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Property and Equipment, Net of Depreciation, Depletion, and Amortization - Summary of Property and Equipment (Details) - USD ($)
3 Months Ended 12 Months Ended
Dec. 31, 2020
Sep. 30, 2020
Dec. 31, 2020
Sep. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Oil and natural gas properties:            
Property costs subject to amortization         $ 129,123,227 $ 107,390,379
Less: Accumulated depreciation, depletion, and amortization and impairment         (70,607,367) (40,878,098)
Unproved properties not subject to amortization         0 0
Oil and natural gas properties, net         58,515,860 66,512,281
Other property and equipment:            
Furniture, fixtures, and office equipment, at cost         154,731 154,731
Less: Accumulated depreciation         (144,092) (137,092)
Other property and equipment, net         10,639 17,639
Depletion         4,901,969 5,592,651
Impairment of proved property $ 15,200,000 $ 9,600,000 $ 15,200,000 $ 9,600,000 24,792,079 0
Depreciation         $ 7,000 $ 8,779