INTANGIBLE ASSETS, NET (Tables)

12 Months Ended

May 31, 2016

Disclosure Text Block [Abstract]

Schedule of Finite-Lived Intangible Assets [Table Text Block]

		2016		2015
Patents and licenses	$	509,485	$	505,849
Less accumulated amortization		(260,684)		(184,545)
	$	248,801	$	321,304

Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]

2017	$	73,418
2018		70,108
2019		64,149
2020		21,138
2021		12,181
Thereafter		7,807
Total	$	248,801