Net Loss per Share (Tables)

6 Months Ended

Jun. 30, 2017

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

Since the Company was in a loss position for all periods presented, diluted net loss per common share is the same as basic net loss per common share for all periods presented, because the inclusion of all potential common shares outstanding would have an anti-dilutive effect. The following weighted-average common stock equivalents were excluded from the calculation of diluted net loss per share for the periods presented, because including them would have an anti-dilutive effect:

	Three Months Ended June 30,				Six Months Ended June 30,
	2017		2016		2017		2016
Options to purchase common stock		8,006,323		6,113,707		7,561,888		6,087,898
Common stock warrants		3,428,248		326,991		3,266,653		326,991
Restricted stock units		110,494		—		111,530		—
Total		11,545,065		6,440,698		10,940,071		6,414,889