Significant Accounting Policies (Tables)

3 Months Ended

Mar. 31, 2016

Accounting Policies [Abstract]

Summary of Antidilutive Securities Excluded from Computation of Earnings 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 or the exercise prices were greater than the average market price of the common shares.

	As of March 31,
	2016	2015
Stock options	2,420,804	1,933,158
Unvested restricted stock	35,440	98,535
Restricted stock units	147,598	—
Common stock warrants	926,840	899,340
	3,530,682	2,931,033