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Marketable Securities (Tables) | 3 Months Ended
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Mar. 31, 2024
Marketable Securities [Abstract] |
Summary of Available-for-Sale Securities and Gross Unrealized Losses | The following tables summarize the Company's marketable securities accounted for as available-for-sale securities (in thousands, except years):
| March 31, 2024 |
| Maturity (in years) | Amortized cost |  |  | Unrealized gains |  |  | Unrealized losses |  |  | Estimated fair value |
U.S. Treasury securities | 1 or less | $ | 63,024 |  |  | $ | 33 |  |  | $ | — |  |  | $ | 63,057 |
U.S. government agency securities | 1 or less |  | 36,588 |  |  |  | 16 |  |  |  | (23 | ) |  |  | 36,581 |
U.S. Treasury securities | 1-2 |  | 21,998 |  |  |  | 17 |  |  |  | (53 | ) |  |  | 21,962 |
U.S. government agency securities | 1-2 |  | 6,492 |  |  |  | 4 |  |  |  | — |  |  |  | 6,496 |
Total |  | $ | 128,102 |  |  | $ | 70 |  |  | $ | (76 | ) |  | $ | 128,096 |
| December 31, 2023 |
| Maturity (in years) | Amortized cost |  |  | Unrealized gains |  |  | Unrealized losses |  |  | Estimated fair value |
U.S. Treasury securities | 1 or less | $ | 76,481 |  |  | $ | 153 |  |  | $ | — |  |  | $ | 76,634 |
U.S. government agency securities | 1 or less |  | 37,376 |  |  |  | 38 |  |  |  | (3 | ) |  |  | 37,411 |
U.S. Treasury securities | 1-2 |  | 18,846 |  |  |  | 118 |  |  |  | — |  |  |  | 18,964 |
U.S. government agency securities | 1-2 |  | 12,379 |  |  |  | 75 |  |  |  | — |  |  |  | 12,454 |
Total |  | $ | 145,082 |  |  | $ | 384 |  |  | $ | (3 | ) |  | $ | 145,463 |
| March 31, 2024 |
| Unrealized losses less than 12 months |  |  | Unrealized losses 12 months or greater |  |  | Total |
| Fair value |  |  | Unrealized losses |  |  | Fair value |  |  | Unrealized losses |  |  | Fair value |  |  | Unrealized losses |
U.S. Treasury securities | $ | 12,204 |  |  | $ | (53 | ) |  | $ | — |  |  | $ | — |  |  | $ | 12,204 |  |  | $ | (53 | )
U.S. government agency securities | $ | 16,805 |  |  | $ | (23 | ) |  | $ | — |  |  | $ | — |  |  | $ | 16,805 |  |  | $ | (23 | )
Total | $ | 29,009 |  |  | $ | (76 | ) |  | $ | — |  |  | $ | — |  |  | $ | 29,009 |  |  | $ | (76 | )
| December 31, 2023 |
| Unrealized losses less than 12 months |  |  | Unrealized losses 12 months or greater |  |  | Total |
| Fair value |  |  | Unrealized losses |  |  | Fair value |  |  | Unrealized losses |  |  | Fair value |  |  | Unrealized losses |
U.S. government agency securities | $ | 9,939 |  |  | $ | (3 | ) |  | $ | — |  |  | $ | — |  |  | $ | 9,939 |  |  | $ | (3 | )
Total | $ | 9,939 |  |  | $ | (3 | ) |  | $ | — |  |  | $ | — |  |  | $ | 9,939 |  |  | $ | (3 | )

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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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