Note 2 - Loans and Allowance for Credit Losses (Details Textual) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023 USD ($)	Sep. 30, 2022	Sep. 30, 2023 USD ($)	Sep. 30, 2022	Dec. 31, 2022 USD ($)
Financing Receivable, Accrued Interest, before Allowance for Credit Loss	$ 2,760		$ 2,760		$ 2,516
Financing Receivable, Modifications, Number of Contracts	0	0	1	0
Financing Receivable, Troubled Debt Restructuring, Subsequent Default, Number of Contracts			0