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Asset Retirement Obligations (Tables) | 12 Months Ended
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Jun. 30, 2025
Asset Retirement Obligations |
Schedule of Reconciliations of the Beginning and Ending Asset Retirement Obligation Balances | ​ The following is a reconciliation of the activity related to the Company’s ARO liability (inclusive of the current portion) for the years ended June 30, 2025 and 2024 (in thousands): ​
​ | ​ | ​ | ​ | ​ | ​ | ​
|  | June 30, 2025 |  | June 30, 2024
Asset retirement obligations — beginning of period | ​ | $ | 19,411 | ​ | $ | 17,067
Liabilities incurred | ​ | ​ | 9 | ​ | ​ | 28
Liabilities settled | ​ | ​ | (230) | ​ | ​ | (39)
Liabilities acquired(1) | ​ | ​ | 303 | ​ | ​ | 90
Accretion of discount | ​ | ​ | 1,619 | ​ | ​ | 1,457
Revisions of previous estimates(2) | ​ | ​ | 718 | ​ | ​ | 808
Asset retirement obligations — end of period | ​ | ​ | 21,830 | ​ | ​ | 19,411
Less: current asset retirement obligations | ​ | ​ | (295) | ​ | ​ | (202)
Long-term portion of asset retirement obligations | ​ | $ | 21,535 | ​ | $ | 19,209
(1) | See Note 3, “Acquisitions,” for additional information on the Company’s acquisition activities.
(2) | Primarily related to upward revisions for increased cost estimates for the years ended June 30, 2025 and 2024.

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- Definition Tabular disclosure of the changes in carrying amount of a liability for asset retirement obligations, for changes such as new obligations, changes in estimates of existing obligations, spending on existing obligations, property dispositions, and foreign currency translation. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 410 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481850/410-20-50-1 + Details
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