Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) - USD ($) $ / shares in Thousands, $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Held-to-maturity securities, fair value	$ 194,251	$ 187,280
Financing receivable, allowance for credit losses	17,910	17,149
Loan, Held-for-Sale, Fair Value Disclosure	$ 160	$ 1,660
Preferred stock, par value (in dollars per share)	$ 0	$ 0
Preferred stock, shares authorized (in shares)	5,000,000	5,000,000
Preferred stock, shares issued (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0	$ 0
Common stock, shares authorized (in shares)	10,000,000	10,000,000
Common stock, shares issued (in shares)	5,665,255	5,630,794
Common stock, shares outstanding (in shares)	5,665,255	5,630,794
Treasury stock, shares (in shares)	25,945	32,663