Organization, Use of Estimates and Basis of Presentation (Details)	6 Months Ended
	Oct. 31, 2013	Oct. 31, 2012
Common stock equivalents	18,750,622	16,060,622
Employee Stock Option [Member]
Common stock equivalents	15,473,955	14,643,955
Warrant [Member]
Common stock equivalents	3,276,667	1,416,667