STOCKHOLDERS' EQUITY (Details) - USD ($) $ in Thousands	12 Months Ended
	Apr. 30, 2016	Apr. 30, 2015
STOCKHOLDERS' EQUITY [Abstract]
Shares issued for 401k plan (in shares)	1,206,775	1,367,006
Value of shares issued for 401k plan	$ 241	$ 219
Stock Issued During Period, Shares, Issued for Services	0	0
Value of shares issued for marketing and consulting services	$ 0	$ 0