Other Investments - Schedule of Investment (Detail) - USD ($) $ in Thousands	Mar. 31, 2021	Mar. 31, 2020
Disclosure Of Financial Assets [Line Items]
Total other investments	$ 5,508	$ 3,683
Financial assets measured at FVOCI [Member]
Disclosure Of Financial Assets [Line Items]
Equity securities (unlisted)	5,409	3,584
Financial Assets Measured at Amortised Cost [Member]
Disclosure Of Financial Assets [Line Items]
Other securities	$ 99	$ 99

The amount of investments other than investments accounted for using the equity method. [Refer: Investments accounted for using equity method]

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2020-01-01
-Paragraph 55
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_55&doctype=Standard
-URIDate 2020-01-01

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Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant