Net Loss Per Share

6 Months Ended

Jun. 30, 2018

Net loss per share is computed by dividing the net loss by the weighted average number of shares of common stock outstanding. Outstanding stock options, restricted stock units and warrants have not been included in the calculation of diluted net loss per share because to do so would be anti-dilutive. Accordingly, the numerator and the denominator used in computing both basic and diluted net loss per share for each period are the same.

The following shares underlying outstanding options, restricted stock units and warrants were excluded from the computation of basic and diluted net loss per share for the periods presented because their effect would have been anti-dilutive (in thousands):



	Three Months Ended June 30,		Six Months Ended June 30,
	2018	2017	2018	2017
Options to purchase common stock	5,525	5,409	5,595	5,284
Restricted stock units	1,193	272	1,106	255
Common stock warrants	468	332	413	332