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Note 17 - Stock-based Compensation Plans - Summary of Nonvested Share (Details) - $ / shares | 12 Months Ended
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Jan. 31, 2020 | Jan. 31, 2019 | Jan. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross | 367,173 | 272,144 | 274,500
Granted, Weighted- Average Grant-Date Fair Value per Share (in dollars per share) | $ 8.99 | $ 7.10 | $ 5.26
Shareholder-Approved Stock Option Plan [Member] |  |  |
Stock Options Outstanding (in shares) | 325,218 | 276,067 |
Weighted- Average Grant-Date Fair Value per Share (in dollars per share) | $ 6.18 | $ 4.98 |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross | 367,173 | 272,144 |
Granted, Weighted- Average Grant-Date Fair Value per Share (in dollars per share) | $ 8.99 | $ 7.10 |
Vested (in shares) | (259,269) | (219,043) |
Vested, Weighted- Average Grant-Date Fair Value per Share (in dollars per share) | $ 6.96 | $ 5.56 |
Forfeited (in shares) | (23,469) | (3,950) |
Forfeited, Weighted- Average Grant-Date Fair Value per Share (in dollars per share) | $ 7.69 | $ 6.41 |
Stock Options Outstanding (in shares) | 409,653 | 325,218 | 276,067
Weighted- Average Grant-Date Fair Value per Share (in dollars per share) | $ 8.03 | $ 6.18 | $ 4.98

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- Definition Gross number of share options (or share units) granted during the period. + References No definition available. + 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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d)(1) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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