Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Jan. 31, 2016	Jan. 31, 2015
Income Statement [Abstract]
Net Sales	$ 94,658	$ 88,347
Cost of Sales	56,500	51,370
Gross Profit	38,158	36,977
Costs and Expenses:
Selling and Marketing	18,249	18,289
Research and Development	6,945	5,802
General and Administrative	7,030	5,655
Operating Expenses	32,224	29,746
Operating Income	5,934	7,231
Other Income (Expense):
Investment Income	72	81
Other, Net	903	(380)
Other Income (Expense)	975	(299)
Income before Income Taxes	6,909	6,932
Income Tax Provision	2,384	2,270
Net Income	$ 4,525	$ 4,662
Net Income Per Common Share-Basic	$ 0.62	$ 0.61
Net Income Per Common Share-Diluted	$ 0.61	$ 0.60
Weighted Average Number of Common Shares Outstanding-Basic	7,288	7,612
Dilutive Effect of Common Stock Equivalents	183	222
Weighted Average Number of Common Shares Outstanding-Diluted	7,471	7,834
Dividends Declared Per Common Share	$ 0.28	$ 0.28