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Loss per share (Tables)
12 Months Ended
Dec. 31, 2020
Earnings per share [abstract]  
Schedule of anti-dilutive securities
The outstanding number and type of securities that could potentially dilute basic net income per share in the future but would have decreased the loss per share (anti-dilutive) as at December 31, 2020 and 2019 are as follows:

20202019
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Share options1,516,641 1,692,347 
DSUs44,142 36,250 
1,560,783 1,728,597