Consolidated Balance Sheet Detail - Additional Information (Detail) - USD ($) $ in Thousands |
3 Months Ended | 12 Months Ended | |
|---|---|---|---|
Jan. 31, 2019 |
Jan. 31, 2019 |
Jan. 31, 2018 |
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| Balance Sheet Related Disclosures [Line Items] | |||
| Impairment charge | $ 1,200 | ||
| Carrying value | 20,990 | $ 20,990 | $ 29,858 |
| Depreciation and amortization expense | 2,924 | 4,696 | |
| Property and Equipment [Member] | |||
| Balance Sheet Related Disclosures [Line Items] | |||
| Depreciation and amortization expense | 1,300 | 2,300 | |
| Buildings [Member] | |||
| Balance Sheet Related Disclosures [Line Items] | |||
| Impairment charge | 1,200 | 1,200 | |
| Carrying value | $ 3,467 | $ 3,467 | $ 11,839 |
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- Definition Balance sheet related disclosures. No definition available.
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- 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/disclosureRef
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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://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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