v3.26.1
Exploration Expenditures - Schedule of Exploration Expenditures (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Mar. 31, 2026
Mar. 31, 2025
Disaggregation of Income Statement Expense, Caption [Line Items]        
Exploration expenditures $ 2,296 $ 495 $ 14,096 $ 894
Exploration reimbursements recognized (603) 0 (687) 0
Net exploration expense 1,693 495 13,409 894
Technical Studies And Engineering [Member]        
Disaggregation of Income Statement Expense, Caption [Line Items]        
Exploration expenditures 1,682 107 7,579 111
Drilling [Member]        
Disaggregation of Income Statement Expense, Caption [Line Items]        
Exploration expenditures 0 0 2,527 0
Field Management and Other [Member]        
Disaggregation of Income Statement Expense, Caption [Line Items]        
Exploration expenditures 508 315 1,689 616
Metallurgical Development [Member]        
Disaggregation of Income Statement Expense, Caption [Line Items]        
Exploration expenditures 98 73 1,307 167
Geologist And Field Staff [Member]        
Disaggregation of Income Statement Expense, Caption [Line Items]        
Exploration expenditures $ 8 $ 0 $ 994 $ 0