Schedule of Stockholders Equity Deferred Share Unit Plan (Details) (USD $)	6 Months Ended
	Oct. 31, 2013
Common Stock Schedule Of Stockholders Equity Deferred Share Unit Plan 1	$ 1,643,119
Common Stock Schedule Of Stockholders Equity Deferred Share Unit Plan 2	1.02
Common Stock Schedule Of Stockholders Equity Deferred Share Unit Plan 3	191,066
Common Stock Schedule Of Stockholders Equity Deferred Share Unit Plan 4	1.90
Common Stock Schedule Of Stockholders Equity Deferred Share Unit Plan 5	(73,334)
Common Stock Schedule Of Stockholders Equity Deferred Share Unit Plan 6	1.00
Common Stock Schedule Of Stockholders Equity Deferred Share Unit Plan 7	1,760,851
Common Stock Schedule Of Stockholders Equity Deferred Share Unit Plan 8	$ 1.10