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Others - Capital management , schedule of gearing ratios (Details) $ in Thousands	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)
Others
Total liabilities	$ 30,957	$ 28,309
Total equity	$ 139,406	$ 181,964	$ (190,442)	$ (35,743)
Gearing ratio	0.22	0.16

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- Definition

The amount of residual interest in the assets of the entity after deducting all its liabilities.

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- Definition

The amount of a present obligation of the entity to transfer an economic resource as a result of past events. Economic resource is a right that has the potential to produce economic benefits.

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