EARNINGS PER SHARE (Details) - USD ($)	3 Months Ended		9 Months Ended
	Jan. 31, 2016	Jan. 31, 2015	Jan. 31, 2016	Jan. 31, 2015
EARNINGS PER SHARE
Net earnings (loss)	$ 101,000	$ 28,000	$ 396,000	$ (8,000)
Amounts allocated to participating securities (nonvested restricted shares)	(6,000)	(2,000)	(25,000)
Net income attributable to common shareholders	$ 95,000	$ 26,000	$ 371,000	$ (8,000)
Basic weighted average common shares	5,265,750	5,265,750	5,265,750	5,265,750
Earnings per share attributable to common shareholders:
Basic earnings per share	$ 0.02	$ 0.00	$ 0.07	$ 0.00