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Note 4 - Property and Equipment (Tables)
 12 Months Ended
May 28, 2017
Notes Tables  
Property, Plant and Equipment [Table Text Block]
   
Years of
    
Year
Ended
  
   
Useful Life
    
May 28, 2017
    
May 29, 2016
  
Land and buildings
  
 15
-
40
     $
86,983
     $
67,192
  
Leasehold improvements
  
 3
-
20
      
1,190
      
1,620
  
Computers, capitalized software, machinery, equipment and autos
  
 3
-
20
      
97,375
      
87,464
  
Furniture and fixtures
  
 3
-
7
      
1,272
      
901
  
Construction in process
  
 
 
 
      
6,811
      
17,677
  
Gross property and equipment
  
 
 
 
      
193,631
      
174,854
  
Less accumulated depreciation and amortization
  
 
 
 
      
(60,411
)
    
(53,974
)
Net property and equipment
  
 
 
 
     $
133,220
     $
120,880