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Note 4 - Credit Quality - Loans Modified as Troubled Debt Restructurings (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2025	Dec. 31, 2024
Financial Asset, Not Past Due [Member]
Loans modified	$ 1,913	$ 1,921
Financial Asset, 30 to 89 Days Past Due [Member]
Loans modified	213	204
Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans modified	165	135
Non-farm, Non-residential [Member] | Financial Asset, Not Past Due [Member]
Loans modified	589	625
Non-farm, Non-residential [Member] | Financial Asset, 30 to 89 Days Past Due [Member]
Loans modified	0	0
Non-farm, Non-residential [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans modified	0	0
Commercial and Industrial [Member] | Financial Asset, Not Past Due [Member]
Loans modified	48	144
Commercial and Industrial [Member] | Financial Asset, 30 to 89 Days Past Due [Member]
Loans modified	0	0
Commercial and Industrial [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans modified	0	135
Single Family Owner Occupied [Member] | Financial Asset, Not Past Due [Member]
Loans modified	1,248	1,140
Single Family Owner Occupied [Member] | Financial Asset, 30 to 89 Days Past Due [Member]
Loans modified	213	174
Single Family Owner Occupied [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans modified	165	0
Consumer Loans [Member] | Financial Asset, Not Past Due [Member]
Loans modified	6	10
Consumer Loans [Member] | Financial Asset, 30 to 89 Days Past Due [Member]
Loans modified	0	0
Consumer Loans [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans modified	0	0
Single Family Non-owner Occupied [Member] | Financial Asset, Not Past Due [Member]
Loans modified	22	0
Single Family Non-owner Occupied [Member] | Financial Asset, 30 to 89 Days Past Due [Member]
Loans modified	0	30
Single Family Non-owner Occupied [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans modified	0	0
Home Equity Lines [Member] | Financial Asset, Not Past Due [Member]
Loans modified	0	2
Home Equity Lines [Member] | Financial Asset, 30 to 89 Days Past Due [Member]
Loans modified	0
Home Equity Lines [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans modified	0
Agricultural [Member] | Financial Asset, Not Past Due [Member]
Loans modified	0
Agricultural [Member] | Financial Asset, 30 to 89 Days Past Due [Member]
Loans modified	0
Agricultural [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Loans modified	0
Payment Deferral [Member]
Amortized cost basis	1,103	1,299
Payment Deferral [Member] | Non-farm, Non-residential [Member]
Amortized cost basis	$ 589	$ 625
Percentage of total financing receivable	0.07%	0.07%
Delayed period (Month)	6 months	6 months
Payment Deferral [Member] | Commercial and Industrial [Member]
Amortized cost basis	$ 13	$ 135
Percentage of total financing receivable	0.10%	0.06%
Delayed period (Month)	6 years
Deferred principal		$ 8
Payment Deferral [Member] | Single Family Owner Occupied [Member]
Amortized cost basis	$ 479	$ 509
Percentage of total financing receivable	0.08%	0.08%
Deferred principal	$ 66	$ 66
Payment Deferral [Member] | Single Family Non-owner Occupied [Member]
Amortized cost basis	$ 22	$ 30
Percentage of total financing receivable	0.01%	0.02%
Delayed period (Month)	6 months	6 months
Extended Maturity [Member]
Amortized cost basis	$ 105	$ 148
Extended Maturity [Member] | Commercial and Industrial [Member]
Amortized cost basis	$ 35	$ 144
Percentage of total financing receivable	0.01%	0.06%
Delayed period (Month)		2 years
Extended Maturity [Member] | Commercial and Industrial [Member] | Minimum [Member]
Delayed period (Month)	24 years
Extended Maturity [Member] | Commercial and Industrial [Member] | Maximum [Member]
Delayed period (Month)	46 years
Extended Maturity [Member] | Single Family Owner Occupied [Member]
Amortized cost basis	$ 69
Percentage of total financing receivable	0.01%
Extended term (Year)	10 years 6 months
Extended Maturity [Member] | Consumer Loans [Member]
Amortized cost basis	$ 1	$ 2
Percentage of total financing receivable	0.00%	0.00%
Extended Maturity [Member] | Consumer Loans [Member] | Minimum [Member]
Extended term (Year)	60 months	60 months
Extended Maturity [Member] | Consumer Loans [Member] | Maximum [Member]
Extended term (Year)	84 months	84 months
Extended Maturity [Member] | Home Equity Lines [Member]
Amortized cost basis		$ 2
Percentage of total financing receivable		0.00%
Delayed period (Month)		2 years
Term Extension and Rate Reduction [Member]
Amortized cost basis	$ 993	$ 813
Term Extension and Rate Reduction [Member] | Single Family Owner Occupied 1 [Member]
Amortized cost basis	$ 988	$ 806
Percentage of total financing receivable	0.16%	0.12%
Extended term (Year)	10 months	10 months
Term Extension and Rate Reduction [Member] | Consumer Loans [Member]
Amortized cost basis	$ 5	$ 7
Percentage of total financing receivable	0.01%	0.01%
Interest rate after modification	10.50%	10.50%
Contractual Interest Rate Reduction [Member]
Amortized cost basis	$ 90
Contractual Interest Rate Reduction [Member] | Single Family Owner Occupied 1 [Member]
Amortized cost basis	$ 90
Percentage of total financing receivable	0.01%
Extended term (Year)	3 years 1 month 24 days
Interest rate after modification	1.95%

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+ References

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+ References

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+ References

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