Net Loss per Share (Tables)

12 Months Ended

Dec. 31, 2019

Schedule of Earnings Per Share, Basic and Diluted

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


	Year Ended December 31,
(in thousands, except per share data)	2019		2018		2017
Numerator:
Net loss	$	(52,807)	$	(33,285)	$	(21,994)
Accruing dividends on Series A convertible preferred stock	(592)		(3,000)		(3,000)
Adjustment to accumulated deficit in connection with repurchase of Series Seed convertible preferred stock	—		(22)		—
Net loss attributable to common stockholders	$	(53,399)	$	(36,307)	$	(24,994)
Denominator:
Weighted average shares of common stock—basic and diluted	11,530		459		458
Net loss per share attributable to common stockholders— basic and diluted	$	(4.63)	$	(79.15)	$	(54.58)

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

The Company excluded the following potential shares of common stock, presented based on amounts outstanding at each period end and adjusted for the Exchange Ratio and Reverse Stock Split, 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:


	Year Ended December 31,
	2019	2018	2017
Options to purchase common stock and unvested restricted stock units	1,398,802	798,311	474,282
Convertible preferred stock (as converted to common stock)	—	3,808,894	3,613,069
Warrants to purchase common stock (excluding prefunded warrants, which are included in basic shares outstanding)	9,776,871	489,079	423,567
	11,175,673	5,096,284	4,510,918