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Stockholders' Equity (Tables) | 12 Months Ended
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Dec. 31, 2021
Stockholders' Equity Note [Abstract] |
Summary of Stock Option Activity | The following tables summarize the activity under the Stock Plans:
| Outstanding Options |  | Weighted Average Exercise Price |  | Weighted Average Remaining Contractual Life (in years)
Balance at December 31, 2019 | 2,205,015 |  |  | $ | 0.36 |  |  | 3.89
Granted | 6,296,302 |  |  | $ | 0.14 |  |  |
Exercised | (2,912) |  |  | $ | 0.37 |  |  |
Forfeited / canceled | (275,695) |  |  | $ | 0.43 |  |  |
Balance at December 31, 2020 | 8,222,710 |  |  | $ | 0.19 |  |  | 8.30
Granted | — |  |  |  |  |
Exercised | (171,118) |  |  | 0.42 |  |  |
Forfeited / canceled | (158,735) |  |  | 0.14 |  |  |
Balance as of December 31, 2021 | 7,892,857 |  |  | $ | 0.19 |  |  | 7.31
Vested and expected to vest at December 31, 2021 | 7,872,978 |  |  |  |  |
Schedule of RSU and Performance Award Activity | RSU award and performance award activity for the year ended December 31, 2021 is as follows:
| Restricted Stock Outstanding
| Outstanding |  | Weighted-average grant date fair value
Balance at December 31, 2020 | — |  |  |
Granted - RSU awards | 769,505 |  |  | 7.34
Granted - performance awards | 2,137,500 |  |  | 7.35
Balance at December 31, 2021 | 2,907,005 |  |  | 7.35
Expected to vest | 769,505 |  |  |

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