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Financial Instruments - Contractual Maturities of Financial Liabilities (Parenthetical) (Detail) - USD ($) $ in Thousands	Mar. 31, 2019	Mar. 31, 2018
Disclosure Of Maturity Analysis For Financial Liabilities [abstract]
Unamortised debt issuance cost	$ 409	$ 769

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- Definition

Disclosure of maturity analysis for financial liabilities abstract.

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No definition available.

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- Definition

Unamortized debt issuance costs netted off with the amount of non-current borrowings.

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No definition available.

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