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Note 16 - Stock-based Compensation Plans (Details Textual) - USD ($) $ / shares in Units, $ in Thousands | 12 Months Ended
--- | ---
Jan. 31, 2017 | Jan. 31, 2016 | Jan. 31, 2015
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Share-based Compensation Cost | $ 100 | $ 100 |
Employee Service Share-based Compensation, Tax Benefit Realized from Exercise of Stock Options |  | $ 1,600 | $ 100
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number | 526,321 | 468,889 | 953,264
Stock Issued During Period, Shares, Stock Options Settled for Cash and Shares Issued from Treasury, Shares | 0 | 446,875 |
Common Shares Settlement of Stock Options |  | $ 4,400 | $ 300
Cash Settlement of Stock Options |  |  | $ 400
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross | 170,932 | 0 | 215,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value | $ 4.46 | $ 0 | $ 3.47
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value | $ 1,800 | $ 500 | $ 2,400
Share Based Compensation Arrangement by Share Based Payment Award Options, Settled in Period Total Intrinsic Value | $ 0 | 6,700 | $ 1,600
Not Approved by Shareholders [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number | 175,000 |  | 175,000
Less Than [Member] |  |  |
Cash Settlement of Stock Options |  | 2,600 |
Shareholder-Approved Stock Option Plan [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross | 170,932 |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value | $ 4.46 |  |
Deferred Share Unit Plan [Member] |  |  |
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized | $ 0 | $ 0 |
Deferred Share Units Outstanding Number | 241,482 | 188,766 |
Deferred Compensation Share-based Arrangements, Liability, Current and Noncurrent | $ 5,200 | $ 3,300 |
Deferred Share Units Grants In Period | 52,716 |  |
Deferred Share Units Compensation Expense | $ 1,600 | 1,900 | $ 1,500
Cash-Settled Restricted Share Unit [Member] |  |  |
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized | 900 | 1,000 |
Deferred Compensation Share-based Arrangements, Liability, Current and Noncurrent | 800 | 800 |
Cash Settled Restricted Share Units Compensation Expense | $ 800 | $ 700 | $ 600
Shareholder-Approved Stock Option Plan [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number | 351,321 |  |
Employee Stock Option [Member] |  |  |
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized | $ 800 |  |
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition | 1 year 73 days |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested in Period, Fair Value | $ 400 |  |
Employee Stock Option [Member] | Shareholder-Approved Stock Option Plan [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant | 4,546,332 |  |
Performance Shares [Member] |  |  |
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized | $ 1,200 |  |
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition | 1 year 182 days |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value | $ 1,200 |  |
Restricted Stock Units (RSUs) [Member] |  |  |
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized | $ 700 |  |
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition | 1 year 219 days |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value | $ 700 |  |

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- Definition Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + 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 (i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Disclosure of the aggregate tax benefit realized from the exercise of stock options and the conversion of similar instruments during the annual 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 (j) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable. + 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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- Definition The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology. + 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 (d)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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