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Collaborative Arrangements and Licensing Agreements, AstraZeneca (Details)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2020
USD ($)
Agreement
Jun. 30, 2020
USD ($)
Mar. 31, 2020
USD ($)
Sep. 30, 2019
USD ($)
Sep. 30, 2020
USD ($)
Agreement
Sep. 30, 2019
USD ($)
Dec. 31, 2019
USD ($)
Collaborative Arrangement and Licensing Agreement [Abstract]              
Revenue $ 160,079     $ 167,892 $ 438,983 $ 628,918  
R&D Revenue [Member]              
Collaborative Arrangement and Licensing Agreement [Abstract]              
Revenue $ 64,739     $ 72,193 $ 169,948 $ 376,833  
AstraZeneca [Member]              
Collaborative Arrangement and Licensing Agreement [Abstract]              
Number of collaboration agreements | Agreement 2       2    
Cumulative payments received $ 330,000       $ 330,000    
Deferred revenue $ 13,800       $ 13,800   $ 25,000
AstraZeneca [Member] | Revenue [Member] | Strategic Partner [Member]              
Collaborative Arrangement and Licensing Agreement [Abstract]              
Concentration percentage 2.00%     4.00% 8.00% 2.00%  
AstraZeneca [Member] | R&D Revenue [Member]              
Collaborative Arrangement and Licensing Agreement [Abstract]              
Revenue $ 3,800     $ 6,600 $ 34,300 $ 14,300  
Cardiovascular, Renal and Metabolic Diseases [Member]              
Collaborative Arrangement and Licensing Agreement [Abstract]              
Number of collaboration agreements | Agreement 1       1    
Milestone payment achieved     $ 10,000        
Cardiovascular, Renal and Metabolic Diseases [Member] | Maximum [Member]              
Collaborative Arrangement and Licensing Agreement [Abstract]              
Next prospective payment $ 30,000       $ 30,000    
Cardiovascular, Renal and Metabolic Diseases [Member] | R&D Revenue [Member]              
Collaborative Arrangement and Licensing Agreement [Abstract]              
Revenue     $ 10,000        
Oncology [Member]              
Collaborative Arrangement and Licensing Agreement [Abstract]              
Number of collaboration agreements | Agreement 1       1    
Next prospective payment $ 12,000       $ 12,000    
Oncology [Member] | R&D Revenue [Member]              
Collaborative Arrangement and Licensing Agreement [Abstract]              
Revenue   $ 13,000