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Trade Receivables, Net - Transfer of Financial Asset (Detail) € in Thousands, $ in Thousands, $ in Thousands | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2021 EUR (€) | Dec. 31, 2021 TWD ($) | Dec. 31, 2020 EUR (€) | Dec. 31, 2020 USD ($) | Dec. 31, 2020 TWD ($) | Dec. 31, 2021 TWD ($) | Dec. 31, 2020 USD ($) | Dec. 31, 2020 TWD ($)
Receivables Factoring Proceeds [Member] | BNP Paribas [Member] |  |  |  |  |  |  |  |
Disclosure of transferred financial assets that are not derecognised in their entirety [line items] |  |  |  |  |  |  |  |
Assets that entity continues to recognise | € 12,115 |  | € 16,691 |  |  |  |  |
Receivables Factoring Proceeds [Member] | HSBC [Member] |  |  |  |  |  |  |  |
Disclosure of transferred financial assets that are not derecognised in their entirety [line items] |  |  |  |  |  |  |  |
Assets that entity continues to recognise |  |  | 6,773 |  |  |  |  |
Receivables Factoring Proceeds [Member] | Citi Bank Taiwan Limited [Member] |  |  |  |  |  |  |  |
Disclosure of transferred financial assets that are not derecognised in their entirety [line items] |  |  |  |  |  |  |  |
Assets that entity continues to recognise | $ |  |  |  |  |  |  | $ 94,471 |
Receivables Factoring Proceeds [Member] | Standard Chartered Bank [Member] |  |  |  |  |  |  |  |
Disclosure of transferred financial assets that are not derecognised in their entirety [line items] |  |  |  |  |  |  |  |
Assets that entity continues to recognise | $ |  |  |  |  |  |  | $ 53,800 |
Receivables Factoring Proceeds [Member] | First Commercial Bank [Member] |  |  |  |  |  |  |  |
Disclosure of transferred financial assets that are not derecognised in their entirety [line items] |  |  |  |  |  |  |  |
Assets that entity continues to recognise | $ |  |  |  |  |  | $ 8,565 |  | $ 6,879
Reclassified to Other Receivables [Member] | BNP Paribas [Member] |  |  |  |  |  |  |  |
Disclosure of transferred financial assets that are not derecognised in their entirety [line items] |  |  |  |  |  |  |  |
Transferred to other receivables | 12,081 |  | 15,315 |  |  |  |  |
Reclassified to Other Receivables [Member] | HSBC [Member] |  |  |  |  |  |  |  |
Disclosure of transferred financial assets that are not derecognised in their entirety [line items] |  |  |  |  |  |  |  |
Transferred to other receivables |  |  | 6,456 |  |  |  |  |
Advances Received But Unused [Member] | BNP Paribas [Member] |  |  |  |  |  |  |  |
Disclosure of transferred financial assets that are not derecognised in their entirety [line items] |  |  |  |  |  |  |  |
Advances received | 11,475 |  | 14,481 |  |  |  |  |
Advances Received But Unused [Member] | HSBC [Member] |  |  |  |  |  |  |  |
Disclosure of transferred financial assets that are not derecognised in their entirety [line items] |  |  |  |  |  |  |  |
Advances received | € 34 |  | 5,779 |  |  |  |  |
Advances Received Used [Member] | BNP Paribas [Member] |  |  |  |  |  |  |  |
Disclosure of transferred financial assets that are not derecognised in their entirety [line items] |  |  |  |  |  |  |  |
Advances received |  |  | 1,376 |  |  |  |  |
Advances Received Used [Member] | HSBC [Member] |  |  |  |  |  |  |  |
Disclosure of transferred financial assets that are not derecognised in their entirety [line items] |  |  |  |  |  |  |  |
Advances received |  |  | € 317 |  |  |  |  |
Advances Received Used [Member] | Citi Bank Taiwan Limited [Member] |  |  |  |  |  |  |  |
Disclosure of transferred financial assets that are not derecognised in their entirety [line items] |  |  |  |  |  |  |  |
Advances received | $ |  |  |  | $ 94,471 |  |  |  |
Advances Received Used [Member] | Standard Chartered Bank [Member] |  |  |  |  |  |  |  |
Disclosure of transferred financial assets that are not derecognised in their entirety [line items] |  |  |  |  |  |  |  |
Advances received | $ |  |  |  | $ 53,800 |  |  |  |
Advances Received Used [Member] | First Commercial Bank [Member] |  |  |  |  |  |  |  |
Disclosure of transferred financial assets that are not derecognised in their entirety [line items] |  |  |  |  |  |  |  |
Advances received | $ |  | $ 8,565 |  |  | $ 6,879 |  |  |
Interest Rate On Advances Received Against Trade Receivables Sold [Member] | BNP Paribas [Member] |  |  |  |  |  |  |  |
Disclosure of transferred financial assets that are not derecognised in their entirety [line items] |  |  |  |  |  |  |  |
Interest rates on advances received | 0.80% | 0.80% | 0.80% | 0.80% | 0.80% |  |  |
Interest Rate On Advances Received Against Trade Receivables Sold [Member] | HSBC [Member] |  |  |  |  |  |  |  |
Disclosure of transferred financial assets that are not derecognised in their entirety [line items] |  |  |  |  |  |  |  |
Interest rates on advances received |  |  | 1.45% | 1.45% | 1.45% |  |  |
Interest Rate On Advances Received Against Trade Receivables Sold [Member] | Citi Bank Taiwan Limited [Member] | Maximum [Member] |  |  |  |  |  |  |  |
Disclosure of transferred financial assets that are not derecognised in their entirety [line items] |  |  |  |  |  |  |  |
Interest rates on advances received |  |  | 0.95% | 0.95% | 0.95% |  |  |
Interest Rate On Advances Received Against Trade Receivables Sold [Member] | Citi Bank Taiwan Limited [Member] | Minimum [Member] |  |  |  |  |  |  |  |
Disclosure of transferred financial assets that are not derecognised in their entirety [line items] |  |  |  |  |  |  |  |
Interest rates on advances received |  |  | 0.84% | 0.84% | 0.84% |  |  |
Interest Rate On Advances Received Against Trade Receivables Sold [Member] | Standard Chartered Bank [Member] |  |  |  |  |  |  |  |
Disclosure of transferred financial assets that are not derecognised in their entirety [line items] |  |  |  |  |  |  |  |
Interest rates on advances received |  |  | 0.91% | 0.91% | 0.91% |  |  |
Interest Rate On Advances Received Against Trade Receivables Sold [Member] | First Commercial Bank [Member] |  |  |  |  |  |  |  |
Disclosure of transferred financial assets that are not derecognised in their entirety [line items] |  |  |  |  |  |  |  |
Interest rates on advances received | 1.95% | 1.95% | 1.95% | 1.95% | 1.95% |  |  |

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