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Net loss per share
 12 Months Ended
Dec. 31, 2019
Disclosure Of Earnings Per Share [Abstract]  
Net loss per share [Text Block]

27. Net loss per share

      2019     2018  
      $     $  
               
Net loss   (234,195 )   (105,587 )
             
Basic weighted average number of common shares outstanding (in thousands)   151,266     156,617  
  Dilutive effect of share options   -     -  
  Diluted weighted average number of common shares   151,266     156,617  
               
Net loss per share            
  Basic and diluted   (1.55 )   (0.67 )

As a result of the net loss for the years ended December 31, 2019 and 2018, all potentially dilutive common shares are deemed to be antidilutive and thus diluted net loss per share is equal to the basic net loss per share.