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Basic and Diluted Net Loss Per Share (Details)
3 Months Ended 9 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Sep. 30, 2012
Sep. 30, 2011
Basic and Diluted Net Loss Per Share (Textual) [Abstract]        
Stock options outstanding excluded from the calculation of diluted net loss per share 8,075,898 8,075,898 8,067,318 8,067,318