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Note 6 - Property and Equipment (Tables)
 9 Months Ended
Sep. 30, 2019
Notes Tables  
Property, Plant and Equipment [Table Text Block]
   
September 30,
    
December 31,
  
   
2019
    
2018
  
Land and land improvements
   $
14,612
     $
14,231
  
Buildings and improvements
    
42,413
      
36,185
  
Machinery and equipment
    
4,869
      
4,508
  
Office furniture and fixtures
    
6,964
      
6,458
  
Vehicles
    
499
      
455
  
Construction in progress
    
2,084
      
2,569
  
     
71,441
      
64,406
  
Less accumulated depreciation and amortization
    
(23,222
 )    
(21,872
 )
Property and equipment, net
   $
48,219
     $
42,534