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Note 4 - Loans Receivable and Credit Disclosures - Amortized Cost Basis of Term Loans by Year of Origination (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Financing Receivable, Year One	$ 216,734	$ 257,666
Financing Receivable, Year Two	181,589	290,241
Financing Receivable, Year Three	255,643	265,145
Financing Receivable, Year Four	233,220	213,817
Financing Receivable, Year Five	178,369	54,588
Financing Receivable, Prior	89,183	62,535
Financing Receivable, Revolving	166,075	150,186
Financing Receivable, Total	1,320,813	1,294,178
Current-period gross writeoffs, year one	474	39
Current-period gross writeoffs, year two	0	74
Current-period gross writeoffs, year three	0	90
Current-period gross writeoffs, year four	0	33
Current-period gross writeoffs, year five	0
Current-period gross writeoffs, prior	9	9
Current-period gross writeoffs, revolving	0
gross writeoffs	483	245
Commercial Portfolio Segment [Member]
Financing Receivable, Year One	17,387	25,458
Financing Receivable, Year Two	17,560	13,196
Financing Receivable, Year Three	10,916	10,502
Financing Receivable, Year Four	7,406	3,027
Financing Receivable, Year Five	1,719	2,527
Financing Receivable, Prior	3,499	1,787
Financing Receivable, Revolving	31,536	33,232
Financing Receivable, Total	90,023	89,729
Current-period gross writeoffs, year one	465
Current-period gross writeoffs, year two	0
Current-period gross writeoffs, year three	0
Current-period gross writeoffs, year four	0	33
Current-period gross writeoffs, year five	0
Current-period gross writeoffs, prior	9	4
Current-period gross writeoffs, revolving	0
gross writeoffs	474	37
Construction Real Estate [Member]
Financing Receivable, Year One	38,561	45,484
Financing Receivable, Year Two	16,689	14,567
Financing Receivable, Year Three	1,640	746
Financing Receivable, Year Four	228	11
Financing Receivable, Year Five	11
Financing Receivable, Prior	161	325
Financing Receivable, Revolving	1,991	1,917
Financing Receivable, Total	59,281	63,050
Current-period gross writeoffs, year one	0
Current-period gross writeoffs, year two	0
Current-period gross writeoffs, year three	0
Current-period gross writeoffs, year four	0
Current-period gross writeoffs, year five	0
Current-period gross writeoffs, prior	0
Current-period gross writeoffs, revolving	0
gross writeoffs	(0)	(0)
Agriculture [Member]
Financing Receivable, Year One	17,444	16,682
Financing Receivable, Year Two	6,164	8,889
Financing Receivable, Year Three	5,413	6,155
Financing Receivable, Year Four	4,046	2,934
Financing Receivable, Year Five	1,817	418
Financing Receivable, Prior	689	802
Financing Receivable, Revolving	98,584	83,256
Financing Receivable, Total	134,157	119,136
Current-period gross writeoffs, year one	0	39
Current-period gross writeoffs, year two	0	74
Current-period gross writeoffs, year three	0	90
Current-period gross writeoffs, year four	0
Current-period gross writeoffs, year five	0
Current-period gross writeoffs, prior	0
Current-period gross writeoffs, revolving	0
gross writeoffs	(0)	203
Family Residential Real Estate 1-4 [Member]
Financing Receivable, Year One	48,651	57,222
Financing Receivable, Year Two	46,372	66,506
Financing Receivable, Year Three	67,594	71,223
Financing Receivable, Year Four	63,581	49,138
Financing Receivable, Year Five	42,866	8,839
Financing Receivable, Prior	19,220	17,720
Financing Receivable, Revolving	21,420	18,756
Financing Receivable, Total	309,704	289,404
Current-period gross writeoffs, year one	0
Current-period gross writeoffs, year two	0
Current-period gross writeoffs, year three	0
Current-period gross writeoffs, year four	0
Current-period gross writeoffs, year five	0
Current-period gross writeoffs, prior	0
Current-period gross writeoffs, revolving	0
gross writeoffs	(0)	(0)
