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Stock options Unvested options (Tables) | 12 Months Ended
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Jan. 31, 2017
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 on January 31, 2016 | 166 |  | $9.51 | $3
Granted | 22 |  | 7.33 |  |
Vested | (72 | ) |  |
Expired or forfeited | (42 | ) | 8.98 |  |
Outstanding on January 31, 2017 | 74 |  | $9.31 | $69

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- Definition Unvested options [Abstract] + References No definition available. + Details
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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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