v3.25.4
Note 2 - Significant Accounting Policies (Tables)
12 Months Ended
Dec. 31, 2025
Notes Tables  
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block]
   

Year Ended

December 31,

 
                 
   

2025

   

2024

 
                 

Research and development

  $ 2,692     $ 1,127  

General and administrative

    930       626  

Total share-based compensation expense

  $ 3,622     $ 1,753  
Schedule of Share-Based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]
   

Year Ended

December 31,

 
    2025     2024  
                 

Weighted-average grant date fair value per share

  $ 2.68     $ 3.96  

Expected volatility

    79%-80 %     79%-83 %

Risk-free interest rate

    3.7%-4.5 %     3.6%-4.4 %

Expected life (in years)

    5.29–10.00       5.00–6.25  

Dividend yield

    -       -