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Note 7 - Loans Receivable and Credit Disclosures - Amortized Cost Basis of Collateral Dependent Loans (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023	Mar. 31, 2023	Dec. 31, 2022
Allowance for credit loss	$ 16,952	$ 16,776	$ 16,269	$ 15,697
Real Estate [Member]
Financing Receivable Individually Evaluated For Impairment	12,237	12,577
Equipment [Member]
Financing Receivable Individually Evaluated For Impairment	391	669
Other [Member]
Financing Receivable Individually Evaluated For Impairment	504	503
Collateral Pledged [Member]
Financing Receivable Individually Evaluated For Impairment	13,132	13,749
Allowance for credit loss	96	106
Construction Real Estate [Member]
Allowance for credit loss	453	408	391	730
Construction Real Estate [Member] | Real Estate [Member]
Financing Receivable Individually Evaluated For Impairment	62	66
Construction Real Estate [Member] | Equipment [Member]
Financing Receivable Individually Evaluated For Impairment	0	0
Construction Real Estate [Member] | Other [Member]
Financing Receivable Individually Evaluated For Impairment	0	0
Construction Real Estate [Member] | Collateral Pledged [Member]
Financing Receivable Individually Evaluated For Impairment	62	66
Allowance for credit loss	0	0
Family Residential Real Estate 1-4 [Member]
Allowance for credit loss	3,309	3,333	3,288	3,028
Family Residential Real Estate 1-4 [Member] | Real Estate [Member]
Financing Receivable Individually Evaluated For Impairment	666	678
Family Residential Real Estate 1-4 [Member] | Equipment [Member]
Financing Receivable Individually Evaluated For Impairment	0	0
Family Residential Real Estate 1-4 [Member] | Other [Member]
Financing Receivable Individually Evaluated For Impairment	0	0
Family Residential Real Estate 1-4 [Member] | Collateral Pledged [Member]
Financing Receivable Individually Evaluated For Impairment	666	678
Allowance for credit loss	3	10
Multifamily [Member]
Allowance for credit loss	2,537	2,542	2,568	2,493
Multifamily [Member] | Real Estate [Member]
Financing Receivable Individually Evaluated For Impairment	2,020	2,034
Multifamily [Member] | Equipment [Member]
Financing Receivable Individually Evaluated For Impairment	0	0
Multifamily [Member] | Other [Member]
Financing Receivable Individually Evaluated For Impairment	0	0
Multifamily [Member] | Collateral Pledged [Member]
Financing Receivable Individually Evaluated For Impairment	2,020	2,034
Allowance for credit loss	0	0
Commercial Real Estate Portfolio Segment [Member]
Allowance for credit loss	5,494	5,236	5,206	4,742
Commercial Real Estate Portfolio Segment [Member] | Real Estate [Member]
Financing Receivable Individually Evaluated For Impairment	8,698	8,993
Commercial Real Estate Portfolio Segment [Member] | Equipment [Member]
Financing Receivable Individually Evaluated For Impairment	0	0
Commercial Real Estate Portfolio Segment [Member] | Other [Member]
Financing Receivable Individually Evaluated For Impairment	0	0
Commercial Real Estate Portfolio Segment [Member] | Collateral Pledged [Member]
Financing Receivable Individually Evaluated For Impairment	8,698	8,993
Allowance for credit loss	0	0
Agriculture Real Estate [Member]
Allowance for credit loss	1,221	1,238	1,218	1,625
Agriculture Real Estate [Member] | Real Estate [Member]
Financing Receivable Individually Evaluated For Impairment	444	449
Agriculture Real Estate [Member] | Equipment [Member]
Financing Receivable Individually Evaluated For Impairment	0	0
Agriculture Real Estate [Member] | Other [Member]
Financing Receivable Individually Evaluated For Impairment	0	0
Agriculture Real Estate [Member] | Collateral Pledged [Member]
Financing Receivable Individually Evaluated For Impairment	444	449
Allowance for credit loss	0	0
Commercial Portfolio Segment [Member]
Allowance for credit loss	1,913	1,955	1,784	1,153
Commercial Portfolio Segment [Member] | Real Estate [Member]
Financing Receivable Individually Evaluated For Impairment	114	118
Commercial Portfolio Segment [Member] | Equipment [Member]
Financing Receivable Individually Evaluated For Impairment	2	0
Commercial Portfolio Segment [Member] | Other [Member]
Financing Receivable Individually Evaluated For Impairment	95	101
Commercial Portfolio Segment [Member] | Collateral Pledged [Member]
Financing Receivable Individually Evaluated For Impairment	211	219
Allowance for credit loss	93	96
Agriculture [Member]
Allowance for credit loss	1,588	1,607	1,392	1,705
Agriculture [Member] | Real Estate [Member]
Financing Receivable Individually Evaluated For Impairment	233	239
Agriculture [Member] | Equipment [Member]
Financing Receivable Individually Evaluated For Impairment	389	669
Agriculture [Member] | Other [Member]
Financing Receivable Individually Evaluated For Impairment	402	402
Agriculture [Member] | Collateral Pledged [Member]
Financing Receivable Individually Evaluated For Impairment	1,024	1,310
Allowance for credit loss	0	0
Consumer and Other [Member]
Allowance for credit loss	437	457	$ 422	$ 221
Consumer and Other [Member] | Real Estate [Member]
Financing Receivable Individually Evaluated For Impairment	0	0
Consumer and Other [Member] | Equipment [Member]
Financing Receivable Individually Evaluated For Impairment	0	0
Consumer and Other [Member] | Other [Member]
Financing Receivable Individually Evaluated For Impairment	7	0
Consumer and Other [Member] | Collateral Pledged [Member]
Financing Receivable Individually Evaluated For Impairment	7	0
Allowance for credit loss	$ 0	$ 0

X

- Definition

Amount of allowance for credit loss on financing receivable. Excludes allowance for financing receivable covered under loss sharing agreement.

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