Segment Information - Net Sales and Segment Operating Profit for Each Reporting Segment (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 28, 2017	Oct. 29, 2016	Oct. 28, 2017	Oct. 29, 2016
Segment Reporting Information [Line Items]
Revenue	$ 28,760	$ 23,342	$ 80,701	$ 72,791
Corporate Expenses	2,597	1,891	6,780	5,566
Operating Income	1,632	1,834	3,281	5,128
Other Expense, Net	(12)	(60)	(45)	(72)
Income Before Income Taxes	1,620	1,774	3,236	5,056
Income Tax Provision	201	623	579	1,595
Net Income	1,419	1,151	2,657	3,461
Operating Segments [Member]
Segment Reporting Information [Line Items]
Operating Income	4,229	3,725	10,061	10,694
Operating Segments [Member] | Product Identification [Member]
Segment Reporting Information [Line Items]
Revenue	20,458	16,892	59,945	51,126
Operating Income	2,657	2,443	7,761	7,069
Operating Segments [Member] | T&M [Member]
Segment Reporting Information [Line Items]
Revenue	8,302	6,450	20,756	21,665
Operating Income	1,572	1,282	2,300	3,625
Corporate Expenses [Member]
Segment Reporting Information [Line Items]
Corporate Expenses	$ 2,597	$ 1,891	$ 6,780	$ 5,566