Note 8 - Income Taxes (Details Textual) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Income Tax Expense (Benefit)	$ 57	$ 1,510
Effective Income Tax Rate Reconciliation, Percent	6.00%	22.40%
Supplemental Executive Retirement Plan (SERP) [Member]
Effective Income Tax Rate Reconciliation, Tax Exempt Income, Amount		$ 200
Put Option [Member]
Effective Income Tax Rate Reconciliation, Tax Exempt Income, Amount		$ 400