Registration statement for securities of certain foreign private issuers

Segment Information - Summary of Revenue from External Customers (Detail)

v3.21.2
Segment Information - Summary of Revenue from External Customers (Detail) - USD ($)
$ in Thousands
 6 Months Ended 12 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Dec. 31, 2020
Dec. 31, 2019
Disclosure Of Disaggregation Of Revenue Based On Geography [Line Items]        
Revenue From Contracts With Customers $ 128,771 $ 22,503 $ 79,272 $ 16,034
Revenue From External Customers [Member]        
Disclosure Of Disaggregation Of Revenue Based On Geography [Line Items]        
Revenue From Contracts With Customers 128,771 22,503 79,272 16,034
UK        
Disclosure Of Disaggregation Of Revenue Based On Geography [Line Items]        
Revenue From Contracts With Customers 56,616 19,302 44,000 14,633
UK | Revenue From External Customers [Member]        
Disclosure Of Disaggregation Of Revenue Based On Geography [Line Items]        
Revenue From Contracts With Customers 16,130 12,332 28,827 12,189
US        
Disclosure Of Disaggregation Of Revenue Based On Geography [Line Items]        
Revenue From Contracts With Customers 72,071 2,097 32,226 0
US | Revenue From External Customers [Member]        
Disclosure Of Disaggregation Of Revenue Based On Geography [Line Items]        
Revenue From Contracts With Customers 71,651 2,097 32,689 0
Asia-Pacific | Revenue From External Customers [Member]        
Disclosure Of Disaggregation Of Revenue Based On Geography [Line Items]        
Revenue From Contracts With Customers 7,548 5,095 11,585 2,215
Canada | Revenue From External Customers [Member]        
Disclosure Of Disaggregation Of Revenue Based On Geography [Line Items]        
Revenue From Contracts With Customers 32,937 1,328 3,207 564
Rest of World | Revenue From External Customers [Member]        
Disclosure Of Disaggregation Of Revenue Based On Geography [Line Items]        
Revenue From Contracts With Customers $ 505 $ 1,651 $ 2,964 $ 1,066