Schedule of Stockholders Equity Non Vested Deferred Share Units (Details) (USD $)	12 Months Ended
	Apr. 30, 2014
Common Stock Schedule Of Stockholders Equity Non Vested Deferred Share Units 1	$ 334,337
Common Stock Schedule Of Stockholders Equity Non Vested Deferred Share Units 2	1.33
Common Stock Schedule Of Stockholders Equity Non Vested Deferred Share Units 3	133,443
Common Stock Schedule Of Stockholders Equity Non Vested Deferred Share Units 4	2.90
Common Stock Schedule Of Stockholders Equity Non Vested Deferred Share Units 5	(260,336)
Common Stock Schedule Of Stockholders Equity Non Vested Deferred Share Units 6	1.62
Common Stock Schedule Of Stockholders Equity Non Vested Deferred Share Units 7	207,444
Common Stock Schedule Of Stockholders Equity Non Vested Deferred Share Units 8	1.98
Common Stock Schedule Of Stockholders Equity Non Vested Deferred Share Units 9	191,066
Common Stock Schedule Of Stockholders Equity Non Vested Deferred Share Units 10	1.90
Common Stock Schedule Of Stockholders Equity Non Vested Deferred Share Units 11	(241,732)
Common Stock Schedule Of Stockholders Equity Non Vested Deferred Share Units 12	1.80
Common Stock Schedule Of Stockholders Equity Non Vested Deferred Share Units 13	156,778
Common Stock Schedule Of Stockholders Equity Non Vested Deferred Share Units 14	$ 2.16