Note 6 - Investments, Available for Sale ("AFS") - Schedule of Available-for-Sale Securities Reconciliation (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Amortized Cost, AFS	$ 577,791	$ 584,287
Gross unrealized gains, AFS	1,121	1,162
Gross unrealized losses, AFS	(46,443)	(47,809)
Available For Sale ("AFS")	532,469	537,640
Collateralized Loan Obligations [Member]
Amortized Cost, AFS	48,005	51,022
Gross unrealized gains, AFS	104	72
Gross unrealized losses, AFS	(406)	(728)
Available For Sale ("AFS")	47,703	50,366
Small Business Administration Bonds [Member]
Amortized Cost, AFS	73,124	79,014
Gross unrealized gains, AFS	385	416
Gross unrealized losses, AFS	(2,709)	(2,677)
Available For Sale ("AFS")	70,800	76,753
US States and Political Subdivisions Debt Securities [Member]
Amortized Cost, AFS	20,519	21,501
Gross unrealized gains, AFS	509	643
Gross unrealized losses, AFS	(993)	(908)
Available For Sale ("AFS")	20,035	21,236
Taxable Municipal Bonds [Member]
Amortized Cost, AFS	64,649	64,669
Gross unrealized gains, AFS	0	0
Gross unrealized losses, AFS	(11,897)	(11,554)
Available For Sale ("AFS")	52,752	53,115
Collateralized Mortgage-Backed Securities [Member]
Amortized Cost, AFS	371,494	368,081
Gross unrealized gains, AFS	123	31
Gross unrealized losses, AFS	(30,438)	(31,942)
Available For Sale ("AFS")	$ 341,179	$ 336,170