| Contingent Liabilities (Detail) (USD $) In Thousands, unless otherwise specified | Apr. 28, 2014 | Mar. 31, 2014 | 
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| Contingent Liabilities | ||
| Contingent liability, net of discount | $ 60 | $ 238 | 
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- Definition Amount of liability recognized arising from contingent consideration in a business combination. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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