EARNINGS PER SHARE (Details) - USD ($)	3 Months Ended
	Jul. 31, 2019	Jul. 31, 2018
EARNINGS PER SHARE
Net income (loss)	$ 444,000	$ (43,000)
Amounts allocated to participating securities (nonvested restricted shares)	(54,000)
Net income (loss) attributable to common shareholders	$ 390,000	$ (43,000)
Basic weighted average common shares	5,265,750	5,265,750
Earnings (loss) per share attributable to common shareholders:
Basic earnings (loss) per share	$ 0.07	$ (0.01)