Commitments and Contingencies - Lease commitments and operating lease cost (Details) - USD ($) $ in Millions |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2025 |
Jun. 30, 2024 |
Jun. 30, 2025 |
Jun. 30, 2024 |
|
| Commitments and Contingencies | ||||
| Operating lease cost | $ 0.9 | $ 0.9 | $ 1.8 | $ 1.8 |