Goodwill and intangible assets - Narrative (Details) - USD ($) $ in Millions |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
Jun. 30, 2026 |
Jun. 30, 2025 |
|
| Intangible Asset, Goodwill and Other [Abstract] | ||||
| Amortization expense for definite-lived intangible assets | $ 0.4 | $ 0.3 | $ 0.7 | $ 0.7 |