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Share-based Compensation - Movements in Share-based Compensation Reserve (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Disclosure Of Terms And Conditions Of Sharebased Payment Arrangement [Abstract]      
Beginning balance $ 2,948 $ 1,589  
Share-based compensation 8,514 1,359 $ 717
Ending balance $ 11,462 $ 2,948 $ 1,589