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Property and Equipment - Schedule of oil and natural gas properties and other property and equipment (Details) - USD ($)
Dec. 31, 2020
Jun. 30, 2020
Oil and natural gas properties:    
Property costs subject to amortization $ 107,610,555 $ 107,390,379
Less: Accumulated depreciation, depletion, amortization and impairment (68,339,820) (40,878,098)
Oil and natural gas properties, net 39,270,735 66,512,281
Other property and equipment:    
Furniture, fixtures, and office equipment, at cost 154,731 154,731
Less: Accumulated depreciation (140,712) (137,092)
Other property and equipment, net $ 14,019 $ 17,639