7. STOCKHOLDERS EQUITY (Narrative) (USD $)	6 Months Ended
	Oct. 31, 2013	Oct. 31, 2012
Equity [Abstract]
Gross proceeds from stock issuance	$ 24,277,000
Shares issued	15,938,269
Stock issuance costs	722,000	620,000
Aggregate gross proceeds remain available	$ 37,351,000