Nature of Operations, Segment Reporting and Geographical Information - Net Sales and Segment Operating Profit (loss) for Each Reporting Segment (Detail) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2023	Jan. 31, 2022	Jan. 31, 2021
Segment Reporting Information [Line Items]
Revenue	$ 142,527	$ 117,480	$ 116,033
Corporate Expenses	11,435	9,553	9,420
Operating Income	5,443	4,256	2,433
Other Income (Expense), Net	$ (2,033)	$ 2,778	$ (254)
Segment Operating Profit % of Net Sales	11.80%	11.80%	10.20%
Income before Income Taxes	$ 3,410	$ 7,034	$ 2,179
Income Tax Provision	749	605	895
Net Income	2,661	6,429	1,284
Operating Segments [Member]
Segment Reporting Information [Line Items]
Operating Income	16,878	13,809	11,853
Operating Segments [Member] | Product Identification [Member]
Segment Reporting Information [Line Items]
Revenue	103,089	90,915	90,268
Operating Income	$ 7,889	$ 10,411	$ 12,885
Segment Operating Profit % of Net Sales	7.70%	11.50%	14.30%
Operating Segments [Member] | T&M [Member]
Segment Reporting Information [Line Items]
Revenue	$ 39,438	$ 26,565	$ 25,765
Operating Income	$ 8,989	$ 3,398	$ (1,032)
Segment Operating Profit % of Net Sales	22.80%	12.80%	(4.00%)
Corporate Expenses [Member]
Segment Reporting Information [Line Items]
Corporate Expenses	$ 11,435	$ 9,553	$ 9,420