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Acquisitions (Details) - USD ($) $ in Thousands				9 Months Ended	12 Months Ended
Acquisitions (Details) - USD ($) $ in Thousands	Apr. 01, 2022	Jan. 14, 2022	May 07, 2021	Mar. 31, 2022	Jun. 30, 2022	Jun. 30, 2021
Acquisitions
Liabilities acquired					$ 5,400	$ 2,806
Asset retirement obligation liabilities incurred					219
Borrowings under credit facility					34,000	$ 7,000
Barnett Shale
Acquisitions
Liabilities acquired			$ 2,800
Non-operating working interest, percent			17.00%
Revenue interest, percent			14.00%
Purchase price of oil and gas assets			$ 17,400
Downward purchase adjustment				$ 900	$ 900
Jonah Field In Wyoming From Exaro Energy III, LLC
Acquisitions
Asset acquisition of transaction cost	$ 200
Asset acquisition, consideration transferred related to deposits transferred	1,600
Liabilities acquired	3,000
Purchase price of oil and gas assets	26,400
Jonah Field In Wyoming From Exaro Energy III, LLC \| Oil and natural gas properties
Acquisitions
Asset acquisition, consideration transferred	24,800
Jonah Field In Wyoming From Exaro Energy III, LLC \| Other assets, net
Acquisitions
Asset acquisition for deposits	1,200
Williston Basin Acquisition
Acquisitions
Asset acquisition of transaction cost		$ 300
Liabilities acquired		2,400
Purchase price of oil and gas assets		25,200
Senior Secured Reserve-Based Credit Facility \| Jonah Field In Wyoming From Exaro Energy III, LLC
Acquisitions
Borrowings under credit facility	$ 17,000
Senior Secured Reserve-Based Credit Facility \| Williston Basin Acquisition
Acquisitions
Borrowings under credit facility		$ 16,000