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Summary of Significant Accounting Policies - Additional Information (Detail) - USD ($) | 12 Months Ended
--- | ---
Jan. 31, 2025 | Jan. 31, 2024 | Jan. 31, 2023
Summary Of Significant Accounting Policies [Line Items] |  |  |
Highly liquid investments with an original maturity | 90 |  |
Cash of held in foreign bank accounts | $ 2,700,000 | $ 2,300,000 |
Net transactional foreign exchange gain (loss) | 335,000 | (83,000) | $ (474,000)
Advertising expense | 2,000,000 | 1,800,000 | 1,600,000
Impairment of Long lived assets held for use | 0 | 0 | 0
Impairment charges for intangible assets | 0 | 0 | 0
Goodwill impairment charges | $ 13,403,000 | $ 0 | $ 0
Number of common equivalent shares | 173,380 | 295,370 | 685,667
Liability for self-insured claims | $ 300,000 | $ 300,000 |
Foreign Exchange [Member] |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Net transactional foreign exchange gain (loss) | (500,000) | (100,000) | $ (500,000)
PI [Member] |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Goodwill impairment charges | 13,403,000 | 0 | 0
T&M [Member] |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Goodwill impairment charges | $ 0 | $ 0 | $ 0
Maximum [Member] | Customer Concentration Risk [Member] | Sales Revenue, Net [Member] |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Percentage of revenue satisfied for services | 5.00% | 5.00% |
Maximum [Member] | Airborne Product [Member] |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Products warranty period | 5 years |  |
Minimum [Member] | Airborne Product [Member] |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Products warranty period | 3 years |  |
Land Improvements [Member] | Maximum [Member] |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Estimated useful lives of the assets | 20 years |  |
Land Improvements [Member] | Minimum [Member] |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Estimated useful lives of the assets | 10 years |  |
Building And Leasehold Improvements [Member] | Maximum [Member] |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Estimated useful lives of the assets | 45 years |  |
Building And Leasehold Improvements [Member] | Minimum [Member] |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Estimated useful lives of the assets | 10 years |  |
Machinery and Equipment [Member] | Maximum [Member] |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Estimated useful lives of the assets | 10 years |  |
Machinery and Equipment [Member] | Minimum [Member] |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Estimated useful lives of the assets | 3 years |  |
Computer Equipment And Software [Member] | Maximum [Member] |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Estimated useful lives of the assets | 10 years |  |
Computer Equipment And Software [Member] | Minimum [Member] |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Estimated useful lives of the assets | 3 years |  |
ASU 2023-07 [Member] |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Change in Accounting Principle, Accounting Standards Update, Adopted | true |  |
Change in Accounting Principle, Accounting Standards Update, Adoption Date | Jan. 31, 2025 |  |
Change in Accounting Principle, Accounting Standards Update, Immaterial Effect | true |  |

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