Summary of Significant Accounting Policies (Tables)

3 Months Ended

Mar. 31, 2014

Accounting Policies [Abstract]

Summary of Weighted-Average Anti-Dilutive Securities Excluded from Calculation of Diluted Net Loss Per Share

The following table summarizes the weighted-average anti-dilutive securities excluded from the calculation of diluted net loss per share (in common equivalent shares):

	Three Months Ended March 31,
	2014		2013
Convertible preferred stock outstanding		—		2,439,002
Warrants for convertible preferred stock		—		22,000
Warrants for common stock		96,000		—
Common stock options		634,750		123,250
Employee stock purchase plan		1,340		—
		732,090		2,584,252