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Inventories (Tables)
 12 Months Ended
Dec. 31, 2021
Disclosure Of Inventories Explanatory [Abstract]  
Inventories
     
December 31,
 
2021
 
     
 
December 31,
 
2020
 
  
     
Ore stockpile
   
$
                                         26,411
 
    $                                          9,203  
     
Rough diamonds
   
 
44,255
        48,036  
     
Supplies inventory
   
 
39,166
        33,267  
     
Total
   
$
 109,832
 
    $ 90,506