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Note 10 - Property, Plant and Equipment (Tables)
3 Months Ended
Mar. 31, 2019
Notes Tables  
Property, Plant and Equipment [Table Text Block]
   
March 31,
   
December 31,
 
   
2019
   
2018
 
   
(Unaudited)
   
 
 
 
Land and land improvements
  $
219
    $
219
 
Buildings and building improvements
   
11,257
     
11,178
 
Machinery, equipment, furniture and fixtures
   
60,199
     
59,179
 
Construction in progress
   
2,025
     
2,141
 
     
73,700
     
72,717
 
Accumulated depreciation
   
(58,942
)    
(58,062
)
    $
14,758
    $
14,655