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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 9 Months Ended
Oct. 29, 2022
Oct. 29, 2022
Jul. 30, 2022
Apr. 30, 2022
Oct. 30, 2021
Jul. 31, 2021
May 01, 2021
Oct. 29, 2022
Oct. 29, 2022
Oct. 31, 2021
Oct. 30, 2021
Segment Reporting Information [Line Items]                      
Revenue $ 39,405,000       $ 28,857,000       $ 102,674,000 $ 87,780,000 $ 87,780,000
Corporate Expenses 3,325,000       2,364,000       8,456,000   7,372,000
Operating Income 1,346,000       296,000       3,346,000 4,482,000 4,482,000
Other Income (Expense), Net (955,000)       (895,000)       (1,665,000) 3,002,000 3,002,000
Income (Loss) Before Income Taxes 391,000       (599,000)       1,681,000 7,484,000 7,484,000
Income Tax Provision (Benefit) 102,000       (174,000)     $ 383,000 383,000 297,000 297,000
Net Income (Loss) 289,000 $ 289,000 $ 584,000 $ 425,000 (425,000) $ 7,019,000 $ 593,000   1,298,000 7,187,000 $ 7,187,000
Product Identification [Member]                      
Segment Reporting Information [Line Items]                      
Revenue 29,879,000       21,928,000       74,985,000 68,519,000  
T&M [Member]                      
Segment Reporting Information [Line Items]                      
Revenue 9,526,000       6,929,000       27,689,000 19,261,000  
Operating Segments [Member]                      
Segment Reporting Information [Line Items]                      
Operating Income 4,671,000       2,660,000       11,802,000 11,854,000  
Operating Segments [Member] | Product Identification [Member]                      
Segment Reporting Information [Line Items]                      
Operating Income 2,960,000       1,818,000       6,019,000 8,952,000  
Operating Segments [Member] | T&M [Member]                      
Segment Reporting Information [Line Items]                      
Operating Income 1,711,000       842,000       5,783,000 2,902,000  
Corporate Expenses [Member]                      
Segment Reporting Information [Line Items]                      
Corporate Expenses $ 3,325,000       $ 2,364,000       $ 8,456,000 $ 7,372,000