Note 7 - Stockholders' Equity- Stock-based Compensation Expense (Details) - USD ($) $ in Thousands |
3 Months Ended | |
|---|---|---|
Mar. 31, 2025 |
Mar. 31, 2024 |
|
| Stock-based compensation | $ 185 | $ 191 |
| Research and Development Expense [Member] | ||
| Stock-based compensation | 40 | 45 |
| General and Administrative Expense [Member] | ||
| Stock-based compensation | $ 145 | $ 146 |
| 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
|