Net Loss Per Share (Tables)

6 Months Ended

Jun. 30, 2018

Earnings Per Share [Abstract]

Summary of Potentially Dilutive Securities Excluded from Computation of Diluted Net Loss Per Share

The following weighted-average outstanding shares of potentially dilutive securities were excluded from the computation of diluted net loss per share for the periods presented, because including them would have been anti-dilutive:

	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2018		2017		2018		2017
Options to purchase common stock		7,351,681		6,907,038		7,329,531		7,048,959
Total		7,351,681		6,907,038		7,329,531		7,048,959