XML 40 R28.htm IDEA: XBRL DOCUMENT v3.10.0.1
INTANGIBLE ASSETS, NET (Details) - Intangible assets, net - USD ($)
May 31, 2018
May 31, 2017
Intangible assets, net [Abstract]    
Patents and licenses $ 509,485 $ 509,485
Less accumulated amortization (410,562) (335,016)
Intangible Assets, Net $ 98,923 $ 174,469