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v3.22.1

Profit Before Income Tax - Additional Information (Detail) $ in Thousands, $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2021 TWD ($) | Dec. 31, 2021 USD ($) | Dec. 31, 2020 TWD ($) | Dec. 31, 2020 USD ($)
Analysis of income and expense [Line Items] |  |  |  |
Percentage of employees' compensation | 0.19% | 0.19% | 0.20% | 0.20%
Percentage of remuneration to directors | 0.30% | 0.30% | 0.40% | 0.40%
Difference Between Employee Compensation Benefits And Director Remuneration Adjusted In Net Profit | $ 818 | $ 29 | $ 3 | $ 29
Bottom of range [member] |  |  |  |
Analysis of income and expense [Line Items] |  |  |  |
Percentage of employees' compensation | 0.01% | 0.01% |  |
Top of range [member] |  |  |  |
Analysis of income and expense [Line Items] |  |  |  |
Percentage of employees' compensation | 1.00% | 1.00% |  |
Percentage of remuneration to directors | 0.75% | 0.75% |  |

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