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Segment Information - Net Sales and Segment Operating Profit (Loss) for Each Reporting Segment (Detail) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jul. 31, 2021
May 01, 2021
Aug. 01, 2020
May 02, 2020
Jul. 31, 2021
Aug. 01, 2020
Segment Reporting Information [Line Items]            
Revenue $ 29,845   $ 27,658   $ 58,923 $ 58,578
Corporate Expenses 2,664   2,535   5,008 4,861
Operating Income 3,452   204   4,186 868
Other Income (Expense), Net 4,266   328   3,897 (23)
Income Before Income Taxes 7,718   532   8,083 845
Income Tax Provision 699   529   471 411
Net Income 7,019 $ 593 3 $ 432 7,612 434
Product Identification [Member]            
Segment Reporting Information [Line Items]            
Revenue 23,492   21,629   46,590 44,009
T&M [Member]            
Segment Reporting Information [Line Items]            
Revenue 6,353   6,029   12,333 14,569
Operating Segments [Member]            
Segment Reporting Information [Line Items]            
Operating Income 6,116   2,739   9,194 5,729
Operating Segments [Member] | Product Identification [Member]            
Segment Reporting Information [Line Items]            
Operating Income 4,406   3,146   7,134 6,292
Operating Segments [Member] | T&M [Member]            
Segment Reporting Information [Line Items]            
Operating Income 1,710   (407)   $ 2,060 $ (563)
Corporate Expenses [Member]            
Segment Reporting Information [Line Items]            
Corporate Expenses $ 2,664   $ 2,535