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Derivative Instruments and Foreign Currency Exposure (Details Textual) (USD $)
3 Months Ended 9 Months Ended
Oct. 31, 2014
Oct. 31, 2013
Oct. 31, 2014
Oct. 31, 2013
Derivative [Line Items]        
Foreign Currency Transaction Gain (Loss), Before Tax $ (65,137) $ 115,764 $ (51,882) $ (271,647)
Derivative Financial Instruments, Assets [Member]
       
Derivative [Line Items]        
Foreign Currency Transaction Gain (Loss), Before Tax     9,260  
Other Assets $ 2,300,000 $ 0 $ 2,300,000 $ 0