Quarterly report pursuant to Section 13 or 15(d)

Note 4 - Marketable Securities (Tables)

v3.21.2
Note 4 - Marketable Securities (Tables)
9 Months Ended
Sep. 30, 2021
Notes Tables  
Fair Value, Marketable Securities Measured on a Recurring Basis [Table Text Block]
   

Fair Value Measurements Using Inputs Considered as of:

 
   

September 30, 2021

   

December 31, 2020

 
   

Total

   

Level 1

   

Level 2

   

Level 3

   

Total

   

Level 1

   

Level 2

   

Level 3

 

Government securities

  $ 8,270     $     $ 8,270     $     $ 8,924     $     $ 8,924     $  

Bank certificates of deposit

                            496             496        

Commercial paper and corporate bonds

    23,608             23,608             10,678             10,678        

Total

  $ 31,878     $     $ 31,878     $     $ 20,098     $     $ 20,098     $