8. STOCKHOLDERS EQUITY (Details Narrative) (USD $)	6 Months Ended	3 Months Ended
Oct. 31, 2012	Oct. 31, 2011	Oct. 31, 2012 December 2010 AMI Agreement	Oct. 31, 2012 Two Shelf Registration Statements
Shares sold under registration statement			21,310,619
Gross proceeds of stock sold			$ 18,215,000
Commissions and other issuance costs	620,000	785,000	620,000
Aggregate gross proceeds available			$ 9,167,000	$ 159,167,000

The cash outflow for cost incurred directly with the issuance of an equity security.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Financing Activities

-URI http://asc.fasb.org/extlink&oid=6513228

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 95

-Paragraph 18, 19, 20

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 15

-URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3291-108585

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