9. WARRANTS (Details)	6 Months Ended
Oct. 31, 2013
Warrants outstanding	374,803
December 19, 2008
Warrants outstanding	101,523
Exercise price per share warrants	1.4775
Expiration date of warrants	Dec. 19, 2013
August 30, 2012
Warrants outstanding	273,280
Exercise price per share warrants	2.4700
Expiration date of warrants	Aug. 30, 2018

Exercise price per share or per unit of warrants or rights outstanding.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 235

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.4-08.(i)(4))

-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 08

-Paragraph i

-Subparagraph 4

-Article 4

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Namespace Prefix:	us-gaap_
Data Type:	us-types:perUnitItemType
Balance Type:	na
Period Type:	instant