13. OTHER (EXPENSE) INCOME, NET (Details) - USD ($) $ in Thousands	12 Months Ended
	May 31, 2017	May 31, 2016	May 31, 2015
Other Expense Income Net Details
Foreign exchange (loss) gain	$ (21)	$ (19)	$ 194
Other, net	0	3	17
Other (expense) income, net	$ (21)	$ (16)	$ 211