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Interest expense, net | 12 Months Ended
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Jan. 31, 2012
Interest Expense, Net [Abstract] |
Interest Income and Interest Expense Disclosure [Text Block] | Note 12 - Interest expense, net
| 2011 |  | 2010 |  |
Interest expense | $2,165 | $1,937 |
Interest income | (728 | ) | (676 | ) |
Interest expense, net | $1,437 | $1,261 |

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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 SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 1 - 9 -Article 9 Reference 2: 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 + Details
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