Schedule of Revenue by Major Customers by Reporting Segments (Details)	6 Months Ended
Oct. 31, 2016
Segmented Information Schedule Of Revenue By Major Customers By Reporting Segments 1	10.00%
Segmented Information Schedule Of Revenue By Major Customers By Reporting Segments 2	0.00%
Segmented Information Schedule Of Revenue By Major Customers By Reporting Segments 3	5.00%
Segmented Information Schedule Of Revenue By Major Customers By Reporting Segments 4	0.00%

Segmented Information Schedule Of Revenue By Major Customers By Reporting Segments 4

No definition available.

Name:	cpah_ScheduleOfRevenueByMajorCustomersByReportingSegmentsZeroThreeFourZeroFiveThreeEightNineSixFFiveqDTqJbFourNJSeven
Namespace Prefix:	cpah_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration