Significant Accounting Policies (Tables)

6 Months Ended

Jun. 30, 2014

Accounting Policies [Abstract]

Summary of Common Stock Equivalents Excluded from Calculation of Diluted Net Loss Per Share

The following common stock equivalents were excluded from the calculation of diluted net loss per share applicable to common stockholders for the periods indicated because including them would have had an anti-dilutive effect.

	As of June 30,
	2014		2013
Convertible preferred stock		—		7,125,982
Stock options		1,490,979		929,830
Unvested restricted stock		177,178		258,875
Preferred stock warrants		—		30,708
		1,668,157		8,345,395