Net Loss Per Share

12 Months Ended

Dec. 31, 2020

19. NET LOSS PER SHARE

Basic net loss per share is computed by dividing net loss attributable to common stockholders by the weighted average number of common shares outstanding during each period. The Redeemable Series A-1 Preferred Stock, which was outstanding prior to its redemption on July 27, 2020, and the Convertible and Redeemable Series A-2 Preferred Stock are considered a participating security. Net losses are not allocated to the Redeemable Series A-1 Preferred stockholders nor the Convertible and Redeemable Series A-2 stockholders, as they were not contractually obligated to share in the Company’s losses.

Diluted net loss per share is computed by dividing net loss attributable to common stockholders by the weighted average number of common and dilutive common equivalent shares outstanding for the period using the treasury-stock method or the as-converted method. During the year ended December 31, 2019, up until the warrant options were exercised (Note 12), shares issuable in connection with the warrant options were considered outstanding common shares for purposes of calculating net loss per share since they did not contain any conditions that must be satisfied for the holder to exercise the warrant. Potentially dilutive shares are comprised of restricted stock and shares of common stock underlying stock options outstanding under the Plans and warrants (other than warrant options) to purchase common stock. During the years ended December 31, 2020, 2019, and 2018, there is no difference in the number of shares used to calculate basic and diluted shares outstanding due to the Company’s net loss and potentially dilutive shares being anti-dilutive of basic and diluted net loss per share attributable to common stockholders of the Company for the years ended December 31, 2020, 2019, and 2018:

In thousands, except for net loss per share	2020			2019			2018
Net loss	$	(57,949	)	$	(23,557	)	$	(16,491	)
Convertible preferred stock deemed dividend, net of return from holders		—			—			(932	)
Accretion of redeemable series A-1 preferred stock		(17,601	)		(19,616	)		(3,605	)
Redeemable series A-1 preferred stock deemed dividend		(24,341	)		—			—
Convertible and redeemable series A-2 preferred stock dividend		(6,970	)		—			—
Net loss attributable to common stockholders – basic and diluted		(106,861	)		(43,173	)		(21,028	)
Weighted-average common shares outstanding – basic and diluted		16,479			8,789			7,533
Net loss per share attributable to common stockholders – basic and diluted	$	(6.48	)	$	(4.91	)	$	(2.79	)

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, 2020, 2019 and 2018:

	2020		2019		2018
Stock options		2,237,910		2,048,738		1,321,890
Restricted stock		187,989		153,352		112,637
Warrants		116,350		116,350		108,267