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Financial Risk Management Objectives - Summary of Balance of Financial Assets and Liabilities Denominated in a Currency Different from the Company's Reporting Currency (Detail) € in Thousands, ฿ in Thousands, ¥ in Thousands, ¥ in Thousands, $ in Thousands, $ in Thousands, $ in Thousands, $ in Thousands	Dec. 31, 2019 USD ($)	Dec. 31, 2019 THB (฿)	Dec. 31, 2019 TWD ($)	Dec. 31, 2019 CNY (¥)	Dec. 31, 2019 SGD ($)	Dec. 31, 2019 HKD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2018 THB (฿)	Dec. 31, 2018 TWD ($)	Dec. 31, 2018 CNY (¥)	Dec. 31, 2018 SGD ($)	Dec. 31, 2018 HKD ($)	Dec. 31, 2018 AUD ($)	Dec. 31, 2018 EUR (€)	Dec. 31, 2018 JPY (¥)	Aug. 13, 2014 USD ($)
Disclosure of nature and extent of risks arising from financial instruments [Line Items]
Financial assets denominated in a currency different	$ 151,492,000						$ 168,097,000
Financial liabilities denominated in a currency different	34,350,000						49,170,000									$ 0
Foreign currency risk [Member] | United States dollar (USD) [Member]
Disclosure of nature and extent of risks arising from financial instruments [Line Items]
Financial assets denominated in a currency different	19,263,000						21,529,000
Financial liabilities denominated in a currency different	$ 4,802,000						$ 25,733,000
Foreign currency risk [Member] | Thai Baht (THB) [Member]
Disclosure of nature and extent of risks arising from financial instruments [Line Items]
Financial assets denominated in a currency different | ฿		฿ 346						฿ 349
Financial liabilities denominated in a currency different | ฿		฿ 87,779						฿ 30
Foreign currency risk [Member] | Singapore dollars (SGD) [Member]
Disclosure of nature and extent of risks arising from financial instruments [Line Items]
Financial assets denominated in a currency different					$ 233						$ 170
Financial liabilities denominated in a currency different					$ 20						$ 62
Foreign currency risk [Member] | Taiwan dollar (TWD) [Member]
Disclosure of nature and extent of risks arising from financial instruments [Line Items]
Financial assets denominated in a currency different			$ 9,711						$ 5,227
Financial liabilities denominated in a currency different			$ 7,648						$ 4,872
Foreign currency risk [Member] | Renminbi (RMB) [Member]
Disclosure of nature and extent of risks arising from financial instruments [Line Items]
Financial assets denominated in a currency different | ¥				¥ 119						¥ 19
Financial liabilities denominated in a currency different | ¥										¥ 179
Foreign currency risk [Member] | Hong Kong, dollar (HKD) [Member]
Disclosure of nature and extent of risks arising from financial instruments [Line Items]
Financial assets denominated in a currency different						$ 7,526						$ 20,005
Financial liabilities denominated in a currency different						$ 83						$ 43
Foreign currency risk [Member] | Australian dollar (AUD) [Member]
Disclosure of nature and extent of risks arising from financial instruments [Line Items]
Financial assets denominated in a currency different													$ 66
Foreign currency risk [Member] | Euro (EUR) [Member]
Disclosure of nature and extent of risks arising from financial instruments [Line Items]
Financial liabilities denominated in a currency different | €														€ 199
Foreign currency risk [Member] | Japanese yen (JPY) [Member]
Disclosure of nature and extent of risks arising from financial instruments [Line Items]
Financial liabilities denominated in a currency different | ¥															¥ 14,768

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- 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.

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No definition available.

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The amount of assets that are: (a) cash; (b) an equity instrument of another entity; (c) a contractual right: (i) to receive cash or another financial asset from another entity; or (ii) to exchange financial assets or financial liabilities with another entity under conditions that are potentially favourable to the entity; or (d) a contract that will, or may be, settled in the entity’s own equity instruments and is: (i) a non-derivative for which the entity is, or may be, obliged to receive a variable number of the entity’s own equity instruments; or (ii) a derivative that will, or may be, settled other than by the exchange of a fixed amount of cash or another financial asset for a fixed number of the entity’s own equity instruments. For this purpose the entity’s own equity instruments do not include puttable financial instruments classified as equity instruments in accordance with paragraphs 16A-16B of IAS 32, instruments that impose on the entity an obligation to deliver to another party a pro rata share of the net assets of the entity only on liquidation and are classified as equity instruments in accordance with paragraphs 16C-16D of IAS 32, or instruments that are contracts for the future receipt or delivery of the entity’s own equity instruments. [Refer: Financial instruments, class [member]; Financial liabilities]

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The amount of liabilities that are: (a) a contractual obligation: (i) to deliver cash or another financial asset to another entity; or (ii) to exchange financial assets or financial liabilities with another entity under conditions that are potentially unfavourable to the entity; or (b) a contract that will, or may be, settled in the entity’s own equity instruments and is: (i) a non-derivative for which the entity is, or may be, obliged to deliver a variable number of the entity’s own equity instruments; or (ii) a derivative that will, or may be, settled other than by the exchange of a fixed amount of cash or another financial asset for a fixed number of the entity’s own equity instruments. For this purpose, rights, options or warrants to acquire a fixed number of the entity’s own equity instruments for a fixed amount of any currency are equity instruments if the entity offers the rights, options or warrants pro rata to all of its existing owners of the same class of its own non-derivative equity instruments. Also, for those purposes the entity’s own equity instruments do not include puttable financial instruments that are classified as equity instruments in accordance with paragraphs 16A-16B of IAS 32, instruments that impose on the entity an obligation to deliver to another party a pro rata share of the net assets of the entity only on liquidation and are classified as equity instruments in accordance with paragraphs 16C-16D of IAS 32, or instruments that are contracts for the future receipt or delivery of the entity’s own equity instruments. As an exception, an instrument that meets the definition of a financial liability is classified as an equity instrument if it has all the features and meets the conditions in paragraphs 16A-16B or paragraphs 16C-16D of IAS 32. [Refer: Financial instruments, class [member]; Financial assets; Derivatives [member]]

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