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Fair Value Measurements and Fair Value of Financial Instruments (Tables) | 12 Months Ended
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Dec. 31, 2021
Fair Value Disclosures [Abstract] |
Schedule of Financial Instruments Measured at Fair Value on Recurring Basis | The following tables set forth our financial instruments measured at fair value on a recurring basis by level within the fair value hierarchy at December 31, 2021 and 2020:
|  |  | December 31, 2021 |
| Fair Value Hierarchy Level |  | Amortized Cost |  |  | Gross Unrealized Gains |  |  | Gross Unrealized Losses |  |  | Fair Value |
Assets |  |  | (in thousands) |
Cash and cash equivalents: |  |  |  |  |  |  |  |  |  |  |  |  |
Cash | Level 1 |  | $ | 27,834 |  |  | $ | — |  |  | $ | — |  |  | $ | 27,834 |
Money market funds | Level 1 |  |  | 17,555 |  |  |  | — |  |  |  | — |  |  |  | 17,555 |
Commercial paper | Level 2 |  |  | 23,597 |  |  |  | — |  |  |  | (1 | ) |  |  | 23,596 |
Total cash and cash equivalents |  |  | $ | 68,986 |  |  | $ | — |  |  | $ | (1 | ) |  | $ | 68,985 |
Investments: |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. Treasury securities | Level 1 |  |  | 45,290 |  |  |  | — |  |  |  | (73 | ) |  |  | 45,217 |
Commercial paper | Level 2 |  |  | 61,941 |  |  |  | — |  |  |  | (22 | ) |  |  | 61,919 |
Corporate debt | Level 2 |  |  | 58,498 |  |  |  | — |  |  |  | (74 | ) |  |  | 58,424 |
Asset backed securities | Level 2 |  |  | 13,899 |  |  |  |  |  |  | (25 | ) |  |  | 13,874 |
U.S. government agency securities | Level 2 |  |  | 24,714 |  |  |  | — |  |  |  | (46 | ) |  |  | 24,668 |
Total investments |  |  |  | 204,342 |  |  |  | — |  |  |  | (240 | ) |  |  | 204,102 |
Total assets measured at fair value |  |  | $ | 273,328 |  |  | $ | — |  |  | $ | (241 | ) |  | $ | 273,087 |
|  |  | December 31, 2020 |
| Fair Value Hierarchy Level |  | Amortized Cost |  |  | Gross Unrealized Gains |  |  | Gross Unrealized Losses |  |  | Fair Value |
Assets |  |  | (in thousands) |
Cash and cash equivalents: |  |  |  |  |  |  |  |  |  |  |  |  |
Cash | Level 1 |  | $ | 4,788 |  |  | $ | — |  |  | $ | — |  |  | $ | 4,788 |
Money market funds | Level 1 |  |  | 381,412 |  |  |  | — |  |  |  | — |  |  |  | 381,412 |
Total assets measured at fair value |  |  | $ | 386,200 |  |  | $ | — |  |  | $ | — |  |  | $ | 386,200 |
Schedule of Contractual Maturities of Investments | The following table presents the contractual maturities of our investments as of December 31, 2021 (in thousands):
|  | December 31, 2021 |
|  | Fair Value |
Due in less than one year |  | $ | 176,985 |
Due in one to five years |  |  | 27,117 |
Total |  | $ | 204,102 |

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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 maturities of an entity's investments as well as any other information pertinent to the investments. + References No definition available. + Details
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