INTERIM CONSOLIDATED STATEMENT OF CHANGES IN STOCKHOLDERS EQUITY (Unaudited) - 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, 2018	$ 5,931	$ 0	$ 75,170,181	$ (63,701,685)	$ (3,233,241)	$ 8,241,186
Beginning Balance (Shares) at Apr. 30, 2018	5,930,468	0
Stock-based compensation			267,412			267,412
Employee share purchase program	$ 2		5,321			5,323
Employee share purchase program (Shares)	2,172
Exercise of stock options	$ 7		(2,386)			$ (2,379)
Exercise of stock options (Shares)	6,958					35,500
Net loss for the period			(1,010,947)			$ (1,010,947)
Foreign currency translation adjustment					(202,965)	(202,965)
Ending Balance at Jul. 31, 2018	$ 5,940	$ 0	75,440,528	(64,578,599)	(3,436,206)	7,431,663
Ending Balance (Shares) at Jul. 31, 2018	5,939,598	0
Adoption of ASC 606				134,033		134,033
Beginning Balance at Apr. 30, 2019	$ 5,950		75,667,533	(68,581,091)	(3,866,495)	3,225,897
Beginning Balance (Shares) at Apr. 30, 2019	5,950,246
Stock-based compensation			68,341			68,341
Employee share purchase program	$ 3		5,260			$ 5,263
Employee share purchase program (Shares)	3,134
Exercise of stock options (Shares)						0
Net loss for the period				(929,723)		$ (929,723)
Foreign currency translation adjustment					302,543	302,543
Ending Balance at Jul. 31, 2019	$ 5,953		$ 75,741,134	$ (69,510,814)	$ (3,563,952)	$ 2,672,321
Ending Balance (Shares) at Jul. 31, 2019	5,953,380