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Collaborative Arrangements and Licensing Agreements, AstraZeneca (Details)
$ in Thousands
12 Months Ended
Dec. 31, 2023
USD ($)
Dec. 31, 2022
USD ($)
Dec. 31, 2021
USD ($)
Component
PerformanceObligation
Dec. 31, 2015
USD ($)
Jul. 31, 2015
USD ($)
PerformanceObligation
Collaborative Arrangement and Licensing Agreement [Abstract]          
Revenue $ 787,647 $ 587,367 $ 810,456    
AstraZeneca [Member]          
Collaborative Arrangement and Licensing Agreement [Abstract]          
Revenue 202,236 79,160 $ 254,591    
Deferred revenue $ 0 $ 0      
AstraZeneca [Member] | Revenue [Member] | Strategic Partner [Member]          
Collaborative Arrangement and Licensing Agreement [Abstract]          
Concentration percentage 26.00% 13.00% 31.00%    
WAINUA (Eplontersen) [Member]          
Collaborative Arrangement and Licensing Agreement [Abstract]          
Maximum amount of payments receivable over term of collaboration $ 3,600,000        
Upfront payment received     $ 200,000    
Maximum amount of license fees over term of collaboration 20,000        
Maximum amount of development milestone payments over term of collaboration 485,000        
Maximum amount of sales milestone payments over term of collaboration $ 2,900,000        
Royalty percentage received on sales of medicine in U.S. 20.00%        
Number of material components | Component     4    
Number of separate performance obligations | PerformanceObligation     1    
Transaction price     $ 200,000    
Percentage of costs associated with ongoing global Phase 3 development program paid by AstraZeneca 55.00%        
Next payment to be achieved $ 30,000        
Revenue 20,000   $ 200,000    
WAINUA (Eplontersen) [Member] | Maximum [Member]          
Collaborative Arrangement and Licensing Agreement [Abstract]          
Cumulative payments received 360,000        
WAINUA (Eplontersen) [Member] | ATTRv-PN [Member]          
Collaborative Arrangement and Licensing Agreement [Abstract]          
Revenue 50,000        
Cardiovascular, Renal and Metabolic Diseases [Member]          
Collaborative Arrangement and Licensing Agreement [Abstract]          
Maximum amount of payments receivable over term of collaboration 3,400,000        
Upfront payment received       $ 65,000  
Maximum amount of license fees over term of collaboration 290,000        
Maximum amount of development milestone payments over term of collaboration 865,000        
Maximum amount of regulatory milestone payments over term of collaboration 2,200,000        
Number of separate performance obligations | PerformanceObligation         1
Transaction price         $ 65,000
Next payment to be achieved 10,000        
Cumulative payments included in transaction price for performance obligation 90,000        
Revenue 36,000        
Cardiovascular, Renal and Metabolic Diseases [Member] | Minimum [Member]          
Collaborative Arrangement and Licensing Agreement [Abstract]          
Cumulative payments received $ 300,000