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Accrued Expenses and Other Current Liabilities | 12 Months Ended
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Dec. 31, 2021
Payables and Accruals [Abstract] |
Accrued Expenses and Other Current Liabilities | 6. Accrued Expenses and Other Current Liabilities Accrued expenses and other current liabilities consisted of the following (in thousands):
|  | December 31, 2021 |  |  | December 31, 2020 |
Accrued external research and development expenses |  | $ | 6,315 |  |  | $ | 7,035 |
Accrued payroll and related expenses |  |  | 5,884 |  |  |  | 3,918 |
Accrued professional fees |  |  | 909 |  |  |  | 1,066 |
Accrued other |  |  | 1,242 |  |  |  | 222 |
|  | $ | 14,350 |  |  | $ | 12,241 |

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- Definition The entire disclosure for accounts payable, accrued expenses, and other liabilities that are classified as current at the end of the reporting period. + References No definition available. + Details
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