Goodwill and Intangible Assets - Additional Information (Detail) - USD ($) |
1 Months Ended | 3 Months Ended | 12 Months Ended | ||||||
|---|---|---|---|---|---|---|---|---|---|
Aug. 01, 2016 |
Jan. 31, 2017 |
Oct. 31, 2017 |
Jan. 31, 2017 |
Jan. 31, 2018 |
Jan. 31, 2017 |
Jan. 31, 2016 |
Aug. 01, 2017 |
May 05, 2016 |
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| Goodwill And Intangible Assets [Line Items] | |||||||||
| Goodwill | $ 23,287,000 | $ 23,287,000 | $ 25,579,000 | $ 23,287,000 | $ 40,175,000 | ||||
| Impairment charge | $ 0 | 0 | 23,492,000 | ||||||
| Loss on impairment of long-lived assets | $ 500,000 | $ 23,500,000 | 23,772,000 | 21,464,000 | |||||
| Amortization of intangible assets | $ 2,400,000 | $ 3,300,000 | $ 4,800,000 | ||||||
| DCC Labs [Member] | |||||||||
| Goodwill And Intangible Assets [Line Items] | |||||||||
| Goodwill | $ 45,800,000 | $ 7,255,000 | |||||||
| Fair value | 22,300,000 | $ 64,200,000 | |||||||
| Impairment charge | $ 0 | ||||||||
| Fair value of reporting unit less than carrying value | 102,500,000 | ||||||||
| Loss on impairment of long-lived assets | $ 23,500,000 | ||||||||
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- Definition Amortization expense charged to cost of product revenue and operating expense. No definition available.
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- Definition Goodwill And Intangible Assets [Line Items] No definition available.
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- Definition Reporting unit amount of fair value lower than 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 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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- Definition The aggregate amount of write-downs for impairments recognized during the period for long lived assets held for use (including those held for disposal by means other than sale). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Details
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