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Consolidated Statements of Income (USD $)
In Thousands, except Share data, unless otherwise specified
 12 Months Ended
Jan. 31, 2013
Jan. 31, 2012
Consolidated Statements of Income [Abstract]    
Net Sales $ 61,224 $ 60,724
Cost of Sales 37,496 38,653
Gross Profit 23,728 22,071
Costs and Expenses:    
Selling and Marketing 12,412 12,777
Research and Development 3,816 4,323
General and Administrative 4,574 3,962
Operating Expenses 20,802 21,062
Loss on Sale of Asheboro Operations   (681)
Operating Income 2,926 328
Other Income (Expense):    
Investment Income 55 82
Other, Net (96) 234
Other Income (Expense) (41) 316
Income from Continuing Operations before Income Taxes 2,885 644
Income Tax Provision (Benefit) for Continuing Operations 847 (97)
Income from Continuing Operations 2,038 741
Income from Discontinued Operations, net of taxes of $5,351 in 2013 and $1,198 in 2012 8,729 2,391
Net Income $ 10,767 $ 3,132
Net Income per Common Share - Basic:    
From Continuing Operations $ 0.28 $ 0.10
From Discontinued Operations $ 1.18 $ 0.33
Net Income Per Common Share - Basic $ 1.46 $ 0.43
Net Income per Common Share - Diluted:    
From Continuing Operations $ 0.27 $ 0.10
From Discontinued Operations $ 1.17 $ 0.32
Net Income Per Common Share - Diluted $ 1.44 $ 0.42
Weighted Average Number of Common Shares Outstanding - Basic 7,396 7,325
Dilutive effect of options outstanding 87 104
Weighted Average Number of Common Shares Outstanding - Diluted 7,483 7,429
Dividends Declared Per Common Share $ 0.35 $ 0.28