v3.26.1
COMMON SHARES - Schedule of Issued Share Capital (Details)
$ / shares in Units, $ / shares in Units, $ in Thousands, $ in Millions
 3 Months Ended 6 Months Ended
Jun. 26, 2026
USD ($)
oz
shares
May 16, 2025
USD ($)
$ / shares
shares
Feb. 28, 2025
USD ($)
shares
Feb. 28, 2025
CAD ($)
$ / shares
shares
Jan. 31, 2025
USD ($)
shares
Jan. 31, 2025
CAD ($)
$ / shares
shares
Jun. 30, 2026
USD ($)
$ / shares
shares
Mar. 31, 2026
USD ($)
shares
Jun. 30, 2025
USD ($)
shares
Mar. 31, 2025
USD ($)
shares
Jun. 30, 2026
USD ($)
$ / shares
shares
Jun. 30, 2025
USD ($)
shares
Dec. 31, 2025
USD ($)
shares
Increase (Decrease) in Stockholders' Equity [Roll Forward]                          
Beginning balance (in shares) | shares               827,230,192     827,230,192    
Beginning balance             $ 298,896 $ 346,773 $ 317,958 $ 340,664 $ 346,773 $ 340,664  
Share-based compensation             932 2,669 332 58      
Issued on exercise of warrants (in shares) | shares                     541,341    
Exercise of warrants             $ 5,950 9,524          
Ending balance (in shares) | shares             865,901,683       865,901,683    
Ending balance             $ 258,047 298,896 463,540 317,958 $ 258,047 $ 463,540  
Common shares, issued (in shares) | shares             865,901,683       865,901,683   827,230,192
Common shares, unlimited authorized shares with no par value, 865,901,683 and 827,230,192 shares issued and outstanding as of June 30, 2026 and December 31, 2025, respectively             $ 843,207       $ 843,207   $ 799,855
Issued from financing activities             $ 4,796 $ 18,531 $ 175,465 $ 18,441      
2023 Convertible Debentures | Convertible loans                          
Increase (Decrease) in Stockholders' Equity [Roll Forward]                          
Shares issued (in shares) | shares               8,100,000          
Orion Convertible Loan | Convertible loans                          
Increase (Decrease) in Stockholders' Equity [Roll Forward]                          
Shares issued (in shares) | shares                     3,000,000.0    
Net proceeds from warrants issued                     $ 5,200    
Common Stock Warrants                          
Increase (Decrease) in Stockholders' Equity [Roll Forward]                          
Total gross proceeds                     $ 15,500    
Exercise price of warrants or rights (per share) | $ / shares             $ 0.70       $ 0.70    
Number of securities called by each warrant (in shares) | shares             22,100,000       22,100,000    
Common Stock                          
Increase (Decrease) in Stockholders' Equity [Roll Forward]                          
Beginning balance (in shares) | shares             853,481,397 827,230,192 443,358,811 409,786,957 827,230,192 409,786,957  
Beginning balance             $ 831,239 $ 799,855 $ 624,998 $ 606,505 $ 799,855 $ 606,505  
Offtake termination (in shares) | shares                     3,453,237    
Offtake termination                     $ 4,796    
Share-based compensation (in shares) | shares             467,049 1,520,468 338,480 20,000 1,987,517 358,480  
Share-based compensation             $ 740 $ 2,558 $ 237 $ 52 $ 3,298 $ 289  
Issued on exercise of warrants (in shares) | shares             8,500,000 13,603,447     22,103,447    
Exercise of warrants             $ 6,432 $ 10,295     $ 16,727    
Ending balance (in shares) | shares             865,901,683 853,481,397 814,697,291 443,358,811 865,901,683 814,697,291  
Ending balance             $ 843,207 $ 831,239 $ 790,183 $ 624,998 $ 843,207 $ 790,183  
Issued from financing activities             4,796 18,531 164,948 18,441      
Additional Paid-In Capital                          
Increase (Decrease) in Stockholders' Equity [Roll Forward]                          
Beginning balance             29,923 30,583 18,983 18,977 30,583 18,977  
Share-based compensation             192 111 95 6      
Exercise of warrants             (482) (771)          
Ending balance             $ 29,633 $ 29,923 29,595 $ 18,983 29,633 $ 29,595  
Issued from financing activities   $ 10,500             $ 10,517        
Additional Paid-In Capital | Common Stock Warrants                          
Increase (Decrease) in Stockholders' Equity [Roll Forward]                          
Total gross proceeds                     $ 1,300    
2023 Convertible Debenture Redemption | Common Stock                          
Increase (Decrease) in Stockholders' Equity [Roll Forward]                          
Shares issued in private placement (in shares) | shares                     8,133,983    
Private placement                     $ 13,354    
Orion Convertible Loan Repayment | Common Stock                          
Increase (Decrease) in Stockholders' Equity [Roll Forward]                          
Shares issued in private placement (in shares) | shares                     2,993,307    
Private placement                     $ 5,177    
Private Placement                          
Increase (Decrease) in Stockholders' Equity [Roll Forward]                          
Common shares issued (in shares) | shares     1,000,000.0 1,000,000.0 28,200,000 28,200,000              
Public offering (in dollars per shares) | $ / shares       $ 0.80   $ 0.80              
Total gross proceeds     $ 600 $ 0.8 $ 15,600 $ 22.6              
Private Placement | Common Stock                          
Increase (Decrease) in Stockholders' Equity [Roll Forward]                          
Shares issued in private placement (in shares) | shares                       25,240,000  
Private placement                       $ 11,790  
Brokered Placement | Common Stock                          
Increase (Decrease) in Stockholders' Equity [Roll Forward]                          
Shares issued in private placement (in shares) | shares                       345,760,000  
Private placement                       $ 153,158  
Private Placement 2                          
Increase (Decrease) in Stockholders' Equity [Roll Forward]                          
Net proceeds from warrants issued   $ 162,500                      
Common shares issued (in shares) | shares   345,800,000                      
Public offering (in dollars per shares) | $ / shares   $ 0.50                      
Total gross proceeds   $ 172,900                      
Allocated to share capital based relative fair values   164,900                      
Private Placement 2 | Certain Directors And Officers                          
Increase (Decrease) in Stockholders' Equity [Roll Forward]                          
Net proceeds from warrants issued   $ 12,500                      
Common shares issued (in shares) | shares   25,200,000                      
Public offering (in dollars per shares) | $ / shares   $ 0.50                      
Total gross proceeds   $ 12,600                      
Number of share issued (in shares) | shares   1                      
Exercise price of warrants or rights (per share) | $ / shares   $ 0.70                      
Warrants issued (in shares) | shares   185,500,000                      
Private Placement 2 | Common Stock                          
Increase (Decrease) in Stockholders' Equity [Roll Forward]                          
Shares issued in private placement (in shares) | shares                       29,210,464  
Private placement                       $ 16,015  
ATM Program                          
Increase (Decrease) in Stockholders' Equity [Roll Forward]                          
Common shares issued (in shares) | shares                 4,300,000        
Total gross proceeds                 $ 2,500        
ATM Program | Common Stock                          
Increase (Decrease) in Stockholders' Equity [Roll Forward]                          
Shares issued in private placement (in shares) | shares                       4,341,390  
Private placement                       $ 2,426  
Offtake Termination                          
Increase (Decrease) in Stockholders' Equity [Roll Forward]                          
Delivered per arrangement | oz 40,000                        
Common shares issued (in shares) | shares 3,500,000                        
Total gross proceeds $ 4,800