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INVENTORIES (Tables)
3 Months Ended
Mar. 31, 2022
Inventory Disclosure [Abstract]  
Schedule of Inventory, Current
 March 31, 2022December 31, 2021
 Concentrates and work-in-progress$26,613 $27,619 
 Ore stockpiles241 351 
 Raw materials and consumables4,502 4,170 
 $31,356 $32,140 
Inventories
   Current$29,709 $30,772 
   Long term - raw materials and consumables1,647 1,368 
$31,356 $32,140