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Segment Information - Net Sales and Segment Operating Profit for Each Reporting Segment (Detail) - USD ($) $ in Thousands	3 Months Ended						9 Months Ended
	Nov. 02, 2019	Aug. 03, 2019	May 04, 2019	Oct. 27, 2018	Jul. 28, 2018	Apr. 28, 2018	Nov. 02, 2019	Oct. 27, 2018
Segment Reporting Information [Line Items]
Revenue	$ 33,318			$ 34,196			$ 102,967	$ 99,490
Corporate Expenses	2,830			2,836			8,445	8,298
Operating Income	447			2,362			4,078	5,791
Other Expense, Net	(238)			(538)			(788)	(1,320)
Income before Income Taxes	209			1,824			3,290	4,471
Income Tax (Benefit) Provision	(247)			407			182	1,046
Net Income	456	$ 951	$ 1,700	1,417	$ 1,194	$ 814	3,108	3,425
Product Identification [Member]
Segment Reporting Information [Line Items]
Revenue	21,749			21,684			67,484	63,407
T&M [Member]
Segment Reporting Information [Line Items]
Revenue	11,569			12,512			35,483	36,083
Operating Segments [Member]
Segment Reporting Information [Line Items]
Operating Income	3,277			5,198			12,523	14,089
Operating Segments [Member] \| Product Identification [Member]
Segment Reporting Information [Line Items]
Operating Income	1,880			2,014			6,990	5,833
Operating Segments [Member] \| T&M [Member]
Segment Reporting Information [Line Items]
Operating Income	$ 1,397			$ 3,184			$ 5,533	$ 8,256