STOCKHOLDERS' EQUITY (Details)	6 Months Ended
	Oct. 31, 2016 shares
Increase (Decrease) in Stockholders' Equity
Balance beginning of year (in shares)	5,615,750
Shares released from treasury for restricted stock grants	717,795
Newly issued shares for restricted stock grants	12,205
Shares reverted to treasury for restricted stock forfeitures	(350,000)
Balance end of year (in shares)	5,995,750