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Segment Information - Net Sales and Segment Operating Profit (Loss) for Each Reporting Segment (Detail) - USD ($)
 3 Months Ended 6 Months Ended
Jul. 29, 2023
Apr. 29, 2023
Jul. 30, 2022
Apr. 30, 2022
Jul. 29, 2023
Jul. 30, 2022
Segment Reporting Information [Line Items]            
Revenue $ 35,524,000   $ 32,259,000   $ 70,943,000 $ 63,269,000
Corporate Expenses 2,654,000   2,571,000   5,780,000 5,131,000
Operating Income (Loss) (1,198,000)   1,235,000   264,000 1,999,000
Other Income (Expense), Net (809,000)   (431,000)   (1,244,000) (710,000)
Income (Loss) Before Income Taxes (2,007,000)   804,000   (980,000) 1,289,000
Income Tax Provision (Benefit) (390,000)   220,000   (211,000) 280,000
Net Income (Loss) (1,617,000) $ 848,000 584,000 $ 425,000 (769,000) 1,009,000
Product Identification [Member]            
Segment Reporting Information [Line Items]            
Revenue 25,777,000   23,382,000   50,872,000 45,106,000
T&M [Member]            
Segment Reporting Information [Line Items]            
Revenue 9,747,000   8,877,000   20,071,000 18,163,000
Operating Segments [Member]            
Segment Reporting Information [Line Items]            
Operating Income (Loss) 1,456,000   3,806,000   6,044,000 7,130,000
Operating Segments [Member] | Product Identification [Member]            
Segment Reporting Information [Line Items]            
Operating Income (Loss) (461,000)   1,644,000   2,055,000 3,058,000
Operating Segments [Member] | T&M [Member]            
Segment Reporting Information [Line Items]            
Operating Income (Loss) 1,917,000   2,162,000   3,989,000 4,072,000
Corporate Expenses [Member]            
Segment Reporting Information [Line Items]            
Corporate Expenses $ 2,654,000   $ 2,571,000   $ 5,780,000 $ 5,131,000