Disposal of Subsidiaries - Summary of Analysis of Assets and Liabilities on Date Control was Lost (Detail) - 1 months ended Jun. 30, 2017 - KSDY [member] $ in Thousands, $ in Thousands	TWD ($)	USD ($)	USD ($)
Current assets
Cash and cash equivalents	$ 29,133		$ 983
Inventories related to real estate business	1,427,874		$ 48,174
Net assets disposed of	$ 1,457,007	$ 49,157

The amount of assets, other than cash or cash equivalents, in subsidiaries or other businesses over which control is obtained or lost. [Refer: Subsidiaries [member]]

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 7
-IssueDate 2017-01-01
-Paragraph 40
-Subparagraph d
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=7&date=2017-03-01&anchor=para_40_d&doctype=Standard
-URIDate 2017-03-09

Name:	ifrs-full_AssetsOtherThanCashOrCashEquivalentsInSubsidiaryOrBusinessesAcquiredOrDisposed2013
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration