401(k) SAVINGS PLAN (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Apr. 30, 2014 EntryDate	Apr. 30, 2013	Apr. 30, 2012
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	2
Employers matching contribution, as percent of every pretax dollar (in hundredths)	100.00%
Maximum percentage of matching contribution (in hundredths)	6.00%
Employee vested percentage in employer's contributions (in hundredths)	100.00%
Employer matching share contribution	$ 244	$ 281	$ 278