Note 7 - Stockholders' Equity- Stock-based Compensation Expense (Details) - USD ($) $ in Thousands |
12 Months Ended | |
|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
|
| Stock-based compensation | $ 665 | $ 1,236 |
| Research and Development Expense [Member] | ||
| Stock-based compensation | 124 | 269 |
| General and Administrative Expense [Member] | ||
| Stock-based compensation | $ 541 | $ 967 |
| 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
|