Note 7 - Stockholders' Equity- Stock-based Compensation Expense (Details) - USD ($) $ in Thousands |
3 Months Ended | |
|---|---|---|
Mar. 31, 2026 |
Mar. 31, 2025 |
|
| Stock-based compensation | $ 61 | $ 185 |
| Research and Development [Member] | ||
| Stock-based compensation | 14 | 40 |
| General and Administrative [Member] | ||
| Stock-based compensation | $ 47 | $ 145 |
| X | ||||||||||
- Definition Amount of expense for award under share-based payment arrangement. Excludes amount capitalized. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
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