Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 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:

	Year Ended December 31,
	2015		2014
Common stock subject to repurchase		45,000		70,625
Warrants to purchase common stock		118,881		118,881
Common stock options		1,037,500		683,500
Employee stock purchase plan		22,818		12,627
Total excluded securities		1,224,199		885,633