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Note 18 - Accumulated Other Comprehensive Income (Loss) (Tables)
 12 Months Ended
Dec. 31, 2016
Notes Tables  
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]
 
 
Unrealized Losses
on Available-for-
Sale Securities
 
 
Foreign Currency
Translation
Adjustments
 
 
Total
 
Balance as of January 1, 2015
   $
(196
 )   $
6,007
    $
5,811
 
Other comprehensive loss before reclassifications
    
(174
 )    
(4,166
 )    
(4,340
 )
Amounts reclassified from accumulated other comprehensive income
    
(5
 )    
-
     
(5
 )
Net current period other comprehensive loss
    
(179
 )    
(4,166
 )    
(4,345
 )
Balance as of December 31, 2015
    
(375
 )    
1,841
     
1,466
 
Other comprehensive loss before reclassifications
    
(623
 )    
(5,033
 )    
(5,656
 )
Amounts reclassified from accumulated other comprehensive income (loss)
    
(25
 )    
-
     
(25
 )
Net current period other comprehensive loss
    
(648
 )    
(5,033
 )    
(5,681
 )
Balance as of December 31, 2016
   $
(1,023
 )   $
(3,192
 )   $
(4,215
 )