Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Statement of Financial Position [Abstract]
Available-for-sale, amortized cost	$ 542,491	$ 576,178
Equity securities, cost	$ 6,032	$ 5,695
Common stock, par value (in dollars per share)	$ 0.625	$ 0.625
Common stock, shares authorized (in shares)	10,000,000	10,000,000
Common stock, shares issued (in shares)	3,886,653	3,861,940
Common stock, shares outstanding (in shares)	3,677,967	3,653,254
Treasury stock, shares (in shares)	208,686	208,686