EARNINGS PER SHARE (Details) - USD ($)	3 Months Ended		6 Months Ended
	Oct. 31, 2018	Oct. 31, 2017	Oct. 31, 2018	Oct. 31, 2017
EARNINGS PER SHARE
Net earnings (loss)	$ 32,000	$ (171,000)	$ (11,000)	$ (364,000)
Amounts allocated to participating securities (nonvested restricted shares)	(2,000)
Net income (loss) attributable to common shareholders	$ 30,000	$ (171,000)	$ (11,000)	$ (364,000)
Basic weighted average common shares	5,265,750	5,265,750	5,265,750	5,265,750
Earnings (loss) per share attributable to common shareholders:
Basic earnings (loss) per share	$ 0.01	$ (0.03)	$ 0.00	$ (0.07)