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Fair Value Measurements (Tables) | 12 Months Ended
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Dec. 31, 2021
Fair Value Disclosures [Abstract] |
Summary of Cash Equivalents and Marketable Securities Measured at Fair Value | The following tables summarize the Company’s cash equivalents and marketable securities measured at fair value (in thousands):
|  |  |  |  |  | Fair Value Measurements Using |
As of December 31, 2021 |  | Total |  |  | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |  | Significant Other Observable Inputs (Level 2) |  |  | Significant Unobservable Inputs (Level 3) |
Marketable securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. Treasury securities |  | $ | 65,372 |  |  | $ | 65,372 |  |  | $ | — |  |  | $ | — |
Negotiable certificates of deposit |  |  | 3,873 |  |  |  | — |  |  |  | 3,873 |  |  |  | — |
Corporate debt securities |  |  | 15,850 |  |  |  | — |  |  |  | 15,850 |  |  |  | — |
Total |  | $ | 85,095 |  |  | $ | 65,372 |  |  | $ | 19,723 |  |  | $ | — |
|  |  |  |  |  | Fair Value Measurements Using |
As of December 31, 2020 |  | Total |  |  | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |  | Significant Other Observable Inputs (Level 2) |  |  | Significant Unobservable Inputs (Level 3) |
Cash equivalents: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Negotiable certificates of deposit |  | $ | 720 |  |  | $ | — |  |  | $ | 720 |  |  | $ | — |
Marketable securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Corporate debt securities |  |  | 6,679 |  |  |  | — |  |  |  | 6,679 |  |  |  | — |
Total |  | $ | 7,399 |  |  | $ | — |  |  | $ | 7,399 |  |  | $ | — |
Schedule of Reconciliation of Preferred Stock Warrant Liability Measured at Fair Value Using Level 3 Unobservable Inputs | The following table provides a reconciliation of the preferred stock warrant liability measured at fair value using Level 3 unobservable inputs (in thousands):
Balance at December 31, 2018 |  | $ | 30 |
Change in fair value |  |  | 15 |
Balance at December 31, 2019 |  |  | 45 |
Change in fair value |  |  | 75 |
Reclassification of warrant liability to stockholders’ equity |  |  | (120 | )
Balance at December 31, 2020 |  | $ | — |

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- Definition Tabular disclosure of assets, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, by class that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258 + Details
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- Definition Tabular disclosure of the fair value measurement of liabilities using significant unobservable inputs (Level 3), a reconciliation of the beginning and ending balances, separately presenting changes attributable to the following: (1) total gains or losses for the period (realized and unrealized), segregating those gains or losses included in earnings (or changes in net assets), and gains or losses recognized in other comprehensive income (loss) and a description of where those gains or losses included in earnings (or changes in net assets) are reported in the statement of income (or activities); (2) purchases, sales, issues, and settlements (each type disclosed separately); and (3) transfers in and transfers out of Level 3 (for example, transfers due to changes in the observability of significant inputs) by class of liability. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=123874694&loc=d3e19279-110258 + Details
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