Note 4 - Loans - Schedule of Non-accrual Loans (Details) - USD ($) $ in Thousands	Mar. 31, 2025	Dec. 31, 2024
Financing Receivable, Nonaccrual, No Allowance	$ 114	$ 117
Financing Receivable, Nonaccrual	4,710	4,528
Commercial and Industrial Portfolio Segment [Member]
Financing Receivable, Nonaccrual, No Allowance	0	0
Financing Receivable, Nonaccrual	1,379	1,375
Commercial Real Estate Portfolio Segment [Member] | Owner Occupied [Member]
Financing Receivable, Nonaccrual, No Allowance	0	0
Financing Receivable, Nonaccrual	0	0
Commercial Real Estate Portfolio Segment [Member] | Non-owner Occupied [Member]
Financing Receivable, Nonaccrual, No Allowance	0	0
Financing Receivable, Nonaccrual	2,687	2,642
Commercial Real Estate Portfolio Segment [Member] | Farmland [Member]
Financing Receivable, Nonaccrual, No Allowance	16	16
Financing Receivable, Nonaccrual	16	16
Commercial Real Estate Portfolio Segment [Member] | Multifamily Loans [Member]
Financing Receivable, Nonaccrual, No Allowance	0	0
Financing Receivable, Nonaccrual	0	0
Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member]
Financing Receivable, Nonaccrual, No Allowance	0	0
Financing Receivable, Nonaccrual	0	0
Residential Portfolio Segment [Member] | Secured By Junior Liens on 1-4 Family Dwellings [Member]
Financing Receivable, Nonaccrual, No Allowance	71	73
Financing Receivable, Nonaccrual	601	467
Residential Portfolio Segment [Member] | Secured By Senior Liens On 1-4 Family Dwellings [Member]
Financing Receivable, Nonaccrual, No Allowance	0	0
Financing Receivable, Nonaccrual	0	0
Residential Portfolio Segment [Member] | Home Equity Line-of-credit loans [Member]
Financing Receivable, Nonaccrual, No Allowance	0	0
Financing Receivable, Nonaccrual	0	0
Consumer Portfolio Segment [Member]
Financing Receivable, Nonaccrual, No Allowance	27	28
Financing Receivable, Nonaccrual	27	28
Agricultural Portfolio [Member]
Financing Receivable, Nonaccrual, No Allowance	0	0
Financing Receivable, Nonaccrual	$ 0	$ 0