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Investments Accounted for Using the Equity Method - Summary of Investments in joint ventures Accounted for using the Equity Method (Detail) $ in Thousands, $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2022 TWD ($) | Dec. 31, 2021 TWD ($) | Dec. 31, 2022 USD ($)
Disclosure of joint ventures [line items] |  |  |
Carrying Amount | $ 515,351 | $ 495,930 | $ 16,770
SUMA-USI Electronics Co., Ltd [member] |  |  |
Disclosure of joint ventures [line items] |  |  |
Main Business | Engaged in the design and production of electronic products |  |
Operating Location | China |  |
Carrying Amount | $ 488,760 | $ 495,930 | 15,905
Percentages of ownership | 49.00% | 49.00% |
MUtek Electronics Co., Ltd. [Member] |  |  |
Disclosure of joint ventures [line items] |  |  |
Main Business | Engaged in the production and wholesale of electronic products |  |
Operating Location | R.O.C. |  |
Carrying Amount | $ 26,591 |  | 865
Percentages of ownership | 49.00% | 49.00% |
Joint ventures [member] |  |  |
Disclosure of joint ventures [line items] |  |  |
Carrying Amount | $ 515,351 | $ 495,930 | $ 16,770

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