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Property and Equipment - Summary of Property and Equipment (Details) - USD ($)
Jun. 30, 2019
Jun. 30, 2018
Oil and natural gas properties:    
Property costs subject to amortization $ 95,622,153 $ 90,392,918
Less: Accumulated depreciation, depletion, and amortization (35,275,687) (29,153,172)
Unproved properties not subject to amortization 0 0
Oil and natural gas properties, net 60,346,466 61,239,746
Other property and equipment:    
Furniture, fixtures and office equipment, at cost 154,731 143,223
Less: Accumulated depreciation (128,313) (112,816)
Other property and equipment, net $ 26,418 $ 30,407