Quarterly report pursuant to Section 13 or 15(d)

Note 4 - Marketable Securities (Tables)

v3.20.2
Note 4 - Marketable Securities (Tables)
6 Months Ended
Jun. 30, 2020
Notes Tables  
Fair Value, Marketable Securities Measured on a Recurring Basis [Table Text Block]
   
Fair Value Measurements Using Inputs Considered as of:
 
   
June 30, 2020
   
December 31, 2019
 
   
Total
   
Level 1
   
Level 2
   
Level 3
   
Total
   
Level 1
   
Level 2
   
Level 3
 
Government securities
  $
4,841
    $
—
    $
4,841
    $
—
    $
1,998
    $
—
    $
1,998
    $
—
 
Bank certificates of deposit
   
2,003
     
—
     
2,003
     
—
     
—
     
—
     
—
     
—
 
Commercial paper and corporate bonds
   
—
     
—
     
—
     
—
     
1,997
     
—
     
1,997
     
—
 
Total
  $
6,844
    $
—
    $
6,844
    $
—
    $
3,995
    $
—
    $
3,995
    $
—