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SEGMENTED INFORMATION (Details 2) - USD ($)
$ in Thousands
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Disclosure Of Operating Segments      
Exploration and evaluation assets - Mexico $ 9,692 $ 9,034 $ 7,979
Exploration and evaluation assets - Canada 37,089 34,304 22,813
Total exploration and evaluation assets $ 46,781 $ 43,338 $ 30,792