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Other financial assets
12 Months Ended
Dec. 31, 2019
Other Financial Assets [Abstract]  
Other financial assets [Text Block]

10. Other financial assets

    Dec. 31, 2019     Dec. 31, 2018  
Current            
Derivative assets $ 1,712   $ 6,628  
Restricted cash   337     3,738  
    2,049     10,366  
             
Non-current            
Investments at fair value through profit or loss   11,287     15,159  
  $ 13,336   $ 25,525  

Investments at fair value through profit or loss consist of securities in Canadian metals and mining companies, all of which are publicly traded. The change in investments at fair value through profit or loss is mostly attributed to fluctuations in market price and foreign exchange impact.