v3.25.2
MINERAL PROPERTIES - Schedule of exploration expenditures recorded on the statement of loss and comprehensive loss (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Oil and Gas, Cost Incurred, Property Acquisition, Exploration, and Development [Line Items]        
Exploration and evaluation $ 987 $ 2,389 $ 2,150 $ 5,049
Property maintenance [Member]        
Oil and Gas, Cost Incurred, Property Acquisition, Exploration, and Development [Line Items]        
Exploration and evaluation 13 275 67 469
Assay & Labs [Member]        
Oil and Gas, Cost Incurred, Property Acquisition, Exploration, and Development [Line Items]        
Exploration and evaluation 21 148 30 242
Drilling [Member]        
Oil and Gas, Cost Incurred, Property Acquisition, Exploration, and Development [Line Items]        
Exploration and evaluation   1,233 119 3,010
Environmental [Member]        
Oil and Gas, Cost Incurred, Property Acquisition, Exploration, and Development [Line Items]        
Exploration and evaluation 88 278 239 500
Geophysical surveys [Member]        
Oil and Gas, Cost Incurred, Property Acquisition, Exploration, and Development [Line Items]        
Exploration and evaluation 1 31 11 74
Technical study [Member]        
Oil and Gas, Cost Incurred, Property Acquisition, Exploration, and Development [Line Items]        
Exploration and evaluation 840 420 1,640 705
Field support [Member]        
Oil and Gas, Cost Incurred, Property Acquisition, Exploration, and Development [Line Items]        
Exploration and evaluation 24 4 44 49
Nuton LLC [Member]        
Oil and Gas, Cost Incurred, Property Acquisition, Exploration, and Development [Line Items]        
Exploration and evaluation (963) (2,343) (2,051) (4,930)
Lion CG [Member]        
Oil and Gas, Cost Incurred, Property Acquisition, Exploration, and Development [Line Items]        
Exploration and evaluation 24 46 99 119
Singatse Peak Services [Member] | MacArthur [Member]        
Oil and Gas, Cost Incurred, Property Acquisition, Exploration, and Development [Line Items]        
Exploration and evaluation 27 108 60 519
Singatse Peak Services [Member] | MacArthur [Member] | Property maintenance [Member]        
Oil and Gas, Cost Incurred, Property Acquisition, Exploration, and Development [Line Items]        
Exploration and evaluation 6 4 6 4
Singatse Peak Services [Member] | MacArthur [Member] | Assay & Labs [Member]        
Oil and Gas, Cost Incurred, Property Acquisition, Exploration, and Development [Line Items]        
Exploration and evaluation 0 69 0 109
Singatse Peak Services [Member] | MacArthur [Member] | Drilling [Member]        
Oil and Gas, Cost Incurred, Property Acquisition, Exploration, and Development [Line Items]        
Exploration and evaluation   16 0 366
Singatse Peak Services [Member] | MacArthur [Member] | Environmental [Member]        
Oil and Gas, Cost Incurred, Property Acquisition, Exploration, and Development [Line Items]        
Exploration and evaluation 0 19 1 40
Singatse Peak Services [Member] | MacArthur [Member] | Geophysical surveys [Member]        
Oil and Gas, Cost Incurred, Property Acquisition, Exploration, and Development [Line Items]        
Exploration and evaluation 0 0 0 0
Singatse Peak Services [Member] | MacArthur [Member] | Technical study [Member]        
Oil and Gas, Cost Incurred, Property Acquisition, Exploration, and Development [Line Items]        
Exploration and evaluation 21 0 53 0
Singatse Peak Services [Member] | MacArthur [Member] | Field support [Member]        
Oil and Gas, Cost Incurred, Property Acquisition, Exploration, and Development [Line Items]        
Exploration and evaluation 0 0 0 0
Singatse Peak Services [Member] | MacArthur [Member] | Nuton LLC [Member]        
Oil and Gas, Cost Incurred, Property Acquisition, Exploration, and Development [Line Items]        
Exploration and evaluation (27) (108) (60) (519)
Singatse Peak Services [Member] | MacArthur [Member] | Lion CG [Member]        
Oil and Gas, Cost Incurred, Property Acquisition, Exploration, and Development [Line Items]        
Exploration and evaluation 0 0 0 0
Singatse Peak Services [Member] | Yerington [Member]        
Oil and Gas, Cost Incurred, Property Acquisition, Exploration, and Development [Line Items]        
