Quarterly report pursuant to Section 13 or 15(d)

Collaboration and Stock Purchase Agreements (Details)

v3.20.2
Collaboration and Stock Purchase Agreements (Details) - USD ($)
$ in Millions
1 Months Ended 9 Months Ended
Dec. 31, 2019
Feb. 08, 2019
Jan. 31, 2019
Jan. 30, 2019
Sep. 30, 2020
Nov. 12, 2018
Business Acquisition, Percentage of Voting Interests Acquired           33.30%
Business Combination, Contingent Consideration, Liability           $ 180.0
Caelum [Member]            
Sale of Stock Percentage of Shares Transferred on Transaction       19.90%    
Sale of Stock, Consideration Received on Transaction       $ 30.0    
Alexion [Member]            
Potential Additional Payments, Maximum     $ 500.0      
Alexion [Member] | Caelum [Member]            
Initial contingent payments $ 30.0          
Additional upfront funding 20.0          
Funding for additional equity interest $ 60.0          
Sales [Member] | Avenue [Member]            
Net sales threshold         $ 325.0  
Sales After January 1. 2029 [Member] | Avenue [Member]            
Gross Profit Percentage To Net Sales         20.00%  
Contingent Earn Out Payments Measurement Second Model         $ 1,500.0  
Slab One [Member] | Avenue [Member]            
Gross Profit Percentage To Net Sales         10.00%  
Slab One [Member] | Sales [Member] | Avenue [Member]            
Net sales threshold         $ 400.0  
Slab One [Member] | Sales After January 1. 2029 [Member] | Avenue [Member]            
Net sales threshold         $ 100.0  
Slab Two [Member] | Avenue [Member]            
Gross Profit Percentage To Net Sales         12.50%  
Slab Two [Member] | Sales [Member] | Avenue [Member] | Minimum [Member]            
Net sales threshold         $ 400.0  
Slab Two [Member] | Sales [Member] | Avenue [Member] | Maximum [Member]            
Net sales threshold         $ 500.0  
Slab Three [Member] | Avenue [Member]            
Gross Profit Percentage To Net Sales         15.00%  
Slab Three [Member] | Sales [Member] | Avenue [Member]            
Net sales threshold         $ 500.0  
SPMA [Member]            
Business Combination, Consideration Transferred   $ 7.0        
First Stage [Member] | SPMA [Member]            
Business Combination, Consideration Transferred   $ 31.5