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Segment Information - Net Sales and Segment Operating Profit (Loss) for Each Reporting Segment (Detail) - USD ($)
 3 Months Ended
May 01, 2021
May 02, 2020
Segment Reporting Information [Line Items]    
Revenue $ 29,078,000 $ 30,919,000
Corporate Expenses 2,344,000 2,327,000
Operating Income 735,000 663,000
Other Expense, Net 369,000 349,000
Income Before Income Taxes 366,000 314,000
Income Tax Benefit (227,000) (118,000)
Net Income 593,000 432,000
Product Identification [Member]    
Segment Reporting Information [Line Items]    
Revenue 23,098,000 22,380,000
T&M [Member]    
Segment Reporting Information [Line Items]    
Revenue 5,980,000 8,539,000
Operating Segments [Member]    
Segment Reporting Information [Line Items]    
Operating Income 3,079,000 2,990,000
Operating Segments [Member] | Product Identification [Member]    
Segment Reporting Information [Line Items]    
Operating Income 2,729,000 3,146,000
Operating Segments [Member] | T&M [Member]    
Segment Reporting Information [Line Items]    
Operating Income 350,000 (156,000)
Corporate Expenses [Member]    
Segment Reporting Information [Line Items]    
Corporate Expenses $ 2,344,000 $ 2,327,000