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Accrued Liabilities
6 Months Ended
Jun. 30, 2023
Payables and Accruals [Abstract]  
Accrued Liabilities
Note 7. Accrued Liabilities
Accrued expenses consisted of the following:
(in thousands)June 30,
2023
December 31,
2022
Legal and other professional services$3,204 $3,128 
Compensation expense1,897 3,584 
Research and development projects1,532 981 
Other accrued liabilities152 333 
Total$6,785 $8,026