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Intangible Assets (Details) - USD ($)
12 Months Ended
Apr. 30, 2016
Apr. 30, 2015
Less: Accumulated amortization $ (140,745) $ (20,293)
Less: impairment of intangible assets (2,082,941) 0
Intangible assets, net $ 0 2,203,393
Estimated useful life 15 years  
Patents [Member]    
Finite lived intangible assets, gross $ 2,223,686 $ 2,223,686