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Inventory (Tables)
3 Months Ended
Aug. 31, 2012
Inventory [Abstract]  
INVENTORY
                 
    August 31, 2012     May 31, 2012  
    (unaudited)        

Raw materials

  $ 3,018     $ 3,529  

Work in progress

    1,035       937  

Finished goods

    21,929       20,520  
   

 

 

   

 

 

 

Total

  $ 25,982     $ 24,986