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Note 16 - Stock-based Compensation Plans - Summary of Nonvested Share (Details) - $ / shares	12 Months Ended
	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

X

- Definition

Gross number of share options (or share units) granted during the period.

+ References

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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

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- Definition

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Weighted average grant-date fair value of non-vested options forfeited.

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Weighted average grant-date fair value of non-vested options outstanding.

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