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Related party (Details) - USD ($) $ in Thousands | 9 Months Ended |
--- | --- | ---
Sep. 30, 2023 | Dec. 31, 2022
Related Party Transaction [Line Items] |  |
Unsecured promissory notes, outstanding | $ 105 | $ 420
Short-swing profit settlement | 244 |
Affiliated Entity |  |
Related Party Transaction [Line Items] |  |
Unsecured promissory notes, maximum |  | $ 1,000
Unsecured promissory notes, amount drawn | 400 |
Unsecured promissory notes, outstanding | 100 |
Shareholder |  |
Related Party Transaction [Line Items] |  |
Short-swing profit settlement | $ 200 |

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