6. STOCKHOLDERS' EQUITY (Tables)

12 Months Ended

Apr. 30, 2013

Equity [Abstract]

Shares Of Common Stock Authorized And Reserved For Future Issuance

	Number of Shares Reserved
Common shares reserved for issuance under outstanding option grants and common shares available for issuance under our stock incentive plans		20,081,954
Common shares reserved for and available for issuance under our Employee Stock Purchase Plan		3,438,559
Common shares issuable upon exercise of outstanding warrants		374,803
Total shares of common stock reserved for issuance		23,895,316