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Note 11 - Property, Plant and Equipment (Tables)
3 Months Ended
Apr. 01, 2018
Notes Tables  
Property, Plant and Equipment [Table Text Block]
   
April 1,
   
December 31,
 
   
2018
   
2017
 
   
(Unaudited)
   
 
 
 
                 
Land and land improvements
  $
219
    $
219
 
Buildings and building improvements
   
11,367
     
11,140
 
Machinery, equipment, furniture and fixtures
   
51,858
     
49,726
 
Construction in progress
   
1,209
     
998
 
     
64,653
     
62,083
 
                 
Accumulated depreciation
   
(48,947
)    
(46,509
)
    $
15,706
    $
15,574