16,115,302) (16,093,794)
Net change due to extensions, discoveries, and improved recovery 0 0
Net change due to revisions in quantity estimates 6,840,767 (6,746,316)
Net change due to purchase of minerals in place 31,461,405 10,364,875
Development costs incurred during the period 0 1,431,444
Accretion of discount 7,529,289 16,266,663
Net change in discounted income taxes (10,678,450) 17,078,591
Net changes in timing of production and other (5,887,312) 1,414,465
Balance, end of the fiscal year $ 87,582,551 $ 62,490,836