GEOGRAPHICAL INFORMATION - REVENUE (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Nov. 30, 2016	Nov. 30, 2015	Nov. 30, 2016	Nov. 30, 2015
Revenue: {1}
North America	$ 369	$ 1,043	$ 1,030	$ 1,818
Europe	268	274	540	482
Asia	0	3	0	6
Eliminations	0	(16)	0	(21)
Consolidated Total	$ 637	$ 1,304	$ 1,570	$ 2,285