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Accrued Liabilities
9 Months Ended
Sep. 30, 2023
Other Liabilities Disclosure [Abstract]  
Accrued Liabilities Accrued LiabilitiesAccrued liabilities consisted of the following:
(in thousands)September 30, 2023December 31, 2022
Headcount related costs$3,157 $3,152 
Research and development costs3,329 1,727 
Professional and legal fees685 762 
Other54 38 
Total$7,225 $5,679