Summary of Significant Accounting Policies (Tables)

9 Months Ended

Sep. 30, 2013

Summary of Significant Accounting Policies

Summary of the outstanding securities not included in the computation of diluted net loss per common share as their inclusion would be anti-dilutive

	September 30,
	2013	2012
Common stock options	6,736,209	6,007,123
Unvested restricted common stock	42,500	58,936