INCOME TAXES (Details) - Deferred Income Tax Assets And Liabilities - USD ($)	Apr. 30, 2020	Apr. 30, 2019
Deferred income tax assets / (liabilities)
Operating losses carried forward	$ 10,061,000	$ 8,836,000
Resource property	698,000	581,000
Share issuance costs	36,000	63,000
Other	19,000	19,000
Valuation allowance	(10,814,000)	(9,499,000)
Net deferred income tax asset