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Net Loss Per Share (Tables) | 12 Months Ended
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Dec. 31, 2021
Earnings Per Share [Abstract] |
Schedule of Earnings Per Share, Basic and Diluted | 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):
| Year ended
| December 31, 2021 |  | December 31, 2020 |  | December 31, 2019
| Class A |  | Class B |  | Class A |  | Class B |  | Class A |  | Class B
Numerator |  |  |  |  |  |  |  |  |  |  |
Net loss | $ | (32,724) |  |  | $ | (5,006) |  |  | $ | (39,966) |  |  | $ | (8,432) |  |  | $ | (38,135) |  |  | $ | (9,344) |
Denominator |  |  |  |  |  |  |  |  |  |  |
Weighted-average common shares outstanding - basic and diluted | 44,343,177 |  |  | 6,783,333 |  |  | 40,007,839 |  |  | 8,440,327 |  |  | 37,190,224 |  |  | 9,112,432 |
Basic and diluted net loss per share | $ | (0.74) |  |  | $ | (0.74) |  |  | $ | (1.00) |  |  | $ | (1.00) |  |  | $ | (1.03) |  |  | $ | (1.03) |
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share | 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 December 31,
| 2021 |  | 2020 |  | 2019
Shares subject to outstanding common stock options | 1,755,180 |  |  | 2,903,167 |  |  | 4,353,167 |
Shares subject to unvested restricted stock units | 1,891,699 |  |  | 2,904,616 |  |  | 3,039,020 |
Shares issuable pursuant to the ESPP | 53,877 |  |  | 94,390 |  |  | 76,466 |

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- Definition Tabular disclosure of securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) in the future that were not included in the computation of diluted EPS because to do so would increase EPS amounts or decrease loss per share amounts for the period presented, by antidilutive securities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=124432515&loc=d3e3550-109257 + Details
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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=124432515&loc=d3e3550-109257 + Details
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