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Share capital - Common shares (Details) - USD ($) $ / shares in Units, $ in Thousands | Jan. 16, 2024 | Jan. 02, 2024 | Dec. 31, 2023 | Sep. 06, 2023 | Dec. 31, 2022
--- | --- | --- | --- | --- | ---
Share capital |  |  |  |  |
Common shares issued |  |  | 21,370,565 |  | 20,879,497
Common shares, par value |  |  | $ 0 |  |
Common shares issued and outstanding |  |  | $ 217,393 |  | $ 205,825
At the market equity program |  |  |  |  |
Share capital |  |  |  |  |
Securities dealers of common shares |  |  |  | $ 30,000 |
At the market equity program | Major ordinary share transactions |  |  |  |  |
Share capital |  |  |  |  |
Number of units issued |  | 2,666,667 |  |  |
Offering price per unit |  | $ 7.50 |  |  |
Gross proceeds |  | $ 20,000 |  |  |
Net of transaction costs |  | $ 18,238 |  |  |
Non-brokered private placement | Major ordinary share transactions |  |  |  |  |
Share capital |  |  |  |  |
Number of units issued | 391,667 |  |  |  |
Offering price per unit | $ 7.50 |  |  |  |
Gross proceeds | $ 2,938 |  |  |  |
Net of transaction costs | $ 2,841 |  |  |  |

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