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Common Stock - Schedule of Reserved Common Stock for Future Issuances (Details) - shares | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Redeemable convertible preferred stock and warrants | 11,221,882 | 29,782,878
Redeemable convertible preferred stock and warrants |  |
Redeemable convertible preferred stock and warrants | 0 | 26,193,432
Common stock options issued and outstanding |  |
Redeemable convertible preferred stock and warrants | 4,996,945 | 3,137,776
Common stock available for future grant |  |
Redeemable convertible preferred stock and warrants | 5,321,687 | 451,670
Restricted stock units outstanding |  |
Redeemable convertible preferred stock and warrants | 53,250 | 0
Shares available for future purchase under ESPP |  |
Redeemable convertible preferred stock and warrants | 850,000 | 0

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- Definition Aggregate number of common shares reserved for future issuance. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.29) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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