Condensed Consolidated Statement of Changes in Shareholders' Equity (Parenthetical) (Unaudited) (USD $)	3 Months Ended	12 Months Ended
Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2010
Lower price range for exercise of stock option	$ 2.44	$ 2.44	$ 2.44	$ 2.44
Higher price range for exercise of stock option	$ 6.27	$ 6.27	$ 6.27	$ 6.27
Common Shares
Lower price range for exercise of stock option	$ 2.44	$ 2.44	$ 2.44	$ 2.44
Higher price range for exercise of stock option	$ 6.27	$ 6.27	$ 6.27	$ 6.27
Additional Paid-in Capital
Lower price range for exercise of stock option	$ 2.44	$ 2.44	$ 2.44	$ 2.44
Higher price range for exercise of stock option	$ 6.27	$ 6.27	$ 6.27	$ 6.27

The ceiling of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range.

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph 64

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (g)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

Name:	us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeUpperRangeLimit
Namespace Prefix:	us-gaap
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration