Fair Value Measurements (Common Stock Warrant Liabilities) (Details) - USD ($) $ in Thousands |
3 Months Ended | 12 Months Ended |
|---|---|---|
Mar. 31, 2026 |
Dec. 31, 2025 |
|
| Fair Value Measurements | ||
| Common Stock Warrant liabilities at beginning of period | $ 1 | |
| Common Stock Warrant liabilities at end of period | 0 | $ 1 |
| Common Stock Warrant | ||
| Fair Value Measurements | ||
| Common Stock Warrant liabilities at beginning of period | 1 | 214 |
| Common Stock Warrant liabilities at end of period | 1 | |
| Checkpoint | Common Stock Warrant | ||
| Fair Value Measurements | ||
| Change in fair value of common stock warrants | 108 | |
| Deconsolidation of common stock warrants | (306) | |
| Avenue | Common Stock Warrant | ||
| Fair Value Measurements | ||
| Change in fair value of common stock warrants | $ (1) | $ (15) |