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Segmented Information - Summary of Reportable Segments and Corporate Assets (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Jan. 01, 2023
 [1]
Disclosure Of Operating Segments [Line Items]        
Property, plant and equipment $ 8,988 $ 9,245 [1]   $ 9,026
Exploration and evaluation assets 343,794 343,092 [1]   348,645
Total assets 1,131,223 1,055,026 [1]   1,016,548
Total liabilities (240,293) (226,095) [1]   $ (232,546)
Income from discontinued operations 0 1,270,788 $ (61,041)  
Income/ (loss) from continuing operations (15,240) 17,581 (32,527)  
Net Income/(loss) (15,240) 1,288,369 (93,568)  
Exploration expenditures (10,078) (21,214) $ (4,733)  
Operating Segments        
Disclosure Of Operating Segments [Line Items]        
Property, plant and equipment 8,988 9,245    
Exploration and evaluation assets 343,794 343,092    
Total assets 1,131,223 1,055,026    
Total liabilities (240,293) (226,095)    
Property, plant and equipment additions 971 5,348    
Income from discontinued operations   1,270,788    
Income/ (loss) from continuing operations (15,240) 17,581    
Exploration expenditures (10,078) (21,214)    
Interest expense (25,176) (22,702)    
Operating Segments | Thacker Pass        
Disclosure Of Operating Segments [Line Items]        
Property, plant and equipment   0    
Exploration and evaluation assets   0    
Total assets   0    
Total liabilities   0    
Property, plant and equipment additions   0    
Income from discontinued operations   1,256,294    
Income/ (loss) from continuing operations   0    
Exploration expenditures   0    
Interest expense   0    
Operating Segments | Cauchari-Olaroz        
Disclosure Of Operating Segments [Line Items]        
Property, plant and equipment 0 0    
Exploration and evaluation assets 0 0    
Total assets 421,270 387,844    
Total liabilities 0 0    
Property, plant and equipment additions 0 0    
Income from discontinued operations   0    
Income/ (loss) from continuing operations (28,232) 16,211    
Exploration expenditures 0 0    
Interest expense 0 0    
Operating Segments | Pastos Grandes        
Disclosure Of Operating Segments [Line Items]        
Property, plant and equipment 8,584 8,372    
Exploration and evaluation assets 343,779 343,078    
Total assets 614,286 536,364    
Total liabilities (575) (1,858)    
Property, plant and equipment additions 764 4,789    
Income from discontinued operations   0    
Income/ (loss) from continuing operations 4,614 (7,399)    
Exploration expenditures (9,819) (20,623)    
Interest expense 0 0    
Operating Segments | Corporate        
Disclosure Of Operating Segments [Line Items]        
Property, plant and equipment 404 873    
Exploration and evaluation assets 15 14    
Total assets 95,667 130,818    
Total liabilities (239,718) (224,237)    
Property, plant and equipment additions 207 559    
Income from discontinued operations   14,494    
Income/ (loss) from continuing operations 8,378 8,769    
Exploration expenditures (259) (591)    
Interest expense $ (25,176) $ (22,702)    
[1] The comparative information has been reclassified as discussed in Note 13 and Note 14.