Goodwill and Intangible Assets - Additional Information (Detail) - USD ($) |
3 Months Ended | 9 Months Ended | |||
|---|---|---|---|---|---|
Oct. 31, 2017 |
Oct. 31, 2017 |
Aug. 01, 2017 |
Jan. 31, 2017 |
May 05, 2016 |
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| Goodwill And Intangible Assets [Line Items] | |||||
| Goodwill | $ 24,506,000 | $ 24,506,000 | $ 23,287,000 | ||
| Impairment charge | 0 | $ 0 | |||
| DCC Labs [Member] | |||||
| Goodwill And Intangible Assets [Line Items] | |||||
| Goodwill | $ 7,255,000 | ||||
| Fair value of reporting unit | $ 64,200,000 | ||||
| Impairment charge | $ 0 |
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- Definition Goodwill And Intangible Assets [Line Items] 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 Fair value portion of 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 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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- Details
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