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Income Tax - Summary of Unused Loss Carry-forward (Detail) - Dec. 31, 2021 $ in Thousands, $ in Thousands | TWD ($) | USD ($)
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Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Unused loss carry-forward | $ 1,979,629 | $ 71,363
2022 [member] |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Unused loss carry-forward | 243,136 | 8,765
2023 [member] |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Unused loss carry-forward | 192,254 | 6,930
2024 [member] |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Unused loss carry-forward | 171,664 | 6,188
2025 [member] |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Unused loss carry-forward | 185,524 | 6,688
2026 and thereafter [Member] |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Unused loss carry-forward | $ 1,187,051 | $ 42,792

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- Definition The amount of deferred tax liabilities net of deferred tax assets, when the absolute amount of deferred tax liabilities is greater than the absolute amount of deferred tax assets. [Refer: Deferred tax assets; Deferred tax liabilities] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 12 -IssueDate 2021-01-01 -Paragraph 81 -Subparagraph g -Clause i -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=12&code=ifrs-tx-2021-en-r&anchor=para_81_g_i&doctype=Standard -URIDate 2021-03-24 + Details
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