| 
           Contingent Liabilities Re-measured (Detail) (USD $) 
        In Thousands, unless otherwise specified  | 
        
           Apr. 28, 2014 
         | 
        
           Mar. 31, 2014 
         | 
      
|---|---|---|
| Business Acquisition, Contingent Consideration [Line Items] | ||
| Contingent liabilities | $ 60 | $ 238 | 
| 
           Fair Value, Inputs, Level 3 
         | 
        ||
| Business Acquisition, Contingent Consideration [Line Items] | ||
| Contingent liabilities | $ 238 | 
| X | ||||||||||
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- Details 
          
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| X | ||||||||||
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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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