10-Q Defined contribution plans (Details) - USD ($) $ in Millions |
3 Months Ended | 12 Months Ended | |||
|---|---|---|---|---|---|
Mar. 31, 2026 |
Mar. 31, 2025 |
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|
| Retirement Benefits [Abstract] | |||||
| Percent of employer match | 25.00% | 25.00% | |||
| Percent of employee's gross pay | 4.00% | 4.00% | |||
| Employer contribution amount | $ 0.1 | $ 0.3 | $ 2.1 | $ 1.0 | $ 0.8 |