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Exploration and evaluation
 12 Months Ended
Dec. 31, 2021
Disclosure of Exploration and evaluation assets [Abstract]  
Exploration and evaluation [Text Block]

16. Exploration and evaluation

    2021     2020  
    $     $  
             
Net book value - January 1   42,519     42,949  
Additions   3,784     201  
Impairment   (42,668 )   -  
Transfer to royalty, stream and other interests   -     (631 )
Net book value - December 31   3,635     42,519  
             
Closing balance            
Cost   104,492     100,708  
Accumulated impairments   (100,857 )   (58,189 )
Net book value   3,635     42,519  

Impairment

In 2021, the Company incurred an impairment charge of $42.7 million ($34.6 million, net of income taxes) on exploration and evaluation properties, including the James Bay properties and the Coulon zinc project in Canada. The Company has determined that further exploration and evaluation expenditures are no longer planned in the near term on these properties and that the carrying amount of these assets is unlikely to be recovered from a sale of these properties at the current time. As a result, these properties were written down to zero on December 31, 2021.