SHAREHOLDERS' EQUITY (Details) - Non-vested Stock Options Activity - $ / shares	12 Months Ended
	May 31, 2016	May 31, 2015
Non-vested Stock Options Activity [Abstract]
Nonvested shares at May 31,2015		527,125
Nonvested shares at May 31,2015		$ 0.75
Granted	345,000
Granted	$ 1.17	$ 0.82
Vested/Issued	(179,250)
Vested/Issued	$ 0.66
Forfeited	(19,625)
Forfeited	$ 0.77
Nonvested shares at May 31,2016	673,250
Nonvested shares at May 31,2016	$ 0.99