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Accounts Payable and Accrued Liabilities
12 Months Ended
Dec. 31, 2020
Payables and Accruals [Abstract]  
Accounts Payable and Accrued Liabilities Accounts Payable and Accrued Liabilities
The following is a summary of the Company’s accounts payable and accrued liabilities as of December 31, 2020 and 2019:
(in thousands)December 31, 2020December 31, 2019
Compensation and employee benefits$10,951 $6,597 
Research and development expenses6,173 5,893 
Royalties payable5,817 5,904 
Consulting and other professional fees5,052 5,376 
Operating lease liabilities2,117 2,147 
Milestone obligations under license agreements350 — 
Other1,049 1,673 
Total accounts payable and accrued liabilities$31,509 $27,590