CONSOLIDATED STATEMENTS OF CASH FLOWS (Parenthetical) - USD ($)	3 Months Ended
Jul. 31, 2015	Jul. 31, 2014
Common Stock
Stock Issuance costs	$ 275,000	$ 14,000
Series E Preferred Stock [Member]
Stock Issuance costs	0	516,000
Stock Options
Stock Issuance costs	$ 0	$ 3,000

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 Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 15

-URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3291-108585

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