| Commitments and Contingencies - Additional Information (Detail) ₪ in Thousands, $ in Thousands | 12 Months Ended | ||||
|---|---|---|---|---|---|
| May 30, 2013  USD ($)  segment  defendant | May 30, 2013  ILS (₪)  segment  defendant | Mar. 31, 2017  USD ($) | Mar. 31, 2016  USD ($) | Mar. 31, 2015  USD ($) | |
| Commitments and Contingencies Disclosure [Abstract] | |||||
| Rental expense for continuing operations | $ | $ 819 | $ 804 | $ 629 | ||
| Class action lawsuit filed | $ 5,300 | ₪ 19,200 | |||
| Number of additional companies | defendant | 2 | 2 | |||
| Number of segments on call | segment | 2 | 2 | |||
| X | ||||||||||
| 
- Definition Loss Contingency, Number Of Additional Defendants No definition available. 
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| X | ||||||||||
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- Definition Number of Segments on Call No definition available. 
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| X | ||||||||||
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- Definition Amount of bankruptcy claim filed with bankruptcy court. No definition available. 
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| X | ||||||||||
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- References No definition available. 
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| X | ||||||||||
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- Definition Rental expense for the reporting period incurred under operating leases, including minimum and any contingent rent expense, net of related sublease income. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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