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License Revenue - Disaggregation of Revenue (Details) - License revenue - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2022
Sep. 30, 2021
Disaggregation of Revenue [Line Items]        
Total license revenue $ 2,369 $ 0 $ 2,369 $ 1,507
United Kingdom        
Disaggregation of Revenue [Line Items]        
Total license revenue 60 0 60 0
United States        
Disaggregation of Revenue [Line Items]        
Total license revenue $ 2,309 $ 0 $ 2,309 $ 1,507