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Consolidated Statements of Operations (USD $)
In Thousands, except Per Share data, unless otherwise specified
 3 Months Ended
Apr. 30, 2014
Apr. 30, 2013
Income Statement [Abstract]    
Net sales $ 23,530 $ 19,890
Costs of goods sold 15,353 13,481
Gross profit 8,177 6,409
Selling, general and administrative expenses 11,722 10,565
Interest expense, net 329 328
Income (loss) before income taxes (3,874) (4,484)
Income tax expense (benefit) (19) (37)
Net income (loss) $ (3,855) $ (4,447)
Net income (loss) per common share:    
Basic $ (0.26) [1] $ (0.31) [1]
Diluted $ (0.26) [1] $ (0.31) [1]
Weighted average shares outstanding:    
Basic 14,718 [2] 14,441 [2]
Diluted 14,718 14,441
[1] Net loss per share was calculated based on basic shares outstanding due to the anti-dilutive effect on the inclusion of common stock equivalent shares.
[2] Certain exercisable and non-exercisable stock options were not included in the computation of diluted net loss per share at April 30, 2014 and 2013, because their inclusion would have been anti-dilutive. The number of stock options outstanding, which met this anti-dilutive criterion for the three months ended April 30, 2014 and 2013, was 266,000 and 203,000, respectively.