Consumer and Other [Member]
Financing Receivable, Year One	5,861	6,938
Financing Receivable, Year Two	4,451	3,719
Financing Receivable, Year Three	2,438	2,701
Financing Receivable, Year Four	1,931	2,084
Financing Receivable, Year Five	1,616	352
Financing Receivable, Prior	758	731
Financing Receivable, Revolving	11	15
Financing Receivable, Total	17,066	16,540
Current-period gross writeoffs, year one	9
Current-period gross writeoffs, year two	0
Current-period gross writeoffs, year three	0
Current-period gross writeoffs, year four	0
Current-period gross writeoffs, year five	0
Current-period gross writeoffs, prior	0	5
Current-period gross writeoffs, revolving	0
gross writeoffs	9	5
Multifamily [Member]
Financing Receivable, Year One	22,781	24,022
Financing Receivable, Year Two	20,441	53,355
Financing Receivable, Year Three	49,932	55,353
Financing Receivable, Year Four	51,793	42,499
Financing Receivable, Year Five	38,756	14,593
Financing Receivable, Prior	10,771	694
Financing Receivable, Revolving	5,735	5,020
Financing Receivable, Total	200,209	195,536
Current-period gross writeoffs, year one	0
Current-period gross writeoffs, year two	0
Current-period gross writeoffs, year three	0
Current-period gross writeoffs, year four	0
Current-period gross writeoffs, year five	0
Current-period gross writeoffs, prior	0
Current-period gross writeoffs, revolving	0
gross writeoffs	(0)	(0)
Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Year One	43,104	52,926
Financing Receivable, Year Two	46,047	97,453
Financing Receivable, Year Three	89,263	83,041
Financing Receivable, Year Four	72,626	84,631
Financing Receivable, Year Five	66,975	21,487
Financing Receivable, Prior	28,242	13,811
Financing Receivable, Revolving	4,236	5,917
Financing Receivable, Total	350,493	359,266
Current-period gross writeoffs, year one	0
Current-period gross writeoffs, year two	0
Current-period gross writeoffs, year three	0
Current-period gross writeoffs, year four	0
Current-period gross writeoffs, year five	0
Current-period gross writeoffs, prior	0
Current-period gross writeoffs, revolving	0
gross writeoffs	(0)	(0)
Agriculture Real Estate [Member]
Financing Receivable, Year One	22,945	28,934
Financing Receivable, Year Two	23,865	32,556
Financing Receivable, Year Three	28,447	35,424
Financing Receivable, Year Four	31,609	29,493
Financing Receivable, Year Five	24,609	6,372
Financing Receivable, Prior	25,843	26,665
Financing Receivable, Revolving	2,562	2,073
Financing Receivable, Total	159,880	161,517
Current-period gross writeoffs, year one	0
Current-period gross writeoffs, year two	0
Current-period gross writeoffs, year three	0
Current-period gross writeoffs, year four	0
Current-period gross writeoffs, year five	0
Current-period gross writeoffs, prior	0
Current-period gross writeoffs, revolving	0
gross writeoffs	(0)	(0)
Pass [Member]
Financing Receivable, Year One	192,911	221,812
Financing Receivable, Year Two	150,012	269,458
Financing Receivable, Year Three	236,458	210,186
Financing Receivable, Year Four	177,975	189,293
Financing Receivable, Year Five	158,171	51,380
Financing Receivable, Prior	83,309	57,062
Financing Receivable, Revolving	149,033	137,803
Financing Receivable, Total	1,147,869	1,136,994
Pass [Member] | Commercial Portfolio Segment [Member]
Financing Receivable, Year One	14,729	23,904
Financing Receivable, Year Two	10,589	12,645
Financing Receivable, Year Three	10,677	10,378
Financing Receivable, Year Four	7,405	2,087
Financing Receivable, Year Five	1,475	2,434
Financing Receivable, Prior	3,298	1,578
Financing Receivable, Revolving	28,192	29,752
Financing Receivable, Total	76,365	82,778
Pass [Member] | Construction Real Estate [Member]
Financing Receivable, Year One	37,743	45,404
Financing Receivable, Year Two	16,689	14,501
