OTHER INCOME (Details) - USD ($)	3 Months Ended
	Jul. 31, 2021	Jul. 31, 2020
Other Nonoperating Income	$ 230,000	$ 650,000
Bankruptcy of a warranty provider
Other Nonoperating Income	185,000
Settlement Agreement
Other Nonoperating Income		$ 650,000
Forgiveness of Debt [Member]
Other Nonoperating Income	$ 45,000