v3.26.1
Note 2 - Significant Accounting Policies (Tables)
6 Months Ended
Jun. 30, 2026
Notes Tables  
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block]
   

Three Months Ended

   

Six Months Ended

 
   

June 30,

   

June 30,

 
   

2026

   

2025

   

2026

   

2025

 

Research and development

  $ 6     $ 19     $ 14     $ 2,680  

General and administrative

    166       88       330       756  

Total share-based compensation expense

  $ 172     $ 107     $ 344     $ 3,436  
Schedule of Share-Based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]
   

Three Months Ended

   

Six Months Ended

 
    June 30,    

June 30,

 
   

2026

   

2025

   

2026

   

2025

 

Dividend yield

    -       -       -       -  

Expected volatility

    81 %     -       81%-82 %     79%-80 %

Risk-free interest rate

    4.0 %     -       3.8%-4.0 %     4.1%-4.5 %

Expected life (in years)

    6.25       -       6.25       6.25 - 10  

Weighted-average grant date fair value per share

  $ 1.80     $ -     $ 1.78     $ 2.93