7. INCOME TAXES (Details 1) - USD ($) $ in Thousands	12 Months Ended
	May. 31, 2015	May. 31, 2014	May. 31, 2013
Federal income taxes:
Current	$ 0	$ 0	$ 0
Deferred	0	0	0
State income taxes:
Current	(19)	(30)	(21)
Deferred	0	0	0
Foreign income taxes:
Current	(15)	45	(9)
Deferred	0	0	0
Income tax benefit (expense)	$ (34)	$ 15	$ (30)