Stock-based compensation - Schedule of Share-based Compensation (Details) - USD ($) $ in Thousands |
3 Months Ended | 9 Months Ended |
|---|---|---|
Sep. 30, 2026 |
Sep. 30, 2026 |
|
| Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] | ||
| Share based compensation expense | $ 705 | $ 1,518 |
| Income Statement Location [Axis]: us-gaap:GeneralAndAdministrativeExpense | ||
| Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] | ||
| Share based compensation expense | 604 | 1,227 |
| Income Statement Location [Axis]: us-gaap:ResearchAndDevelopmentExpense | ||
| Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] | ||
| Share based compensation expense | $ 101 | $ 291 |