Property and Equipment - Schedule of oil and natural gas properties and other property and equipment (Details)	3 Months Ended
	Sep. 30, 2020 USD ($) $ / bbl	Sep. 30, 2019 USD ($)	Jun. 30, 2020 USD ($)
Oil and natural gas properties:
Property costs subject to amortization	$ 106,983,381		$ 107,390,379
Less: Accumulated depreciation, depletion, amortization and impairment	(51,246,304)		(40,878,098)
Oil and natural gas properties, net	55,737,077		66,512,281
Other property and equipment:
Furniture, fixtures, and office equipment, at cost	154,731		154,731
Less: Accumulated depreciation	(138,902)		(137,092)
Other property and equipment, net	15,829		$ 17,639
Property, Plant and Equipment [Line Items]
Capital expenditures	200,000	$ 600,000
Proved property impairment	$ 9,602,620	$ 0
Natural Gas and Natural Gas Liquids
Property, Plant and Equipment [Line Items]
Net price per barrel (in dollars per barrel) | $ / bbl	7.85