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Note 16 - Stock-based Compensation Plans (Details) - Summary of Performance Share Units Activity - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Jan. 31, 2016	Jan. 31, 2015
Note 16 - Stock-based Compensation Plans (Details) - Summary of Performance Share Units Activity [Line Items]
Vested or expected to vest at January 31, 2016	450,589
Vested or expected to vest at January 31, 2016	$ 8.18
Vested or expected to vest at January 31, 2016	3 years 6 months
Vested or expected to vest at January 31, 2016	$ 5.0
Performance Shares [Member]
Note 16 - Stock-based Compensation Plans (Details) - Summary of Performance Share Units Activity [Line Items]
Number of Units Outstanding	174,258	211,428
Weighted-Average Grant Date Fair Value	$ 12.61	$ 11.69
Weighted-Average Remaining Contractual Life (years)	7 years 73 days	7 years 328 days
Aggregate Intrinsic Value (in millions)	$ 4.9	$ 3.0
Vested or expected to vest at January 31, 2016	253,537
Vested or expected to vest at January 31, 2016	$ 12.39
Vested or expected to vest at January 31, 2016	7 years 73 days
Vested or expected to vest at January 31, 2016	$ 4.9
Exercisable at January 31, 2016	152,598
Exercisable at January 31, 2016	$ 9.36
Exercisable at January 31, 2016	6 years 109 days
Exercisable at January 31, 2016	$ 2.9
Number of PSUs Granted	49,187	51,752
PSUs Granted, Weighted-Average Granted Date Fair Value	$ 19.70	$ 16.67
Performance units issued	30,092
Performance units issued	$ 9.34
Exercised		(83,984)
Exercised		$ 10.88
Forfeited		(4,938)
Forfeited		$ 10.93
Number of Units Outstanding	253,537	174,258
Weighted-Average Grant Date Fair Value	$ 12.39	$ 12.61

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Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were exercised during the period.

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Intrinsic value of equity-based compensation awards exercisable. Excludes stock and unit options.

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Weighted average remaining contractual term for vested portions of equity instruments other than options outstanding and currently exercisable or convertible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period.

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Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event.

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The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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Weighted average remaining contractual term for equity-based awards excluding options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Number of non-option equity instruments exercised by participants.

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Number of equity instruments other than options outstanding, including both vested and non-vested instruments.

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Amount by which the current fair value of the underlying stock exceeds the exercise price of fully vested and expected to vest options outstanding.

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As of the balance sheet date, the number of shares into which fully vested and expected to vest stock options outstanding can be converted under the option plan.

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As of the balance sheet date, the weighted-average exercise price for outstanding stock options that are fully vested or expected to vest.

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Intrinsic value of equity-based compensation awards outstanding. Excludes stock and unit options.

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Weighted average remaining contractual term for fully vested and expected to vest options outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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