Annual and transition report of foreign private issuers pursuant to Section 13 or 15(d)

Share capital - Fair value of options (Details)

v3.21.1
Share capital - Fair value of options (Details) - Stock options
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Disclosure of classes of share capital [line items]    
Annualized volatility 62.29% 62.29%
Dividend rate 0.00% 0.00%
Minimum    
Disclosure of classes of share capital [line items]    
Expected life of options 3 years 3 years
Risk-free interest rate 0.29% 1.25%
Maximum    
Disclosure of classes of share capital [line items]    
Expected life of options 5 years 5 years
Risk-free interest rate 0.42% 1.58%