Schedule of Revenue from External Customers Attributed to Foreign Countries by Geographic Area (Details)	6 Months Ended
	Oct. 31, 2017 USD ($)
Segmented Information Schedule Of Revenue From External Customers Attributed To Foreign Countries By Geographic Area 1	$ 1,755,522
Segmented Information Schedule Of Revenue From External Customers Attributed To Foreign Countries By Geographic Area 2	1,526,524
Segmented Information Schedule Of Revenue From External Customers Attributed To Foreign Countries By Geographic Area 3	3,509,598
Segmented Information Schedule Of Revenue From External Customers Attributed To Foreign Countries By Geographic Area 4	3,435,387
Segmented Information Schedule Of Revenue From External Customers Attributed To Foreign Countries By Geographic Area 5	1,239,538
Segmented Information Schedule Of Revenue From External Customers Attributed To Foreign Countries By Geographic Area 6	858,713
Segmented Information Schedule Of Revenue From External Customers Attributed To Foreign Countries By Geographic Area 7	2,183,667
Segmented Information Schedule Of Revenue From External Customers Attributed To Foreign Countries By Geographic Area 8	1,689,935
Segmented Information Schedule Of Revenue From External Customers Attributed To Foreign Countries By Geographic Area 9	223,512
Segmented Information Schedule Of Revenue From External Customers Attributed To Foreign Countries By Geographic Area 10	273,844
Segmented Information Schedule Of Revenue From External Customers Attributed To Foreign Countries By Geographic Area 11	521,895
Segmented Information Schedule Of Revenue From External Customers Attributed To Foreign Countries By Geographic Area 12	470,123
Segmented Information Schedule Of Revenue From External Customers Attributed To Foreign Countries By Geographic Area 13	191,993
Segmented Information Schedule Of Revenue From External Customers Attributed To Foreign Countries By Geographic Area 14	92,032
Segmented Information Schedule Of Revenue From External Customers Attributed To Foreign Countries By Geographic Area 15	308,211
Segmented Information Schedule Of Revenue From External Customers Attributed To Foreign Countries By Geographic Area 16	181,662
Segmented Information Schedule Of Revenue From External Customers Attributed To Foreign Countries By Geographic Area 17	3,410,565
Segmented Information Schedule Of Revenue From External Customers Attributed To Foreign Countries By Geographic Area 18	2,751,113
Segmented Information Schedule Of Revenue From External Customers Attributed To Foreign Countries By Geographic Area 19	6,523,371
Segmented Information Schedule Of Revenue From External Customers Attributed To Foreign Countries By Geographic Area 20	$ 5,777,107