Exploration and evaluation 912 1,624 1,961 2,884
Singatse Peak Services [Member] | Yerington [Member] | Property maintenance [Member]        
Oil and Gas, Cost Incurred, Property Acquisition, Exploration, and Development [Line Items]        
Exploration and evaluation 0 248 0 405
Singatse Peak Services [Member] | Yerington [Member] | Assay & Labs [Member]        
Oil and Gas, Cost Incurred, Property Acquisition, Exploration, and Development [Line Items]        
Exploration and evaluation 1 36 10 89
Singatse Peak Services [Member] | Yerington [Member] | Drilling [Member]        
Oil and Gas, Cost Incurred, Property Acquisition, Exploration, and Development [Line Items]        
Exploration and evaluation   655 119 1,179
Singatse Peak Services [Member] | Yerington [Member] | Environmental [Member]        
Oil and Gas, Cost Incurred, Property Acquisition, Exploration, and Development [Line Items]        
Exploration and evaluation 88 259 238 460
Singatse Peak Services [Member] | Yerington [Member] | Geophysical surveys [Member]        
Oil and Gas, Cost Incurred, Property Acquisition, Exploration, and Development [Line Items]        
Exploration and evaluation 0 5 0 45
Singatse Peak Services [Member] | Yerington [Member] | Technical study [Member]        
Oil and Gas, Cost Incurred, Property Acquisition, Exploration, and Development [Line Items]        
Exploration and evaluation 817 420 1,580 705
Singatse Peak Services [Member] | Yerington [Member] | Field support [Member]        
Oil and Gas, Cost Incurred, Property Acquisition, Exploration, and Development [Line Items]        
Exploration and evaluation 6 1 14 1
Singatse Peak Services [Member] | Yerington [Member] | Nuton LLC [Member]        
Oil and Gas, Cost Incurred, Property Acquisition, Exploration, and Development [Line Items]        
Exploration and evaluation (912) (1,624) (1,961) (2,884)
Singatse Peak Services [Member] | Yerington [Member] | Lion CG [Member]        
Oil and Gas, Cost Incurred, Property Acquisition, Exploration, and Development [Line Items]        
Exploration and evaluation 0 0 0 0
Singatse Peak Services [Member] | Bear Deposit [Member]        
Oil and Gas, Cost Incurred, Property Acquisition, Exploration, and Development [Line Items]        
Exploration and evaluation 24 611 29 1,527
Singatse Peak Services [Member] | Bear Deposit [Member] | Property maintenance [Member]        
Oil and Gas, Cost Incurred, Property Acquisition, Exploration, and Development [Line Items]        
Exploration and evaluation 0 0 0 0
Singatse Peak Services [Member] | Bear Deposit [Member] | Assay & Labs [Member]        
Oil and Gas, Cost Incurred, Property Acquisition, Exploration, and Development [Line Items]        
Exploration and evaluation 20 43 20 44
Singatse Peak Services [Member] | Bear Deposit [Member] | Drilling [Member]        
Oil and Gas, Cost Incurred, Property Acquisition, Exploration, and Development [Line Items]        
Exploration and evaluation   562 0 1,465
Singatse Peak Services [Member] | Bear Deposit [Member] | Environmental [Member]        
Oil and Gas, Cost Incurred, Property Acquisition, Exploration, and Development [Line Items]        
Exploration and evaluation 0 0 0 0
Singatse Peak Services [Member] | Bear Deposit [Member] | Geophysical surveys [Member]        
Oil and Gas, Cost Incurred, Property Acquisition, Exploration, and Development [Line Items]        
Exploration and evaluation 0 (1) 0 0
Singatse Peak Services [Member] | Bear Deposit [Member] | Technical study [Member]        
Oil and Gas, Cost Incurred, Property Acquisition, Exploration, and Development [Line Items]        
Exploration and evaluation 2 0 7 0
Singatse Peak Services [Member] | Bear Deposit [Member] | Field support [Member]        
Oil and Gas, Cost Incurred, Property Acquisition, Exploration, and Development [Line Items]        
Exploration and evaluation 2 7 2 18
Singatse Peak Services [Member] | Bear Deposit [Member] | Nuton LLC [Member]        
Oil and Gas, Cost Incurred, Property Acquisition, Exploration, and Development [Line Items]        
Exploration and evaluation (24) (611) (29) (1,527)
Singatse Peak Services [Member] | Bear Deposit [Member] | Lion CG [Member]        
Oil and Gas, Cost Incurred, Property Acquisition, Exploration, and Development [Line Items]        
