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Short-Term Investments | 3 Months Ended
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Mar. 31, 2025
Investments, Debt and Equity Securities [Abstract] |
Short-Term Investments | Note 6. Short-Term Investments The following table provides amortized costs, gross unrealized gains and losses, and fair values for the Company’s investments in available-for-sale U.S. treasury securities as of March 31, 2025 and December 31, 2024, which have maturity dates that range from 0 month to 10 months and 0 month to 10 months, respectively. Fair value was determined using market prices obtained from third-party sources. Realized gains or losses were insignificant for the three months ended March 31, 2025 and 2024. ​
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March 31, 2025 | ​ | ​ | ​ | Gross | ​ | Gross | ​ | ​ | ​
(in thousands) | Amortized Cost |  | Unrealized Gains |  | Unrealized Losses |  | Fair Value
Short-term U.S. treasury securities | $ | 182,325 | ​ | $ | 148 | ​ | $ | (1) | ​ | $ | 182,472
Total | $ | 182,325 | ​ | $ | 148 | ​ | $ | (1) | ​ | $ | 182,472
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December 31, 2024 | ​ | ​ | ​ | Gross | ​ | Gross | ​ | ​ | ​
(in thousands) | Amortized Cost |  | Unrealized Gains |  | Unrealized Losses |  | Fair Value
Short-term U.S. treasury securities | $ | 132,615 | ​ | $ | 167 | ​ | $ | — | ​ | $ | 132,782
Total | $ | 132,615 | ​ | $ | 167 | ​ | $ | — | ​ | $ | 132,782
The Company has $1.2 million and $1.0 million marketable equity securities as of March 31, 2025 and December 31, 2024, respectively, with an initial cost of $0.5 million. Total unrealized gain of $0.7 million and $0.5 million is recorded under miscellaneous (expense) income, net in the consolidated statements of operations and comprehensive loss for the periods ended March 31, 2025 and December 31, 2024, respectively.

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