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Share capital, share premium and other capital reserves - Summary (Details) - USD ($) $ / shares in Units, $ in Thousands | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | --- | ---
Share capital, share premium and other capital reserves |  |  |
Authorized | 90,000,000 | 90,000,000 | 10,236,941
Issued and fully paid | 26,289,087 | 25,775,538 | 9,352,941
Additional paid-in capital | $ 194,424 | $ 192,270 |
Share premium |  |  | $ 41,088
Common share |  |  |
Share capital, share premium and other capital reserves |  |  |
Par value | $ 0.14 | $ 0.14 | $ 0.01
Authorized | 45,000,000 | 45,000,000 | 447,525
Issued and fully paid | 26,289,087 | 25,775,538 | 281,775
Additional paid-in capital | $ 194,424 | $ 192,270 |
Series A Preference Shares |  |  |
Share capital, share premium and other capital reserves |  |  |
Par value |  |  | $ 0.01
Authorized |  |  | 1,755,845
Issued and fully paid |  |  | 1,037,595
Share premium |  |  | $ 722
Series B Preference Shares |  |  |
Share capital, share premium and other capital reserves |  |  |
Par value |  |  | $ 0.01
Authorized |  |  | 3,899,766
Issued and fully paid |  |  | 3,899,766
Share premium |  |  | $ 18,340
Series C Preference Shares |  |  |
Share capital, share premium and other capital reserves |  |  |
Par value |  |  | $ 0.01
Authorized |  |  | 4,133,805
Issued and fully paid |  |  | 4,133,805
Share premium |  |  | $ 22,026
Preference share |  |  |
Share capital, share premium and other capital reserves |  |  |
Par value | $ 0.14 |  | $ 0.01
Authorized | 45,000,000 | 45,000,000 | 9,789,416
Issued and fully paid |  |  | 9,071,166
Share premium |  |  | $ 41,088

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