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Marketable Securities (Tables) | 9 Months Ended
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Sep. 30, 2021
Investments Debt And Equity Securities [Abstract] |
Summary of Marketable Securities | The following table summarizes the marketable securities (in thousands):
As of December 31, 2020 |  | Amortized Cost |  |  | Unrealized Gains |  |  | Unrealized Losses |  |  | Fair Value |
U.S. treasury securities |  | $ | 10,003 |  |  | $ | 3 |  |  | $ | — |  |  | $ | 10,006 |
Corporate notes |  |  | 14,522 |  |  |  | 50 |  |  |  | — |  |  |  | 14,572 |
Total marketable securities, current |  | $ | 24,525 |  |  | $ | 53 |  |  | $ | — |  |  | $ | 24,578 |

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- Definition Tabular disclosure of marketable securities. This may consist of investments in certain debt and equity securities, short-term investments and other assets. + References No definition available. + Details
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