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Segment Data (Details) (USD $) | 3 Months Ended
--- | ---
Apr. 30, 2014 | Apr. 30, 2013
Segment Reporting Information [Line Items] |  |
Net sales | $ 23,507,228 | $ 21,736,990
Sales Revenue, Percentage | 100.00% | 100.00%
Domestic [Member] |  |
Segment Reporting Information [Line Items] |  |
Net sales | 12,200,000 | 11,860,000
Sales Revenue, Percentage | 51.89% | 56.56%
International [Member] |  |
Segment Reporting Information [Line Items] |  |
Net sales | $ 11,310,000 | $ 9,880,000
Sales Revenue, Percentage | 48.11% | 45.44%

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