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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
Aug. 03, 2024
Apr. 27, 2024
Jul. 29, 2023
Apr. 29, 2023
Aug. 03, 2024
Jul. 29, 2023
Segment Reporting Information [Line Items]            
Revenue $ 40,539,000   $ 35,524,000   $ 73,500,000 $ 70,943,000
Corporate Expenses 5,121,000   2,654,000   8,488,000 5,780,000
Operating Income (Expense) 1,061,000   (1,198,000)   2,407,000 264,000
Other Income (Expense), net (1,111,000)   (809,000)   (1,711,000) (1,244,000)
Income (Loss) Before Income Taxes (50,000)   (2,007,000)   696,000 (980,000)
Income Tax Provision (Benefit) 261,000   (390,000)   (173,000) (211,000)
Net Income (Loss) (311,000) $ 1,181,000 (1,617,000) $ 848,000 869,000 (769,000)
PI [Member]            
Segment Reporting Information [Line Items]            
Revenue 27,165,000   25,777,000   50,350,000 50,872,000
T&M [Member]            
Segment Reporting Information [Line Items]            
Revenue 13,374,000   9,747,000   23,150,000 20,071,000
Operating Segments [Member]            
Segment Reporting Information [Line Items]            
Operating Income (Expense) 6,182,000   1,456,000   10,895,000 6,044,000
Operating Segments [Member] | PI [Member]            
Segment Reporting Information [Line Items]            
Operating Income (Expense) 2,348,000   (461,000)   5,340,000 2,055,000
Operating Segments [Member] | T&M [Member]            
Segment Reporting Information [Line Items]            
Operating Income (Expense) 3,834,000   1,917,000   5,555,000 3,989,000
Corporate Expenses [Member]            
Segment Reporting Information [Line Items]            
Corporate Expenses $ 5,121,000   $ 2,654,000   $ 8,488,000 $ 5,780,000