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Segment Information - Net Sales and Segment Operating Profit (Loss) for Each Reporting Segment (Detail) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Oct. 30, 2021
Jul. 31, 2021
May 01, 2021
Oct. 31, 2020
Aug. 01, 2020
May 02, 2020
Oct. 30, 2021
Oct. 31, 2020
Segment Reporting Information [Line Items]                
Revenue $ 28,857     $ 28,017     $ 87,780 $ 86,595
Corporate Expenses 2,364     2,353     7,372 7,214
Operating Income 296     417     4,482 1,285
Other Income (Expense), Net (895)     (437)     3,002 (459)
Income (Loss) Before Income Taxes (599)     (20)     7,484 826
Income Tax Provision (Benefit) (174)     (32)     297 379
Net Income (Loss) (425) $ 7,019 $ 593 12 $ 3 $ 432 7,187 447
Product Identification [Member]                
Segment Reporting Information [Line Items]                
Revenue 21,928     22,898     68,519 66,907
T&M [Member]                
Segment Reporting Information [Line Items]                
Revenue 6,929     5,119     19,261 19,688
Operating Segments [Member]                
Segment Reporting Information [Line Items]                
Operating Income 2,660     2,770     11,854 8,499
Operating Segments [Member] | Product Identification [Member]                
Segment Reporting Information [Line Items]                
Operating Income 1,818     3,521     8,952 9,813
Operating Segments [Member] | T&M [Member]                
Segment Reporting Information [Line Items]                
Operating Income 842     (751)     $ 2,902 $ (1,314)
Corporate Expenses [Member]                
Segment Reporting Information [Line Items]                
Corporate Expenses $ 2,364     $ 2,353