Intangible Assets (Tables)

3 Months Ended

Jul. 31, 2015

Goodwill and Intangible Assets Disclosure [Abstract]

Intangible assets

	Estimated useful life	July 31, 2015			April 30, 2015
Patent rights	15 years	$	2,223,686		$	2,223,686
Less: Accumulated amortization			(50,406	)		(20,293	)
Intangible assets, net		$	2,173,280		$	2,203,393

Future annual amortization expense

April 30,
2016 (remainder of year)	$	89,602
2017		119,469
2018		119,469
2019		119,469
2020		119,469
Thereafter		1,605,802
	$	2,173,280