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Property and Equipment - Schedule of oil and natural gas properties and other property and equipment (Details) - USD ($)
3 Months Ended 6 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2021
Dec. 31, 2020
Jun. 30, 2021
Oil and natural gas properties:          
Property costs subject to amortization $ 128,903,479   $ 128,903,479   $ 129,123,227
Less: Accumulated depreciation, depletion, amortization and impairment (73,151,440)   (73,151,440)   (70,607,367)
Oil and natural gas properties, net 55,752,039   55,752,039   58,515,860
Other property and equipment:          
Furniture, fixtures, and office equipment, at cost 154,732   154,732   154,731
Less: Accumulated depreciation, depletion, amortization and impairment (147,995)   (147,995)   (144,092)
Other property and equipment, net 6,737   6,737   $ 10,639
Depletion     2,544,072 $ 2,670,801  
Impairment of proved property $ 0 $ 15,189,459 0 24,792,079  
Depreciation     $ 3,902 $ 3,620