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Accrued Expenses | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2023 | Dec. 31, 2022
Payables and Accruals [Abstract] |  |
Accrued Expenses | 6. Accrued expenses Accrued expenses consist of the following:
|  | March 31, 2023 |  |  | December 31, 2022 |
Payroll and employee related expenses |  | $ | 3,831 |  |  | $ | 4,216 |
Professional fees |  |  | 550 |  |  |  | 377 |
Third-party research and development expenses |  |  | 457 |  |  |  | 773 |
Other |  |  | 729 |  |  |  | 525 |
Total |  | $ | 5,567 |  |  | $ | 5,891 |
| 6. Accrued expenses Accrued expenses consist of the following:
|  | December 31, 2022 |  |  | December 31, 2021 |
Payroll and employee related expenses |  | $ | 4,216 |  |  | $ | 4,375 |
Professional fees |  |  | 377 |  |  |  | 767 |
Third-party research and development expenses |  |  | 773 |  |  |  | 840 |
Other |  |  | 525 |  |  |  | 119 |
Total |  | $ | 5,891 |  |  | $ | 6,101 |

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