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Note 16 - Stock-based Compensation Plans (Details) - Summary of Performance Share Units Activity - USD ($) $ / shares in Units, $ in Millions | 12 Months Ended
--- | ---
Jan. 31, 2016 | Jan. 31, 2015
Note 16 - Stock-based Compensation Plans (Details) - Summary of Performance Share Units Activity [Line Items] |  |
Vested or expected to vest at January 31, 2016 | 450,589 |
Vested or expected to vest at January 31, 2016 | $ 8.18 |
Vested or expected to vest at January 31, 2016 | 3 years 6 months |
Vested or expected to vest at January 31, 2016 | $ 5.0 |
Performance Shares [Member] |  |
Note 16 - Stock-based Compensation Plans (Details) - Summary of Performance Share Units Activity [Line Items] |  |
Number of Units Outstanding | 174,258 | 211,428
Weighted-Average Grant Date Fair Value | $ 12.61 | $ 11.69
Weighted-Average Remaining Contractual Life (years) | 7 years 73 days | 7 years 328 days
Aggregate Intrinsic Value (in millions) | $ 4.9 | $ 3.0
Vested or expected to vest at January 31, 2016 | 253,537 |
Vested or expected to vest at January 31, 2016 | $ 12.39 |
Vested or expected to vest at January 31, 2016 | 7 years 73 days |
Vested or expected to vest at January 31, 2016 | $ 4.9 |
Exercisable at January 31, 2016 | 152,598 |
Exercisable at January 31, 2016 | $ 9.36 |
Exercisable at January 31, 2016 | 6 years 109 days |
Exercisable at January 31, 2016 | $ 2.9 |
Number of PSUs Granted | 49,187 | 51,752
PSUs Granted, Weighted-Average Granted Date Fair Value | $ 19.70 | $ 16.67
Performance units issued | 30,092 |
Performance units issued | $ 9.34 |
Exercised |  | (83,984)
Exercised |  | $ 10.88
Forfeited |  | (4,938)
Forfeited |  | $ 10.93
Number of Units Outstanding | 253,537 | 174,258
Weighted-Average Grant Date Fair Value | $ 12.39 | $ 12.61

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- Definition The number of units exercisable other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + References No definition available. + Details
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- Definition The weighted average fair value of exercisable awards on equity-based plans excluding option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, revenue or profit achievement stock award plan) for which the employer is contingently obligated to issue equity instruments or transfer assets to an employee who has not yet satisfied service or performance criteria necessary to gain title to proceeds from the sale of the award or underlying shares or units. + References No definition available. + Details
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- Definition Intrinsic value of equity-based compensation awards exercisable. Excludes stock and unit options. + References No definition available. + Details
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- Definition Weighted average remaining contractual term for vested portions of equity instruments other than options outstanding and currently exercisable or convertible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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- Definition The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period. + 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)(1)(iv)(3) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event. + 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)(iii)(3) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + 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)(iii)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + 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)(iii)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The weighted average fair value of nonvested awards on equity-based plans excluding option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, revenue or profit achievement stock award plan) for which the employer is contingently obligated to issue equity instruments or transfer assets to an employee who has not yet satisfied service or performance criteria necessary to gain title to proceeds from the sale of the award or underlying shares or units. + 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)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Number of non-option equity instruments exercised by participants. + 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)(1)(iv)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Amount by which the current fair value of the underlying stock exceeds the exercise price of fully vested and expected to vest options outstanding. + 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 (e) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Number of share instruments newly issued under a share-based compensation plan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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