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Accrued and Other Current Liabilities (Details) - USD ($)
$ in Thousands
Dec. 31, 2023
Dec. 31, 2022
Accrued and other current liabilities:    
Other accrued expenses $ 2,686 $ 342
Accrued employee expenses 835 923
Accrued research and development expenses 1,112 974
Professional services 81 2,616
Total accrued and other current liabilities $ 4,714 $ 4,855