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Net income per ordinary share (Details) - shares | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Net income per ordinary share |  |  |
Weighted average number of ordinary shares for the purposes of basic and diluted net income per share | 7,726,118 | 7,732,132 | 7,732,132

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Balance Type: | na
Period Type: | duration

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