INCOME TAXES (Details) - USD ($)	3 Months Ended
	Jul. 31, 2020	Jul. 31, 2019	Apr. 30, 2020
INCOME TAXES
Effective Income Tax Rate, Percent	26.50%	19.90%
Expected change in the amount of unrecognized tax benefit, accrued interest or penalties within the next twelve months	$ 0
Total income tax provision (benefit)	(128,000)	$ 111,000
Releease in valuation allowance	288,000
Valuation allowance	$ 301,000		$ 589,000