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Fair Value Measurements (Tables) | 12 Months Ended
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Dec. 31, 2021
Fair Value Disclosures [Abstract] |
Assets and Liabilities Carried at Fair Value Measured on Recurring Basis | The following tables summarize the Company’s assets carried at fair value measured on a recurring basis at December 31, 2021 and 2020, respectively, by valuation hierarchy (in thousands):
|  | December 31, 2021 |
|  | Carrying Value |  |  | Gross Unrealized Gains |  |  | Gross Unrealized Losses |  |  | Fair Value |  |  | Cash Equivalents |  |  | Marketable Securities |
Level 1: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Money market funds |  | $ | 155,551 |  |  | $ | — |  |  | $ | — |  |  | $ | 155,551 |  |  | $ | 155,551 |  |  | $ | — |
Subtotal |  | $ | 155,551 |  |  | $ | — |  |  | $ | — |  |  | $ | 155,551 |  |  | $ | 155,551 |  |  | $ | — |
Level 2: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Commercial paper |  | $ | 49,514 |  |  | $ | — |  |  | $ | — |  |  | $ | 49,514 |  |  | $ | 16,549 |  |  | $ | 32,965 |
Subtotal |  | $ | 49,514 |  |  | $ | — |  |  | $ | — |  |  | $ | 49,514 |  |  | $ | 16,549 |  |  | $ | 32,965 |
Total |  | $ | 205,065 |  |  | $ | — |  |  | $ | — |  |  | $ | 205,065 |  |  | $ | 172,100 |  |  | $ | 32,965 |
|  | December 31, 2020 |
|  | Carrying Value |  |  | Gross Unrealized Gains |  |  | Gross Unrealized Losses |  |  | Fair Value |  |  | Cash Equivalents |  |  | Marketable Securities |
Level 1: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Money market funds |  | $ | 23,538 |  |  | $ | — |  |  | $ | — |  |  | $ | 23,538 |  |  | $ | 23,538 |  |  | $ | — |
Total |  | $ | 23,538 |  |  | $ | — |  |  | $ | — |  |  | $ | 23,538 |  |  | $ | 23,538 |  |  | $ | — |

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- Definition Tabular disclosure of assets and liabilities, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, 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://www.xbrl.org/2003/role/disclosureRef -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://www.xbrl.org/2003/role/disclosureRef -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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