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Note 14 - Share Capital (Details Textual) - USD ($) $ in Millions |  | 12 Months Ended
--- | --- | ---
Apr. 18, 2016 | Jan. 31, 2017 | Jan. 31, 2016 | Jan. 31, 2015
Proceeds from Stock Options Exercised |  | $ 0.6 | $ 0.2 | $ 0.9
Shelf Prospectus [Member] |  |  |  |
Shelf Prospectus Period | 2 years 30 days |  |  |
Shelf Prospectus, Maximum Amount | $ 500.0 |  |  |

X
- Definition The maximum amount related to the shelf prospectus. + References No definition available. + Details
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X
- Definition The duration of the shelf prospectus. + References No definition available. + Details
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- Definition The cash inflow associated with the amount received from holders exercising their stock options. This item inherently excludes any excess tax benefit, which the entity may have realized and reported separately. + 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 (j) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3255-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 + Details
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