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Summary of Significant Accounting Policies (Tables)
9 Months Ended
Sep. 30, 2012
Summary of Significant Accounting Policies  
Summarizes outstanding securities not included in computation of diluted net loss per common share as their inclusion would be anti-dilutive

 

 

 

 

September 30,

 

 

 

2012

 

2011

 

Common stock options

 

6,007,123

 

5,918,559

 

Unvested restricted common stock

 

58,936

 

86,871