13. SEGMENT INFORMATION (Details Narrative) - USD ($) $ in Thousands	3 Months Ended
	Aug. 31, 2019	Aug. 31, 2018	May 31, 2019	[1]
Operating lease right-of-use assets	$ 2,533		$ 0
Five Largest Customers
Customers accounted for 10% or more of total revenues	93.00%	78.00%
Customer A
Customers accounted for 10% or more of total revenues	54.00%	21.00%
Customer B
Customers accounted for 10% or more of total revenues	22.00%	18.00%
Customer C
Customers accounted for 10% or more of total revenues		17.00%
Customer D
Customers accounted for 10% or more of total revenues		14.00%

[1] The condensed consolidated balance sheet at May 31, 2019 has been derived from the audited consolidated financial statements at that date.