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Accrued Expenses and Other Liabilities | 3 Months Ended
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Mar. 31, 2021
Payables and Accruals [Abstract] |
Accrued Expenses and Other Liabilities | Accrued Expenses and Other Liabilities Accrued expenses and other liabilities consisted of the following (in thousands):
| March 31, 2021 |  | December 31, 2020
Compensation and benefits | $ | 8,695 |  |  | $ | 8,732 |
Research and development costs | 11,468 |  |  | 15,343 |
UCLB milestone and option | 206 |  |  | 205 |
Professional fees | 3,311 |  |  | 3,005 |
U.S. corporate income and local taxes | 429 |  |  | — |
Other liabilities | 574 |  |  | 496 |
Total accrued expenses and other liabilities | $ | 24,683 |  |  | $ | 27,781 |

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- Definition The entire disclosure for accounts payable and accrued liabilities at the end of the reporting period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(a),20,24) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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