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INTANGIBLE ASSETS, net (Details) - Intangible assets, net - USD ($)
May. 31, 2015
May. 31, 2014
Intangible assets, net [Abstract]    
Patents and licenses $ 505,849 $ 491,670
Less accumulated amortization (184,545) (109,489)
Intangible Assets, Net $ 321,304 $ 382,181