Stockholders' Equity - Summary of Stock Options Activity (Details) (USD $)	3 Months Ended
	Jul. 31, 2013
Stockholders' Equity Note [Abstract]
Options, Outstanding at beginning of period	2,368,000
Options, Outstanding at end of period	2,638,000
Options, Exercisable at end of period	659,500
Weighted Average Exercise Price, Outstanding at beginning of period	$ 0.15
Weighted Average Exercise Price, Outstanding at end of period	$ 0.15
Weighted Average Exercise Price, Exercisable at end of period	$ 0.15
Weighted average fair value of options granted	$ 0.17