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Other Current Liability - Summary of Revenue Recognized in Relation to Contract Liabilities (Detail) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019
Current contract liabilities |  |
Revenue recognized that was included in the contract liabilities balance at the beginning of the year | $ 209 | $ 744
Advance from customers |  |
Current contract liabilities |  |
Revenue recognized that was included in the contract liabilities balance at the beginning of the year | 93 | 668
Transportation Service |  |
Current contract liabilities |  |
Revenue recognized that was included in the contract liabilities balance at the beginning of the year | 56 | 17
Custodial service |  |
Current contract liabilities |  |
Revenue recognized that was included in the contract liabilities balance at the beginning of the year | $ 60 | $ 59

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- Definition The amount of revenue that was included in the contract liability balance at the beginning of the period. [Refer: Contract liabilities; Revenue from contracts with customers] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 15 -IssueDate 2020-01-01 -Paragraph 116 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=15&code=ifrs-tx-2020-en-r&anchor=para_116_b&doctype=Standard -URIDate 2020-01-01 + Details
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- Details
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