DEBT ISSUANCE COSTS (Details) (USD $)	3 Months Ended		9 Months Ended
	Feb. 28, 2015	Feb. 28, 2014	Feb. 28, 2015	Feb. 28, 2014
DEBT ISSUANCE COSTS DURING THE PERIOD:
Direct costs incurred in establishing debt agreement	$ 255,000
Amortization expense related to debt issuance costs	$ 26,000	$ 22,000	$ 149,000	$ 81,000