Financing Receivable, Year Three	1,640	746
Financing Receivable, Year Four	228	11
Financing Receivable, Year Five	11
Financing Receivable, Prior	161	325
Financing Receivable, Revolving	1,991	1,917
Financing Receivable, Total	58,463	62,904
Pass [Member] | Agriculture [Member]
Financing Receivable, Year One	14,463	14,614
Financing Receivable, Year Two	5,547	8,395
Financing Receivable, Year Three	5,057	5,459
Financing Receivable, Year Four	3,499	2,858
Financing Receivable, Year Five	1,429	400
Financing Receivable, Prior	503	608
Financing Receivable, Revolving	85,222	77,448
Financing Receivable, Total	115,720	109,782
Pass [Member] | Family Residential Real Estate 1-4 [Member]
Financing Receivable, Year One	46,850	55,051
Financing Receivable, Year Two	44,736	66,190
Financing Receivable, Year Three	66,864	59,250
Financing Receivable, Year Four	52,746	47,865
Financing Receivable, Year Five	41,574	8,607
Financing Receivable, Prior	18,767	17,154
Financing Receivable, Revolving	21,325	18,649
Financing Receivable, Total	292,862	272,766
Pass [Member] | Consumer and Other [Member]
Financing Receivable, Year One	5,845	6,801
Financing Receivable, Year Two	4,451	3,719
Financing Receivable, Year Three	2,435	2,701
Financing Receivable, Year Four	1,931	2,071
Financing Receivable, Year Five	1,608	352
Financing Receivable, Prior	758	731
Financing Receivable, Revolving	11	15
Financing Receivable, Total	17,039	16,390
Pass [Member] | Multifamily [Member]
Financing Receivable, Year One	15,316	18,436
Financing Receivable, Year Two	20,441	51,928
Financing Receivable, Year Three	49,932	47,161
Financing Receivable, Year Four	31,822	40,201
Financing Receivable, Year Five	36,556	13,542
Financing Receivable, Prior	10,771	694
Financing Receivable, Revolving	5,735	5,020
Financing Receivable, Total	170,573	176,982
Pass [Member] | Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Year One	37,014	35,133
Financing Receivable, Year Two	30,228	81,342
Financing Receivable, Year Three	71,779	51,598
Financing Receivable, Year Four	51,164	66,467
Financing Receivable, Year Five	53,722	20,006
Financing Receivable, Prior	26,685	13,122
Financing Receivable, Revolving	3,995	2,929
Financing Receivable, Total	274,587	270,597
Pass [Member] | Agriculture Real Estate [Member]
Financing Receivable, Year One	20,951	22,469
Financing Receivable, Year Two	17,331	30,738
Financing Receivable, Year Three	28,074	32,893
Financing Receivable, Year Four	29,180	27,733
Financing Receivable, Year Five	21,796	6,039
Financing Receivable, Prior	22,366	22,850
Financing Receivable, Revolving	2,562	2,073
Financing Receivable, Total	142,260	144,795
Watch [Member]
Financing Receivable, Year One	17,812	20,927
Financing Receivable, Year Two	19,389	16,319
Financing Receivable, Year Three	16,017	36,014
Financing Receivable, Year Four	36,792	18,034
Financing Receivable, Year Five	10,073	522
Financing Receivable, Prior	4,650	4,873
Financing Receivable, Revolving	14,723	10,430
Financing Receivable, Total	119,456	107,119
Watch [Member] | Commercial Portfolio Segment [Member]
Financing Receivable, Year One	726	860
Financing Receivable, Year Two	6,926	295
Financing Receivable, Year Three	215	119
Financing Receivable, Year Four	0	423
Financing Receivable, Year Five	244	93
Financing Receivable, Prior	136	137
Financing Receivable, Revolving	2,138	1,996
Financing Receivable, Total	10,385	3,923
Watch [Member] | Construction Real Estate [Member]
Financing Receivable, Year One	756	80
Financing Receivable, Year Two	0
Financing Receivable, Year Three	0
Financing Receivable, Year Four	0
Financing Receivable, Year Five	0
Financing Receivable, Prior	0
Financing Receivable, Revolving	0
Financing Receivable, Total	756	80
Watch [Member] | Agriculture [Member]
Financing Receivable, Year One	1,822	1,107
