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Note 6 - Intangible Assets (Tables)
 3 Months Ended
Mar. 31, 2020
Notes Tables  
Schedule of Finite-Lived and Indefinite-Lived Intangible Assets by Major Class [Table Text Block]
        Three months ended March 31, 2020
    Gross
Value		   Less: Accumulated
Currency Translation
Adjustment		   Less:
Current Period
Impairment Charge		   Less:
Accumulated
Amortization		   Net Book
Value		   Weighted
Average Useful
Life
Developed technology   $
93,953
     $
(2,986
 )   $
(318
 )   $
(9,958
 )   $
80,691
      
15
  
In-process research & development    
5,006
      
(1,296
 )    
-
      
-
      
3,710
      
Indefinite
  
Customer relationships    
9,000
      
-
      
-
      
(99
 )    
8,901
      
10
  
Distributor relationships    
4,700
      
(415
 )    
-
      
(4,285
 )    
-
      
5
  
Patents    
1,000
      
(182
 )    
-
      
(543
 )    
275
      
16
  
Tradenames    
5,200
      
-
      
-
      
(59
 )    
5,141
      
5
  
Total   $
118,859
     $
(4,879
 )   $
(318
 )   $
(14,944
 )   $
98,718
      
13
  
        December 31, 2019
    Gross
Value		   Less: Accumulated
Currency Translation
Adjustment		   Less:
Current Period
Impairment Charge		   Less:
Accumulated
Amortization		   Net Book
Value		   Weighted
Average Useful
Life
Developed technology   $
17,100
     $
(2,934
 )   $
(389
 )   $
(9,657
 )   $
4,120
      
15
  
In-process research & development    
4,406
      
(1,234
 )    
–
      
–
      
3,172
      
Indefinite
  
Distributor relationships    
4,700
      
(415
 )    
–
      
(4,285
 )    
–
      
5
  
Patents    
1,000
      
(176
 )    
–
      
(531
 )    
293
      
16
  
Elevess tradename    
1,000
      
–
      
–
      
(1,000
 )    
–
      
9
  
Total   $
28,206
     $
(4,759
 )   $
(389
 )   $
(15,473
 )   $
7,585
      
11