Summary of Significant Accounting Policies (Details 2)	12 Months Ended
	Apr. 30, 2013	Apr. 30, 2012
Total common stock equivalents.	17,216,872	16,307,705
Employee Stock Option [Member]
Total common stock equivalents.	13,890,205	14,866,038
Warrant [Member]
Total common stock equivalents.	3,276,667	1,416,667
Restricted Stock [Member]
Total common stock equivalents.	50,000	25,000