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Financial Instruments - Impact of COVID-19 Pandemic - Additional Information (Detail) - USD ($) $ in Thousands | Mar. 31, 2021 | Mar. 31, 2020
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Cash and Cash Equivalents, Other Investments and Term Deposits [Member] |  |
Disclosure of Fair Value Measurement [Line Items] |  |
Assets carried at amortized cost | $ 450,088 | $ 168,010
Trade and Other Receivables [member] |  |
Disclosure of Fair Value Measurement [Line Items] |  |
Assets carried at amortized cost | 27,331 | 56,065
Level 3 [Member] |  |
Disclosure of Fair Value Measurement [Line Items] |  |
Financial assets, at fair value | $ 5,409 | $ 3,584

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- Definition The fair value of financial assets. [Refer: At fair value [member]; Financial assets] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2020-01-01 -Paragraph 25 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2020-en-r&anchor=para_25&doctype=Standard -URIDate 2020-01-01 + Details
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