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Non-current assets held for sale - Additional Information (Details) $ in Thousands, $ in Thousands		1 Months Ended		12 Months Ended
	Dec. 21, 2023	Dec. 31, 2024 TWD ($)	May 31, 2024 TWD ($)	Dec. 31, 2024 TWD ($)	Dec. 31, 2024 USD ($)
Disclosure of subsidiaries [line items]
Gain on disposal				$ 72,261	$ 2,204
Consideration amount received				$ 4,394,206	$ 134,011
Unimos Shanghai [member]
Disclosure of subsidiaries [line items]
Percentage of owned equity investment approved to sell	45.0242%
Gain on disposal			$ 72,261
Consideration amount received		$ 4,394,206

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- Definition

Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table.

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No definition available.

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- Definition

The gain (loss) recognised on the measurement to fair value less costs to sell or on the disposal of the assets or disposal group(s) constituting the discontinued operation. [Refer: Discontinued operations [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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The cash inflow from the disposal of non-current assets or disposal groups classified as held for sale and discontinued operations. [Refer: Discontinued operations [member]; Disposal groups classified as held for sale [member]; Non-current assets or disposal groups classified as held for sale]

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The proportion of ownership interest in an associate attributable to the entity. [Refer: Total for all associates [member]]

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