Property and Equipment - Other (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Jun. 30, 2021
Oil and natural gas properties
Property costs subject to amortization	$ 188,634	$ 129,123
Less: Accumulated depletion, depreciation, and amortization	(78,126)	(70,607)
Oil and natural gas properties, net	110,508	58,516
Other property and equipment
Furniture, fixtures, and office equipment, at cost	148	155
Less: Accumulated depreciation	$ (148)	(144)
Other property and equipment, net		$ 11