Segmented Information (Tables)

9 Months Ended

Jan. 31, 2015

Schedule of Revenue from External Customers Attributed to Foreign Countries by Geographic Area [Table Text Block]

		Three Months Ended				Nine Months Ended
		January 31,				January 31,
		2015		2014		2015		2014
North America	$	1,684,132	$	1,815,963	$	5,802,361	$	5,590,535
Europe		799,724		437,754		1,718,869		1,148,888
Asia and Africa		456,116		184,082		1,102,566		688,585
Latin America		81,511		166,089		275,966		582,177
	$	3,021,483	$	2,603,888	$	8,899,762	$	8,010,185

Schedule of Long Lived Assets by Geographical Areas [Table Text Block]

		As at
		January 31, 2015		April 30, 2014
Canada	$	7,013,630	$	8,230,891
United States		218,748		44,816
	$	7,232,378	$	8,275,707