Stockholders' Equity (Stock-based Compensation Expense) (Details) - USD ($) $ in Thousands |
3 Months Ended | |
|---|---|---|
Mar. 31, 2025 |
Mar. 31, 2024 |
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| Total stock-based compensation expense | $ 38 | $ 76 |
| General and administrative | ||
| Total stock-based compensation expense | 49 | 47 |
| Research and development | ||
| Total stock-based compensation expense | $ (11) | $ 29 |
| X | ||||||||||
- Definition Amount of noncash expense for share-based payment arrangement. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Details
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