Note 6 - Allowance for Credit Losses and Credit Quality Information (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Financing Receivable, Nonaccrual	$ 3,818	$ 1,878
Financing Receivable, Nonaccrual, Allowance for Credit Loss	400	200
Loan Receivable for Which Value of Collateral Sufficient to Repay	1,300	1,000
Financing Receivable, Nonaccrual, Gross Interest Income If Performed With Original Terms	500	$ 100
Financing Receivable, Nonaccrual, Interest Income	100
Financing Receivable, Modified, Accumulated	$ 364