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Marketable Debt Securities | 6 Months Ended
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Jun. 30, 2024
Investments, Debt and Equity Securities [Abstract] |
Marketable Debt Securities | 5. Marketable Debt Securities The Company’s investments in debt securities are carried at fair value and classified as current assets available-for-sale and represent the investment of funds available for current operations. Accretion of bond discount and interest income on marketable securities is included in other income as a separate component of other income (expense) on the statement of operations and comprehensive loss. Unrealized gains and losses on available-for-sale debt securities are included in other comprehensive income or loss, and charged to income or expense in the period when realized. The following tables summarize the gross unrealized gains and losses of the Company’s available-for-sale securities (in thousands):
|  | As of June 30, 2024 |
|  | Amortized Cost |  |  | Gross Unrealized Gains |  |  | Gross Unrealized Losses |  |  | Fair Market Value |
Available-for-sale securities: |  |  |  |  |  |  |  |  |  |  |  |
U.S. treasury securities |  | $ | 53,558 |  |  | $ | — |  |  | $ | (13 | ) |  | $ | 53,545 |
Total |  | $ | 53,558 |  |  | $ | — |  |  | $ | (13 | ) |  | $ | 53,545 |
|  | As of December 31, 2023 |
|  | Amortized Cost |  |  | Gross Unrealized Gains |  |  | Gross Unrealized Losses |  |  | Fair Market Value |
Available-for-sale securities: |  |  |  |  |  |  |  |  |  |  |  |
U.S. treasury securities |  | $ | 75,324 |  |  | $ | 8 |  |  | $ | (1 | ) |  | $ | 75,331 |
Total |  | $ | 75,324 |  |  | $ | 8 |  |  | $ | (1 | ) |  | $ | 75,331 |
As of June 30, 2024, the Company considered the unrealized losses in its investment portfolio to be temporary in nature and not due to credit losses. The Company has the intent and ability to hold such investments until their recovery at fair value. The Company did no t have any realized gains or losses in its available for sale securities during the three and six months ended June 30, 2024 and 2023.

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