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Note 6 - Fixed Assets (Tables)
 12 Months Ended
Dec. 31, 2017
Notes Tables  
Property, Plant and Equipment [Table Text Block]
   
2017
    
2016
  
Machinery and equipment
   $
2,516
     $
1,493
  
Leasehold improvements
    
1,734
      
1,640
  
Computer equipment
    
714
      
695
  
Furniture and fixtures
    
874
      
877
  
Construction in progress
    
-
      
893
  
Property and equipment, gross
    
5,838
      
5,598
  
Less - accumulated depreciation
    
(1,716
 )    
(838
 )
Property and equipment, net
  
$
4,122
   
$
4,760