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Long-Term Investments (Tables) | 6 Months Ended
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Jun. 30, 2024
Long-Term Investments |
Schedule of carrying value of non-marketable equity investments | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | June 30, | ​ | December 31, | ​
​ | ​ | 2024 |  | 2023 | ​
Investments in SYNAPS Dx |  | $ | 512 | ​ | $ | 512 | ​
Total long-term investments | ​ | $ | 512 | ​ | $ | 512 | ​

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