INTERIM CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS EQUITY (USD $)	Common shares [Member] USD ($)	Treasury Shares [Member] USD ($)	Preferred shares [Member]	Additional Paid-in Capital [Member] USD ($)	Accumulated Deficit [Member] USD ($)	Accumulated Other Comprehensive Income [Member] USD ($)	Total USD ($)
Beginning Balance at Apr. 30, 2013	$ 41,959	$ (79)		$ 66,191,140	$ (44,974,491)	$ (330,920)	$ 20,927,609
Beginning Balance (Shares) at Apr. 30, 2013	41,958,350	(78,608)	1
Exercise of stock options	232			108,683			108,915
Exercise of stock options (Shares)	231,655
Share repurchase plan		(105)		105
Share repurchase plan (Shares)		(105,148)
Cancellation of shares	(159)	159		(162,737)			(162,737)
Cancellation of shares (Shares)	(158,936)	158,936
Conversion of deferred share units	49			(38,349)			(38,300)
Conversion of deferred share units (Shares)	49,868
Stock-based compensation				637,043			637,043
Cancellation of preferred share (Shares)			(1)
Net income (loss) for the period					(3,336,519)		(3,336,519)
Foreign currency translation adjustment						(284,227)	(284,227)
Ending Balance at Oct. 31, 2013	$ 42,081	$ (25)		$ 66,735,885	$ (48,311,010)	$ (615,147)	$ 17,851,784
Ending Balance (Shares) at Oct. 31, 2013	42,080,937	(24,820)