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Note 6 - Inventories (Tables)
6 Months Ended
Nov. 29, 2015
Notes Tables  
Schedule of Inventory, Current [Table Text Block]
   
November 29, 
2015
   
May 31,
2015
 
Finished goods
  $ 14,188     $ 13,271  
Raw materials
    11,104       9,879  
Work in progress
    3,567       1,877  
Total
  $ 28,859     $ 25,027