EARNINGS PER SHARE (Details) - USD ($)	12 Months Ended
	Apr. 30, 2020	Apr. 30, 2019
EARNINGS PER SHARE
Net income	$ 714,000	$ 642,000
Amounts allocated to participating securities (nonvested restricted shares)	(87,000)	(78,000)
Net income attributable to common shareholders	$ 627,000	$ 564,000
Basic weighted average common shares	5,265,750	5,265,750
Earnings (loss) per share attributable to common shareholders:
Basic earnings per share	$ 0.12	$ 0.11