Net Loss Per Share

12 Months Ended

Dec. 31, 2020

Net loss per share is computed by dividing the net loss by the weighted average number of shares of common stock outstanding. Certain common stock participating securities, such as outstanding stock options, restricted stock units, and common stock 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 common stock participating securities as of December 31 were excluded from the computation of diluted net loss per share for the periods presented because their effect would have been anti-dilutive (in thousands):


	2020	2019	2018
Options to purchase common stock	3,379	4,610	5,395
Restricted stock units	1,574	1,681	1,147
Common stock warrants	508	1,116	535