Stock based awards - Stock-based compensation (Details) - USD ($) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2023 |
Dec. 31, 2022 |
Dec. 31, 2021 |
|
| Stock-based compensation | |||
| Total stock-based compensation expense | $ 21,497 | $ 23,243 | $ 10,054 |
| Research and development expense | |||
| Stock-based compensation | |||
| Total stock-based compensation expense | 7,579 | 8,096 | 3,054 |
| General and administrative expense | |||
| Stock-based compensation | |||
| Total stock-based compensation expense | $ 13,918 | $ 15,147 | $ 7,000 |