Goodwill and Intangible Assets - Additional Information (Detail) - USD ($) |
6 Months Ended | ||
|---|---|---|---|
Jul. 31, 2016 |
May 05, 2016 |
Jan. 31, 2016 |
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| Goodwill And Intangible Assets [Line Items] | |||
| Goodwill | $ 45,807,000 | $ 40,175,000 | |
| Goodwill, Impairment charges | $ 0 | ||
| Maximum [Member] | |||
| Goodwill And Intangible Assets [Line Items] | |||
| Percentage of fair value of goodwill exceeding carrying value | 24.40% | ||
| Fair value of goodwill exceeding carrying value | $ 25,000,000 | ||
| Minimum [Member] | |||
| Goodwill And Intangible Assets [Line Items] | |||
| Percentage of fair value of goodwill exceeding carrying value | 15.00% | ||
| Fair value of goodwill exceeding carrying value | $ 15,400,000 | ||
| DCC Labs [Member] | |||
| Goodwill And Intangible Assets [Line Items] | |||
| Goodwill | $ 5,100,000 | $ 5,071,000 |
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- Definition Goodwill And Intangible Assets [Line Items] No definition available.
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- Definition Percentage of fair value of goodwill exceeding carrying value. 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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- 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 Amount of fair value of reporting unit in excess of carrying amount. No definition available.
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