Stock-Based Compensation - Stock based compensation expense (Details) - USD ($) $ in Thousands |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
Jun. 30, 2026 |
Jun. 30, 2025 |
|
| Stock based compensation expense | ||||
| Total stock-based compensation expense | $ 304 | $ 587 | $ 648 | $ 1,951 |
| Location, Statement of Income, Balance [Axis]: us-gaap:GeneralAndAdministrativeExpense | ||||
| Stock based compensation expense | ||||
| Total stock-based compensation expense | 192 | 302 | 412 | 1,086 |
| Location, Statement of Income, Balance [Axis]: us-gaap:ResearchAndDevelopmentExpense | ||||
| Stock based compensation expense | ||||
| Total stock-based compensation expense | $ 112 | $ 285 | $ 236 | $ 865 |