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Share-based Compensation - Weighted Average Fair Value of Options Granted (Details) - $ / shares
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
2019 ISOP    
Disclosure Of Terms And Conditions Of Sharebased Payment Arrangement [Line Items]    
Weighted average fair value of options granted $ 2.12 $ 1.75
2021 EIP    
Disclosure Of Terms And Conditions Of Sharebased Payment Arrangement [Line Items]    
Weighted average fair value of options granted $ 9.87