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INTANGIBLE ASSETS, net (Tables)
 12 Months Ended
May. 31, 2015
Disclosure Text Block [Abstract]  
Schedule of Finite-Lived Intangible Assets [Table Text Block]

 

2015

 

2014

 

 

 

 

 

 

Patents and licenses

$

505,849

 

$

491,670

Less accumulated amortization

 

(184,545)

 

 

(109,489)

Intangible Assets, Net 

$

321,304

 

$

382,181

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

2016

$

74,892

2017

 

74,892

2018

 

69,045

2019

 

62,861

2020

 

19,624

Thereafter

 

19,990

Total

$

321,304