CONSOLIDATED STATEMENT OF CHANGES IN STOCKHOLDERS' EQUITY - 3 months ended Jul. 31, 2015 - USD ($)	Common shares [Member]	Treasury Shares [Member]	Additional Paid-in Capital [Member]	Accumulated Deficit [Member]	Accumulated Other Comprehensive Loss[Member]	Total
Beginning Balance at Apr. 30, 2015	$ 42,334	$ (12)	$ 67,599,913	$ (55,330,905)	$ (2,392,172)	$ 9,919,158
Beginning Balance (Shares) at Apr. 30, 2015	42,333,945	(12,000)
Share repurchase plan		$ (24)	(12,608)			(12,632)
Share repurchase plan (Shares)		(23,500)
Cancellation of shares	$ (24)	$ 24	(5,264)			(5,264)
Cancellation of shares (Shares)	(24,000)	24,000
Stock-based compensation			361,522			361,522
Employee share purchase program	$ 65		36,313			36,378
Employee share purchase program (Shares)	65,124
Net loss for the period				(1,111,105)		(1,111,105)
Foreign currency translation adjustment					(999,994)	(999,994)
Ending Balance at Jul. 31, 2015	$ 42,375	$ (12)	$ 67,979,876	$ (56,442,010)	$ (3,392,166)	$ 8,188,063
Ending Balance (Shares) at Jul. 31, 2015	42,375,069	(11,500)