Condensed Consolidated Statements of Cash Flows (Unaudited) (Parenthetical)	Apr. 30, 2011	Apr. 30, 2010
Cash flows from financing activities:
Convertible notes interest rates	4.00%	4.00%

Interest rate stated in the contractual debt agreement.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 22
-Article 5

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