Significant Accounting Policies - Schedule of Common Stock Equivalents (Details) - shares	3 Months Ended
	Jul. 31, 2016	Jul. 31, 2015
Common stock equivalent shares	2,635,515	877,399
Stock Purchase Warrants [Member]
Common stock equivalent shares	133,333	336,458
Stock Options [Member]
Common stock equivalent shares	2,502,182	540,941