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Note 16 - Stock-based Compensation Plans - Summary of Nonvested Share (Details) - $ / shares | 12 Months Ended
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Jan. 31, 2018 | Jan. 31, 2017 | Jan. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross | 274,500 | 170,932 | 0
Granted, Weighted- Average Grant-Date Fair Value per Share (in dollars per share) | $ 5.26 | $ 4.46 | $ 0
Granted, shares (in shares) | 274,500 | 170,932 | 0
Shareholder-Approved Stock Option Plan [Member] |  |  |
Stock Options Outstanding (in shares) | 152,292 | 53,578 |
Weighted- Average Grant-Date Fair Value per Share (in dollars per share) | $ 4.12 | $ 2.52 |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross | 274,500 | 170,932 |
Granted, Weighted- Average Grant-Date Fair Value per Share (in dollars per share) | $ 5.26 | $ 4.46 |
Vested (in shares) | (149,225) | (72,218) |
Vested, Weighted- Average Grant-Date Fair Value per Share (in dollars per share) | $ 4.70 | $ 3.70 |
Granted, shares (in shares) | 274,500 | 170,932 |
Forfeited (in shares) | (1,500) |  |
Forfeited, Weighted- Average Grant-Date Fair Value per Share (in dollars per share) | $ 5.25 |  |
Stock Options Outstanding (in shares) | 276,067 | 152,292 | 53,578
Weighted- Average Grant-Date Fair Value per Share (in dollars per share) | $ 4.98 | $ 4.12 | $ 2.52

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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://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=96867065&loc=d3e5070-113901 + Details
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- Definition Weighted average grant-date fair value of non-vested options forfeited. + References No definition available. + Details
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