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Revenue Recognition - Additional Information (Detail) - USD ($) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Jul. 31, 2021 | Jan. 31, 2022 | Jan. 31, 2021
Contract liabilities and extended warranties |  | $ 262,000 | $ 285,000
Revenue recognized |  | 269,000 |
Contract assets balance |  | 1,200,000 | 900,000
Additional contract costs |  |  | $ 400,000
Amortization of incremental direct costs |  | 60,000 |
Deferred incremental direct contract costs reported in other current assets |  | 100,000 |
Deferred incremental direct costs net of accumulated amortization |  | $ 1,300,000 |
Capitalized contract costs additional amounts incurred amortization period |  | 6 years | 20 years
Change in Accounting Method Accounted for as Change in Estimate [Member] |  |  |
Capitalized contract costs additional amounts incurred amortization period | 20 years |  |

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- Definition Amount of amortization expense for asset recognized from cost incurred to obtain or fulfill contract with customer. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 340 -SubTopic 40 -Section 50 -Paragraph 3 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123353750&loc=SL49131252-203054 + Details
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