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Collaboration Agreements And Business Development Activities (Tables)
 9 Months Ended
Sep. 29, 2023
Organization, Consolidation and Presentation of Financial Statements [Abstract]  
Schedule of Collaborative Revenues Under Collaboration and License Agreement
Revenues under the collaboration and license agreement, as amended, with Ipsen were as follows (in thousands):
Three Months Ended September 30,Nine Months Ended September 30,
2023202220232022
License revenues$34,777 $27,607 $98,607 $103,389 
Collaboration services revenues1,244 7,211 7,679 28,196 
Total collaboration revenues$36,021 $34,818 $106,286 $131,585 
Revenues under the collaboration and license agreement, as amended, with Takeda were as follows (in thousands):
Three Months Ended September 30,Nine Months Ended September 30,
2023202220232022
License revenues$2,974 $2,690 $17,185 $7,755 
Collaboration services revenues1,812 3,661 9,928 11,148 
Total collaboration revenues$4,786 $6,351 $27,113 $18,903