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CONSOLIDATED STATEMENTS OF INCOME/(LOSS) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Operating income/(expense):    
Gain on disposal of mineral property interests (Note 4) $ 2,883 $ 2,100
Exploration, property evaluation and holding costs (4,522) (7,942)
Corporate administration (3,767) (3,945)
Depreciation and amortization (45) (49)
Write-down of plant and equipment (Note 5)   (5,500)
Total operating expense (5,451) (15,336)
Non-operating income:    
Gain on other investments   46
Interest income 111 3
Other income 409 50
Total non-operating income 520 99
Loss before income taxes (4,931) (15,237)
Net loss $ (4,931) $ (15,237)
Basic:    
Weighted average number of shares outstanding (in shares) 118,005,490 110,263,237
Net loss per share $ (0.04) $ (0.14)
Diluted:    
Weighted average number of shares outstanding (in shares) 118,005,490 110,263,237
Net loss per share $ (0.04) $ (0.14)