Schedule of Revenue by Major Customers by Reporting Segments (Details)	6 Months Ended
	Oct. 31, 2013
Segmented Information Schedule Of Revenue By Major Customers By Reporting Segments 1	8.00%
Segmented Information Schedule Of Revenue By Major Customers By Reporting Segments 2	10.00%
Segmented Information Schedule Of Revenue By Major Customers By Reporting Segments 3	9.00%
Segmented Information Schedule Of Revenue By Major Customers By Reporting Segments 4	8.00%
Segmented Information Schedule Of Revenue By Major Customers By Reporting Segments 5	7.00%
Segmented Information Schedule Of Revenue By Major Customers By Reporting Segments 6	1.00%
Segmented Information Schedule Of Revenue By Major Customers By Reporting Segments 7	4.00%
Segmented Information Schedule Of Revenue By Major Customers By Reporting Segments 8	9.00%
Segmented Information Schedule Of Revenue By Major Customers By Reporting Segments 9	15.00%
Segmented Information Schedule Of Revenue By Major Customers By Reporting Segments 10	11.00%
Segmented Information Schedule Of Revenue By Major Customers By Reporting Segments 11	13.00%
Segmented Information Schedule Of Revenue By Major Customers By Reporting Segments 12	17.00%