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Significant Customers and Geographic Information (Details)
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3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
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Jul. 31, 2012
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Jul. 31, 2011
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Jul. 31, 2012
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Jul. 31, 2011
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Customer A [Member]
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| Entity-Wide Revenue, Major Customer, Percentage | 22.00% | 28.00% | 19.00% | 26.00% |
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Customer B [Member]
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| Entity-Wide Revenue, Major Customer, Percentage | 11.00% | 10.00% | 11.00% | 10.00% |
| X | ||||||||||
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- Definition
Percentage of revenue generated from a single external customer that accounts for 10 percent or more of an entity's revenues. No definition available.
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