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3. INVENTORIES
12 Months Ended
May 31, 2016
Inventory Disclosure [Abstract]  
INVENTORIES

3. INVENTORIES:

 

     Inventories comprise (in thousands):

  

May 31,

   2016  2015
Raw materials and sub-assemblies  $2,839   $4,018 
Work in process   4,151    2,584 
Finished goods   43    521 
   $7,033   $7,123