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Current Provisions - Movements in Provisions (Detail) - 12 months ended Dec. 31, 2019 $ in Thousands, $ in Thousands	TWD ($)	USD ($)
Disclosure of other provisions [Line Items]
Beginning balance	$ 29,352
Ending balance	1,998	$ 67
Provisions for deficiency compensation [member]
Disclosure of other provisions [Line Items]
Beginning balance	29,352
Provision	5,204
Reversal	(1,967)
Payment	(30,591)
Ending balance	$ 1,998

X

- Definition

The amount of additional other provisions made. [Refer: Other provisions]

+ References

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-IssueDate 2019-01-01
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-URIDate 2019-03-27

+ Details

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Balance Type:	credit
Period Type:	duration

X

- Definition

Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table.

+ References

No definition available.

+ Details

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X

- Definition

The amount of current provisions other than provisions for employee benefits. [Refer: Provisions]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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-IssueDate 2019-01-01
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-URIDate 2019-03-27

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X

- Definition

The amount used (ie incurred and charged against the provision) for other provisions. [Refer: Other provisions]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 37
-IssueDate 2019-01-01
-Paragraph 84
-Subparagraph c
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-URIDate 2019-03-27

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X

- Definition

The amount reversed for unused other provisions. [Refer: Other provisions]

+ References

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-Number 37
-IssueDate 2019-01-01
-Paragraph 84
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-URIDate 2019-03-27

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