Net Loss Per Common Share

3 Months Ended

Mar. 31, 2020

Basic and diluted net loss per common share is determined by dividing net loss by the weighted average common shares and pre-funded warrants outstanding during the period. For the periods when there is a net loss, shares underlying stock options and RSUs have been excluded from the calculation of diluted net loss per common share because the effect of including such shares would be anti-dilutive. Therefore, the weighted average common shares used to calculate both basic and diluted net loss per common share would be the same.

The following table sets forth the computation of basic and diluted net loss per common share for the periods indicated:



	Three Months Ended March 31,
	2020			2019
Basic and diluted net loss per common share calculation:
Net loss	$	(15,076	)	$	(12,501	)
Weighted average common shares outstanding - basic and dilutive	53,426			41,427
Net loss per share of common stock - basic and diluted	$	(0.28	)	$	(0.30	)

The following potentially dilutive securities have been excluded from the computations of diluted weighted average common shares outstanding for the periods presented, as the effect of including such shares would be anti-dilutive:



	Three Months Ended March 31,
	2020	2019
Stock options outstanding	6,635	5,844
Restricted stock units	1,401	664
Total	8,036	6,508