Quarterly report pursuant to Section 13 or 15(d)

Note 4 - Marketable Securities

v3.21.1
Note 4 - Marketable Securities
3 Months Ended
Mar. 31, 2021
Notes to Financial Statements  
Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block]
4.
Marketable Securities
 
The available-for-sale marketable securities are primarily comprised of investments in commercial paper, corporate bonds and government securities and consist of the following, measured at fair value on a recurring basis (in thousands):
 
   
Fair Value Measurements Using Inputs Considered as of:
 
   
March 31, 2021
   
December 31, 2020
 
   
Total
   
Level
1
   
Level 2
   
Level
3
   
Total
   
Level 1
   
Level 2
   
Level 3
 
Government securities
  $
6,004
    $
    $
6,004
    $
    $
8,924
    $
    $
8,924
    $
 
Bank certificates of deposit
   
245
     
     
245
     
     
496
     
     
496
     
 
Commercial paper and corporate bonds
   
13,823
     
     
13,823
     
     
10,678
     
     
10,678
     
 
Total
  $
20,072
    $
    $
20,072
    $
    $
20,098
    $
    $
20,098
    $
 
 
Accrued interest receivable on available-for-sale securities is included in amounts receivable and was
$37,000
and
$34,000
as of
March 31, 2021
and
December 31, 2020,
respectively.
 
There were
no
transfers of assets between Level
1
and Level
2
of the fair value measurement hierarchy during the
three
months ended
March 31, 2021.
 
Under the terms of the Company's investment policy, purchases of marketable securities are limited to investment grade governmental and corporate obligations and bank certificates of deposit with a primary objective of principal preservation. Maturities of individual securities are less than
one
year and the amortized cost of all securities approximated fair value as of
March 31, 2021
and
December 31, 2020.