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Note 10 - Inventories (Tables)
3 Months Ended
Aug. 26, 2012
Schedule of Inventory, Current [Table Text Block]
   
August 26, 2012
   
May 27, 2012
 
Finished goods
  $ 11,237     $ 9,406  
Raw materials
    9,160       9,876  
Work in progress
    3,146       2,729  
   Total
  $ 23,543     $ 22,011