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Accrued Expenses (Tables) | 6 Months Ended
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Jun. 30, 2022
Accrued Expenses |
Schedule of accrued expenses | Accrued expenses consisted of the following (in thousands): ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | June 30, | ​ | December 31,
​ |  | 2022 |  | 2021
Accrued compensation | ​ | $ | 1,407 | ​ | $ | 1,958
Accrued contracted costs | ​ | ​ | 1,349 | ​ | ​ | 760
Accrued professional fees | ​ | ​ | 604 | ​ | ​ | 268
Accrued other | ​ | ​ | 297 | ​ | ​ | 295
Total | ​ | $ | 3,657 | ​ | $ | 3,281

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