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Goodwill and Intangible Assets - Additional Information (Detail) (USD $)
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3 Months Ended | 12 Months Ended | ||
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Jan. 31, 2014
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Jan. 31, 2014
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Jan. 31, 2013
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Jan. 31, 2012
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| Goodwill And Intangible Assets Disclosure [Abstract] | ||||
| Goodwill | $ 45,150,000 | $ 45,150,000 | $ 45,103,000 | $ 63,640,000 |
| Goodwill, Impairment Loss | 0 | |||
| Intangible assets, net | 12,855,000 | 12,855,000 | 17,514,000 | |
| Amortization of intangibles assets | 4,600,000 | 6,400,000 | 6,300,000 | |
| Amortization expense charged to cost of product revenues | 1,269,000 | 2,429,000 | 2,487,000 | |
| Amortization expense charged to operating expense | $ 3,361,000 | $ 3,966,000 | $ 3,784,000 | |
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- Definition
Represents the amortization expense charged to operating expense. No definition available.
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- Definition
The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Aggregate depreciation, depletion and amortization expense in the current period for the cost of tangible assets, intangible assets, or depleting assets directly related to goods produced and sold during the reporting period. No definition available.
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- Definition
Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Details
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- Definition
Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Sum of the carrying amounts of all intangible assets, excluding goodwill, as of the balance sheet date, net of accumulated amortization and impairment charges. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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