Details of Significant Accounts - Pensions, schedule of principal actuarial assumptions (Details) - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024
Discount rate
Disclosure of sensitivity analysis for actuarial assumptions [line items]
Percentage of increase in actuarial assumption	0.25%	0.25%
Percentage of decrease in actuarial assumption	0.25%	0.25%
Future salary increases
Disclosure of sensitivity analysis for actuarial assumptions [line items]
Percentage of increase in actuarial assumption	0.25%	0.25%
Percentage of decrease in actuarial assumption	0.25%	0.25%
Perfect Mobile Corp. (Taiwan)
Disclosure of sensitivity analysis for actuarial assumptions [line items]
Discount rate	1.55%	1.80%
Future salary increases	3.00%	3.00%
Perfect Mobile Corp. (Taiwan) \| Discount rate
Disclosure of sensitivity analysis for actuarial assumptions [line items]
Effect on present value of defined benefit obligation	$ (4)	$ (3)
Effect on present value of defined benefit obligation	5	4
Perfect Mobile Corp. (Taiwan) \| Future salary increases
Disclosure of sensitivity analysis for actuarial assumptions [line items]
Effect on present value of defined benefit obligation	5	4
Effect on present value of defined benefit obligation	$ (4)	$ (3)

The discount rate used as the significant actuarial assumption to determine the present value of a defined benefit obligation. [Refer: Defined benefit obligation, at present value; Actuarial assumptions [domain]]

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition

The expected rate of salary increases used as a significant actuarial assumption to determine the present value of a defined benefit obligation. [Refer: Defined benefit plans [domain]; Defined benefit obligation, at present value; Actuarial assumptions [domain]]

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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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- Definition

The increase (decrease) in a defined benefit obligation that would have been caused by a decrease in a significant actuarial assumption that was reasonably possible at the end of the reporting period. [Refer: Actuarial assumptions [domain]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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The increase (decrease) in a defined benefit obligation that would have been caused by an increase in a significant actuarial assumption that was reasonably possible at the end of the reporting period. [Refer: Actuarial assumptions [domain]]

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- Definition

The reasonably possible percentage of the decrease in the actuarial assumption used to determine the present value of defined benefit obligation. [Refer: Actuarial assumptions [domain]]

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The reasonably possible percentage of the increase in the actuarial assumption used to determine the present value of defined benefit obligation. [Refer: Actuarial assumptions [domain]]

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