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Consolidated Statements of Income - USD ($)
$ in Thousands
 12 Months Ended
Jan. 31, 2017
Jan. 31, 2016
Jan. 31, 2015
Income Statement [Abstract]      
Revenue $ 98,448 $ 94,658 $ 88,347
Cost of Revenue 58,959 56,500 51,370
Gross Profit 39,489 38,158 36,977
Costs and Expenses:      
Selling and Marketing 18,955 18,249 18,289
Research and Development 6,314 6,945 5,802
General and Administrative 7,939 7,030 5,655
Operating Expenses 33,208 32,224 29,746
Operating Income 6,281 5,934 7,231
Other Income (Expense):      
Investment Income 78 72 81
Other, Net 246 903 (380)
Other Income (Expense)-Net 324 975 (299)
Income before Income Taxes 6,605 6,909 6,932
Income Tax Provision 2,377 2,384 2,270
Net Income $ 4,228 $ 4,525 $ 4,662
Net Income Per Common Share-Basic $ 0.57 $ 0.62 $ 0.61
Net Income Per Common Share-Diluted $ 0.56 $ 0.61 $ 0.60
Weighted Average Number of Common Shares Outstanding-Basic 7,421 7,288 7,612
Dilutive Effect of Common Stock Equivalents 151 183 222
Weighted Average Number of Common Shares Outstanding-Diluted 7,572 7,471 7,834
Dividends Declared Per Common Share $ 0.28 $ 0.28 $ 0.28