Exploration and evaluation 0 0 0 0
Singatse Peak Services [Member] | Wassuk [Member]        
Oil and Gas, Cost Incurred, Property Acquisition, Exploration, and Development [Line Items]        
Exploration and evaluation 0 0 1 0
Singatse Peak Services [Member] | Wassuk [Member] | Property maintenance [Member]        
Oil and Gas, Cost Incurred, Property Acquisition, Exploration, and Development [Line Items]        
Exploration and evaluation 0 0 1 0
Singatse Peak Services [Member] | Wassuk [Member] | Assay & Labs [Member]        
Oil and Gas, Cost Incurred, Property Acquisition, Exploration, and Development [Line Items]        
Exploration and evaluation 0 0 0 0
Singatse Peak Services [Member] | Wassuk [Member] | Drilling [Member]        
Oil and Gas, Cost Incurred, Property Acquisition, Exploration, and Development [Line Items]        
Exploration and evaluation   0 0 0
Singatse Peak Services [Member] | Wassuk [Member] | Environmental [Member]        
Oil and Gas, Cost Incurred, Property Acquisition, Exploration, and Development [Line Items]        
Exploration and evaluation 0 0 0 0
Singatse Peak Services [Member] | Wassuk [Member] | Geophysical surveys [Member]        
Oil and Gas, Cost Incurred, Property Acquisition, Exploration, and Development [Line Items]        
Exploration and evaluation 0 0 0 0
Singatse Peak Services [Member] | Wassuk [Member] | Technical study [Member]        
Oil and Gas, Cost Incurred, Property Acquisition, Exploration, and Development [Line Items]        
Exploration and evaluation 0 0 0 0
Singatse Peak Services [Member] | Wassuk [Member] | Field support [Member]        
Oil and Gas, Cost Incurred, Property Acquisition, Exploration, and Development [Line Items]        
Exploration and evaluation 0 0 0 0
Singatse Peak Services [Member] | Wassuk [Member] | Nuton LLC [Member]        
Oil and Gas, Cost Incurred, Property Acquisition, Exploration, and Development [Line Items]        
Exploration and evaluation 0 0 (1) 0
Singatse Peak Services [Member] | Wassuk [Member] | Lion CG [Member]        
Oil and Gas, Cost Incurred, Property Acquisition, Exploration, and Development [Line Items]        
Exploration and evaluation 0 0 0 0
Falcon Copper Corp [Member] | Blue Copper [Member]        
Oil and Gas, Cost Incurred, Property Acquisition, Exploration, and Development [Line Items]        
Exploration and evaluation 23 32 66 88
Falcon Copper Corp [Member] | Blue Copper [Member] | Property maintenance [Member]        
Oil and Gas, Cost Incurred, Property Acquisition, Exploration, and Development [Line Items]        
Exploration and evaluation 7 23 38 60
Falcon Copper Corp [Member] | Blue Copper [Member] | Assay & Labs [Member]        
Oil and Gas, Cost Incurred, Property Acquisition, Exploration, and Development [Line Items]        
Exploration and evaluation 0 0 0 0
Falcon Copper Corp [Member] | Blue Copper [Member] | Drilling [Member]        
Oil and Gas, Cost Incurred, Property Acquisition, Exploration, and Development [Line Items]        
Exploration and evaluation   0 0 0
Falcon Copper Corp [Member] | Blue Copper [Member] | Environmental [Member]        
Oil and Gas, Cost Incurred, Property Acquisition, Exploration, and Development [Line Items]        
Exploration and evaluation 0 0 0 0
Falcon Copper Corp [Member] | Blue Copper [Member] | Geophysical surveys [Member]        
Oil and Gas, Cost Incurred, Property Acquisition, Exploration, and Development [Line Items]        
Exploration and evaluation 0 0 0 0
Falcon Copper Corp [Member] | Blue Copper [Member] | Technical study [Member]        
Oil and Gas, Cost Incurred, Property Acquisition, Exploration, and Development [Line Items]        
Exploration and evaluation 0 0 0 0
Falcon Copper Corp [Member] | Blue Copper [Member] | Field support [Member]        
Oil and Gas, Cost Incurred, Property Acquisition, Exploration, and Development [Line Items]        
Exploration and evaluation 16 9 28 28
Falcon Copper Corp [Member] | Blue Copper [Member] | Nuton LLC [Member]        
Oil and Gas, Cost Incurred, Property Acquisition, Exploration, and Development [Line Items]        
Exploration and evaluation 0 0 0 0
Falcon Copper Corp [Member] | Blue Copper [Member] | Lion CG [Member]        
Oil and Gas, Cost Incurred, Property Acquisition, Exploration, and Development [Line Items]        
