Derivative Instruments and Foreign Currency Exposure (Details) (USD $)	3 Months Ended
Apr. 30, 2013	Apr. 30, 2012
Derivatives not designated as hedging instruments, Foreign Exchange Forward Contracts
Notional Value in USD	$ 4,587,136	$ 2,503,770
Gain and loss reported in current operating income (expense)	29,879	(57,261)
Derivatives designated as hedging instruments, Asset Derivative from Foreign Currency Cash Flow Hedge
Notional Value in USD	3,135,120	6,944,040
Gain reported in equity as other comprehensive income	88,261	38,513
Gain reclassed from other comprehensive income into current earnings during three months ended April 30, 2013, reported in operating income	$ 75,668	$ 22,329

Accumulated adjustment, net of tax, that results from the process of translating subsidiary financial statements and foreign equity investments into the reporting currency from the functional currency of the reporting entity, net of reclassification of realized foreign currency translation gains or losses.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

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+ Details

- Definition

The effective portion of gains and losses (net) on derivative instruments designated and qualifying as hedging instruments that was recognized in other comprehensive income during the current period.

+ References+ Details