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Trade Receivables, Net - Transfer of Financial Asset (Parenthetical) (Detail) - TWD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Citi Bank Taiwan Limited [Member]
Disclosure of transferred financial assets that are not derecognised in their entirety [line items]
Promissory notes issued	$ 2,000	$ 2,000

X

- Definition

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.

+ References

No definition available.

+ Details

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Balance Type:	na
Period Type:	duration

X

- Definition

The amount of notes and debentures issued by the entity.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2021-01-01
-Paragraph 112
-Subparagraph c
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2021-en-r&anchor=para_112_c&doctype=Standard
-URIDate 2021-03-24

+ Details

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Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Details

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Namespace Prefix:
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Period Type: