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Consolidated Statements of Income (USD $)
In Thousands, except Per Share data, unless otherwise specified
 12 Months Ended
Jan. 31, 2015
Jan. 31, 2014
Income Statement [Abstract]    
Net Sales $ 88,347us-gaap_SalesRevenueNet $ 68,592us-gaap_SalesRevenueNet
Cost of Sales 51,370us-gaap_CostOfGoodsSold 41,609us-gaap_CostOfGoodsSold
Gross Profit 36,977us-gaap_GrossProfit 26,983us-gaap_GrossProfit
Costs and Expenses:    
Selling and Marketing 18,289us-gaap_SellingAndMarketingExpense 14,774us-gaap_SellingAndMarketingExpense
Research and Development 5,802us-gaap_ResearchAndDevelopmentExpense 5,072us-gaap_ResearchAndDevelopmentExpense
General and Administrative 5,655us-gaap_GeneralAndAdministrativeExpense 5,604us-gaap_GeneralAndAdministrativeExpense
Operating Expenses 29,746us-gaap_OperatingExpenses 25,450us-gaap_OperatingExpenses
Operating Income 7,231us-gaap_OperatingIncomeLoss 1,533us-gaap_OperatingIncomeLoss
Other Income (Expense):    
Investment Income 81us-gaap_InvestmentIncomeNet 72us-gaap_InvestmentIncomeNet
Other, Net (380)us-gaap_OtherNonoperatingIncomeExpense (193)us-gaap_OtherNonoperatingIncomeExpense
Other Income (Expense) (299)us-gaap_NonoperatingIncomeExpense (121)us-gaap_NonoperatingIncomeExpense
Income from Continuing Operations before Income Taxes 6,932us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments 1,412us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
Income Tax Provision for Continuing Operations 2,270us-gaap_IncomeTaxExpenseBenefit 175us-gaap_IncomeTaxExpenseBenefit
Income from Continuing Operations 4,662us-gaap_IncomeLossFromContinuingOperations 1,237us-gaap_IncomeLossFromContinuingOperations
Income from Discontinued Operations, Net of Taxes of $777 in 2014   1,975us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity
Net Income $ 4,662us-gaap_NetIncomeLoss $ 3,212us-gaap_NetIncomeLoss
Net Income per Common Share-Basic:    
From Continuing Operations $ 0.61us-gaap_IncomeLossFromContinuingOperationsPerBasicShare $ 0.17us-gaap_IncomeLossFromContinuingOperationsPerBasicShare
From Discontinued Operations   $ 0.26us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare
Net Income Per Common Share-Basic $ 0.61us-gaap_EarningsPerShareBasic $ 0.43us-gaap_EarningsPerShareBasic
Net Income per Common Share-Diluted:    
From Continuing Operations $ 0.60us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare $ 0.16us-gaap_IncomeLossFromContinuingOperationsPerDilutedShare
From Discontinued Operations   $ 0.26us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare
Net Income Per Common Share-Diluted $ 0.60us-gaap_EarningsPerShareDiluted $ 0.42us-gaap_EarningsPerShareDiluted
Weighted Average Number of Common Shares Outstanding-Basic 7,612us-gaap_WeightedAverageNumberOfSharesOutstandingBasic 7,470us-gaap_WeightedAverageNumberOfSharesOutstandingBasic
Dilutive Effect of Common Stock Equivalents 222us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment 227us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment
Weighted Average Number of Common Shares Outstanding-Diluted 7,834us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding 7,697us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding
Dividends Declared Per Common Share $ 0.28us-gaap_CommonStockDividendsPerShareDeclared $ 0.28us-gaap_CommonStockDividendsPerShareDeclared