3. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details Narrative 2)	3 Months Ended		6 Months Ended
	Oct. 31, 2012	Oct. 31, 2011	Oct. 31, 2012	Oct. 31, 2011
Options ESPP Warrants
Shares which would have dilutive effect if the entity had not been in a loss position	4,824,231	19,929	3,472,288	48,867
Options and Warrants
Antidilutive shares excluded from calculation of weighted average diluted shares outstanding	4,884,707	6,146,976	5,728,569	5,789,399