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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%