Stock-Based Compensation - Stock based compensation expense (Details) - USD ($) $ in Thousands |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Sep. 30, 2026 |
Sep. 30, 2025 |
Sep. 30, 2026 |
Sep. 30, 2025 |
|
| Stock based compensation expense | ||||
| Total stock-based compensation expense | $ 196 | $ 600 | $ 844 | $ 2,551 |
| Location, Statement of Income, Balance [Axis]: us-gaap:GeneralAndAdministrativeExpense | ||||
| Stock based compensation expense | ||||
| Total stock-based compensation expense | 171 | 278 | 583 | 1,364 |
| Location, Statement of Income, Balance [Axis]: us-gaap:ResearchAndDevelopmentExpense | ||||
| Stock based compensation expense | ||||
| Total stock-based compensation expense | $ 25 | $ 322 | $ 261 | $ 1,187 |