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6. INVENTORIES
6 Months Ended
Nov. 30, 2015
Inventory Disclosure [Abstract]  
6. INVENTORIES

6.  INVENTORIES

 

    Inventories are comprised of the following (in thousands):

    November 30,     May 31,  
    2015     2015  
Raw materials and sub-assemblies   $ 3,570     $ 4,018  
Work in process     3,848       2,584  
Finished goods     1       521  
    $ 7,419     $ 7,123