Exploration and evaluation 23 32 66 88
Falcon Copper Corp [Member] | Muncy [Member]        
Oil and Gas, Cost Incurred, Property Acquisition, Exploration, and Development [Line Items]        
Exploration and evaluation 1 27 11 29
Falcon Copper Corp [Member] | Muncy [Member] | Property maintenance [Member]        
Oil and Gas, Cost Incurred, Property Acquisition, Exploration, and Development [Line Items]        
Exploration and evaluation 0 0 0 0
Falcon Copper Corp [Member] | Muncy [Member] | Assay & Labs [Member]        
Oil and Gas, Cost Incurred, Property Acquisition, Exploration, and Development [Line Items]        
Exploration and evaluation 0 0 0 0
Falcon Copper Corp [Member] | Muncy [Member] | Drilling [Member]        
Oil and Gas, Cost Incurred, Property Acquisition, Exploration, and Development [Line Items]        
Exploration and evaluation   0 0 0
Falcon Copper Corp [Member] | Muncy [Member] | Environmental [Member]        
Oil and Gas, Cost Incurred, Property Acquisition, Exploration, and Development [Line Items]        
Exploration and evaluation 0 0 0 0
Falcon Copper Corp [Member] | Muncy [Member] | Geophysical surveys [Member]        
Oil and Gas, Cost Incurred, Property Acquisition, Exploration, and Development [Line Items]        
Exploration and evaluation 1 27 11 29
Falcon Copper Corp [Member] | Muncy [Member] | Technical study [Member]        
Oil and Gas, Cost Incurred, Property Acquisition, Exploration, and Development [Line Items]        
Exploration and evaluation 0 0 0 0
Falcon Copper Corp [Member] | Muncy [Member] | Field support [Member]        
Oil and Gas, Cost Incurred, Property Acquisition, Exploration, and Development [Line Items]        
Exploration and evaluation 0 0 0 0
Falcon Copper Corp [Member] | Muncy [Member] | Nuton LLC [Member]        
Oil and Gas, Cost Incurred, Property Acquisition, Exploration, and Development [Line Items]        
Exploration and evaluation 0 0 0 0
Falcon Copper Corp [Member] | Muncy [Member] | Lion CG [Member]        
Oil and Gas, Cost Incurred, Property Acquisition, Exploration, and Development [Line Items]        
Exploration and evaluation 1 27 11 29
Falcon Copper Corp [Member] | Other [Member]        
Oil and Gas, Cost Incurred, Property Acquisition, Exploration, and Development [Line Items]        
Exploration and evaluation 0 (13) 22 2
Falcon Copper Corp [Member] | Other [Member] | Property maintenance [Member]        
Oil and Gas, Cost Incurred, Property Acquisition, Exploration, and Development [Line Items]        
Exploration and evaluation 0 0 22 0
Falcon Copper Corp [Member] | Other [Member] | Assay & Labs [Member]        
Oil and Gas, Cost Incurred, Property Acquisition, Exploration, and Development [Line Items]        
Exploration and evaluation 0 0 0 0
Falcon Copper Corp [Member] | Other [Member] | Drilling [Member]        
Oil and Gas, Cost Incurred, Property Acquisition, Exploration, and Development [Line Items]        
Exploration and evaluation   0 0 0
Falcon Copper Corp [Member] | Other [Member] | Environmental [Member]        
Oil and Gas, Cost Incurred, Property Acquisition, Exploration, and Development [Line Items]        
Exploration and evaluation 0 0 0 0
Falcon Copper Corp [Member] | Other [Member] | Geophysical surveys [Member]        
Oil and Gas, Cost Incurred, Property Acquisition, Exploration, and Development [Line Items]        
Exploration and evaluation 0 0 0 0
Falcon Copper Corp [Member] | Other [Member] | Technical study [Member]        
Oil and Gas, Cost Incurred, Property Acquisition, Exploration, and Development [Line Items]        
Exploration and evaluation 0 0 0 0
Falcon Copper Corp [Member] | Other [Member] | Field support [Member]        
Oil and Gas, Cost Incurred, Property Acquisition, Exploration, and Development [Line Items]        
Exploration and evaluation 0 (13) 0 2
Falcon Copper Corp [Member] | Other [Member] | Nuton LLC [Member]        
Oil and Gas, Cost Incurred, Property Acquisition, Exploration, and Development [Line Items]        
Exploration and evaluation 0 0 0 0
Falcon Copper Corp [Member] | Other [Member] | Lion CG [Member]        
Oil and Gas, Cost Incurred, Property Acquisition, Exploration, and Development [Line Items]        
Exploration and evaluation $ 0 $ (13) $ 22 $ 2