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Accrued expenses and other current liabilities (Tables) | 12 Months Ended
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Dec. 31, 2022
Accrued expenses and other current liabilities. |
Schedule of accrued expenses and other current liabilities | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | As of December 31, |
(in thousands) |  | 2022 |  |  | 2021 |
Research and development external project costs | $ | 5,399 | ​ | $ | 983 | ​
Personnel-related expenses | ​ | 1,903 | ​ |  | 161 | ​
Professional fees | ​ | 486 | ​ |  | 425 | ​
Other | ​ | 405 | ​ |  | 310 | ​
​ | $ | 8,193 | ​ | $ | 1,879 | ​

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