Note 4 - Loans - Schedule of Non-accrual Loans (Details) - USD ($)	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Financing Receivable, Nonaccrual, No Allowance	$ 117,000	$ 80,000
Financing Receivable, Nonaccrual	4,528,000	80,000	$ 391,000
Commercial and Industrial Portfolio Segment [Member]
Financing Receivable, Nonaccrual, No Allowance	0	0
Financing Receivable, Nonaccrual	1,375,000	0
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	2,642,000	0
Commercial Real Estate Portfolio Segment [Member] | Farmland [Member]
Financing Receivable, Nonaccrual, No Allowance	16,000	51,000
Financing Receivable, Nonaccrual	16,000	51,000
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	73,000	29,000
Financing Receivable, Nonaccrual	467,000	29,000
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	28,000	0
Financing Receivable, Nonaccrual	28,000	0
Agricultural Portfolio [Member]
Financing Receivable, Nonaccrual, No Allowance	0	0
Financing Receivable, Nonaccrual	$ 0	$ 0