Derivative Instruments and Foreign Currency Exposure (Details Textual) - USD ($)	6 Months Ended
	Jul. 31, 2015	Jul. 31, 2014
Derivative [Line Items]
Other Comprehensive Income, Other, Net of Tax	$ 147,181	$ 147,181
Derivative Financial Instruments, Assets [Member]
Derivative [Line Items]
Other Assets	$ 3,400,000	$ 3,600,000