Financing Receivable, Year Two	563	340
Financing Receivable, Year Three	356	288
Financing Receivable, Year Four	261	18
Financing Receivable, Year Five	8	18
Financing Receivable, Prior	186	194
Financing Receivable, Revolving	12,249	5,419
Financing Receivable, Total	15,445	7,384
Watch [Member] | Family Residential Real Estate 1-4 [Member]
Financing Receivable, Year One	1,233	1,608
Financing Receivable, Year Two	1,212	298
Financing Receivable, Year Three	91	10,483
Financing Receivable, Year Four	9,535	1,226
Financing Receivable, Year Five	1,003
Financing Receivable, Prior	303	358
Financing Receivable, Revolving	95	27
Financing Receivable, Total	13,472	14,000
Watch [Member] | Consumer and Other [Member]
Financing Receivable, Year One	15	127
Financing Receivable, Year Two	0
Financing Receivable, Year Three	0
Financing Receivable, Year Four	0
Financing Receivable, Year Five	0
Financing Receivable, Prior	0
Financing Receivable, Revolving	0
Financing Receivable, Total	15	127
Watch [Member] | Multifamily [Member]
Financing Receivable, Year One	6,517	4,603
Financing Receivable, Year Two	0	1,427
Financing Receivable, Year Three	0	8,192
Financing Receivable, Year Four	19,971
Financing Receivable, Year Five	0
Financing Receivable, Prior	0
Financing Receivable, Revolving	0
Financing Receivable, Total	26,488	14,222
Watch [Member] | Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Year One	4,749	8,379
Financing Receivable, Year Two	5,429	13,580
Financing Receivable, Year Three	14,982	14,669
Financing Receivable, Year Four	5,484	14,607
Financing Receivable, Year Five	6,005	78
Financing Receivable, Prior	548	583
Financing Receivable, Revolving	241	2,988
Financing Receivable, Total	37,438	54,884
Watch [Member] | Agriculture Real Estate [Member]
Financing Receivable, Year One	1,994	4,163
Financing Receivable, Year Two	5,259	379
Financing Receivable, Year Three	373	2,263
Financing Receivable, Year Four	1,541	1,760
Financing Receivable, Year Five	2,813	333
Financing Receivable, Prior	3,477	3,601
Financing Receivable, Revolving	0
Financing Receivable, Total	15,457	12,499
Special Mention [Member]
Financing Receivable, Year One	0
Financing Receivable, Year Two	0	2,531
Financing Receivable, Year Three	639	11,853
Financing Receivable, Year Four	0	3,006
Financing Receivable, Year Five	3,182	1,043
Financing Receivable, Prior	0
Financing Receivable, Revolving	0
Financing Receivable, Total	3,821	18,433
Special Mention [Member] | Commercial Portfolio Segment [Member]
Financing Receivable, Year One	0
Financing Receivable, Year Two	0
Financing Receivable, Year Three	0
Financing Receivable, Year Four	0
Financing Receivable, Year Five	0
Financing Receivable, Prior	0
Financing Receivable, Revolving	0
Financing Receivable, Total	0
Special Mention [Member] | Construction Real Estate [Member]
Financing Receivable, Year One	0
Financing Receivable, Year Two	0
Financing Receivable, Year Three	0
Financing Receivable, Year Four	0
Financing Receivable, Year Five	0
Financing Receivable, Prior	0
Financing Receivable, Revolving	0
Financing Receivable, Total	0
Special Mention [Member] | Agriculture [Member]
Financing Receivable, Year One	0
Financing Receivable, Year Two	0
Financing Receivable, Year Three	0
Financing Receivable, Year Four	0
Financing Receivable, Year Five	0
Financing Receivable, Prior	0
Financing Receivable, Revolving	0
Financing Receivable, Total	0
Special Mention [Member] | Family Residential Real Estate 1-4 [Member]
Financing Receivable, Year One	0
Financing Receivable, Year Two	0
Financing Receivable, Year Three	639
Financing Receivable, Year Four	0
Financing Receivable, Year Five	289
Financing Receivable, Prior	0
Financing Receivable, Revolving	0
Financing Receivable, Total	928
Special Mention [Member] | Consumer and Other [Member]
