401(k) SAVINGS PLAN (Details) $ in Thousands	12 Months Ended
	Apr. 30, 2016 USD ($) EntryDate	Apr. 30, 2015 USD ($)
401(k) SAVINGS PLAN [Abstract]
Number of days of service eligible to participate in the plan	30 days
Number of entry dates per calendar year to participate in plan | EntryDate	2
Employers matching contribution, as percent of every pretax dollar	100.00%
Maximum percentage of matching contribution	6.00%
Employee vested percentage in employer's contributions	100.00%
Employer matching share contribution | $	$ 241	$ 219