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Derivative Instruments and Foreign Currency Exposure (Tables) | 9 Months Ended
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Oct. 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 October 31, |  | Nine Months Ended October 31, |
|  | 2013 |  | 2012 |  | 2013 |  | 2012 |
Notional Value in USD |  | $ | 1,000 |  | $ | 11,175 |  | $ | 6,587 |  | $ | 36,501 |
Gain and loss reported in current operating income (expense) |  | $ | (42) |  | $ | 205 |  | $ | 81 |  | $ | 261 |
There is no outstanding balance from foreign exchange forward contracts as of October 31, 2013 or 2012. Derivatives designated as hedging instruments Asset Derivative from Foreign Currency Cash Flow Hedge
|  | As of October 31, 2013 |  | As of January 31, 2013 |
Notional value in USD |  | $ | 412,440 |  | $ | 6,944,040 |
Gain reported in equity as other comprehensive income |  |  | (59,078) |  |  | 38,513 |
Effect of Derivative on Income Statement from Foreign Currency Cash Flow Hedge
|  | Nine Months Ended October 31, 2013 |  | Nine Months Ended October 31, 2012 |
Gain reclassifed from other comprehensive income into current earnings during three months ended October 31, 2013, reported in operating income |  | $ | 85 |  | $ | 33 |

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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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