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Net Loss Per Share | 9 Months Ended
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Sep. 30, 2021
Earnings Per Share [Abstract] |
Net Loss Per Share | Net Loss Per Share Basic net loss per share is computed by dividing the net loss by the weighted-average number of shares of common stock outstanding during the period. Diluted net loss per share is computed by giving effect to all potential shares of common stock, including convertible senior notes, outstanding stock options, stock related to unvested restricted stock units, and common stock issuable pursuant to the ESPP to the extent dilutive. Basic and diluted net loss per share was the same for each period presented, as the inclusion of all potential common shares outstanding would have been anti-dilutive. The net loss per share is allocated based on the participation rights of the Class A and Class B common shares as if the loss for the year has been distributed. As the liquidation and dividend rights are identical, the net loss is allocated on a proportionate basis. A reconciliation of the denominator used in the calculation of basic and diluted loss per share is as follows (in thousands, except share and per share data):
| Three months ended
| September 30, 2021 |  | September 30, 2020
| Class A |  | Class B |  | Class A |  | Class B
Numerator |  |  |  |  |  |  |
Net loss | $ | (5,731) |  |  | $ | (837) |  |  | $ | (8,566) |  |  | $ | (1,789) |
Denominator |  |  |  |  |  |  |
Weighted-average common shares outstanding - basic and diluted | 44,886,268 |  |  | 6,555,420 |  |  | 40,400,270 |  |  | 8,439,861 |
Basic and diluted net loss per share | $ | (0.13) |  |  | $ | (0.13) |  |  | $ | (0.21) |  |  | $ | (0.21) |
| Nine months ended
| September 30, 2021 |  | September 30, 2020
| Class A |  | Class B |  | Class A |  | Class B
Numerator |  |  |  |  |  |  |
Net loss | $ | (19,993) |  |  | $ | (3,413) |  |  | $ | (33,239) |  |  | $ | (7,146) |
Denominator |  |  |  |  |  |  |
Weighted-average common shares outstanding - basic and diluted | 43,496,619 |  |  | 7,424,993 |  |  | 39,661,228 |  |  | 8,526,955 |
Basic and diluted net loss per share | $ | (0.46) |  |  | $ | (0.46) |  |  | $ | (0.84) |  |  | $ | (0.84) |
The anti-dilutive securities excluded from the weighted-average shares used to calculate the diluted net loss per common share were as follows:
| As of
| September 30, 2021 |  | September 30, 2020
Shares subject to outstanding common stock options | 2,267,032 |  |  | 3,265,977 |
Shares subject to unvested restricted stock units | 2,036,160 |  |  | 2,974,719 |
Shares issuable pursuant to the ESPP | 55,561 |  |  | 95,084 |
In addition, as of September 30, 2021 and 2020, approximately 4.3 million shares of our Class A common stock underlying the conversion option in the Notes were excluded from the weighted-average shares used to calculate the diluted net loss per common share as they are considered anti-dilutive. We use the treasury stock method for calculating any potential dilutive effect of the conversion option on diluted net income per share, if applicable.

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