PROMISSORY NOTES (Details Narrative) - USD ($)	3 Months Ended		6 Months Ended		12 Months Ended
	Oct. 31, 2020	Oct. 31, 2019	Oct. 31, 2020	Oct. 31, 2019	Apr. 30, 2020
Accretion Expense		$ 34,810		$ 60,348
Third Promissory Notes [Member]
Interest Rate	12.00%		12.00%
Interest Terms			Interest is payable semi-annually as calculated on May 31st and November 30th of each year. Interest is to be paid either in cash, in common shares or deemed an advance of principal at the option of the Lender. A 5% late payment penalty may apply if payment is not paid within ten days after the due date.	Interest is payable semi-annually as calculated on May 31st and November 30th of each year. Interest is to be paid either in cash, in common shares or deemed an advance of principal at the option of the Lender. A 5% late payment penalty may apply if payment is not paid within ten days after the due date.
Interest Recorded			$ 1,492,264	$ 1,327,764
Debt Conversion			During the six months ended October 31, 2020, the Lender elected to have interest payable from December 1, 2019 to May 31, 2020 of $1,413,443 deemed as advances.
Fifth Promissory Notes [Member]
Promissory Notes Description			On September 11, 2018, the Company entered into a Loan Agreement with the Lender pursuant to which up to $2,500,000 will be advanced to the Company in tranches (the “Fifth Promissory Notes”). As at October 31, 2020, the Company had received $2,500,000 (April 30, 2020 - $2,500,000) in advances pursuant to the Fifth Promissory Notes.
Promissory Notes Advances	$ 2,500,000		$ 2,500,000		$ 2,500,000
Interest Rate	14.00%		14.00%		14.00%
Interest Terms			Interest is payable semi-annually as calculated on May 31st and November 30th of each year. Interest is to be paid either in cash, in common shares or deemed an advance of principal at the option of the Lender. A 5% late payment penalty may apply if payment is not paid within ten days after the due date.	Interest is payable semi-annually as calculated on May 31st and November 30th of each year. Interest is to be paid either in cash, in common shares or deemed an advance of principal at the option of the Lender. A 5% late payment penalty may apply if payment is not paid within ten days after the due date.
Interest Recorded			$ 208,684	$ 160,947
Debt Conversion			During the six months ended October 31, 2020, the Lender elected to have interest payable from December 1, 2019 to May 31, 2020 of $196,104 deemed as advances.
Sixth Promissory Notes [Member]
Promissory Notes Description			On October 25, 2019, the Company entered into a Loan Agreement with the Lender pursuant to which up to $700,000 will be advanced to the Company in tranches (the “Sixth Promissory Notes”). On January 20, 2020 and July 8, 2020, the Company entered into amending agreements whereby the Lender agreed to advance an additional $600,000 and $1,200,000, respectively, under the same terms as the Sixth Promissory Notes.
Interest Terms			Interest is payable semi-annually as calculated on May 31st and November 30th of each year. Interest is to be paid either in cash, in common shares or deemed an advance of principal at the option of the Lender. A 5% late payment penalty may apply if payment is not paid within ten days after the due date.		Interest is payable semi-annually as calculated on May 31st and November 30th of each year. Interest is to be paid either in cash, in common shares or deemed an advance of principal at the option of the Lender. A 5% late payment penalty may apply if payment is not paid within ten days after the due date.
Interest Recorded			$ 550,000		$ 1,300,000
Debt Conversion			During the six months ended October 31, 2020, the Lender elected to have interest payable from December 1, 2019 to May 31, 2020 of $65,170 deemed as advances.