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Note 7 - Fair Value Measurements (Tables)
3 Months Ended
Mar. 31, 2020
Notes Tables  
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]
   
Total
   
Level 1
   
Level 2
   
Level 3
 
As of March 31, 2020
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Financial assets:
                               
Deferred compensation plan
  $
4,069
    $
3,409
    $
660
    $
-
 
Foreign currency forward contracts
   
259
     
-
     
259
     
-
 
Total financial assets
  $
4,328
    $
3,409
    $
919
    $
-
 
                                 
As of December 31, 2019
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Financial assets:
                               
Deferred compensation plan
  $
5,150
    $
4,268
    $
882
    $
-
 
                                 
Financial liabilities:
                               
Foreign currency forward contracts
  $
(138
)   $
-
    $
(138
)   $
-