Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2014

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

	Years Ended December 31,
	2014		2013		2012
Common stock options		8,829,343		6,814,417		5,521,584
Unvested restricted stock		744,514		45,000		35,122