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Stock options Unvested options (Tables) | 12 Months Ended
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Jan. 31, 2018
Unvested options [Abstract] |
Schedule of Nonvested Share Activity [Table Text Block] |
Unvested options outstanding (shares in thousands) | Options | Weighted-average grant date fair value | Aggregate intrinsic value
Outstanding on January 31, 2017 | 74 |  | $9.31 | $69
Granted | — |  | — |  |
Vested | (36 | ) |  |
Expired or forfeited | (7 | ) | 10.43 |  |
Outstanding on January 31, 2018 | 31 |  | $8.24 | $50

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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=96867065&loc=d3e5070-113901 + Details
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