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Share capital (Tables)
12 Months Ended
Dec. 31, 2019
Disclosure of classes of share capital [abstract]  
Summary of Share Capital
Voting common shares
Number of Shares

 
Total

As at December 31, 2018 and 2017
158,801,722

 
$
3,007,924

Shares issued upon exercise of share options, for cash
56,644

 
265

Estimated fair value of share options exercised transferred from contributed surplus

 
103

Shares issued to the public
6,104,958

 
48,041

Share issuance cost

 
(1,770
)
As at December 31, 2019
164,963,324

 
$
3,054,563