Net Loss per Common Share (Tables)

12 Months Ended

Dec. 31, 2015

Earnings Per Share [Abstract]

Antidilutive Securities Excluded From Computation of Diluted Net Loss per Common Share

The following table represents the potential common shares issuable pursuant to outstanding securities as of the related period end dates that were excluded from the computation of diluted net loss per common share as their inclusion would have an antidilutive effect:

	As of December 31,
	2015		2014		2013
Unvested restricted common stock awards		233,413		666,091		790,216
Unvested restricted stock units		427,605		721,293		—
Vested and unvested options		3,137,529		313,565		—