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Accrued Expenses and Other Liabilities
 12 Months Ended
Dec. 31, 2022
Other Liabilities Disclosure [Abstract]  
Accrued Expenses and Other Liabilities Accrued Expenses and Other Liabilities
Accrued expenses and other liabilities consisted of the following (in thousands):
December 31,
20222021
Accrued research and development expense$1,684 $3,043 
Accrued professional expenses1,284 1,386 
Accrued compensation and benefit costs5,534 5,018 
Payroll tax payable167 593 
Other liabilities656 268 
$9,325 $10,308