Asset Retirement Obligations and Accrued Reclamation Liabilities - Schedule Of Change In Asset Retirement Obligation And Balance Of Reclamation Liabilities Including Asset Retirement Obligation Non Current (Detail) - USD ($) $ in Thousands |
12 Months Ended | |
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Jun. 30, 2022 |
Jun. 30, 2021 |
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Disclosure For Asset Retirement Obligations and Accrued Reclamation Liabilities [Abstract] | ||
Asset retirement obligation—beginning of period | $ 79 | $ 0 |
Obligation incurred during the period | 106 | 79 |
Revisions to previous estimates | (3) | 0 |
Accretion | 9 | 0 |
Asset retirement obligation—end of period | 191 | 79 |
Accrued reclamation costs | 298 | 298 |
Total accrued reclamation liabilities | $ 489 | $ 377 |