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Accrued Expenses (Tables) | 12 Months Ended
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Dec. 31, 2022
Accrued Expenses |
Schedule of accrued expenses | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | December 31, |  | December 31,
​ | ​ | 2022 | ​ | 2021
​ | ​ | (In thousands)
Accrued payroll and employee benefits | ​ | $ | 7,526 | ​ | $ | 7,968
Accrued research and development contract costs | ​ | ​ | 4,223 | ​ | ​ | 2,871
Accrued professional fees | ​ | ​ | 766 | ​ | ​ | 878
Other accrued expenses | ​ | ​ | 320 | ​ | ​ | 283
​ | ​ | $ | 12,835 | ​ | $ | 12,000

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