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Note 7 - Loans Receivable and Credit Disclosures - Amortized Cost Basis of Collateral Dependent Loans (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Mar. 31, 2024	Dec. 31, 2023	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2022
Allowance for credit loss	$ 17,203	$ 16,952	$ 16,776	$ 16,319	$ 16,269	$ 15,697
Construction Real Estate [Member]
Allowance for credit loss	413	453	408	412	391	730
Family Residential Real Estate 1-4 [Member]
Allowance for credit loss	3,349	3,309	3,333	3,357	3,288	3,028
Multifamily [Member]
Allowance for credit loss	2,584	2,537	2,542	2,524	2,568	2,493
Commercial Real Estate Portfolio Segment [Member]
Allowance for credit loss	5,530	5,494	5,236	5,033	5,206	4,742
Agriculture Real Estate [Member]
Allowance for credit loss	1,226	1,221	1,238	1,214	1,218	1,625
Commercial Portfolio Segment [Member]
Allowance for credit loss	1,912	1,913	1,955	2,014	1,784	1,153
Agriculture [Member]
Allowance for credit loss	1,710	1,588	1,607	1,358	1,392	1,705
Consumer and Other [Member]
Allowance for credit loss	479	$ 437	457	$ 407	$ 422	$ 221
Real Estate [Member]
Financing Receivable Individually Evaluated For Impairment	12,030		12,577
Real Estate [Member] | Construction Real Estate [Member]
Financing Receivable Individually Evaluated For Impairment	62		66
Real Estate [Member] | Family Residential Real Estate 1-4 [Member]
Financing Receivable Individually Evaluated For Impairment	667		678
Real Estate [Member] | Multifamily [Member]
Financing Receivable Individually Evaluated For Impairment	2,020		2,034
Real Estate [Member] | Commercial Real Estate Portfolio Segment [Member]
Financing Receivable Individually Evaluated For Impairment	8,508		8,993
Real Estate [Member] | Agriculture Real Estate [Member]
Financing Receivable Individually Evaluated For Impairment	437		449
Real Estate [Member] | Commercial Portfolio Segment [Member]
Financing Receivable Individually Evaluated For Impairment	111		118
Real Estate [Member] | Agriculture [Member]
Financing Receivable Individually Evaluated For Impairment	225		239
Real Estate [Member] | Consumer and Other [Member]
Financing Receivable Individually Evaluated For Impairment	0		0
Equipment [Member]
Financing Receivable Individually Evaluated For Impairment	11		669
Equipment [Member] | Construction Real Estate [Member]
Financing Receivable Individually Evaluated For Impairment	0		0
Equipment [Member] | Family Residential Real Estate 1-4 [Member]
Financing Receivable Individually Evaluated For Impairment	0		0
Equipment [Member] | Multifamily [Member]
Financing Receivable Individually Evaluated For Impairment	0		0
Equipment [Member] | Commercial Real Estate Portfolio Segment [Member]
Financing Receivable Individually Evaluated For Impairment	0		0
Equipment [Member] | Agriculture Real Estate [Member]
Financing Receivable Individually Evaluated For Impairment	0		0
Equipment [Member] | Commercial Portfolio Segment [Member]
Financing Receivable Individually Evaluated For Impairment	2		0
Equipment [Member] | Agriculture [Member]
Financing Receivable Individually Evaluated For Impairment	9		669
Equipment [Member] | Consumer and Other [Member]
Financing Receivable Individually Evaluated For Impairment	0		0
Other [Member]
Financing Receivable Individually Evaluated For Impairment	495		503
Other [Member] | Construction Real Estate [Member]
Financing Receivable Individually Evaluated For Impairment	0		0
Other [Member] | Family Residential Real Estate 1-4 [Member]
Financing Receivable Individually Evaluated For Impairment	0		0
Other [Member] | Multifamily [Member]
Financing Receivable Individually Evaluated For Impairment	0		0
Other [Member] | Commercial Real Estate Portfolio Segment [Member]
Financing Receivable Individually Evaluated For Impairment	0		0
Other [Member] | Agriculture Real Estate [Member]
Financing Receivable Individually Evaluated For Impairment	0		0
Other [Member] | Commercial Portfolio Segment [Member]
Financing Receivable Individually Evaluated For Impairment	94		101
Other [Member] | Agriculture [Member]
Financing Receivable Individually Evaluated For Impairment	396		402
Other [Member] | Consumer and Other [Member]
Financing Receivable Individually Evaluated For Impairment	5		0
Collateral Pledged [Member]
Financing Receivable Individually Evaluated For Impairment	12,536		13,749
Allowance for credit loss	130		106
Collateral Pledged [Member] | Construction Real Estate [Member]
Financing Receivable Individually Evaluated For Impairment	62		66
Allowance for credit loss	0		0
Collateral Pledged [Member] | Family Residential Real Estate 1-4 [Member]
Financing Receivable Individually Evaluated For Impairment	667		678
Allowance for credit loss	0		10
Collateral Pledged [Member] | Multifamily [Member]
Financing Receivable Individually Evaluated For Impairment	2,020		2,034
Allowance for credit loss	0		0
Collateral Pledged [Member] | Commercial Real Estate Portfolio Segment [Member]
Financing Receivable Individually Evaluated For Impairment	8,508		8,993
Allowance for credit loss	0		0
Collateral Pledged [Member] | Agriculture Real Estate [Member]
Financing Receivable Individually Evaluated For Impairment	437		449
Allowance for credit loss	0		0
Collateral Pledged [Member] | Commercial Portfolio Segment [Member]
Financing Receivable Individually Evaluated For Impairment	207		219
Allowance for credit loss	94		96
Collateral Pledged [Member] | Agriculture [Member]
Financing Receivable Individually Evaluated For Impairment	630		1,310
Allowance for credit loss	36		0
Collateral Pledged [Member] | Consumer and Other [Member]
Financing Receivable Individually Evaluated For Impairment	5		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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