Note 1 - Summary of Significant Accounting Policies - Share-based Compensation Amounts Recognized in Financial Statements (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Non-cash share-based compensation expense	$ 623	$ 680	$ 1,224
Amount of related income tax benefit	(919)	(6,764)	(2,081)
Net (benefit) expense to net income	$ (296)	$ (6,084)	$ (857)

Amount of tax benefit for recognition of expense of award under share-based payment arrangement.

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 (h)(1)(i)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

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