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Accrued Liabilities
 3 Months Ended
Mar. 31, 2022
Other Liabilities Disclosure [Abstract]  
Accrued Liabilities Accrued Liabilities
Accrued liabilities consisted of the following:
(in thousands)March 31, 2022December 31, 2021
Compensation and related costs$1,681 $3,260 
Chemistry, manufacturing and controls costs1,557 2,232 
Professional and legal fees765 644 
License fees188 — 
Other395 203 
Total$4,586 $6,339