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Segment Information - Net Sales and Segment Operating Profit for Each Reporting Segment (Detail) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jul. 29, 2017 | Jul. 30, 2016 | Jul. 29, 2017 | Jul. 30, 2016
Segment Reporting Information [Line Items] |  |  |  |
Revenue | $ 27,483 | $ 25,339 | $ 51,941 | $ 49,449
Corporate Expenses | 2,327 | 2,025 | 4,183 | 3,676
Operating Income | 942 | 1,748 | 1,649 | 3,295
Other Income (Expense)-Net | 16 | 40 | (33) | (12)
Income Before Income Taxes | 958 | 1,788 | 1,616 | 3,283
Income Tax Provision | 231 | 496 | 378 | 972
Net Income | 727 | 1,292 | 1,238 | 2,311
Operating Segments [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Operating Income | 3,269 | 3,773 | 5,832 | 6,971
Operating Segments [Member] | Product Identification [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenue | 20,841 | 17,628 | 39,487 | 34,234
Operating Income | 2,612 | 2,632 | 5,104 | 4,628
Operating Segments [Member] | T&M [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenue | 6,642 | 7,711 | 12,454 | 15,215
Operating Income | 657 | 1,141 | 728 | 2,343
Corporate Expenses [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Corporate Expenses | $ 2,327 | $ 2,025 | $ 4,183 | $ 3,676

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