Note 16 - Stock-Based Compensation - Stock-based Compensation Expense (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Allocated Share-based Compensation Expense	$ 2,352	$ 2,150	$ 2,469
Employee Stock Option
Allocated Share-based Compensation Expense	270	297	475
Restricted Stock
Allocated Share-based Compensation Expense	1,864	1,619	1,850
Employee Stock Purchase Plan
Allocated Share-based Compensation Expense	$ 218	$ 234	$ 144

Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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