Note 2 - Loans and Allowance for Credit Losses (Details Textual) - USD ($)	6 Months Ended
	Jun. 30, 2023	Dec. 31, 2022
Mortgage Loans in Process of Foreclosure, Amount	$ 0	$ 11,000
Potential Problem Loans	$ 4,700,000	$ 6,400,000
Minimum [Member] | Real Estate Portfolio Segment [Member]
Financing Receivable, Amortization Period (Year)	15 years
Financing Receivable, Maturity Period (Year)	5 years
Minimum [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Maturity Period (Year)	1 year
Maximum [Member] | Real Estate Portfolio Segment [Member]
Financing Receivable, Amortization Period (Year)	30 years
Financing Receivable, Maturity Period (Year)	15 years
Maximum [Member] | Consumer Portfolio Segment [Member]
Financing Receivable, Maturity Period (Year)	5 years