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Stock options Unvested options (Tables) | 12 Months Ended
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Jan. 31, 2013
Unvested options [Abstract] |
Schedule of Nonvested Share Activity [Table Text Block] |
Unvested options outstanding | Options |  | Weighted-average grant date fair value |  | Aggregate intrinsic value
Outstanding at beginning of year | 373 |  | $7.84 | $212
Granted | 173 |  | 6.78 |  |
Vested | (152 | ) |  |
Expired or forfeited | (11 | ) | 7.06 |  |
Outstanding at end of year | 383 |  | $6.91 | $4

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- Definition Tabular disclosure of the changes in outstanding nonvested shares. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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