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Accrued Expenses | 9 Months Ended
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Sep. 30, 2023
Accrued Liabilities, Current [Abstract] |
Accrued Expenses | Accrued Expenses Accrued expenses consisted of the following (in thousands):
| September 30, 2023 |  | December 31, 2022
External research and development expenses | $ | 17,135 |  |  | $ | 16,452 |
Employee related expenses | 9,536 |  |  | 10,140 |
Intellectual property and patent related fees | 1,385 |  |  | 1,809 |
Professional service expenses | 943 |  |  | 1,260 |
Other expenses | 1,279 |  |  | 1,635 |
Total accrued expenses | $ | 30,278 |  |  | $ | 31,296 |

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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 -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(a),20,24) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1 + Details
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