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Accrued Expenses (Tables) | 12 Months Ended
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Dec. 31, 2021
Accrued Expenses |
Schedule of accrued expenses | ​ Accrued expenses consisted of the following (in thousands): ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31, | ​ | December 31,
​ |  | 2021 |  | 2020
Accrued compensation | ​ | $ | 1,958 | ​ | $ | 1,719
Accrued contracted costs | ​ | ​ | 760 | ​ | ​ | 1,726
Accrued other | ​ |  | 295 | ​ |  | —
Accrued professional fees | ​ |  | 268 | ​ |  | 356
Accrued severance | ​ | ​ | — | ​ | ​ | 396
Total | ​ | $ | 3,281 | ​ | $ | 4,197

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