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 |