Consolidated Balance Sheet Detail - Additional Information (Detail) - USD ($) $ in Thousands |
3 Months Ended | 12 Months Ended | |
|---|---|---|---|
Jan. 31, 2020 |
Jan. 31, 2021 |
Jan. 31, 2020 |
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| Balance Sheet Related Disclosures [Line Items] | |||
| Loss on sale of fixed assets | $ 7 | $ 5,423 | |
| Property and Equipment [Member] | |||
| Balance Sheet Related Disclosures [Line Items] | |||
| Depreciation expense | $ 300 | 900 | |
| 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 cash inflow from sale of buildings. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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