Income Taxes - Unrecognized tax benefits (Details) - USD ($) $ in Thousands |
6 Months Ended | 12 Months Ended | |
|---|---|---|---|
Jun. 30, 2026 |
Dec. 31, 2025 |
Dec. 31, 2024 |
|
| Unrecognized Tax Benefits [Roll Forward] | |||
| Balance at the beginning of the year | $ 8,719 | $ 6,911 | $ 5,016 |
| Increases (decreases) related to prior year tax positions | 1,658 | (2) | (4) |
| Increase related to current year tax positions | 3,097 | 1,810 | 1,899 |
| Balance at the end of the year | $ 13,474 | $ 8,719 | $ 6,911 |