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Note 7 - Loans Receivable and Credit Disclosures - Composition of Loans Receivable (Details) - USD ($) $ in Thousands		Jun. 30, 2024	Mar. 31, 2024	Dec. 31, 2023	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2022
Loans receivable		$ 1,298,422		$ 1,294,178
Unallocated portfolio layer basis adjustments1	[1]	(5)		410
Less allowance for credit losses		(17,203)	$ (16,952)	(16,776)	$ (16,319)	$ (16,269)	$ (15,697)
Loans receivable, net		1,281,214		1,277,812
Construction Real Estate [Member]
Loans receivable		63,076		63,050
Less allowance for credit losses		(413)	(453)	(408)	(412)	(391)	(730)
Family Residential Real Estate 1-4 [Member]
Loans receivable		292,605		289,404
Less allowance for credit losses		(3,349)	(3,309)	(3,333)	(3,357)	(3,288)	(3,028)
Multifamily [Member]
Loans receivable		199,744		195,536
Less allowance for credit losses		(2,584)	(2,537)	(2,542)	(2,524)	(2,568)	(2,493)
Commercial Real Estate Portfolio Segment [Member]
Loans receivable		355,533		359,266
Less allowance for credit losses		(5,530)	(5,494)	(5,236)	(5,033)	(5,206)	(4,742)
Agriculture Real Estate [Member]
Loans receivable		160,460		161,517
Less allowance for credit losses		(1,226)	(1,221)	(1,238)	(1,214)	(1,218)	(1,625)
Commercial Portfolio Segment [Member]
Loans receivable		87,546		89,729
Less allowance for credit losses		(1,912)	(1,913)	(1,955)	(2,014)	(1,784)	(1,153)
Agriculture [Member]
Loans receivable		122,642		119,136
Less allowance for credit losses		(1,710)	(1,588)	(1,607)	(1,358)	(1,392)	(1,705)
Consumer and Other [Member]
Loans receivable		16,816		16,540
Less allowance for credit losses		$ (479)	$ (437)	$ (457)	$ (407)	$ (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 11 (“Derivative Financial Instruments”) for additional information.

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