Stock-based compensation - Deferred stock units (Details) - Deferred stock units $ / shares in Units, $ in Thousands |
6 Months Ended | |
|---|---|---|
|
Jun. 30, 2025
USD ($)
$ / shares
shares
|
Jun. 30, 2024
USD ($)
$ / shares
shares
|
|
| Number of shares | ||
| Vested and outstanding at beginning (in shares) | shares | 73,954 | 91,804 |
| Redeemed (in shares) | shares | (17,850) | |
| Vested and outstanding at end (in shares) | shares | 73,954 | 73,954 |
| Weighted average grant-date fair value | ||
| Vested and outstanding at beginning (in dollars per shares) | $ / shares | $ 9.72 | $ 9.73 |
| Redeemed (in dollars per share) | $ / shares | 9.78 | |
| Vested and outstanding at end (in dollars per shares) | $ / shares | $ 9.72 | $ 9.72 |
| Aggregate intrinsic value | ||
| Vested and outstanding at beginning (in dollars) | $ 1,515 | $ 1,225 |
| Redeemed (in dollars) | 224 | |
| Vested and outstanding at end (in dollars) | 1,376 | $ 1,109 |
| Unrecognized stock-based compensation expense | $ 0 | |