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

Share capital - Fair value of options (Details)

v3.20.1
Share capital - Fair value of options (Details) - Stock options
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Disclosure of classes of share capital [line items]    
Expected life of options   5 years
Annualized volatility 62.29% 60.00%
Dividend rate 0.00% 0.00%
Minimum    
Disclosure of classes of share capital [line items]    
Expected life of options 3 years  
Risk-free interest rate 1.25% 1.91%
Maximum    
Disclosure of classes of share capital [line items]    
Expected life of options 5 years  
Risk-free interest rate 1.58% 2.90%