Summary of significant accounting policies (Details 1) - USD ($) $ in Thousands |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
Jun. 30, 2026 |
Jun. 30, 2025 |
|
| Accounting Policies [Abstract] | ||||
| Balance, beginning of period | $ 1,100 | $ 502 | ||
| Deferral of revenue | 2,721 | 263 | 5,661 | 263 |
| Recognition of revenue | (2,629) | (166) | (4,971) | (166) |
| Balance, end of period | $ 1,192 | $ 97 | $ 1,192 | $ 97 |