EARNINGS PER SHARE (Details) - USD ($)	12 Months Ended
	Apr. 30, 2019	Apr. 30, 2018
EARNINGS PER SHARE
Net income (loss)	$ 642,000	$ (2,015,000)
Amounts allocated to participating securities (nonvested restricted shares)	(78,000)
Net income (loss) attributable to common shareholders	$ 564,000	$ (2,015,000)
Basic weighted average common shares	5,265,750	5,265,750
Earnings (loss) per share attributable to common shareholders:
Basic earnings (loss) per share	$ 0.11	$ (0.38)