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Asset Retirement Obligations (Tables) | 12 Months Ended
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Jun. 30, 2024
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, 2024 and 2023 (in thousands): ​
​ | ​ | ​ | ​ | ​ | ​ | ​
|  | June 30, 2024 |  | June 30, 2023
Asset retirement obligations — beginning of period | ​ | $ | 17,067 | ​ | $ | 13,921
Liabilities incurred | ​ | ​ | 28 | ​ | ​ | 57
Liabilities settled | ​ | ​ | (39) | ​ | ​ | (136)
Liabilities acquired(1) | ​ | ​ | 90 | ​ | ​ | —
Accretion of discount | ​ | ​ | 1,457 | ​ | ​ | 1,131
Revisions of previous estimates(2) | ​ | ​ | 808 | ​ | ​ | 2,094
Asset retirement obligations — end of period | ​ | ​ | 19,411 | ​ | ​ | 17,067
Less: current asset retirement obligations | ​ | ​ | (202) | ​ | ​ | (55)
Long-term portion of asset retirement obligations | ​ | $ | 19,209 | ​ | $ | 17,012
(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, 2024 and 2023.

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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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