COMMITMENTS AND CONTINGENCIES (Details) - USD ($)	3 Months Ended	6 Months Ended
	Oct. 31, 2020	Oct. 31, 2020	Apr. 30, 2020	Oct. 31, 2019
Commitments and Contingencies Disclosure [Abstract]
POM maximum per tax return		$ 10,000
Standard guarantee accrual amount	$ 9,700,000	9,700,000	$ 9,400,000	$ 7,600,000
Contingent business acquisition obligations	16,300,000	16,300,000	$ 14,200,000	$ 5,800,000
Lines of credit, total obligation	17,700,000	17,700,000
Remaining franchise equity lines of credit-undrawn commitment	12,200,000	$ 12,200,000
Social security subsidy received	$ 14,600,000