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UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF INCOME (LOSS) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2022
Jun. 30, 2021
Operating income/(expense):        
Gain on disposal of mineral property interests (Note 4)   $ 2,100 $ 2,883 $ 2,100
Exploration, property evaluation and holding costs $ (984) (1,986) (2,773) (3,737)
Corporate administration (876) (931) (2,277) (2,246)
Depreciation and amortization (10) (12) (24) (23)
Total operating expense (1,870) (829) (2,191) (3,906)
Non-operating income/(expense):        
Gain on other investments   77   47
Interest income 9   10 1
Other income/(loss) 437 (1) 437 6
Total non-operating income 446 76 447 54
Loss before income taxes (1,424) (753) (1,744) (3,852)
Net loss $ (1,424) $ (753) $ (1,744) $ (3,852)
Basic:        
Weighted average number of shares outstanding (in shares) 118,080,896 104,565,060 117,764,401 104,041,466
Net loss per share $ (0.01) $ (0.01) $ (0.01) $ (0.04)
Diluted:        
Weighted average number of shares outstanding (in shares) 118,080,896 104,565,060 117,764,401 104,041,466
Net loss per share $ (0.01) $ (0.01) $ (0.01) $ (0.04)