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INTANGIBLE ASSETS, net
 12 Months Ended
May. 31, 2015
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: 

 

2015

 

2014

 

 

 

 

 

 

Patents and licenses

$

505,849

 

$

491,670

Less accumulated amortization

 

(184,545)

 

 

(109,489)

Intangible Assets, Net 

$

321,304

 

$

382,181


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

2016

$

74,892

2017

 

74,892

2018

 

69,045

2019

 

62,861

2020

 

19,624

Thereafter

 

19,990

Total

$

321,304