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     $ —