EARNINGS PER SHARE (Details) - USD ($)	3 Months Ended		9 Months Ended
	Jan. 31, 2019	Jan. 31, 2018	Jan. 31, 2019	Jan. 31, 2018
EARNINGS PER SHARE
Net loss	$ (406,000)	$ (307,000)	$ (417,000)	$ (671,000)
Net loss attributable to common shareholders	$ (406,000)	$ (307,000)	$ (417,000)	$ (671,000)
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	$ (0.08)	$ (0.06)	$ (0.08)	$ (0.13)