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Mineral Properties (Tables)
12 Months Ended
Dec. 31, 2020
Extractive Industries [Abstract]  
Mineral property
(in thousands)   December 31,  
    2020     2019  
Exploration            
   Lik project (Alaska – US)   $ 15,611     $ 15,611  
   Gold Coin (Arizona – US)     17       -  
   La Promesa (Peru)     -       6  
     Total exploration mineral property   $ 15,628     $ 15,617  
Exploration expense
   

For the year ended

December 31,

 
(in thousands)   2020     2019  
Geologic and field expenses   $ 326     $ 1,726  
Administrative     87       81  
  Total exploration expense   $ 413     $ 1,807