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Property and Equipment (Details) - USD ($)
9 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Jun. 30, 2018
Oil and natural gas properties      
Property costs subject to amortization $ 95,099,158   $ 90,392,918
Less: Accumulated depreciation, depletion, and amortization (33,765,225)   (29,153,172)
Unproved properties not subject to amortization 0   0
Oil and natural gas properties, net 61,333,933   61,239,746
Other property and equipment      
Furniture, fixtures, office equipment and other, at cost 145,560   143,223
Less: Accumulated depreciation (125,440)   (112,816)
Other property and equipment, net 20,120   $ 30,407
Delhi field      
Other property and equipment      
Capital expenditures $ 4,700,000 $ 2,300,000