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Related-party Transactions - Compensation of key management personnel (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Related-party Transactions      
Short-term employee benefits $ 1,068 $ 884 $ 822
Post-employment benefits 12 9 7
Share-based compensation 671 41 14
Total Key management personnel compensation $ 1,751 $ 934 $ 843