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Net (Loss) Income Per Share Attributable to Common Stockholders | 12 Months Ended
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Dec. 31, 2021
Earnings Per Share [Abstract] |
Net (Loss) Income Per Share Attributable to Common Stockholders | Net (Loss) Income Per Share Attributable to Common Stockholders The following table shows the computation of basic and diluted net (loss) income per share attributable to common stockholders (in thousands, except per share amounts):
| Year Ended December 31,
| 2021 |  | 2020 |  | 2019
Numerator: |  |  |  |  |
Net (loss) income | $ | (108,664) |  |  | $ | 9,896 |  |  | $ | 7,443 |
Less: amounts attributable to redeemable convertible preferred stock | — |  |  | (2,673) |  |  | (2,021) |
Net (loss) income attributable to common stockholders—basic | (108,664) |  |  | 7,223 |  |  | 5,422 |
Add: undistributed earnings reallocated to common stockholders | — |  |  | 39 |  |  | 54 |
Net (loss) income attributable to common stockholders—diluted | $ | (108,664) |  |  | $ | 7,262 |  |  | $ | 5,476 |
Denominator: |  |  |  |  |
Weighted-average common stock used in computing net (loss) income per share attributable to common stockholders—basic | 161,424 |  |  | 124,709 |  |  | 123,826 |
Effect of potentially dilutive securities: |  |  |  |  |
Stock options | — |  |  | 2,444 |  |  | 4,161 |
Restricted stock units | — |  |  | 106 |  |  | 559 |
Weighted-average common stock used in computing net (loss) income per share attributable to common stockholders—diluted | 161,424 |  |  | 127,259 |  |  | 128,546 |
Net (loss) income per share attributable to common stockholders—basic and diluted | $ | (0.67) |  |  | $ | 0.06 |  |  | $ | 0.04 |
Net (loss) income per share attributable to common stockholders—diluted | $ | (0.67) |  |  | $ | 0.06 |  |  | $ | 0.04 |
The following table presents the number of options, RSUs and restricted stock excluded from the calculation of diluted net (loss) income per share attributable to common stockholders because they are anti-dilutive (in thousands):
| As of December 31,
| 2021 |  | 2020 |  | 2019
Options to purchase common stock | 15,274 |  |  | 12,529 |  |  | 7,256 |
Restricted stock units | 3,577 |  |  | 2,235 |  |  | 884 |
Employee stock purchase plan | 96 |  |  | — |  |  | — |
Restricted stock | 50 |  |  | 100 |  |  | 200 |
Total | 18,997 |  |  | 14,864 |  |  | 8,340 |

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