Net Loss Per Share (Tables)

12 Months Ended

Dec. 31, 2021

Earnings Per Share [Abstract]

Computation of Basic and Diluted Net (Loss) Income Per Share Attributable to Common Stockholders

The following table summarizes the computation of basic and diluted net loss per share attributable to common stockholders of the Company:

In thousands, except for net loss per share	2021			2020			2019
Net loss	$	(25,325	)	$	(57,949	)	$	(23,557	)
Accretion of redeemable series A-1    preferred stock		—			(17,601	)		(19,616	)
Redeemable series A-1 preferred stock    deemed dividend		—			(24,341	)		—
Convertible and redeemable series A-2    preferred stock dividend		(16,400	)		(6,970	)		—
Net loss attributable to common    stockholders – basic and diluted		(41,725	)		(106,861	)		(43,173	)
Weighted-average common shares    outstanding – basic and diluted		26,724			16,479			8,789
Net loss per share attributable to common    stockholders – basic and diluted	$	(1.56	)	$	(6.48	)	$	(4.91	)

Equity Shares Excluded from Calculation of Diluted Net Loss per Share Attributable to Common Stockholders

The following equity shares were excluded from the calculation of diluted net loss per share attributable to common stockholders because their effect would have been anti-dilutive for the years ended December 31:

	2021		2020		2019
Stock options		1,687,413		2,237,910		2,048,738
Restricted stock		1,693,923		187,989		153,352
SARs		3,000,000		—		—
Warrants		—		116,350		116,350