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Accrued Expenses | 6 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2025 | Dec. 31, 2024
Payables and Accruals [Abstract] |  |
Accrued Expenses |
(5) | Accrued Expenses
Accrued expenses consisted of the following (in thousands):
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | June 30, 2025 |  | December 31, 2024
Research and development | ​ | $ | 770 | ​ | $ | 1,845
Professional fees | ​ |  | 617 | ​ |  | 537
Compensation and related expenses | ​ |  | 1,043 | ​ |  | 4,879
Other | ​ |  | 98 | ​ |  | 187
​ | ​ | $ | 2,528 | ​ | $ | 7,448
​ | (7)Accrued Expenses Accrued expenses consisted of the following (in thousands):
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31,
​ |  | 2024 |  | 2023
Research and development | ​ | $ | 1,845 | ​ | $ | 3,131
Professional fees | ​ |  | 537 | ​ |  | 1,366
Compensation and related expenses | ​ |  | 4,879 | ​ |  | 3,100
Other | ​ |  | 187 | ​ |  | 65
​ | ​ | $ | 7,448 | ​ | $ | 7,662
​

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