Summary of Significant Accounting Policies (Tables)

9 Months Ended

Sep. 30, 2015

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 Months Ended		Nine Months Ended
	September 30,		September 30,
	2015	2014	2015	2014
Common stock subject to repurchase	45,000	49,375	45,000	71,875
Warrants to purchase common stock	118,881	96,000	118,881	96,000
Common stock options	1,037,500	683,500	1,037,500	683,500
Employee stock purchase plan	5,706	3,161	5,706	3,161
Total excluded securities	1,207,087	832,036	1,207,087	854,536