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Note 9 - Stock Compensation Plans (Details Textual) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Mar. 01, 2022	Dec. 31, 2009
Share Price (in dollars per share)			$ 7.65
Share-Based Payment Arrangement, Expense	$ 1.3	$ 1.0
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant (in shares)	86,383
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Number, Ending Balance (in shares)	0
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized (in shares)				250,000
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value		$ 0.7
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Aggregate Intrinsic Value, Outstanding			$ 8.1
Share-Based Payment Arrangement, Nonvested Award, Excluding Option, Cost Not yet Recognized, Amount	$ 5.1
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant (in shares)	527,234
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized (in shares)	4,850,000