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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] |
Summary of Cash Equivalents and Short-term Investments | The following is a summary of the Company’s cash equivalents and short-term investments (in thousands):
| December 31, 2021
| Amortized Cost Basis |  | Unrealized Gains |  | Unrealized Loses |  | Estimated Fair Value
Level 1 |  |  |  |  |  |  |
Money market funds | $ | 10,311 |  |  | $ | — |  |  | $ | — |  |  | $ | 10,311 |
Level 2 |  |  |  |  |  |  |
U.S. government and agency securities | 62,268 |  |  | — |  |  | (218) |  |  | 62,050 |
Commercial paper | 177,215 |  |  | 1 |  |  | (61) |  |  | 177,155 |
Corporate bonds | 47,323 |  |  | — |  |  | (39) |  |  | 47,284 |
Total cash equivalents and short-term investments | 297,117 |  |  | 1 |  |  | (318) |  |  | 296,800 |
Less: Cash equivalents | (25,808) |  |  | — |  |  | 1 |  |  | (25,807) |
Total short-term investments | $ | 271,309 |  |  | $ | 1 |  |  | $ | (317) |  |  | $ | 270,993 |
| December 31, 2020
| Amortized Cost Basis |  | Unrealized Gains |  | Unrealized Loses |  | Estimated Fair Value
Level 1 |  |  |  |  |  |  |
Money market funds | $ | 178 |  |  | $ | — |  |  | $ | — |  |  | $ | 178 |
Level 2 |  |  |  |  |  |  |
U.S. government and agency securities | 328,583 |  |  | 121 |  |  | (5) |  |  | 328,699 |
Commercial paper | 97,324 |  |  | — |  |  | (5) |  |  | 97,319 |
Total cash equivalents and short-term investments | 426,085 |  |  | 121 |  |  | (10) |  |  | 426,196 |
Less: Cash equivalents | (58,894) |  |  | — |  |  | 3 |  |  | (58,891) |
Total short-term investments | $ | 367,191 |  |  | $ | 121 |  |  | $ | (7) |  |  | $ | 367,305 |

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- Definition Tabular disclosure of the components of cash, cash equivalents, and investments. + References No definition available. + Details
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