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CONSOLIDATED STATEMENTS OF INCOME (LOSS) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Operating income/(expense):    
Gain on disposal of mineral property interests, net (Note 4) $ 2,100 $ 6,108
Exploration, property evaluation and holding costs (7,942) (4,545)
Corporate administration (3,945) (3,777)
Depreciation and amortization (49) (48)
Write-down of plant and equipment (Note 5) (5,500)  
Total operating expense (15,336) (2,262)
Non-operating income:    
Gain on other investments (Note 3) 46 2,405
Interest income 3 16
Other income 50 261
Total non-operating income 99 2,682
Income/(loss) before income taxes (15,237) 420
Net income/(loss) $ (15,237) $ 420
Basic:    
Weighted average number of shares outstanding (in shares) 110,263,237 101,814,139
Net income/(loss) per share $ (0.14) $ 0.00
Diluted:    
Weighted average number of shares outstanding (in shares) 110,263,237 104,478,920
Net income/(loss) per share $ (0.14) $ 0.00