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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
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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

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