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v3.20.2

Accrued Expenses (Tables) | 6 Months Ended
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Jun. 30, 2020
Payables and Accruals [Abstract] |
Schedule of Accrued Expenses | Accrued expenses consist of the following (in thousands):
| June 30, |  | December 31,
| 2020 |  | 2019
Payroll and employee related expenses | $ | 2,112 |  |  | $ | 2,235 |
Collaboration and licensing | 1,350 |  |  | 1,050 |
Accrued patent fees | 492 |  |  | 487 |
Accrued external research and development costs | 4,247 |  |  | 4,379 |
Accrued professional and consulting services | 763 |  |  | 468 |
Accrued interest | 44 |  |  | 82 |
Issuance costs, December 2019 financing | — |  |  | 4,381 |
Other | 300 |  |  | 410 |
Accrued expenses | $ | 9,308 |  |  | $ | 13,492 |

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