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Share Capital and Share Premium - Authorised share capital (Details) - USD ($)
$ / shares in Units, $ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Disclosure of classes of share capital [line items]      
Par value per share $ 0.004    
Value Of Shares Authorised $ 2,200 $ 2,200 $ 2,200
Common Shares [member]      
Disclosure of classes of share capital [line items]      
Number of shares authorised     500,000,000
Par value per share $ 0.004   $ 0.004
Value Of Shares Authorised $ 2,000 2,000 $ 2,000
Class B Common Shares [member]      
Disclosure of classes of share capital [line items]      
Number of shares authorised     100,000,000
Par value per share     $ 0.001
Value Of Shares Authorised 100 100 $ 100
Preferred shares [member]      
Disclosure of classes of share capital [line items]      
Number of shares authorised     100,000,000
Par value per share     $ 0.001
Value Of Shares Authorised $ 100 $ 100 $ 100