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Accrued Expenses | 12 Months Ended
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Dec. 31, 2021
Accrued Expenses |
Accrued Expenses | 6. Accrued Expenses At December 31, 2021 and 2020, accrued expenses consist of the following (in thousands):
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | As of
​ | ​ | December 31, |  | December 31,
​ |  | 2021 | ​ | 2020
Accrued external research and development expense | ​ | $ | 8,428 | ​ | $ | 5,387
Accrued payroll and related expenses | ​ | ​ | 7,147 | ​ | ​ | 6,663
Accrued professional and consulting expense | ​ | ​ | 1,421 | ​ | ​ | 1,141
Accrued other | ​ | ​ | 436 | ​ | ​ | 476
Accrued payable for property and equipment | ​ |  | 24 | ​ |  | 1,291
​ | ​ | $ | 17,456 | ​ | $ | 14,958
​

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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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