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Purchased Intangible Assets - Schedule of Expected Amortization Expense (Detail) (USD $) | Jan. 31, 2014
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Goodwill And Intangible Assets Disclosure [Abstract] |
2015 | $ 243,000
2016 | 243,000
2017 | 243,000
2018 | 243,000
2019 | 243,000
Thereafter | 692,000
Total | $ 1,907,000

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