Consolidated Balance Sheet Detail - Additional Information (Detail) - USD ($) $ in Thousands |
3 Months Ended | 9 Months Ended | 12 Months Ended | ||||
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Oct. 31, 2017 |
Oct. 31, 2016 |
Oct. 31, 2017 |
Oct. 31, 2016 |
Jan. 31, 2017 |
Sep. 30, 2016 |
Aug. 31, 2016 |
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Balance Sheet Related Disclosures [Abstract] | |||||||
Depreciation and amortization expense | $ 600 | $ 700 | $ 1,758 | $ 2,289 | |||
Assets held for sale | $ 200 | $ 300 | |||||
Loss on impairment of long-lived assets held for sale | $ 100 | $ 100 | $ 300 |
X | ||||||||||
- Definition Amount of assets held-for-sale that are not part of a disposal group, expected to be sold within a year or the normal operating cycle, if longer. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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X | ||||||||||
- References No definition available.
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X | ||||||||||
- Definition The aggregate expense recognized in the current period that allocates the cost of tangible assets, intangible assets, or depleting assets to periods that benefit from use of the assets. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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X | ||||||||||
- Definition The aggregate amount of write-downs for impairments recognized during the period for long-lived assets held for abandonment, exchange or sale. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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