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Additional Capital Disclosures - Summary of Capital Structure (Parenthetical) (Detail) - USD ($) $ in Thousands	Mar. 31, 2018	Mar. 31, 2017
Disclosure of objectives, policies and processes for managing capital [abstract]
Unamortised debt issuance cost	$ 769	$ 1,257

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- Definition

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

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