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Loss Per Share - Additional information (Detail) - shares	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Earnings Per Share [Abstract]
Employees share based awards were excluded from the diluted weighted average number of ordinary shares calculation	1,965,251	2,060,026	2,445,546
Ordinary shares issuable on conversion of convertible notes excluded from the diluted weighted average number of ordinary shares calculation	812,988

X

- Definition

The number of dilutive potential ordinary shares that relate to the assumed conversion of the entity's convertible instruments.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 33
-IssueDate 2020-01-01
-Paragraph 70
-Subparagraph b
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-URIDate 2020-01-01

+ Details

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Balance Type:	na
Period Type:	duration

X

- Definition

The number of dilutive potential ordinary shares that relate to the assumed exercise of the entity's share options.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 33
-IssueDate 2020-01-01
-Paragraph 70
-Subparagraph b
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=33&code=ifrs-tx-2020-en-r&anchor=para_70_b&doctype=Standard
-URIDate 2020-01-01

+ Details

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Namespace Prefix:	ifrs-full_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

X

- References

No definition available.

+ Details

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