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Nature of Operations, Segment Reporting and Geographical Information - Additional Information (Detail) $ in Thousands | 12 Months Ended |  |
--- | --- | --- | ---
Jan. 31, 2021 USD ($) Segment | Jan. 31, 2020 USD ($) Segment | Jan. 31, 2019 USD ($) Segment
Segment Reporting Information [Line Items] |  |  |
Number of reporting segments | Segment | 2 |  |
Customer accounted for greater than 10% of net sales | Segment | 0 | 0 | 0
Goodwill assigned | $ 12,806 | $ 12,034 | $ 12,329
T&M [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Goodwill assigned | 4,500 | 4,500 |
Product Identification [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Goodwill assigned | $ 8,300 | $ 7,500 |

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- Definition Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(10)(1)) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=120320667&loc=SL49117168-202975 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=99380562&loc=d3e13770-109266 + Details
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