Schedule of Stockholders Equity Non Vested Deferred Share Units (Details) (USD $)	6 Months Ended
	Oct. 31, 2013
Common Stock Schedule Of Stockholders Equity Non Vested Deferred Share Units 1	$ 207,444
Common Stock Schedule Of Stockholders Equity Non Vested Deferred Share Units 2	1.98
Common Stock Schedule Of Stockholders Equity Non Vested Deferred Share Units 3	191,066
Common Stock Schedule Of Stockholders Equity Non Vested Deferred Share Units 4	1.90
Common Stock Schedule Of Stockholders Equity Non Vested Deferred Share Units 5	(227,048)
Common Stock Schedule Of Stockholders Equity Non Vested Deferred Share Units 6	1.79
Common Stock Schedule Of Stockholders Equity Non Vested Deferred Share Units 7	171,462
Common Stock Schedule Of Stockholders Equity Non Vested Deferred Share Units 8	$ 2.19