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Segment Information - Net Sales and Segment Operating Profit for Each Reporting Segment (Detail) - USD ($)
 3 Months Ended 9 Months Ended
Oct. 28, 2023
Jul. 29, 2023
Apr. 29, 2023
Oct. 29, 2022
Jul. 30, 2022
Apr. 30, 2022
Oct. 28, 2023
Oct. 29, 2022
Segment Reporting Information [Line Items]                
Revenue $ 37,549,000     $ 39,405,000     $ 108,493,000 $ 102,674,000
Corporate Expenses 2,734,000     3,325,000     8,514,000 8,456,000
Operating Income 4,618,000     1,346,000     4,882,000 3,346,000
Other Income (Expense), net (917,000)     (955,000)     (2,161,000) (1,665,000)
Income Before Income Taxes 3,701,000     391,000     2,721,000 1,681,000
Income Tax Provision 949,000     102,000     738,000 383,000
Net Income 2,752,000 $ (1,617,000) $ 848,000 289,000 $ 584,000 $ 425,000 1,983,000 1,298,000
Product Identification [Member]                
Segment Reporting Information [Line Items]                
Revenue 26,543,000     29,879,000     77,416,000 74,985,000
T&M [Member]                
Segment Reporting Information [Line Items]                
Revenue 11,006,000     9,526,000     31,077,000 27,689,000
Operating Segments [Member]                
Segment Reporting Information [Line Items]                
Operating Income 7,352,000     4,671,000     13,396,000 11,802,000
Operating Segments [Member] | Product Identification [Member]                
Segment Reporting Information [Line Items]                
Operating Income 4,794,000     2,960,000     6,848,000 6,019,000
Operating Segments [Member] | T&M [Member]                
Segment Reporting Information [Line Items]                
Operating Income 2,558,000     1,711,000     6,548,000 5,783,000
Corporate Expenses [Member]                
Segment Reporting Information [Line Items]                
Corporate Expenses $ 2,734,000     $ 3,325,000     $ 8,514,000 $ 8,456,000