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8. INVENTORIES
6 Months Ended
Nov. 30, 2018
Inventory Disclosure [Abstract]  
8. INVENTORIES

8. INVENTORIES

 

Inventories are comprised of the following (in thousands):

 

    November 30,     May 31,  
    2018     2018  
Raw materials and sub-assemblies   $ 6,613     $ 5,747  
Work in process     3,119       3,068  
Finished goods     251       234  
    $ 9,983     $ 9,049