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15. SEGMENT INFORMATION (Tables)
9 Months Ended
Feb. 28, 2021
Segment Reporting [Abstract]  
Property and equipment by geographic region

    Property and equipment information is based on the physical location of the assets. The following table presents property and equipment information for geographic areas (in thousands):

 

   February 28,  May 31,
   2021  2020
United States  $612   $662 
Asia   5    1 
Europe   —      —   
   $617   $663