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Short-Term Investments (Tables) | 3 Months Ended
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Mar. 31, 2025
Short-Term Investments |
Schedule of short-term investments | The following tables summarize short-term investments (in thousands): ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | ​ | ​ |  | Gross Unrealized |  | Gross Unrealized |  | ​ | ​
​ | ​ | Amortized Cost | ​ | Gains | ​ | Losses | ​ | Fair Value
March 31, 2025 | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Treasury notes | ​ | $ | 109,318 | ​ | $ | 49 | ​ | $ | (2) | ​ | $ | 109,365
Reverse repurchase agreements | ​ | ​ | 90,000 | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 90,000
Treasury bills | ​ | ​ | 39,147 | ​ | ​ | 16 | ​ | ​ | (2) | ​ | ​ | 39,161
Corporate debt securities | ​ | ​ | 2,154 | ​ | ​ | — | ​ | ​ | (1) | ​ | ​ | 2,153
Total | ​ | $ | 240,619 | ​ | $ | 65 | ​ | $ | (5) | ​ | $ | 240,679
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | Gross Unrealized | ​ | Gross Unrealized | ​ | ​ | ​
​ |  | Amortized Cost |  | Gains |  | Losses |  | Fair Value
December 31, 2024 | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Treasury notes | ​ | $ | 129,064 | ​ | $ | 136 | ​ | $ | (3) | ​ | $ | 129,197
Reverse repurchase agreements | ​ | ​ | 100,000 | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 100,000
Treasury bills | ​ | ​ | 39,085 | ​ | ​ | 31 | ​ | ​ | (1) | ​ | ​ | 39,115
Total | ​ | $ | 268,149 | ​ | $ | 167 | ​ | $ | (4) | ​ | $ | 268,312
​

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