Net Loss per Share (Tables)

3 Months Ended

Mar. 31, 2020

Summary of Basic and Diluted Net Loss per Share Attributable to Common Stockholders

Basic and diluted net loss per share attributable to common stockholders was calculated as follow:


	Three Months Ended March 31,
(in thousands, except per share data)	2020		2019
Numerator:
Net loss	$	(11,138)	$	(10,873)
Accruing dividends on Series A convertible preferred stock	—		(592)
Net loss attributable to common stockholders	$	(11,138)	$	(11,465)
Denominator:
Weighted average common shares outstanding—basic and diluted	20,014		1,718
Net loss per share attributable to common stockholders— basic and diluted	$	(0.56)	$	(6.67)

Schedule of Anti-dilutive Securities Excluded from Computation of Diluted Net Loss per Share Attributable to Common Stockholders

The Company excluded the following potential common shares, presented based on amounts outstanding at each period end, from the computation of diluted net loss per share attributable to common stockholders for the periods indicated because including them would have had an anti-dilutive effect:


	Three Months Ended March 31,
	2020	2019
Options to purchase common stock	1,468,205	1,037,089
Unvested restricted stock units	101,519	—
Warrants to purchase common stock (excluding prefunded warrants, which are included in basic shares outstanding)	9,776,871	493,927
	11,346,595	1,531,016