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Note 3 - Loans and Allowance for Loan Losses - Allowance for Loan Losses and Balance in the Loan Portfolio (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Beginning balance	$ 7,688	$ 7,593	$ 4,057
Charge-offs	(673)	(676)	(754)
Recoveries	354	355	290
Provision	250	416	4,000
Ending balance	7,619	7,688	7,593
Individually evaluated for impairment	153	503	431
Collectively evaluated for impairment	7,466	7,185	7,162
Individually evaluated for impairment	2,846	5,433	7,851
Collectively evaluated for impairment	1,172,662	994,248	1,039,745
Acquired with deteriorated credit quality	14,274	17,167	22,072
Loans	1,189,782	1,016,848	1,069,668
Agricultural [Member]
Beginning balance	448	257	471
Charge-offs	0	0	(15)
Recoveries	0	0	0
Provision	(304)	191	(199)
Ending balance	144	448	257
Individually evaluated for impairment	2	251	0
Collectively evaluated for impairment	142	197	257
Individually evaluated for impairment	23	2,616	348
Collectively evaluated for impairment	64,136	62,203	53,387
Acquired with deteriorated credit quality	0	0	0
Loans	64,159	64,819	53,735
Commercial and Industrial [Member]
Beginning balance	1,454	1,327	655
Charge-offs	(177)	(195)	(148)
Recoveries	143	86	57
Provision	(59)	236	763
Ending balance	1,361	1,454	1,327
Individually evaluated for impairment	14	95	19
Collectively evaluated for impairment	1,347	1,359	1,308
Individually evaluated for impairment	177	339	1,663
Collectively evaluated for impairment	206,074	197,656	295,154
Acquired with deteriorated credit quality	3,959	5,029	6,710
Loans	210,210	203,024	303,527
Consumer Portfolio Segment [Member]
Beginning balance	290	317	270
Charge-offs	(496)	(370)	(329)
Recoveries	206	214	204
Provision	310	129	172
Ending balance	310	290	317
Individually evaluated for impairment	1	2	1
Collectively evaluated for impairment	309	288	316
Individually evaluated for impairment	7	14	8
Collectively evaluated for impairment	39,793	35,148	33,982
Acquired with deteriorated credit quality	8	12	24
Loans	39,808	35,174	34,014
Commercial Real Estate Portfolio Segment [Member]
Beginning balance	3,705	4,178	1,663
Charge-offs	0	(111)	(254)
Recoveries	3	48	10
Provision	1,114	(410)	2,759
Ending balance	4,822	3,705	4,178
Individually evaluated for impairment	5	9	157
Collectively evaluated for impairment	4,817	3,696	4,021
Individually evaluated for impairment	165	273	3,032
Collectively evaluated for impairment	622,131	515,528	453,681
Acquired with deteriorated credit quality	8,657	10,083	12,534
Loans	630,953	525,884	469,247
Construction Real Estate [Member]
Beginning balance	110	97	76
Charge-offs	0	0	0
Recoveries	0	0	0
Provision	(47)	13	21
Ending balance	63	110	97
Individually evaluated for impairment	0	0	0
Collectively evaluated for impairment	63	110	97
Individually evaluated for impairment	0	0	80
Collectively evaluated for impairment	14,736	19,066	16,559
Acquired with deteriorated credit quality	0	0	0
Loans	14,736	19,066	16,639
Residential Portfolio Segment [Member]
Beginning balance	671	1,300	640
Charge-offs	0	0	(8)
Recoveries	2	7	19
Provision	233	(636)	649
Ending balance	906	671	1,300
Individually evaluated for impairment	131	146	254
Collectively evaluated for impairment	775	525	1,046
Individually evaluated for impairment	2,474	2,191	2,720
Collectively evaluated for impairment	225,792	164,647	186,982
Acquired with deteriorated credit quality	1,650	2,043	2,804
Loans	229,916	168,881	192,506
Unallocated Financing Receivables [Member]
Beginning balance	1,010	117	282
Charge-offs	0	0	0
Recoveries	0	0	0
Provision	(997)	893	(165)
Ending balance	13	1,010	117
Individually evaluated for impairment	0	0	0
Collectively evaluated for impairment	$ 13	$ 1,010	$ 117

X

- Definition

The balance of financing receivables that were acquired with deteriorated credit quality.

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Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements.

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Amount before allowance and after deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements.

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