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Note 9 - Intangible Assets
 9 Months Ended
Sep. 30, 2018
Notes to Financial Statements  
Goodwill and Intangible Assets Disclosure [Text Block]
9.
Intangible Assets
 
Intangible assets as of
September 30, 2018
and
December 31, 2017
consisted of the following:
 
          September 30, 2018     December 31, 2017        
    Gross
Value		     Accumulated
Currency
Translation
Adjustment		     Accumulated
Amortization		     Net Book
Value		     Accumulated
Currency
Translation
Adjustment		     Accumulated
Amortization		     Net Book
Value		     Useful
Life		  
Developed technology   $
17,100
     $
(2,744
 )   $
(8,443
 )   $
5,913
     $
(2,550
 )   $
(7,723
 )   $
6,827
      
15
  
In-process research & development    
4,406
      
(1,122
 )    
-
      
3,284
      
(1,015
 )    
-
      
3,391
      
Indefinite
  
Distributor relationships    
4,700
      
(415
 )    
(4,285
 )    
-
      
(415
 )    
(4,285
 )    
-
      
5
  
Patents    
1,000
      
(164
 )    
(469
 )    
367
      
(152
 )    
(431
 )    
417
      
16
  
Elevess trade name    
1,000
      
-
      
(1,000
 )    
-
      
-
      
(1,000
 )    
-
      
9
  
Total   $
28,206
     $
(4,445
 )   $
(14,197
 )   $
9,564
     $
(4,132
 )   $
(13,439
 )   $
10,635
      
 
  
 
The aggregate amortization expense related to intangible assets was
$0.2
million for the
three
-month periods ended
September 30, 2018
and
2017.
The aggregate amortization expense related to intangible assets was
$0.8
million and
$0.7
million for the
nine
- month periods
September 30, 2018
and
2017,
respectively.