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Net Loss per Share Attributable to Common Stockholders
12 Months Ended
Dec. 31, 2020
Earnings Per Share [Abstract]  
Net Loss per Share Attributable to Common Stockholders Net Loss per Share Attributable to Common Stockholders
The following table sets forth the computation of basic and diluted net loss per share attributable to common stockholders:

Year Ended December 31,

202020192018
Class AClass BClass AClass BCommon
(in thousands, except per share data)
Net loss attributable to common stockholders
$(70,955)$(48,415)$(18,259)$(87,569)$(87,164)
Weighted-average shares used in computing net loss per share attributable to common stockholders, basic and diluted
178,189 121,585 25,243 121,063 80,981 
Net loss per share attributable to common stockholders, basic and diluted
$(0.40)$(0.40)$(0.72)$(0.72)$(1.08)
Since the Company was in a loss position for all periods presented, basic net loss per share is the same as diluted net loss per share as the inclusion of all potential common shares outstanding would have been antidilutive. The potential shares of common stock that were excluded from the computation of diluted net loss per share attributable to common stockholders for the periods presented because including them would have been antidilutive are as follows:
December 31,
202020192018
(in thousands)
Convertible senior notes
15,363 — — 
Shares subject to repurchase
3,872 5,945 6,738 
Unexercised stock options
18,186 21,191 25,087 
Unvested restricted stock and RSUs
8,629 6,508 — 
Redeemable convertible preferred stock— — 165,658 
Redeemable convertible preferred stock warrants— — 177 
Vested and unreleased RSUs21 — — 
Shares issuable pursuant to the ESPP133 438 — 
Total
46,204 34,082 197,660