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Convertible Preferred Stock and Stockholders' Equity (Tables) | 12 Months Ended
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Dec. 31, 2021
Equity [Abstract] |
Schedule of Common Stock Reserved | The following table shows shares of common stock reserved as of:
|  | December 31 |
|  | 2021 |  |  | 2020 |
Shares subject to options to purchase common stock |  |  | 95,413 |  |  |  | 144,303 |
Unvested restricted stock units |  |  | 347,111 |  |  |  | 269,138 |
Shares subject to warrants to purchase common stock |  |  | 2 |  |  |  | 2 |
Total |  |  | 442,526 |  |  |  | 413,443 |

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