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License Agreements - Innovent (Details) - Innovent - USD ($)
$ in Millions
1 Months Ended 3 Months Ended 9 Months Ended
Jun. 30, 2021
Apr. 30, 2020
Jan. 31, 2019
Dec. 31, 2018
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Dec. 31, 2020
License agreements                  
Upfront and immediate milestone payment to be received under license agreement     $ 40.0            
Research and development expenses reimbursed         $ 0.0 $ 1.7 $ 2.3 $ 4.3  
Reimbursable costs included in accounts receivable         $ 2.4   $ 2.4   $ 1.2
Regulatory Milestones                  
License agreements                  
Amount recognized and received for the achievement of a predefined milestone $ 10.0                
Regulatory Milestones | PEMAZYRE                  
License agreements                  
Amount recognized and received for the achievement of a predefined milestone   $ 5.0              
Development and Regulatory Milestones | Maximum                  
License agreements                  
Upfront and immediate milestone payment to be received under license agreement       $ 94.0          
Sales and Commercial Milestones | Maximum                  
License agreements                  
Upfront and immediate milestone payment to be received under license agreement       $ 202.5