v3.26.1
Investment in Sal De La Puna Joint Venture- Summary of Amounts Presented in Financial Statements of Joint Venture (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Disclosure of detailed information about business combination [line items]      
Current assets $ 84,712 $ 117,409  
Non-current assets (including PPA adjustments) 1,015,068 1,013,814  
Current liabilities (280,955) (240,272)  
LAR's share of Sal de la Puna's net assets 183,370 183,207  
EXPENSES      
Exploration and evaluation expenditures 6,689 10,078 $ 21,214
General and administrative 15,712 14,654 21,401
Total expenses 77,478 60,369 36,346
Net loss 76,880 15,240 (1,288,369)
Sal de la Puna Holdings S.a.r.l.      
Disclosure of detailed information about business combination [line items]      
Current assets 1,562 1,589  
Non-current assets (including PPA adjustments) 280,551 280,470  
Current liabilities (6) (202)  
Net assets 282,107 281,857  
LAR's share of Sal de la Puna's net assets 183,370 183,207  
EXPENSES      
Exploration and evaluation expenditures 72 479 1,772
General and administrative 518 522 231
Total expenses 590 1,001 2,003
Foreign exchange and other (income)/loss (198) (730) 762
Net loss $ 392 $ 271 $ 2,765