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Note 7 - Intangible Assets (Tables)
 12 Months Ended
Dec. 31, 2017
Notes Tables  
Schedule of Intangible Assets and Goodwill [Table Text Block]
   
Gross Carryin
g
    
Accumulate
d
    
Intangibl
e
  
   
Amoun
t
    
Amortizatio
n
    
Assets, Ne
t
  
As of December 31, 201
7
  
 
 
 
  
 
 
 
  
 
 
 
Customer relationship
s
   $
1,378
     $
(551
 )   $
827
  
Patent
s
    
1,162
      
(929
 )    
233
  
Trade names and trademark
s
    
1,132
      
(302
 )    
830
  
Other (1
)
    
176
      
(163
 )    
13
  
Tota
l
   $
3,848
     $
(1,945
 )   $
1,903
  
                         
As of December 31, 201
6
  
 
 
 
  
 
 
 
  
 
 
 
Customer relationship
s
   $
1,378
     $
(413
 )   $
965
  
Patent
s
    
1,162
      
(697
 )    
465
  
Trade names and trademark
s
    
1,132
      
(226
 )    
906
  
Other (1
)
    
295
      
(233
 )    
62
  
Tota
l
   $
3,967
     $
(1,569
 )   $
2,398
  
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]
Year ending December 31
,
  
 
 
 
201
8
   $
459
  
201
9
    
213
  
202
0
    
213
  
202
1
    
213
  
202
2
    
213
  
Thereafte
r
    
592
  
    $
1,903