Note 23 - Restricted Stock Unit Activity (Details) - Restricted Stock Units (RSUs) [Member] - $ / shares	12 Months Ended
Dec. 31, 2019	Dec. 31, 2018
Restricted Stock Unit Activity [Line Items]
Number of Restricted Units, Outstanding	703,748
Number of Restricted Units, Granted	521,698
Number of Restricted Units, Vested	475,295
Number of Restricted Units, Forfeited	28,350
Number of Restricted Units, Outstanding	721,801	703,748
Weighted-Average Grant Date Fair Values, Outstanding	$ 4.72
Weighted-Average Grant Date Fair Values, Granted	2.93	$ 3.66
Weighted-Average Grant Date Fair Values, Vested	4.92
Weighted-Average Grant Date Fair Values, Forfeited	5.88
Weighted-Average Grant Date Fair Values, Outstanding	$ 3.25	$ 4.72

Restricted stock unit activity.

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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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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
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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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- Definition

The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

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Per share or unit weighted-average fair value of nonvested award under share-based payment arrangement. Excludes share and unit options.

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

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The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement.

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