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Transactions with Related Parties - Compensation to the Company's Non-Executive Directors (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Disclosure of transactions between related parties [line items]      
Share-based payments (Note 12) $ 40 $ 40 $ 40
Non-Executive Directors [member]      
Disclosure of transactions between related parties [line items]      
Directors’ remuneration 145 143 147
Share-based payments (Note 12) 40 40 40
Total $ 185 $ 183 $ 187