Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
HTM, allowance for credit losses	$ 0	$ 0
HTM, fair value	154,938	158,540
Held for investment, allowance for credit loss	$ 12,842	$ 12,569
Preferred Stock, par value (in dollars per share)	$ 1,000	$ 1,000
Preferred Stock, Shares Authorized (in shares)	82,949	82,949
Preferred Stock, Shares Issued (in shares)	82,949	82,949
Preferred Stock, Shares Outstanding (in shares)	82,949	82,949
Common Stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common Stock, Shares, authorized (in shares)	5,000,000	5,000,000
Common Stock, Shares, issued (in shares)	3,456,714	3,456,136
Common Stock, Shares, outstanding (in shares)	3,225,125	3,228,777
Treasury stock, shares (in shares)	231,589	227,359