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Note 7 - Property, Plant, and Equipment (Tables)
12 Months Ended
Dec. 31, 2018
Notes Tables  
Property, Plant and Equipment [Table Text Block]
    December 31,
    2018   2017
Land and improvements   $
3,191
    $
3,191
 
Buildings and improvements    
35,187
     
28,939
 
Leasehold improvements    
2,843
     
2,553
 
Machinery & Equipment    
62,441
     
58,602
 
Furniture, fixtures, computers & software    
7,119
     
6,820
 
Construction in progress    
999
     
6,611
 
 
 
$
111,780
 
 
$
106,716