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Note 17 - Stock-based Compensation Plans (Details Textual) - USD ($) $ / shares in Units, $ in Thousands | 12 Months Ended
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Jan. 31, 2020 | Jan. 31, 2019 | Jan. 31, 2018
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Share-based Compensation Cost | $ 700 | $ 600 |
Share-based Payment Arrangement, Exercise of Option, Tax Benefit | $ 100 | $ 200 |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number, Ending Balance | 1,127,822 | 879,338 | 657,209
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross | 367,173 | 272,144 | 274,500
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value | $ 8.99 | $ 7.10 | $ 5.26
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value | $ 2,000 | $ 800 | $ 2,500
Share-based Payment Arrangement, Option [Member] |  |  |
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount, Total | $ 3,500 |  |
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition | 2 years 292 days |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested in Period, Fair Value | $ 1,900 |  |
Performance Shares [Member] |  |  |
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount, Total | $ 2,700 |  |
Share-based Payment Arrangement, Nonvested Award, 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 | $ 2,600 |  |
Restricted Stock Units (RSUs) [Member] |  |  |
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount, Total | $ 1,300 |  |
Share-based Payment Arrangement, Nonvested Award, 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 | $ 1,100 |  |
Option Granted Outside of Shareholder-approved Stock Option Plan [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number, Ending Balance | 1,021,322 |  |
Option Granted Outside of Shareholder-approved Stock Option Plan [Member] | Share-based Payment Arrangement, Option [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant | 3,661,684 |  |
Outside of Shareholder-approved Stock Option Plan [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number, Ending Balance | 106,500 |  |
Deferred Share Unit Plan [Member] |  |  |
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount, Total | $ 0 | $ 0 |
Deferred Share Units Outstanding Number | 251,422 | 277,390 |
Deferred Compensation Share-based Arrangements, Liability, Current and Noncurrent | $ 11,300 | $ 8,600 |
Deferred Share Units Grants In Period | 25,373 |  |
Deferred Share Units Redeemed and Settled in Cash | 51,341 |  |
Deferred Share Units Compensation Expense | $ 5,000 | 2,200 | 2,300
Cash-Settled Restricted Share Unit [Member] |  |  |
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount, Total | 1,100 | 800 |
Deferred Compensation Share-based Arrangements, Liability, Current and Noncurrent | 800 | 600 |
Cash Settled Restricted Share Units Compensation Expense | $ 900 | $ 800 | $ 1,000

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- Definition Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=116856206&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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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