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Sale Of Common Shares And Issuance Of Common Stock Warrants (Details) (USD $) | 3 Months Ended | 9 Months Ended |  | 12 Months Ended | 9 Months Ended
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Sep. 30, 2011 | Sep. 30, 2011 | Sep. 30, 2010 | Dec. 31, 2010 Series A Common Share Warrants [Member] | Sep. 30, 2011 Series B Common Share Warrants [Member]
Sale Of Common Shares And Issuance Of Common Stock Warrants [Line Items] |  |  |  |  |
Additional share of common stock issued | 0 | 0 |  |  |
Common share warrants outstanding | 227,376 | 227,376 | 227,376 | 35,992 | 35,992
Common share warrants exercise price |  |  |  |  | $ 76.41
Common share warrants expiration dates |  |  |  | Jun. 10, 2011 | Dec. 10, 2011

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