SUMMARIZES OPTION ACTIVITY UNDER 2011 STOCK OPTION PLAN (Details) {Stockholders'Equity}	9 Months Ended
	Feb. 29, 2016 shares
Number of Options
Outstanding options	129,500
Granted	30,000
Exercised	0
Forfeited or expired	(12,500)
Outstanding options	147,000
Granted	2,500
Exercised	0
Outstanding options	149,500
Exercisable	131,598
Weighted Average Exercise Price Per Share
Outstanding options	1.88
Granted	1.84
Forfeited or expired	1.11
Outstanding options	1.77
Granted	1
Outstanding options	1.75
Exercisable	1.77
Weighted-Average Remaining Life (in years)
Outstanding options	9.74
Granted	10
Outstanding options	8.54
Granted	10
Forfeited or expired	0
Outstanding options	7.82
Exercisable	7.74
Aggregate Intrinsic Value
Outstanding options	20,825
Outstanding options	2,625
Outstanding options	4,975
Exercisable	4,722