15. SEGMENT INFORMATION (Details Narrative) - USD ($) $ in Thousands	3 Months Ended
	Aug. 31, 2020	Aug. 31, 2019	May 31, 2020	[1]
Operating lease right-of-use assets	$ 1,952		$ 2,107
Five Largest Customers
Customers accounted for 10% or more of total revenues	81.00%	93.00%
Customer A
Customers accounted for 10% or more of total revenues	21.00%	54.00%
Customer B
Customers accounted for 10% or more of total revenues	19.00%	22.00%
Customer C
Customers accounted for 10% or more of total revenues	17.00%
Customer D
Customers accounted for 10% or more of total revenues	15.00%

[1] The condensed consolidated balance sheet at May 31, 2020 has been derived from the audited consolidated financial statements at that date.