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Nature of Operations, Segment Reporting and Geographical Information - Net Sales and Segment Operating Profit (loss) for Each Reporting Segment (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Jan. 31, 2022
Jan. 31, 2021
Jan. 31, 2020
Segment Reporting Information [Line Items]      
Revenue $ 117,480 $ 116,033 $ 133,446
Corporate Expenses 9,553 9,420 11,357
Operating Income 4,256 2,433 2,433
Other Income (Expense), Net $ 2,778 $ (254) $ (1,063)
Segment Operating Profit % of Net Sales 11.80% 10.20% 10.30%
Income before Income Taxes $ 7,034 $ 2,179 $ 1,370
Income Tax Provision (Benefit) 605 895 (389)
Net Income 6,429 1,284 1,759
Operating Segments [Member]      
Segment Reporting Information [Line Items]      
Operating Income 13,809 11,853 13,790
Operating Segments [Member] | Product Identification [Member]      
Segment Reporting Information [Line Items]      
Revenue 90,915 90,268 88,116
Operating Income $ 10,411 $ 12,885 $ 7,509
Segment Operating Profit % of Net Sales 11.50% 14.30% 8.50%
Operating Segments [Member] | T&M [Member]      
Segment Reporting Information [Line Items]      
Revenue $ 26,565 $ 25,765 $ 45,330
Operating Income $ 3,398 $ (1,032) $ 6,281
Segment Operating Profit % of Net Sales 12.80% (4.00%) 13.90%
Corporate Expenses [Member]      
Segment Reporting Information [Line Items]      
Corporate Expenses $ 9,553 $ 9,420 $ 11,357