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U.S. Dollar Amounts - Additional Information (Detail) | Dec. 31, 2018 TWD ($)
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Foreign Exchange Rates [Abstract] |
Exchange rate used for convenience translations | 30.61

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- Definition The spot exchange rate at the end of the reporting period. Exchange rate is the ratio of exchange for two currencies. Spot exchange rate is the exchange rate for immediate delivery. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2018-01-01 -Paragraph 112 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_112_c&doctype=Standard -URIDate 2018-03-16 + Details
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Balance Type: | na
Period Type: | instant

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- References No definition available. + Details
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Period Type: | duration