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Non-current assets held for sale - Summary of Assets Held for Sale (Details)
$ in Thousands
Dec. 31, 2023
TWD ($)
Disclosure of subsidiaries [line items]  
Investment accounted for using equity method in Unimos Shanghai $ 4,278,658
Unimos Shanghai [member]  
Disclosure of subsidiaries [line items]  
Investment accounted for using equity method in Unimos Shanghai $ 4,278,658