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Organization, Use of Estimates and Basis of Presentation (Details)
9 Months Ended
Jan. 31, 2014
Jan. 31, 2013
Common stock equivalents 25,910,622 18,370,622
Employee Stock Option [Member]
   
Common stock equivalents 22,633,955 15,018,955
Warrant [Member]
   
Common stock equivalents 3,276,667 3,276,667
Restricted Stock [Member]
   
Common stock equivalents 0 75,000