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15. SEGMENT INFORMATION (Details) - USD ($)
$ in Thousands
Feb. 28, 2021
May 31, 2020
Property and equipment, net $ 617 $ 663 [1]
United States    
Property and equipment, net 612 662
Asia    
Property and equipment, net 5 1
Europe    
Property and equipment, net $ 0 $ 0
[1] The condensed consolidated balance sheet at May 31, 2020 has been derived from the audited consolidated financial statements at that date.