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Note 10 - 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 land improvements
  $
219
    $
219
 
Buildings and building improvements
   
11,178
     
11,140
 
Machinery, equipment, furniture and fixtures
   
59,179
     
54,554
 
Construction in progress
   
2,141
     
998
 
     
72,717
     
66,911
 
Accumulated depreciation
   
(58,062
)    
(51,337
)
    $
14,655
    $
15,574
 
   
December 31,
 
   
2018
   
2017
 
Buildings and building improvements
  $
2,995
    $
2,987
 
Machinery, equipment, furniture and fixtures
   
1,277
     
1,277
 
     
4,272
     
4,264
 
Accumulated depreciation
   
(976
)    
(548
)
    $
3,296
    $
3,716