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Collaboration Agreements And Business Development Activities (Tables)
12 Months Ended
Dec. 31, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]  
Schedule of Collaborative Revenues Under Collaboration Agreement
Revenues under the collaboration agreement with Ipsen were as follows (in thousands):
 Year Ended December 31,
 202120202019
License revenues$207,982 $93,495 $117,360 
Collaboration services revenues94,091 58,136 35,411 
Total$302,073 $151,631 $152,771 
Collaboration services revenues under the collaboration agreement with Takeda were as follows (in thousands):
 Year Ended December 31,
 202120202019
License revenues$26,058 $61,115 $18,112 
Collaboration services revenues13,667 20,557 6,510 
Total collaboration revenues$39,725 $81,672 $24,622