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Nature of Operations, Segment Reporting and Geographical Information - Net Sales and Segment Operating Profit for Each Reporting Segment (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Jan. 31, 2024
Jan. 31, 2023
Jan. 31, 2022
Segment Reporting Information [Line Items]      
Revenue $ 148,086 $ 142,527 [1] $ 117,480
Corporate Expenses 11,491 11,435 9,553
Operating Income 8,796 5,443 4,256
Other Income (Expense), Net $ (2,723) $ (2,033) $ 2,778
Segment Operating Profit % of Net Sales 13.70% 11.80% 11.80%
Income before Income Taxes $ 6,073 $ 3,410 $ 7,034
Income Tax Provision 1,379 749 605
Net Income 4,694 2,661 6,429
Operating Segments [Member]      
Segment Reporting Information [Line Items]      
Operating Income 20,287 16,878 13,809
Operating Segments [Member] | Product Identification [Member]      
Segment Reporting Information [Line Items]      
Revenue 104,041 103,089 90,915
Operating Income $ 10,087 $ 7,889 $ 10,411
Segment Operating Profit % of Net Sales 9.70% 7.70% 11.50%
Operating Segments [Member] | T&M [Member]      
Segment Reporting Information [Line Items]      
Revenue $ 44,045 $ 39,438 $ 26,565
Operating Income $ 10,200 $ 8,989 $ 3,398
Segment Operating Profit % of Net Sales 23.20% 22.80% 12.80%
Corporate Expenses [Member]      
Segment Reporting Information [Line Items]      
Corporate Expenses $ 11,491 $ 11,435 $ 9,553
[1]

*Certain amounts have been reclassified to conform to the current year's presentation.