RIGHT-OF-USE ASSETS AND LEASE LIABILITIES (Details) - USD ($)	3 Months Ended		9 Months Ended
	Jan. 31, 2022	Jan. 31, 2021	Jan. 31, 2022	Jan. 31, 2021
Disclosure Text Block [Abstract]
Operating Lease, Expense	$ 500,000	$ 500,000	$ 1,500,000	$ 1,500,000
Operating Lease, Weighted Average Remaining Lease Term	6 years 6 months		6 years 6 months
Operating Lease, Weighted Average Discount Rate, Percent	6.15%		6.15%