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Note 4 - Inventories (Tables)
 9 Months Ended
Nov. 26, 2017
Notes Tables  
Schedule of Inventory, Current [Table Text Block]
   
November 26,
    
February 26,
  
   
2017
    
2017
  
                 
Inventories:
  
 
 
 
  
 
 
 
                 
Raw materials
   $
6,157
     $
5,842
  
Work-in-process
    
2,424
      
2,329
  
Finished goods
    
2,579
      
2,585
  
Manufacturing supplies
    
289
      
349
  
   
$
11,449
   
$
11,105