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Marketable Debt Securities (Tables) | 6 Months Ended
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Jun. 30, 2024
Investments, Debt and Equity Securities [Abstract] |
Summary of Marketable Securities Classified as Available-for-sale | Marketable debt securities, all of which were classified as available-for-sale, consist of the following (in thousands):
|  | June 30, 2024 |
|  | Amortized Cost |  |  | Unrealized Gains |  |  | Unrealized Losses |  |  | Aggregate Fair Value |
Marketable debt securities |  |  |  |  |  |  |  |  |  |  |  |
U.S. Treasury securities |  | $ | 130,756 |  |  | $ | - |  |  | $ | (106 | ) |  | $ | 130,650 |
|  | December 31, 2023 |
|  | Amortized Cost |  |  | Unrealized Gains |  |  | Unrealized Losses |  |  | Aggregate Fair Value |
Marketable debt securities |  |  |  |  |  |  |  |  |  |  |  |
U.S. Treasury securities |  | $ | 109,571 |  |  | $ | 71 |  |  | $ | (8 | ) |  | $ | 109,634 |
Interest and Investment Income | Interest and investment income consists of the following (in thousands):
| Three Months Ended June 30, |  |  | Six Months Ended June 30, |
| 2024 |  |  | 2023 |  |  | 2024 |  |  | 2023 |
Interest income | $ | 387 |  |  | $ | 396 |  |  | $ | 649 |  |  | $ | 1,462 |
Accretion of discount, net |  | 1,636 |  |  |  | 1,260 |  |  |  | 2,924 |  |  |  | 1,867 |
Total interest and investment income | $ | 2,023 |  |  | $ | 1,656 |  |  | $ | 3,573 |  |  | $ | 3,329 |

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