XML 63 R39.htm IDEA: XBRL DOCUMENT v3.22.2.2
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
Jun. 30, 2022
Jun. 30, 2021
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