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Note 7 - Loans Receivable and Credit Disclosures - Composition of Loans Receivable (Details) - USD ($) $ in Thousands		Mar. 31, 2025	Dec. 31, 2024	Mar. 31, 2024	Dec. 31, 2023
Loans receivable		$ 1,324,017	$ 1,320,813
Unallocated portfolio layer basis adjustments1	[1]	217	162
Less allowance for credit losses		(18,004)	(17,058)	$ (16,952)	$ (16,776)
Loans receivable, net		1,306,230	1,303,917
Construction Real Estate [Member]
Loans receivable		61,738	59,281
Less allowance for credit losses		(503)	(482)	(453)	(408)
Family Residential Real Estate 1-4 [Member]
Loans receivable		310,829	309,704
Less allowance for credit losses		(3,850)	(3,890)	(3,309)	(3,333)
Multifamily [Member]
Loans receivable		199,609	200,209
Less allowance for credit losses		(2,152)	(2,188)	(2,537)	(2,542)
Commercial Real Estate Portfolio Segment [Member]
Loans receivable		352,259	350,493
Less allowance for credit losses		(4,940)	(4,932)	(5,494)	(5,236)
Agriculture Real Estate [Member]
Loans receivable		160,318	159,880
Less allowance for credit losses		(1,589)	(1,584)	(1,221)	(1,238)
Commercial Portfolio Segment [Member]
Loans receivable		93,374	90,023
Less allowance for credit losses		(2,886)	(1,759)	(1,913)	(1,955)
Agriculture [Member]
Loans receivable		129,361	134,157
Less allowance for credit losses		(1,674)	(1,805)	(1,588)	(1,607)
Consumer and Other [Member]
Loans receivable		16,529	17,066
Less allowance for credit losses		$ (410)	$ (418)	$ (437)	$ (457)
[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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