STOCKHOLDERS' EQUITY (Details) - USD ($) $ in Thousands	12 Months Ended
	Apr. 30, 2015	Apr. 30, 2014	Apr. 30, 2013
STOCKHOLDERS' EQUITY [Abstract]
Shares issued for 401k plan (in shares)	1,367,006	1,873,919	1,476,259
Value of shares issued for 401k plan	$ 219	$ 244	$ 281
Shares issued for marketing and consulting services (in shares)	0	0	238,750
Value of shares issued for marketing and consulting services			$ 90