INCOME TAXES (Details) - Income Tax Rate Reconciliation - USD ($)	12 Months Ended
	May 31, 2016	May 31, 2015
Income Tax Rate Reconciliation [Abstract]
Computed "expected" tax benefit	$ 274,479	$ 226,024
Increase (reduction) in income taxes resulting from:
Change in valuation allowance	(1,038,000)
State income taxes, net of federal benefit	34,276	27,000
Research and development tax credits	21,844	63,000
Permanent tax differences and other	3,601	(1,000)
Income tax (expense) (benefit)	$ (703,800)	$ 315,024