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6. INVENTORIES
3 Months Ended
Aug. 31, 2017
Inventory Disclosure [Abstract]  
6. INVENTORIES

6. INVENTORIES

 

    Inventories are comprised of the following (in thousands):

 

    August 31,     May 31,  
    2017     2017  
Raw materials and sub-assemblies   $ 5,928     $ 4,268  
Work in process     2,639       2,059  
Finished goods     453       277  
    $ 9,020     $ 6,604