v3.26.1
Note 6 - Stockholders' Equity and Stock-based Compensation Expense (Tables)
6 Months Ended
Jun. 30, 2026
Notes Tables  
Share-Based Payment Arrangement, Activity [Table Text Block]
  

Stock Options

  

Performance Awards

 

Outstanding as of December 31, 2025

  4,157,094   7,142 

Options granted

  27,000    

Options exercised

      

Options forfeited/canceled

  (174,782)  (7,142)

Outstanding as of June 30, 2026

  4,009,312    
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

 $1,348  $1,162  $2,681  $3,534 

General and administrative

  2,723   3,420   5,459   6,272 

Total stock-based compensation expense

 $4,071  $4,582  $8,140  $9,806