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Asset Retirement Obligations | 3 Months Ended
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Sep. 30, 2023
Asset Retirement Obligation Disclosure [Abstract] |
Asset Retirement Obligations | 5. Asset Retirement Obligations The change in our ARO during the periods presented and the balance of our accrued reclamation liabilities at the end of each period are set forth below.
|  | September 30, |  |  | June 30, |
|  | 2023 |  |  | 2023 |
|  | (in thousands) |
Asset retirement obligation — beginning of period |  | $ | 724 |  |  | $ | 489 |
Obligation incurred during the period |  |  | — |  |  |  | 31 |
Revisions to previous estimates (1) |  |  | — |  |  |  | 167 |
Accretion |  |  | 17 |  |  |  | 37 |
Asset retirement obligation — end of period |  | $ | 741 |  |  | $ | 724 |
(1) The revision for the prior period is attributable to revised cost estimates provided by a third-party engineering firm and was reflected as an increase to mineral rights and properties (see Note 2).

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- Definition The entire disclosure for an asset retirement obligation and the associated long-lived asset. An asset retirement obligation is a legal obligation associated with the disposal or retirement from service of a tangible long-lived asset that results from the acquisition, construction or development, or the normal operations of a long-lived asset, except for certain obligations of lessees. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 410 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481850/410-20-50-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 410 -SubTopic 20 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org//410-20/tableOfContent Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name Accounting Standards Codification -Section 50 -Paragraph 2 -SubTopic 20 -Topic 410 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481850/410-20-50-2 + Details
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