| Property and Equipment - Additional Information (Detail) - USD ($) $ in Thousands | 12 Months Ended | ||
|---|---|---|---|
| Mar. 31, 2017 | Mar. 31, 2016 | Mar. 31, 2015 | |
| Continuing Operations | |||
| Property Plant And Equipment [Line Items] | |||
| Depreciation expense | $ 1,002 | $ 437 | $ 98 | 
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- Definition The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available. 
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- Details 
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