STOCKHOLDERS' EQUITY (Details) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Apr. 30, 2013	Apr. 30, 2012	Apr. 30, 2011
STOCKHOLDERS' EQUITY [Abstract]
Shares issued for 401k plan (in shares)	1,476,259	713,302	437,814
Shares issued for marketing and consulting services (in shares)	238,750		193,750
Value of shares issued for 401k plan	$ 281	$ 278	$ 214
Value of shares issued for marketing and consulting services	$ 90		$ 78