INTANGIBLE ASSETS, NET

12 Months Ended

May 31, 2016

Disclosure Text Block [Abstract]

Intangible Assets Disclosure [Text Block]

3.    INTANGIBLE ASSETS, NET

Intangible assets, net of accumulated amortization, consist of the following at May 31:

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

Expected amortization of intangible assets for the years ending May 31:

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