v3.26.1
Segment Reporting - Schedule of Segment Expense and Reconciled to Net Loss Before Taxes (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Operating expenses:    
Exploration expenses $ 2,065 $ 50
General and administrative expenses 2,716 249
Depreciation expense 23 1
Operating loss (4,804) (300)
Corporate and other expenses 2,380 137
Interest income 127 0
Interest expense 45 1
Foreign exchange loss 4 0
Change in fair value of SAFE (3,409) 0
Change in fair value of warrants (8,646) 0
Loss before income taxes (16,781) (301)
Operating Segments    
Operating expenses:    
Exploration expenses 2,065 50
General and administrative expenses 336 112
Depreciation expense 23 1
Operating loss (2,424) (163)
United States Mining Operations | Operating Segments    
Operating expenses:    
Exploration expenses 1,865 0
General and administrative expenses 13 0
Depreciation expense 22 0
Operating loss (1,900) 0
Brazil Mining Operations | Operating Segments    
Operating expenses:    
Exploration expenses 200 50
General and administrative expenses 323 112
Depreciation expense 1 1
Operating loss $ (524) $ (163)