Condensed Consolidated Statements Of Stockholders' Equity (Parenthetical) (USD $)	Oct. 31, 2011
Condensed Consolidated Statements Of Stockholders' Equity [Abstract]
Common shares, share price	$ 7.50

The dollar amount received by subsidiary or equity investee for each share of common stock issued or sold in the stock transaction.

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

-Publisher SEC

-Name Staff Accounting Bulletin (SAB)

-Number Topic 5

-Section H

Name:	us-gaap_SaleOfStockPricePerShare
Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant