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Segment Data (Details) (USD $) | 3 Months Ended | 9 Months Ended
--- | --- | ---
Oct. 31, 2014 | Oct. 31, 2013 | Oct. 31, 2014 | Oct. 31, 2013
Segment Reporting Information [Line Items] |  |  |  |
Net sales | $ 25,092,772 | $ 22,787,344 | $ 73,210,278 | $ 69,163,340
Sales Revenue, Percentage | 100.00% | 100.00% | 100.00% | 100.00%
Domestic [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Net sales | 13,000,000 | 11,470,000 | 37,160,000 | 35,650,000
Sales Revenue, Percentage | 51.80% | 50.30% | 50.80% | 51.60%
International [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Net sales | $ 12,090,000 | $ 11,320,000 | $ 36,050,000 | $ 33,510,000
Sales Revenue, Percentage | 48.20% | 49.70% | 49.20% | 48.40%

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