v3.21.1
Shareholders' equity - Share-based compensation - Recognized share-based compensation expense (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Share-based compensation    
Share-based compensation expense $ 1,368 $ 981
General and Administration    
Share-based compensation    
Share-based compensation expense 573 399
Research and development    
Share-based compensation    
Share-based compensation expense 580 386
Commercial activities    
Share-based compensation    
Share-based compensation expense $ 215 $ 196