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Note 4 - Property and Equipment (Tables)
 9 Months Ended
Sep. 30, 2017
Notes Tables  
Property, Plant and Equipment [Table Text Block]
   
September 30,
    
December 31,
  
   
2017
    
2016
  
Land and land improvements
   $
14,179
     $
14,118
  
Buildings and improvements
    
34,234
      
33,533
  
Machinery and equipment
    
9,126
      
9,015
  
Vehicles
    
445
      
445
  
Office furniture and fixtures
    
6,309
      
5,963
  
Construction in progress
    
720
      
479
  
     
65,013
      
63,553
  
Less accumulated depreciation and amortization
    
(21,438
 )    
(19,582
 )
Property and equipment, net
   $
43,575
     $
43,971