Equity Incentive Plans, Employee Stock Purchase Plan and Stock-Based Compensation - Summary of the Status of Call Options (Details) - shares |
9 Months Ended | 12 Months Ended |
|---|---|---|
Sep. 30, 2021 |
Dec. 31, 2020 |
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| Disclosure Of Compensation Related Costs Sharebased Payments [Abstract] | ||
| Options vested and exercised | 257,834 | 257,834 |
| Options vested and outstanding | 4,445 | |
| Options unvested and outstanding | 4,445 | 8,890 |
| Total options granted | 266,724 | 266,724 |
| X | ||||||||||
- References No definition available.
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| X | ||||||||||
- Definition Gross number of share options (or share units) granted during the period. No definition available.
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| X | ||||||||||
- Definition Number of options outstanding, including both vested and non-vested options. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Number of non-vested options outstanding. No definition available.
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| X | ||||||||||
- Definition Number of share options (or share units) exercised during the current period. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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