Schedule of Allocation of Share Based Compensation Costs for Deferred Share Units (Details) - USD ($)	3 Months Ended
	Jul. 31, 2019	Jul. 31, 2018
Deferred Compensation, Allocated Share-based Compensation Expense	$ 20,326	$ 188,682
Cost of sales [Member]
Deferred Compensation, Allocated Share-based Compensation Expense	1,175	0
Sales and marketing [Member]
Deferred Compensation, Allocated Share-based Compensation Expense	4,700	0
Research and development [Member]
Deferred Compensation, Allocated Share-based Compensation Expense	1,175	0
General and administrative [Member]
Deferred Compensation, Allocated Share-based Compensation Expense	$ 13,276	$ 188,682