Significant Customers and Geographic Information - Schedule of Revenue by Major Customers by Reporting Segments (Detail) (Sales [Member])
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3 Months Ended | 6 Months Ended | ||
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Jul. 31, 2013
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Jul. 31, 2012
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Jul. 31, 2013
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Jul. 31, 2012
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Customer A [Member]
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Entity Wide Portfolio Carrying Amount, Major Customer [Line Items] | ||||
Entity-Wide Revenue, Major Customer, Percentage | 22.00% | 17.00% | 27.00% | 17.00% |
Customer B [Member]
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Entity Wide Portfolio Carrying Amount, Major Customer [Line Items] | ||||
Entity-Wide Revenue, Major Customer, Percentage | 15.00% | 22.00% | 15.00% | 19.00% |
Customer C [Member]
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Entity Wide Portfolio Carrying Amount, Major Customer [Line Items] | ||||
Entity-Wide Revenue, Major Customer, Percentage | 14.00% | 11.00% |
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- Details
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- Definition
For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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