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Key management (Tables)
12 Months Ended
Dec. 31, 2021
Disclosure Of Information About Key Management [Abstract]  
Disclosure of compensation, key management [Table Text Block]
    2021     2020  
    $     $  
             
Salaries and short-term employee benefits   5,369     5,776  
Share-based compensation   6,775     6,665  
Cost recoveries from associates   (144 )   (300 )
    12,000     12,141