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Note 6 - Property and Equipment (Tables)
 12 Months Ended
Dec. 31, 2019
Notes Tables  
Property, Plant and Equipment [Table Text Block]
   
2019
    
2018
  
Land and land improvements
   $
14,823
     $
14,231
  
Buildings and improvements
    
44,596
      
36,185
  
Machinery and equipment
    
5,005
      
4,508
  
Vehicles
    
499
      
455
  
Office furniture and fixtures
    
7,234
      
6,458
  
Construction in progress
    
581
      
2,569
  
     
72,738
      
64,406
  
Less accumulated depreciation and amortization
    
(23,760
 )    
(21,872
 )
Property and equipment, net
   $
48,978
     $
42,534