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Derivative Instruments and Foreign Currency Exposure (Tables) | 6 Months Ended
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Jul. 31, 2013
Derivative Instruments and Hedging Activities Disclosure [Abstract] |
Schedule of Notional Amounts of Outstanding Derivative Positions [Table Text Block] |
Our hedge positions are summarized below: Fair Value of Derivative Instruments Derivatives not designated as hedging instruments Foreign Exchange Forward Contracts
|  | Three Months Ended |  | Six Months Ended |
|  | July 31, 2013 |  | July 31, 2012 |  | July 31, 2013 |  | July 31, 2012 |
Notional Value in USD |  | $ | 1,000,000 |  | $ | 22,822,770 |  | $ | 5,587,136 |  | $ | 25,325,540 |
Gain and loss reported in current operating income (expense) |  | $ | 92,818 |  | $ | 1,647 |  | $ | 122,697 |  | $ | (55,614) |
There is no outstanding balance from foreign exchange forward contracts as of July 31, 2013 or July 31, 2012. Derivatives designated as hedging instruments Asset Derivative from Foreign Currency Cash Flow Hedge
|  | As of July 31, 2013 |  | As of January 31, 2013 |
Notional value in USD |  | $ | 300,000 |  | $ | 6,944,040 |
Gain reported in equity as other comprehensive income |  |  | 4,722 |  |  | 38,513 |
Effect of Derivative on Income Statement from Foreign Currency Cash Flow Hedge
|  | Six Months Ended July 31, 2013 |  | Six Months Ended July 31, 2012 |
Gain reclassed from other comprehensive income into current earnings during three months ended July 31, 2013, reported in operating income |  | $ | 160,032 |  | $ | 32,485 |

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- Definition Tabular disclosure of the notional amounts of outstanding derivative positions. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5579245-113959 + Details
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