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Summary of Significant Accounting Policies (Details 7)
3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2012
Sep. 30, 2012
Dec. 31, 2011
Options
     
Net Loss Per Share      
Antidilutive common stock equivalents (in shares) 2,336 3,462 293
Outstanding options (in shares)     2,426
Warrants
     
Net Loss Per Share      
Antidilutive common stock equivalents (in shares)     27,427
Outstanding warrants (in shares)     55,391