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Additional Financial Statement Information - Consolidated Balance Sheets (Details) - USD ($)
$ in Thousands
Sep. 30, 2025
Jun. 30, 2025
Prepaid expenses and other current assets:    
Other receivables $ 376 $ 227
Prepaid insurance 528 701
Prepaid federal and state income taxes   706
Advances to operators 18 316
Prepaid other 313 337
Total prepaid expenses and other current assets 1,235 2,287
Other assets:    
Deposit 8 8
Debt issuance costs 429 365
Right of use asset under operating lease $ 37 $ 58
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration] Total other assets Total other assets
Total other assets $ 474 $ 431
Accrued liabilities and other:    
Accrued payables 2,470 2,937
Accrued capital expenditures 149 421
Accrued incentive and other compensation 432 1,472
Accrued royalties payable 476 417
Accrued taxes other than federal and state income tax 1,585 1,283
Operating lease liability $ 42 $ 66
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List] Accrued liabilities and other Accrued liabilities and other
Asset retirement obligations due within one year $ 262 $ 295
Accrued interest and other 27 18
Total accrued liabilities and other $ 5,443 $ 6,909