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Other Accrued Liabilities
 12 Months Ended
Dec. 31, 2020
Payables and Accruals [Abstract]  
Other Accrued Liabilities Other Accrued Liabilities
Other accrued liabilities consist of the following:
December 31,
20202019
(in thousands)
Accrued compensation$15,161 $7,818 
Accrued professional fees3,183 3,842 
Accrued other6,446 211 
Total other accrued liabilities$24,790 $11,871