Significant Accounting Policies (Tables)

3 Months Ended

Mar. 31, 2015

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 or the exercise prices were greater than the average market price of the common shares.


	As of March 31,
	2015		2014
Stock options		1,933,158		1,414,355
Unvested restricted stock		98,535		203,753
Common stock warrants		899,340		—

		2,931,033		1,618,108