XML 67 R11.htm IDEA: XBRL DOCUMENT v3.19.3.a.u2
Note 3 - Marketable Securities
 12 Months Ended
Dec. 31, 2019
Notes to Financial Statements  
Cash, Cash Equivalents, and Marketable Securities [Text Block]
NOTE
3:
MARKETABLE SECURITIES
 
The following is a summary of available-for-sale marketable securities at
December 
31,
2018
and
2019:
 
   
As at December 31,
2019
  
   
Amortized

cost
    
Gross
unrealized

gains
    
Gross
unrealized

losses
    
Fair

value
  
Available-for-sale - matures within one year:
  
 
 
 
  
 
 
 
  
 
 
 
  
 
 
 
Corporate bonds
   $
18,224
     $
16
     $
(11
 )   $
18,229
  
     
18,224
      
16
      
(11
 )    
18,229
  
Available-for-sale - matures after one year through
five
years:
  
 
 
 
  
 
 
 
  
 
 
 
  
 
 
 
Corporate bonds
    
46,593
      
168
      
(123
 )    
46,638
  
     
46,593
      
168
      
(123
 )    
46,638
  
                                 
Total
   $
64,817
     $
184
     $
(134
 )   $
64,867
  
 
 
   
As at December 31,
2018
  
   
Amortized

cost
    
Gross
unrealized

gains
    
Gross
unrealized

losses
    
Fair

value
  
Available-for-sale - matures within one year:
  
 
 
 
  
 
 
 
  
 
 
 
  
 
 
 
Corporate bonds
   $
6,094
     $
—
     $
(32
 )   $
6,062
  
     
6,094
      
—
      
(32
 )    
6,062
  
Available-for-sale - matures after one year through
five
years:
  
 
 
 
  
 
 
 
  
 
 
 
  
 
 
 
Certificate of deposits
    
747
      
—
      
—
      
747
  
Government bonds
    
501
      
—
      
(5
 )    
496
  
Corporate bonds
    
71,350
      
134
      
(1,320
 )    
70,164
  
     
72,598
      
134
      
(1,325
 )    
71,407
  
                                 
Total
   $
78,692
     $
134
     $
(1,357
 )   $
77,469
  
 
The following table presents gross unrealized losses and fair values for those investments that were in an unrealized loss position as of
December 31, 2018
and
2019,
and the length of time that those investments have been in a continuous loss position:
 
   
Less than 12 months
    
12 months or greater
  
   
Fair Value
    
Gross
unrealized
loss
    
Fair Value
    
Gross
unrealized
loss
  
As of December 31, 2019
   $
22,852
     $
(102
 )   $
14,231
     $
(32
 )
As of December 31, 2018
   $
16,580
     $
(192
 )   $
52,590
     $
(1,165
 )
 
As of
December 
31,
2018
and
2019,
management believes the impairments are
not
other than temporary and therefore the unrealized losses were recorded in accumulated other comprehensive income (loss).
 
The following table presents gross realized gains and losses from sale of available-for-sale marketable securities:
 
   
Year ended December 31,
  
   
2017
    
201
8
    
201
9
  
                         
Gross realized gains from sale of available-for-sale marketable securities
   $
47
     $
4
     $
13
  
Gross realized losses from sale of available-for-sale marketable securities
   $
(47
 )   $
(71
 )   $
(41
 )