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Note 11 - Share-based Compensation - Stock-settled Stock Appreciation Rights Transactions (Details) - Stock Appreciation Rights (SARs) [Member] - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Jan. 01, 2021
Outstanding SARS (in shares)	317,128
Outstanding (in dollars per share)	$ 13.47
Outstanding SARS, weighted average remaining life (Year)	2 years 7 months 24 days	3 years 4 months 9 days
Outstanding SARS, aggregate intrinsic value	$ 2,205		$ 2,031
Granted SARs (in shares)	31,687
Granted SARS, weighted average exercise price (in dollars per share)	$ 25.75
Exercised SARs (in shares)	(57,756)
Exercised SARS, weighted average exercise price (in dollars per share)	$ 12.54
Outstanding SARS (in shares)	291,059	317,128
Outstanding SARS, weighted average exercise price (in dollars per share)	$ 14.99	$ 13.47
Exercisable (in shares)	129,268
Exercisable, weighted average exercise price (in dollars per share)	$ 16.40
Exercisable, weighted average remaining life (Year)	1 year 9 months 29 days
Exercisable, aggregate intrinsic value	$ 777

X

- Definition

The weighted average exercise price for non-option equity instruments.

+ References

No definition available.

+ Details

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- Definition

The weighted average grant-date fair value of SARS exercised during the reporting period as calculated by applying the disclosed option pricing methodology.

+ References

No definition available.

+ Details

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- Definition

The weighted average exercise price of non-option equity instruments granted during the period.

+ References

No definition available.

+ Details

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- Definition

Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of vested portions of non-option equity awards outstanding and currently exercisable.

+ References

No definition available.

+ Details

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X

- Definition

Number of non-option equity instruments exercisable.

+ References

No definition available.

+ Details

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X

- Definition

Weighted average price at which the shares can be exercisable.

+ References

No definition available.

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- Definition

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

+ References

No definition available.

+ Details

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X

- Definition

Amount by which the current fair value of the underlying stock exceeds the exercise price of non-option equity awards outstanding.

+ References

No definition available.

+ Details

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- Definition

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

+ References

No definition available.

+ Details

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- Definition

Number of non-option equity instruments exercised by participants.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(iv)(2)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

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- Definition

Net number of non-option equity instruments granted to participants.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(iv)(1)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

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- Definition

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

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(ii)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

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-Name Accounting Standards Codification
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-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(i)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

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