Sale Of Common Shares And Issuance Of Common Stock Warrants (Details) (USD $)	3 Months Ended	6 Months Ended		12 Months Ended	6 Months Ended
	Jun. 30, 2011	Jun. 30, 2011	Jun. 30, 2010	Dec. 31, 2010 Series A Common Share Warrants [Member]	Jun. 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