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6. INVENTORIES (Tables)
9 Months Ended
Feb. 28, 2013
Inventories Tables  
Inventories

Inventories are comprised of the following (in thousands):

 

   February 28,  May 31,
   2013  2012
Raw materials and sub-assemblies  $2,843   $3,218 
Work in process   2,879    2,657 
Finished goods   —      195 
   $5,722   $6,070