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7. INVENTORIES
6 Months Ended
Nov. 30, 2019
Inventory Disclosure [Abstract]  
7. INVENTORIES

7. INVENTORIES

 

    Inventories are comprised of the following (in thousands):                                                                          

 

   November 30, 2019  May 31, 2019
Raw materials and sub-assemblies  $6,562   $5,471 
Work in process   3,053    3,580 
Finished goods   185    10 
   $9,800   $9,061