Quarterly report pursuant to Section 13 or 15(d)

Note 4 - Marketable Securities (Tables)

v3.23.2
Note 4 - Marketable Securities (Tables)
6 Months Ended
Jun. 30, 2023
Notes Tables  
Fair Value, Marketable Securities Measured on a Recurring Basis [Table Text Block]
    Fair Value Measurements Using Inputs Considered as of:  
    June 30, 2023     December 31, 2022  
    Total     Level 1     Level 2     Level 3     Total     Level 1     Level 2     Level 3  

Commercial paper and corporate bonds

  $ 21,681     $     $ 21,681     $     $ 14,209     $     $ 14,209     $  

Government securities

    33,144             33,144             14,565             14,565        

Total

  $ 54,825     $     $ 54,825     $     $ 28,774     $     $ 28,774     $