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Summary of Significant Accounting Policies - Additional Information (Detail) $ in Thousands	12 Months Ended
	Mar. 31, 2018 USD ($)
Disclosure of defined benefit plans [abstract]
Approximate maximum amount per employee available for lump-sum payment to eligible employees in India	$ 31

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- Definition

The maximum amount payable to eligible employees in India under defined benefit plan, on a lump-sum payment basis, at retirement, death, and incapacitation or on termination of employment based on the respective employees' salary and tenure of employment.

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