Stockholders' Equity - Summary of Common Stock Warrants Activity (Details) (Warrant [Member], USD $)	Jul. 31, 2013	Apr. 30, 2013
Warrant [Member]
Warrants, Outstanding at beginning of period	3,730,150	3,730,150
Warrants, Outstanding at end of period	3,730,150	3,730,150
Warrants, Exercisable at end of period	3,692,650
Weighted Average Exercise Price, Outstanding at beginning of period	$ 0.18	$ 0.18
Weighted Average Exercise Price, Outstanding at end of period	$ 0.18	$ 0.18
Weighted Average Exercise Price, Exercisable at end of period	$ 0.18