Annual report pursuant to Section 13 and 15(d)

Geographic information - Major Customers (Details)

v3.20.4
Geographic information - Major Customers (Details) - Revenues - Customer Concentration Risk
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Astellas Pharma Inc.    
Major Customers    
Concentration risk (as a percentage) 52.00%  
GlaxoSmithKline Intellectual Property Development Ltd    
Major Customers    
Concentration risk (as a percentage) 48.00% 100.00%