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Note 4 - Property and Equipment (Tables)
 12 Months Ended
Dec. 31, 2017
Notes Tables  
Property, Plant and Equipment [Table Text Block]
   
201
7
    
201
6
  
Land and land improvement
s
   $
14,318
     $
14,118
  
Buildings and improvement
s
    
34,721
      
33,533
  
Machinery and equipmen
t
    
9,151
      
9,015
  
Vehicle
s
    
467
      
445
  
Office furniture and fixture
s
    
6,301
      
5,963
  
Construction in progres
s
    
294
      
479
  
     
65,252
      
63,553
  
Less accumulated depreciation and amortizatio
n
    
(22,037
 )    
(19,582
 )
Property and equipment, ne
t
   $
43,215
     $
43,971