Note 9 - Share-based Payments - Restricted Share and RSU Awards (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
Dec. 31, 2019	Dec. 31, 2018
Restricted Stock [Member]
Non-vested (in shares)	7,210
Non-vested, weighted average grant date fair value (in dollars per share)	$ 14.18
Non-vested, aggregate intrinsic value	$ 75	$ 102
Granted (in shares)	10,858
Granted, weighted average grant date fair value (in dollars per share)	$ 6.91
Granted, aggregate intrinsic value	$ 75
Vested (in shares)	7,210
Vested, weighted average grant date fair value (in dollars per share)	$ 14.18
Vested, aggregate intrinsic value	$ 102
Forfeitures (in shares)
Forfeitures, weighted average grant date fair value (in dollars per share)
Non-vested (in shares)	10,858
Non-vested, weighted average grant date fair value (in dollars per share)	$ 6.91
Restricted Stock Units (RSUs) [Member]
Non-vested (in shares)	332,364
Non-vested, weighted average grant date fair value (in dollars per share)	$ 14.34
Non-vested, aggregate intrinsic value	$ 4,118	$ 4,765
Granted (in shares)	219,959
Granted, weighted average grant date fair value (in dollars per share)	$ 6.91
Granted, aggregate intrinsic value	$ 1,520
Vested (in shares)	97,335
Vested, weighted average grant date fair value (in dollars per share)	$ 14.42
Vested, aggregate intrinsic value	$ 1,404
Forfeitures (in shares)	71,558
Forfeitures, weighted average grant date fair value (in dollars per share)	$ 10.67
Forfeited, aggregate intrinsic value	$ 763
Non-vested (in shares)	383,430
Non-vested, weighted average grant date fair value (in dollars per share)	$ 10.74

Intrinsic value of forfeited award under share-based payment arrangement. Excludes share and unit options.

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Intrinsic value of granted 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 were forfeited during the reporting period.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
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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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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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Intrinsic value of nonvested award under share-based payment arrangement. Excludes share and unit options.

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Intrinsic value of vested award under share-based payment arrangement. Excludes share and unit options.

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