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Note 15 - Accumulated Other Comprehensive Loss
 3 Months Ended
Mar. 31, 2019
Notes to Financial Statements  
Comprehensive Income (Loss) Note [Text Block]
15
. ACCUMULA
TED OTHER COMPREHENSIVE LOSS
 
The following table summarizes the changes in accumulated other comprehensive loss (in thousands):
 
   
Unrealized Losses
on Available-for-
Sale Securities
    
Foreign Currency Translation
Adjustments
    
Total
  
Balance as of January 1, 2019
   $
(1,638
 )   $
(3,905
 )   $
(5,543
 )
Other comprehensive income before reclassifications
    
924
      
3,677
      
4,601
  
Tax effect
    
(98
 )    
-
      
(98
 )
Net current period other comprehensive income
    
826
      
3,677
      
4,503
  
Balance as of March 31, 2019
   $
(812
 )   $
(228
 )   $
(1,040
 )