GEOGRAPHICAL INFORMATION - REVENUE (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Feb. 29, 2016	Feb. 28, 2015	Feb. 29, 2016	Feb. 28, 2015
Revenues:
North America	$ 746	$ 809	$ 2,564	$ 2,350
Europe	193	146	675	512
Asia	3		9
Eliminations	(30)	(30)	(51)	(46)
Consolidated Total	$ 912	$ 925	$ 3,197	$ 2,816