INCOME TAXES (Details) - USD ($)	3 Months Ended		6 Months Ended
	Oct. 31, 2019	Oct. 31, 2018	Oct. 31, 2019
INCOME TAXES
Income tax expense	$ 75,000	$ 15,000	$ 186,000
Effective Income Tax Rate, Percent	19.10%		19.90%
Expected change in the amount of unrecognized tax benefit, accrued interest or penalties within the next twelve months	$ 0		$ 0