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Fair Value Measurement and Marketable Securities (Tables) | 12 Months Ended
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Dec. 31, 2021
Fair Value Disclosures [Abstract] |
Schedule of Financial Assets Measured and Recognized at Fair Value | As of December 31, 2021, financial assets measured and recorded at fair value are as follows (in thousands):
|  |  |  | December 31, 2021 |
|  |  |  | Amortized Cost |  |  | Gross Unrealized Gains |  |  | Gross Unrealized Losses |  |  | Estimated Fair Value |
Assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. government securities |  | Level 1 |  | $ | 122,657 |  |  | $ | — |  |  | $ | (592 | ) |  | $ | 122,065 |
Corporate bonds |  | Level 2 |  |  | 76,628 |  |  |  | 8 |  |  |  | (127 | ) |  |  | 76,509 |
Commercial paper |  | Level 2 |  |  | 77,444 |  |  |  | — |  |  |  | (1 | ) |  |  | 77,443 |
Marketable securities |  |  |  |  | 276,729 |  |  |  | 8 |  |  |  | (720 | ) |  |  | 276,017 |
Money market funds(1) |  | Level 1 |  |  | 91,825 |  |  |  | — |  |  |  | — |  |  |  | 91,825 |
Total fair value of assets |  |  |  | $ | 368,554 |  |  | $ | 8 |  |  | $ | (720 | ) |  | $ | 367,842 |
(1) | Included in cash and cash equivalents on the balance sheet
As of December 31, 2020, financial assets measured and recognized at fair value are as follows (in thousands):
|  |  |  | December 31, 2020 |
|  |  |  | Amortized Cost |  |  | Gross Unrealized Gains |  |  | Gross Unrealized Losses |  |  | Estimated Fair Value |
Assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. government securities |  | Level 1 |  | $ | 80,020 |  |  | $ | 10 |  |  | $ | — |  |  | $ | 80,030 |
Corporate bonds |  | Level 2 |  |  | 72,573 |  |  |  | 11 |  |  |  | (14 | ) |  |  | 72,570 |
Commercial paper |  | Level 2 |  |  | 63,948 |  |  |  | — |  |  |  | — |  |  |  | 63,948 |
Marketable securities |  |  |  |  | 216,541 |  |  |  | 21 |  |  |  | (14 | ) |  |  | 216,548 |
Money market funds(1) |  | Level 1 |  |  | 67,065 |  |  |  | — |  |  |  | — |  |  |  | 67,065 |
Total fair value of assets |  |  |  | $ | 283,606 |  |  | $ | 21 |  |  | $ | (14 | ) |  | $ | 283,613 |
(1) | Included in cash and cash equivalents on the balance sheet

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- Definition Tabular disclosure of the fair value of financial instruments, including financial assets and financial liabilities, and the measurements of those instruments, assets, and liabilities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=123594938&loc=d3e13467-108611 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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