Annual report pursuant to Section 13 and 15(d)

Summary of Significant Accounting Policies - Leases (Details)

v3.22.4
Summary of Significant Accounting Policies - Leases (Details)
1 Months Ended
Jul. 31, 2015
Aug. 31, 2021
Sep. 30, 2015
Lease term (in years) 15 years    
Lease for Offices and Research facilities in Philadelphia, U.S.      
Early termination option (in months) 123 months    
Lease for Research and development facility in Oxfordshire, U.K.      
Lease term (in years)     25 years
Lease of Building at Milton Park, Oxfordshire, United Kingdom      
Lease term (in years)   2 years