Financing Receivable, Year One	0
Financing Receivable, Year Two	0
Financing Receivable, Year Three	0
Financing Receivable, Year Four	0
Financing Receivable, Year Five	0
Financing Receivable, Prior	0
Financing Receivable, Revolving	0
Financing Receivable, Total	0
Special Mention [Member] | Multifamily [Member]
Financing Receivable, Year One	0
Financing Receivable, Year Two	0
Financing Receivable, Year Three	0
Financing Receivable, Year Four	0
Financing Receivable, Year Five	0
Financing Receivable, Prior	0
Financing Receivable, Revolving	0
Financing Receivable, Total	0
Special Mention [Member] | Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Year One	0
Financing Receivable, Year Two	0	2,531
Financing Receivable, Year Three	0	11,853
Financing Receivable, Year Four	0	3,006
Financing Receivable, Year Five	2,893	1,043
Financing Receivable, Prior	0
Financing Receivable, Revolving	0
Financing Receivable, Total	2,893	18,433
Special Mention [Member] | Agriculture Real Estate [Member]
Financing Receivable, Year One	0
Financing Receivable, Year Two	0
Financing Receivable, Year Three	0
Financing Receivable, Year Four	0
Financing Receivable, Year Five	0
Financing Receivable, Prior	0
Financing Receivable, Revolving	0
Financing Receivable, Total	0
Substandard [Member]
Financing Receivable, Year One	3,137	5,123
Financing Receivable, Year Two	4,336	1,727
Financing Receivable, Year Three	24	6,311
Financing Receivable, Year Four	18,026	3,375
Financing Receivable, Year Five	6,935	33
Financing Receivable, Prior	1,099	384
Financing Receivable, Revolving	1,913	1,484
Financing Receivable, Total	35,470	18,437
Substandard [Member] | Commercial Portfolio Segment [Member]
Financing Receivable, Year One	1,150	600
Financing Receivable, Year Two	0	256
Financing Receivable, Year Three	24
Financing Receivable, Year Four	0	421
Financing Receivable, Year Five	0
Financing Receivable, Prior	0
Financing Receivable, Revolving	800	1,484
Financing Receivable, Total	1,974	2,761
Substandard [Member] | Construction Real Estate [Member]
Financing Receivable, Year One	0
Financing Receivable, Year Two	0
Financing Receivable, Year Three	0
Financing Receivable, Year Four	0
Financing Receivable, Year Five	0
Financing Receivable, Prior	0
Financing Receivable, Revolving	0
Financing Receivable, Total	0
Substandard [Member] | Agriculture [Member]
Financing Receivable, Year One	1,159	866
Financing Receivable, Year Two	0	14
Financing Receivable, Year Three	0	25
Financing Receivable, Year Four	72	58
Financing Receivable, Year Five	380
Financing Receivable, Prior	0
Financing Receivable, Revolving	1,113
Financing Receivable, Total	2,724	963
Substandard [Member] | Family Residential Real Estate 1-4 [Member]
Financing Receivable, Year One	0	448
Financing Receivable, Year Two	424	18
Financing Receivable, Year Three	0	1,350
Financing Receivable, Year Four	1,230	47
Financing Receivable, Year Five	0	33
Financing Receivable, Prior	90	64
Financing Receivable, Revolving	0
Financing Receivable, Total	1,744	1,960
Substandard [Member] | Consumer and Other [Member]
Financing Receivable, Year One	0	10
Financing Receivable, Year Two	0
Financing Receivable, Year Three	0
Financing Receivable, Year Four	0
Financing Receivable, Year Five	0
Financing Receivable, Prior	0
Financing Receivable, Revolving	0
Financing Receivable, Total	0	10
Substandard [Member] | Multifamily [Member]
Financing Receivable, Year One	0
Financing Receivable, Year Two	0
Financing Receivable, Year Three	0
Financing Receivable, Year Four	0	2,298
Financing Receivable, Year Five	2,200
Financing Receivable, Prior	0
Financing Receivable, Revolving	0
Financing Receivable, Total	2,200	2,298
Substandard [Member] | Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Year One	828	897
Financing Receivable, Year Two	2,637
