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Note 7 - Property and Equipment (Tables)
 3 Months Ended
Mar. 31, 2021
Notes Tables  
Property, Plant and Equipment [Table Text Block]
   
March 31,
    
December 31,
  
   
2021
    
2020
  
Land and land improvements
   $
15,156
     $
15,150
  
Buildings and improvements
    
47,084
      
47,026
  
Machinery and equipment
    
5,508
      
5,469
  
Office furniture and fixtures
    
8,097
      
8,000
  
Vehicles
    
661
      
677
  
Construction in progress
    
1,540
      
1,086
  
     
78,046
      
77,408
  
Less accumulated depreciation and amortization
    
(26,709
 )    
(26,109
 )
Property and equipment, net
   $
51,337
     $
51,299