Defined contribution and employee benefits (Details) - USD ($) $ in Millions |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Sep. 30, 2026 |
Sep. 30, 2025 |
Sep. 30, 2026 |
Sep. 30, 2025 |
|
| Retirement Benefits [Abstract] | ||||
| Percent of employer match | 25.00% | |||
| Percent of employee's gross pay | 4.00% | |||
| Employer contribution amount | $ 0.3 | $ 0.6 | $ 0.9 | $ 1.5 |