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CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY - USD ($)
shares in Thousands, $ in Thousands
Common Shares and Additional Paid-in Capital
Accumulated Deficit
Noncontrolling Interest
Total
Balance at Dec. 31, 2019 $ 1,530,702 $ (1,031,223)   $ 499,479
Balance (in shares) at Dec. 31, 2019 40,034      
Increase (Decrease) in Shareholders' Equity        
Stock-based compensation $ 613     613
Sale of flow-through shares $ 15,478     15,478
Sale of flow-through shares (in shares) 1,397      
Exercise of stock options $ 138     $ 138
Exercise of stock options (in shares) 14     14
Shares issued for debt refinancing $ 1,875     $ 1,875
Shares issued for debt refinancing (in shares) 209      
Shares issued for acquisition of mineral property interests $ 70     70
Shares issued for acquisition of mineral property interests (in shares) 5      
Net loss   (152,325)   (152,325)
Balance at Dec. 31, 2020 $ 1,548,876 (1,183,548)   365,328
Balance (in shares) at Dec. 31, 2020 41,659      
Increase (Decrease) in Shareholders' Equity        
Stock-based compensation $ 837     837
Sale of flow-through shares $ 10,785     10,785
Sale of flow-through shares (in shares) 1,260      
Sale of shares for cash $ 29,875     29,875
Sale of shares for cash (in shares) 3,000      
Issuance of equity by subsidiary (Note 20) $ 25,051   $ 14,949 40,000
Net loss   (56,712) (172) (56,884)
Balance at Dec. 31, 2021 $ 1,615,424 (1,240,260) 14,777 389,941
Balance (in shares) at Dec. 31, 2021 45,919      
Increase (Decrease) in Shareholders' Equity        
Stock-based compensation $ 340     340
Sale of flow-through shares $ 10,320     10,320
Sale of flow-through shares (in shares) 1,450      
Shares issued for debt refinancing $ 500     500
Shares issued for debt refinancing (in shares) 59      
Issuance of equity by subsidiary (Note 20) $ 17,643   23,707 41,350
Share repurchase (Note 13) (87)     (87)
Exercise of warrants 4     4
Net loss   (81,075) (5,019) (86,094)
Balance at Dec. 31, 2022 $ 1,644,145 $ (1,321,336) $ 33,465 $ 356,274
Balance (in shares) at Dec. 31, 2022 47,428