FOREIGN CURRENCY TRANSLATION (Details) - USD ($)	3 Months Ended		6 Months Ended
	Nov. 30, 2016	Nov. 30, 2015	Nov. 30, 2016	Nov. 30, 2015
FOREIGN CURRENCY TRANSLATION DETAILS
Net (gain) loss from foreign currency related transactions	$ 0	$ 23,000	$ 0	$ 16,000