Summary of Significant Accounting Policies (Tables)

9 Months Ended

Sep. 30, 2016

Accounting Policies [Abstract]

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

The following table sets forth the outstanding potentially dilutive securities that have been excluded from the calculation of diluted net loss per share because to do so would be anti-dilutive:

	Three and Nine Months Ended September 30,
	2016		2015
Common stock subject to repurchase		45,000		45,000
Warrants to purchase common stock		3,323,876		118,881
Common stock options		1,275,624		1,037,500
Employee stock purchase plan		10,938		5,706
Total excluded securities		4,655,438		1,207,087