Stock-based compensation - Expense (Details) - USD ($) $ in Thousands |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2025 |
Jun. 30, 2024 |
Jun. 30, 2025 |
Jun. 30, 2024 |
|
| Stock-based compensation | ||||
| Total stock-based compensation | $ 1,598 | $ 1,449 | $ 3,070 | $ 2,208 |
| Stock options | ||||
| Stock-based compensation | ||||
| Total stock-based compensation | 1,316 | 1,138 | 2,539 | 1,587 |
| Restricted Stock Units | ||||
| Stock-based compensation | ||||
| Total stock-based compensation | 282 | 311 | 531 | 621 |
| General and administrative | ||||
| Stock-based compensation | ||||
| Total stock-based compensation | 1,366 | 1,181 | 2,614 | 1,694 |
| Research and development | ||||
| Stock-based compensation | ||||
| Total stock-based compensation | $ 232 | $ 268 | $ 456 | $ 514 |