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15. SEGMENT INFORMATION (Tables)
6 Months Ended
Nov. 30, 2020
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):

 

   November 30,  May 31,
   2020  2020
United States  $682   $662 
Asia   1    1 
Europe   —      —   
   $683   $663