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Net Loss Per Share (Narrative) (Details)
3 Months Ended 9 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Sep. 30, 2013
Sep. 30, 2012
Net Loss Per Share [Abstract]        
Earnings per share, Potentially dilutive shares 589,000 551,000 598,000 585,000