Consolidated Balance Sheet Detail - Additional Information (Detail) - USD ($) $ in Thousands |
3 Months Ended | 12 Months Ended | ||
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Jan. 31, 2020 |
Jul. 31, 2019 |
Jan. 31, 2020 |
Jan. 31, 2019 |
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Balance Sheet Related Disclosures [Line Items] | ||||
Impairment charge | $ 0 | |||
Carrying value | $ 11,177 | $ 11,177 | $ 20,990 | |
Loss on sale of fixed assets | 5,423 | |||
Property and Equipment [Member] | ||||
Balance Sheet Related Disclosures [Line Items] | ||||
Depreciation expense | 900 | 1,300 | ||
Buildings [Member] | ||||
Balance Sheet Related Disclosures [Line Items] | ||||
Impairment charge | 1,200 | |||
Carrying value | 3,500 | $ 3,500 | $ 3,467 | |
Buildings [Member] | Massachusetts [Member] | ||||
Balance Sheet Related Disclosures [Line Items] | ||||
Proceeds from sale of building, net of disposal costs | 500 | |||
Loss on sale of fixed assets | $ 5,400 |
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- Definition Balance sheet related disclosures. No definition available.
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- Definition The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of gain (loss) on sale or disposal of property, plant and equipment assets, including oil and gas property and timber property. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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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 The cash inflow from sale of buildings. 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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