Financing Receivable, Year Three	0	4,822
Financing Receivable, Year Four	15,978	551
Financing Receivable, Year Five	4,355
Financing Receivable, Prior	1,009	106
Financing Receivable, Revolving	0
Financing Receivable, Total	24,807	6,376
Substandard [Member] | Agriculture Real Estate [Member]
Financing Receivable, Year One	0	2,302
Financing Receivable, Year Two	1,275	1,439
Financing Receivable, Year Three	0	114
Financing Receivable, Year Four	746
Financing Receivable, Year Five	0
Financing Receivable, Prior	0	214
Financing Receivable, Revolving	0
Financing Receivable, Total	2,021	4,069
Substandard Impaired [Member]
Financing Receivable, Year One	2,874	9,804
Financing Receivable, Year Two	7,852	206
Financing Receivable, Year Three	2,505	781
Financing Receivable, Year Four	427	109
Financing Receivable, Year Five	8	1,610
Financing Receivable, Prior	125	216
Financing Receivable, Revolving	406	469
Financing Receivable, Total	14,197	13,195
Substandard Impaired [Member] | Commercial Portfolio Segment [Member]
Financing Receivable, Year One	782	94
Financing Receivable, Year Two	45
Financing Receivable, Year Three	0	5
Financing Receivable, Year Four	1	96
Financing Receivable, Year Five	0
Financing Receivable, Prior	65	72
Financing Receivable, Revolving	406
Financing Receivable, Total	1,299	267
Substandard Impaired [Member] | Construction Real Estate [Member]
Financing Receivable, Year One	62
Financing Receivable, Year Two	0	66
Financing Receivable, Year Three	0
Financing Receivable, Year Four	0
Financing Receivable, Year Five	0
Financing Receivable, Prior	0
Financing Receivable, Revolving	0
Financing Receivable, Total	62	66
Substandard Impaired [Member] | Agriculture [Member]
Financing Receivable, Year One	0	95
Financing Receivable, Year Two	54	140
Financing Receivable, Year Three	0	383
Financing Receivable, Year Four	214
Financing Receivable, Year Five	0
Financing Receivable, Prior	0
Financing Receivable, Revolving	0	389
Financing Receivable, Total	268	1,007
Substandard Impaired [Member] | Family Residential Real Estate 1-4 [Member]
Financing Receivable, Year One	568	115
Financing Receivable, Year Two	0
Financing Receivable, Year Three	0	140
Financing Receivable, Year Four	70
Financing Receivable, Year Five	0	199
Financing Receivable, Prior	60	144
Financing Receivable, Revolving	0	80
Financing Receivable, Total	698	678
Substandard Impaired [Member] | Consumer and Other [Member]
Financing Receivable, Year One	1
Financing Receivable, Year Two	0
Financing Receivable, Year Three	3
Financing Receivable, Year Four	0	13
Financing Receivable, Year Five	8
Financing Receivable, Prior	0
Financing Receivable, Revolving	0
Financing Receivable, Total	12	13
Substandard Impaired [Member] | Multifamily [Member]
Financing Receivable, Year One	948	983
Financing Receivable, Year Two	0
Financing Receivable, Year Three	0
Financing Receivable, Year Four	0
Financing Receivable, Year Five	0	1,051
Financing Receivable, Prior	0
Financing Receivable, Revolving	0
Financing Receivable, Total	948	2,034
Substandard Impaired [Member] | Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Year One	513	8,517
Financing Receivable, Year Two	7,753
Financing Receivable, Year Three	2,502	99
Financing Receivable, Year Four	0
Financing Receivable, Year Five	0	360
Financing Receivable, Prior	0
Financing Receivable, Revolving	0
Financing Receivable, Total	10,768	8,976
Substandard Impaired [Member] | Agriculture Real Estate [Member]
Financing Receivable, Year One	0
Financing Receivable, Year Two	0
Financing Receivable, Year Three	0	154
Financing Receivable, Year Four	142
Financing Receivable, Year Five	0
Financing Receivable, Prior	0
Financing Receivable, Revolving	0
Financing Receivable, Total	$ 142	$ 154

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