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CONSOLIDATED STATEMENTS OF INCOME/(LOSS) AND COMPREHENSIVE INCOME/(LOSS) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Operating income/(expense):    
Gain on disposal of mineral property interests, net (Note 4) $ 6,108  
Exploration, property evaluation and holding costs (4,545) $ (4,093)
Corporate administration (3,777) (3,940)
Depreciation and amortization (48) (52)
Total operating income/(expense) (2,262) (8,085)
Non-operating income/(expense):    
Gain/(loss) on other investments (Note 3) 2,405 (1,643)
Interest income 16 121
Other income 261 221
Total non-operating income/(expense) 2,682 (1,301)
Income/(loss) before income taxes 420 (9,386)
Net income/(loss) $ 420 $ (9,386)
Basic:    
Weighted average number of shares outstanding (in shares) 101,814,139 100,533,448
Net income/(loss) per share (Note 6), Basic (in dollars per share) $ 0.00 $ (0.09)
Diluted:    
Weighted average number of shares outstanding (in shares) 104,478,920 100,533,448
Net income/(loss) per share, Diluted (in dollars per share) $ 0.00 $ (0.09)