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Finance Expense - Summary of Finance Expense (Detail) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2016
Analysis of income and expense [abstract]
Interest expense	$ 3,215	$ 424	$ 265
Interest rate swaps	561	71
Debt issue cost	488	52	13
Total	$ 4,264	$ 547	$ 278

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The amount of costs associated with financing activities of the entity.

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The amount of expense arising from interest.

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The losses resulting from changes in the fair value of derivatives recognised in profit or loss. [Refer: Derivatives [member]]

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