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Interest expense, net | 3 Months Ended
--- | ---
Apr. 30, 2015
Interest expense, net [Abstract] |
Interest Income and Interest Expense Disclosure [Text Block] | Interest expense, net.
| Three Months Ended April 30,
| 2015 |  | 2014 |
Interest expense |  | $268 |  |  | $352 |
Interest income | (274 | ) | (115 | )
Interest expense, net |  | ($6 | ) |  | $237 |

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- Definition The entire disclosure for interest income and interest expense for enterprises that derive a significant portion of their revenue from interest collected on investments, loans, and securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.1-12) -URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 1 - 9 -Article 9 + Details
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