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Note 16 - Stock-based Compensation Plans (Details Textual) - USD ($) $ / shares in Units, $ in Thousands | 12 Months Ended
--- | ---
Jan. 31, 2018 | Jan. 31, 2017 | Jan. 31, 2016
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Share-based Compensation Cost | $ 600 | $ 100 |
Employee Service Share-based Compensation, Tax Benefit from Exercise of Stock Options | $ 1,600 | $ 1,600 | $ 1,600
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number | 657,209 | 526,321 | 468,889
Stock Issued During Period, Shares, Stock Options Settled for Cash and Shares Issued from Treasury, Shares | 0 | 0 | 446,875
Common Shares Settlement of Stock Options |  |  | $ 4,400
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross | 274,500 | 170,932 | 0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value | $ 5.26 | $ 4.46 | $ 0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value | $ 2,500 | $ 1,800 | $ 500
Share Based Compensation Arrangement by Share Based Payment Award Options, Settled in Period Total Intrinsic Value | 0 | $ 0 | 6,700
Less Than [Member] |  |  |
Cash Settlement of Stock Options |  |  | 2,600
Employee Stock Option [Member] |  |  |
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized | $ 1,600 |  |
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition | 1 year 36 days |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested in Period, Fair Value | $ 800 |  |
Performance Shares [Member] |  |  |
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized | $ 1,600 |  |
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 | $ 1,700 |  |
Restricted Stock Units (RSUs) [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 255 days |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value | $ 800 |  |
Shareholder-Approved Stock Option Plan [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number | 520,709 |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross | 274,500 | 170,932 |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value | $ 5.26 | $ 4.46 |
Shareholder-Approved Stock Option Plan [Member] | Employee Stock Option [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant | 4,273,332 |  |
Outside of Shareholder-approved Stock Option Plan [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number | 136,500 |  |
Other than Shareholder-approved Stock Option Plan [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross | 175,000 |  |
Deferred Share Unit Plan [Member] |  |  |
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized | $ 0 | $ 0 |
Deferred Share Units Outstanding Number | 242,082 | 241,482 |
Deferred Compensation Share-based Arrangements, Liability, Current and Noncurrent | $ 6,800 | $ 5,200 |
Deferred Share Units Grants In Period | 43,606 |  |
Deferred Share Units Redeemed and Settled in Cash | 43,006 |  |
Deferred Share Units Compensation Expense | $ 2,300 | 1,600 | 1,900
Cash-Settled Restricted Share Unit [Member] |  |  |
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized | 900 | 900 |
Deferred Compensation Share-based Arrangements, Liability, Current and Noncurrent | 800 | 800 |
Cash Settled Restricted Share Units Compensation Expense | $ 1,000 | $ 800 | $ 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=96867065&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=96867065&loc=d3e5070-113901 + Details
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