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Note 9 - Intangible Assets (Tables)
 9 Months Ended
Sep. 30, 2017
Notes Tables  
Schedule of Finite-Lived and Indefinite-Lived Intangible Assets by Major Class [Table Text Block]
            September 30, 2017   December 31, 2016
    Gross Value   Useful Life   Accumulated
Currency
Translation
Adjustment		   Accumulated
Amortization		   Net Book
Value		   Net Book
Value
Developed technology   $
17,100
      
15
     $
(2,644
 )   $
(7,487
 )   $
6,969
     $
6,842
  
In-process research & development    
4,406
      
Indefinite
      
(1,061
 )    
-
      
3,345
      
2,973
  
Distributor relationships    
4,700
      
5
      
(415
 )    
(4,285
 )    
-
      
-
  
Patents    
1,000
      
16
      
(158
 )    
(418
 )    
424
      
412
  
Elevess trade name    
1,000
      
9
      
-
      
(1,000
 )    
-
      
-
  
Total   $
28,206
      
 
     $
(4,278
 )   $
(13,190
 )   $
10,738
     $
10,227