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Note 7 - Goodwill (Tables)
 3 Months Ended
Mar. 31, 2020
Notes Tables  
Schedule of Goodwill [Table Text Block]
   
Three Months Ended
March 31, 2020
  
Twelve Months Ended
December 31, 2019
Balance, beginning   $
7,694
     $
7,851
  
Effect of foreign currency adjustments    
(148
 )    
(157
 )
Acquisitions    
44,400
      
-
  
Impairment loss    
(18,144
 )    
-
  
Balance, ending   $
33,802
     $
7,694