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Accrued Liabilities and Other Liabilities (Tables)
3 Months Ended
Mar. 31, 2022
Payables and Accruals [Abstract]  
Schedule of Accounts Payable and Accrued Liabilities
Accrued liabilities consisted of the following (in thousands):
March 31,December 31,
 20222021
Accrued clinical expense$30,411 $29,038 
Accrued manufacturing expense33,318 34,153 
Accrued development expense7,282 10,910 
Accrued compensation and benefits15,559 25,845 
Other accrued expenses9,063 8,549 
$95,633 $108,495