INVESTMENT ASSETS:- Additional Information (Details)	12 Months Ended
	Apr. 30, 2020 USD ($) a	Apr. 30, 2019 USD ($)
Area of Land	12,000
Lease Expiration Date	Dec. 31, 2029
Depreciation On Warehouse And Other Facilities | $	$ 517,000	$ 516,000
Florida
Area of Land	204,000