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Condensed Consolidated Statements of Operations (Unaudited) (USD $)
 3 Months Ended 6 Months Ended
Jul. 28, 2012
Jul. 30, 2011
Jul. 28, 2012
Jul. 30, 2011
Condensed Consolidated Statements of Operations [Abstract]        
Net Sales $ 19,572,354 $ 20,335,676 $ 37,997,129 $ 39,195,665
Cost of Sales 11,273,411 12,434,648 22,327,225 23,793,350
Gross Profit 8,298,943 7,901,028 15,669,904 15,402,315
Costs and Expenses:        
Selling and Marketing 4,298,151 4,526,112 8,541,732 9,091,650
General and Administrative 1,115,029 964,210 2,151,643 1,875,141
Research and Development 1,207,832 1,187,406 2,411,327 2,655,268
Operating Expenses 6,621,012 6,677,728 13,104,702 13,622,059
Operating Income 1,677,931 1,223,300 2,565,202 1,780,256
Other Income (Expense) (88,925) 296,962 (103,028) 447,282
Income Before Income Taxes 1,589,006 1,520,262 2,462,174 2,227,538
Income Tax Provision 602,233 474,423 638,586 750,260
Net Income $ 986,773 $ 1,045,839 $ 1,823,588 $ 1,477,278
Net Income per Common Share:        
Basic $ 0.13 $ 0.14 $ 0.25 $ 0.20
Diluted $ 0.13 $ 0.14 $ 0.24 $ 0.20
Weighted Average Number of Shares Outstanding:        
Basic 7,439,225 7,292,986 7,432,158 7,280,211
Diluted 7,491,160 7,445,536 7,488,985 7,423,539
Dividends Declared Per Common Share $ 0.07 $ 0.07 $ 0.14 $ 0.14