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Condensed Consolidated Statements of Income - USD ($)
 3 Months Ended 9 Months Ended
Oct. 27, 2018
Oct. 28, 2017
Oct. 27, 2018
Oct. 28, 2017
Income Statement [Abstract]        
Revenue $ 34,196,000 $ 28,760,000 $ 99,490,000 $ 80,701,000
Cost of Revenue 20,288,000 16,966,000 60,073,000 49,342,000
Gross Profit 13,908,000 11,794,000 39,417,000 31,359,000
Operating Expenses:        
Selling and Marketing 6,587,000 5,532,000 19,484,000 15,958,000
Research and Development 2,123,000 2,033,000 5,844,000 5,340,000
General and Administrative 2,836,000 2,597,000 8,298,000 6,780,000
Operating Expenses 11,546,000 10,162,000 33,626,000 28,078,000
Operating Income, net 2,362,000 1,632,000 5,791,000 3,281,000
Other Income (Expense) (538,000) (12,000) (1,320,000) (45,000)
Income before Income Taxes 1,824,000 1,620,000 4,471,000 3,236,000
Income Tax Provision 407,000 201,000 1,046,000 579,000
Net Income $ 1,417,000 $ 1,419,000 $ 3,425,000 $ 2,657,000
Net Income per Common Share—Basic: $ 0.21 $ 0.21 $ 0.50 $ 0.38
Net Income per Common Share—Diluted: $ 0.20 $ 0.21 $ 0.49 $ 0.38
Weighted Average Number of Common Shares Outstanding:        
Basic 6,924,554 6,725,414 6,858,365 6,968,285
Diluted 7,166,628 6,820,921 7,056,125 7,082,361
Dividends Declared Per Common Share $ 0.07 $ 0.07 $ 0.21 $ 0.21