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Consolidated Statements of Operations and Comprehensive Income (Loss) - USD ($)
shares in Thousands, $ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Consolidated Statements of Operations and Comprehensive Income (Loss)      
Revenue from mining operations $ 11,228 $ 16,022 $ 31,746
Cost of sales 7,681 15,832 32,016
Mine operating income (loss) 3,547 190 (270)
Operating expenses      
General and administrative expenses 3,566 2,902 3,193
Share-based payments 1,469 1,857 937
Loss before other items (1,488) (4,569) (4,400)
Interest and other income 178 332 545
Unrealized gain (loss) on long-term investments (423) (124) 1,282
Fair value adjustment on warrant liability 1,581 (650) 520
Realized loss on warrants exercised (1,106) (2,733) 0
Foreign exchange loss (61) (811) (663)
Project evaluation expenses (176) 0 0
Finance cost (52) (211) (84)
Accretion of reclamation provision (47) (99) (104)
Interest expense (24) (25) (64)
Loss from continuing operations before income taxes (1,618) (8,890) (2,968)
Income taxes:      
Current income tax expense 27 161 327
Deferred income tax recovery (expense) (412) 1,569 960
Income tax recovery (expense) 439 (1,408) (633)
Net loss from continuing operations (2,057) (7,482) (2,335)
Loss from discontinued operations and on disposal 0 (169) (29,126)
Net loss (2,057) (7,651) (31,461)
Items that may be reclassified subsequently to income or loss:      
Currency translation differences (159) (247) 1,603
Reclassification of foreign exchange on translation into net loss on sale of discontinued operations 0 0 (42)
Total comprehensive loss $ (2,216) $ (7,898) $ (29,900)
Loss per share from continuing operations      
Loss per share from continuing operations Basic $ (0.02) $ (0.09) $ (0.03)
Loss per share from continuing operations Diluted (0.02) (0.09) (0.03)
Loss per share      
Loss per share Basic (0.02) (0.09) (0.45)
Loss per share Diluted $ (0.02) $ (0.09) $ (0.45)
Weighted average number of common shares outstanding      
Weighted average number of common shares outstanding Basic 100,161,357 83,180,069 69,980,178
Weighted average number of common shares outstanding Diluted 100,161,357 83,180,069 69,980,178