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Derivative Instruments and Foreign Currency Exposure (Tables) | 9 Months Ended
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Oct. 31, 2012
Derivative Instruments and Hedging Activities Disclosure [Abstract] |
Schedule of Notional Amounts of Outstanding Derivative Positions [Table Text Block] | Our hedge positions are summarized below: Derivatives not designated as hedging instruments (in thousands) Foreign Exchange Forward Contracts
|  | Three Months Ended |  |  | Nine Months Ended |
|  | October 31, 2012 |  |  | October 31, 2011 |  |  | October 31, 2012 |  |  | October 31, 2011 |
Notional Value in USD |  | $ | 11,175 |  |  | $ | 3,444 |  |  | $ | 36,501 |  |  | $ | 9,950 |
Gain and loss reported in current operating income (expense) |  | $ | 205 |  |  | $ | 41 |  |  | $ | 261 |  |  | $ | (130 | )
Derivatives designated as hedging instruments (in thousands) Asset Derivative from Foreign Currency Cash Flow Hedge
|  | As of October 31, 2012 |  |  | As of January 31, 2012 |
Notional value in USD |  | $ | 6,777 |  |  | $ | 6,904 |
Gain and (loss) reported in equity as other comprehensive income |  | $ | 11 |  |  | $ | 123 |
Reported in Balance Sheet |  |  | Other payables |  |  |  | Other assets |
Effect of Derivative on Income Statement from Foreign Currency Cash Flow Hedge
|  | Nine Months Ended October 31, 2012 |  |  | Nine Months Ended October 31, 2011 |
Gain reclassed from other comprehensive income into current earnings during nine months ended October 31, 2012 reported in operating income |  | $ | 33 |  |  | $ | 30 |

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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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