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Investment Properties - Fair Value of Investment Properties (Detail) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
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Disclosure of detailed information about investment property [Line Items] |  |  |
Investment properties | $ 6,378 | $ 730 | $ 720
Land [Member] |  |  |
Disclosure of detailed information about investment property [Line Items] |  |  |
Investment properties | 466 | 467 |
Office buildings for rent [Member] |  |  |
Disclosure of detailed information about investment property [Line Items] |  |  |
Investment properties | 240 | 263 |
Warehouse |  |  |
Disclosure of detailed information about investment property [Line Items] |  |  |
Investment properties | 5,577 |  |
Land leasehold right [Member] |  |  |
Disclosure of detailed information about investment property [Line Items] |  |  |
Investment properties | 95 |  |
Fair value [Member] | Land [Member] |  |  |
Disclosure of detailed information about investment property [Line Items] |  |  |
Investment properties | 11,521 | 11,566 |
Fair value [Member] | Office buildings for rent [Member] |  |  |
Disclosure of detailed information about investment property [Line Items] |  |  |
Investment properties | 2,060 | $ 1,460 |
Fair value [Member] | Warehouse |  |  |
Disclosure of detailed information about investment property [Line Items] |  |  |
Investment properties | 5,701 |  |
Fair value [Member] | Land leasehold right [Member] |  |  |
Disclosure of detailed information about investment property [Line Items] |  |  |
Investment properties | $ 96 |  |

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- Definition The amount of property (land or a building - or part of a building - or both) held (by the owner or by the lessee as a right-of-use asset) to earn rentals or for capital appreciation or both, rather than for: (a) use in the production or supply of goods or services or for administrative purposes; or (b) sale in the ordinary course of business. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 40 -IssueDate 2020-01-01 -Paragraph 76 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=40&code=ifrs-tx-2020-en-r&anchor=para_76&doctype=Standard -URIDate 2020-01-01 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 40 -IssueDate 2020-01-01 -Paragraph 79 -Subparagraph d -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=40&code=ifrs-tx-2020-en-r&anchor=para_79_d&doctype=Standard -URIDate 2020-01-01 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2020-01-01 -Paragraph 54 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_54_b&doctype=Standard -URIDate 2020-01-01 + Details
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