v3.25.1
Note 4 - Marketable Securities (Tables)
3 Months Ended
Mar. 31, 2025
Notes Tables  
Fair Value, Marketable Securities Measured on a Recurring Basis [Table Text Block]
    Fair Value Measurements Using Inputs Considered as of:  
   

March 31, 2025

   

December 31, 2024

 
   

Total

   

Level 1

   

Level 2

   

Level 3

   

Total

   

Level 1

   

Level 2

   

Level 3

 

Commercial paper and corporate bonds

  $ 25,816     $     $ 25,816     $     $ 28,291     $     $ 28,291     $  

Government securities

    8,915             8,915             12,831             12,831        

Total

  $ 34,731     $     $ 34,731     $     $ 41,122     $     $ 41,122     $