CAPITALIZED PATENT COSTS AS FOLLOWS (Details) (USD $)	3 Months Ended		6 Months Ended
	Nov. 30, 2013	Nov. 30, 2012	Nov. 30, 2013	Nov. 30, 2012
CAPITALIZED PATENT COSTS AS FOLLOWS:
Capitalized patent costs totaled	$ 0	$ 0	$ 2,000	$ 6,000