As of June 30, 2026 and December 31, 2025, the Company has the following investments in available-for-sale debt securities, which are categorized as marketable securities: available-for-sale debt securities on the balance sheet depending on their maturity at acquisition (in thousands): | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | June 30, 2026 | | | Remaining contractual maturity | | Amortized cost | | Gross unrealized gains | | Gross unrealized losses | | Aggregate estimated fair value | Marketable securities: available-for-sale debt securities: | | | | | | | | | | | Commercial paper | | within 1 year | | $ | 6,743 | | | $ | — | | | $ | — | | | $ | 6,743 | | | Corporate debt securities | | within 1 year | | 13,468 | | | 2 | | | (1) | | | 13,469 | | | | | | | | | | | | | United States Treasury Bills | | within 1 year | | 10,003 | | | 2 | | | (1) | | | 10,004 | | | | | | | | | | | | | | | | | | | | | | | | Total | | | | $ | 30,214 | | | $ | 4 | | | $ | (2) | | | $ | 30,216 | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | December 31, 2025 | | | Remaining contractual maturity | | Amortized cost | | Gross unrealized gains | | Gross unrealized losses | | Aggregate estimated fair value | Marketable securities: available-for-sale debt securities: | | | | | | | | | | | Commercial paper | | within 1 year | | $ | 52,569 | | | $ | 21 | | | $ | (1) | | | $ | 52,589 | | | Corporate debt securities | | within 1 year | | 58,226 | | | 74 | | | (1) | | | 58,299 | | United Kingdom Government Securities | | within 1 year | | 66,162 | | | 12 | | | — | | | 66,174 | | United States Treasury Bills | | within 1 year | | 19,466 | | | 50 | | | — | | | 19,516 | | | | | | | | | | | | | | | | | | | | | | | | Total | | | | $ | 196,423 | | | $ | 157 | | | $ | (2) | | | $ | 196,578 | |
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