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Investments | 3 Months Ended
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Mar. 31, 2024
Investments, Debt and Equity Securities [Abstract] |
Investments | Investments The following table represents the Company’s available-for-sale investments by major security type (in thousands):
| March 31, 2024
| Amortized Cost |  | Gross Unrealized Loss |  | Total Fair Value
Investments: |  |  |  |  |
U.S. government securities | $ | 38,642 |  |  | $ | (14) |  |  | $ | 38,628 |
Cash equivalents: |  |  |  |  |
U.S. government securities | 34,245 |  |  | — |  |  | 34,245 |
Total level 1 debt securities | $ | 72,887 |  |  | $ | (14) |  |  | $ | 72,873 |
| December 31, 2023
| Amortized Cost |  | Gross Unrealized Gain/(Loss) |  | Total Fair Value
Investments: |  |  |  |  |
U.S. government securities | $ | 4,998 |  |  | $ | 1 |  |  | $ | 4,999 |
Cash equivalents: |  |  |  |  |
U.S. government securities | 39,657 |  |  | 3 |  |  | 39,660 |
Total level 1 debt securities | $ | 44,655 |  |  | $ | 4 |  |  | $ | 44,659 |
The Company’s investment instruments and cash and cash equivalents are classified using Level 1 inputs within the fair value hierarchy and are valued using quoted market prices, broker or dealer quotations, or alternative pricing sources with reasonable levels of price transparency. Debt securities have a weighted-average maturity of 0.19 years as of March 31, 2024.

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