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Convertible Preferred Stock and Stockholders' Equity - Schedule of Common Stock Reserved (Details) - shares | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Class Of Stock [Line Items] |  |
Shares of common stock reserved | 4,135,344 | 3,657,356
Shares Subject to Options to Purchase Common Stock |  |
Class Of Stock [Line Items] |  |
Shares of common stock reserved | 1,443,940 | 2,645,714
Unvested Restricted Stock Units |  |
Class Of Stock [Line Items] |  |
Shares of common stock reserved | 2,691,375 | 249,500
Shares Subject to Warrants to Purchase Common Stock |  |
Class Of Stock [Line Items] |  |
Shares of common stock reserved | 29 | 956
Shares Subject to Term Debt Optional Conversion into Common Stock |  |
Class Of Stock [Line Items] |  |
Shares of common stock reserved |  | 761,186

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- Definition Aggregate number of nonredeemable convertible preferred 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 210.5-02.28) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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