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Interest expense, net | 6 Months Ended
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Jul. 31, 2015
Interest expense, net [Abstract] |
Interest Income and Interest Expense Disclosure [Text Block] | Interest expense, net.
| Three Months Ended July 31, | Six Months Ended July 31,
| 2015 |  | 2014 |  | 2015 |  | 2014 |
Interest expense |  | $269 |  |  | $391 |  |  | $537 |  |  | $743 |
Interest income | (17 | ) | (128 | ) | (291 | ) | (243 | )
Interest expense, net |  | $252 |  |  | $263 |  |  | $246 |  |  | $500 |

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- Definition Interest expense, net [Abstract] + References No definition available. + Details
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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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