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Note 7 - Loans Receivable and Credit Disclosures - Composition of Loans Receivable (Details) - USD ($) $ in Thousands		Mar. 31, 2024	Dec. 31, 2023	Mar. 31, 2023	Dec. 31, 2022
Loans receivable		$ 1,289,470	$ 1,294,178
Unallocated portfolio layer basis adjustments1	[1]	(62)	(410)
Less allowance for credit losses		(16,952)	(16,776)	$ (16,269)	$ (15,697)
Total loans receivable, net		1,272,580	1,277,812
Construction Real Estate [Member]
Loans receivable		70,095	63,050
Less allowance for credit losses		(453)	(408)	(391)	(730)
Family Residential Real Estate 1-4 [Member]
Loans receivable		288,988	289,404
Less allowance for credit losses		(3,309)	(3,333)	(3,288)	(3,028)
Multifamily [Member]
Loans receivable		196,010	195,536
Less allowance for credit losses		(2,537)	(2,542)	(2,568)	(2,493)
Commercial Real Estate Portfolio Segment [Member]
Loans receivable		353,061	359,266
Less allowance for credit losses		(5,494)	(5,236)	(5,206)	(4,742)
Agriculture Real Estate [Member]
Loans receivable		160,457	161,517
Less allowance for credit losses		(1,221)	(1,238)	(1,218)	(1,625)
Commercial Portfolio Segment [Member]
Loans receivable		87,751	89,729
Less allowance for credit losses		(1,913)	(1,955)	(1,784)	(1,153)
Agriculture [Member]
Loans receivable		117,254	119,136
Less allowance for credit losses		(1,588)	(1,607)	(1,392)	(1,705)
Consumer and Other [Member]
Loans receivable		15,854	16,540
Less allowance for credit losses		$ (437)	$ (457)	$ (422)	$ (221)
[1] This amount represents portfolio layer method basis adjustments related to loans hedged in a closed portfolio. Under the portfolio layer method basis adjustments are not allocated to individual loans, however, the amounts impact the net loan balance. These basis adjustments would be allocated to the amortized cost of specific loans within the pool if the hedge was de-designated. See Note 10 (“Derivative Financial Instruments”) for additional information.

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