Note 4 - Loans and the Allowance for Credit Losses - Reversal of Accrued Interest (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2024 USD ($)
Interest income reversed	$ 39
Commercial Portfolio Segment [Member] | Commercial Loans [Member]
Interest income reversed	4
Commercial Portfolio Segment [Member] | Real Estate Loan [Member]
Interest income reversed	14
Residential Portfolio Segment [Member] | Real Estate Loan [Member]
Interest income reversed	9
Residential Portfolio Segment [Member] | Equity Lines of Credit [Member]
Interest income reversed	10
Consumer Portfolio Segment [Member] | Automobile Loan [Member]
Interest income reversed	$ 2