Property and Equipment (Details) $ in Thousands			9 Months Ended	12 Months Ended
	Dec. 31, 2020 USD ($) $ / bbl	Sep. 30, 2020 USD ($) $ / bbl	Mar. 31, 2022 USD ($)	Jun. 30, 2022 USD ($) $ / MMBTU $ / bbl	Jun. 30, 2021 USD ($) $ / bbl $ / MMBTU	Jun. 30, 2020 $ / bbl
Property and Equipment
Depletion				$ 7,500	$ 4,900
Capital expenditures				2,600	600
Proceeds for net revenues received				900
Impairment of proved property	$ 15,200	$ 9,600		$ 0	$ 24,792
Natural Gas and Natural Gas Liquids
Property and Equipment
Oil and gas prices first day average of twelve months of Henry Hub price for ceiling test | $ / MMBTU				5.19	2.46
Net price per barrel (in dollars per barrel) | $ / bbl				44.24	19.81
Crude oil
Property and Equipment
Oil and gas prices first day average of twelve months of West Texas Intermediate spot market price for ceiling test | $ / bbl	39.54	43.63		85.82	49.72	47.37
Maximum
Property and Equipment
Depreciation				$ 100	$ 100
Barnett Shale
Property and Equipment
Downward purchase adjustment			$ 900	$ 900