Basic and diluted net loss per share attributable to common stockholders is presented in conformity with the two-class method required for participating securities. Prior to the automatic conversion of all of its convertible preferred stock outstanding into Class B common stock upon the IPO, the Company considered all series of its convertible preferred stock to be participating securities.

Under the two-class method, the net loss attributable to common stockholders is not allocated to the convertible preferred stock as the holders of the convertible preferred stock do not have a contractual obligation to share in the Company’s losses. Basic net loss per share attributable to common stockholders is calculated by dividing the net loss by the weighted-average number of shares of common stock outstanding during the period, less shares subject to repurchase. The diluted net loss per share


	Year Ended December 31,
(In thousands, except per share data)	2021		2020
Numerator:
Net loss attributable to Class A and Class B common shareholders	$	(60,135)	$	(15,776)


Denominator:
Weighted-average shares in computing net loss per share attributable to Class A and Class B common stockholders, basic and diluted	23,433		12,735




Basic loss per common share	$	(2.57)	$	(1.24)
Diluted loss per common share	$	(2.57)	$	(1.24)

The rights, including the liquidation and dividend rights, of the holders of Class A and Class B common stock are identical, except with respect to voting and conversion. Each share of Class A common stock is entitled to one vote per share and each share of Class B common stock is entitled to 20 votes per share. Each share of Class B common stock is convertible into a share of Class A common stock voluntarily at any time by the holder, and automatically upon certain events. The Class A common stock has no conversion rights. As the liquidation and dividend rights are identical for Class A and Class B common stock, the undistributed earnings are allocated on a proportional basis and the resulting net loss per share attributable to common stockholders will, therefore, be the same for both Class A and Class B common stock on an individual or combined basis.

Since the Company was in a net loss position for the years ended December 31, 2021 and 2020, there is no difference between the number of shares used to calculate basic and diluted loss per share. The potential shares of common stock that were excluded from the computation of diluted net loss per share attributable to common stockholders for the period presented because including them would have been antidilutive are as follows:


	Year Ended December 31,
	2021	2020
Convertible preferred stock	—	19,074
Founder awards where performance has been met	180	—
Vested RSUs	4	—
Stock options	4,420	4,191
Total	4,604	23,265

Founder awards where performance has not been met of 1,620 are excluded from the above table because the stock-price hurdles for those awards had not been met as of December 31, 2021.