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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, 2021	Dec. 31, 2020	Dec. 31, 2019
Beginning balance	$ 7,593	$ 4,057	$ 4,673
Charge-offs	(676)	(754)	(989)
Recoveries	355	290	373
Provision	416	4,000	0
Ending balance	7,688	7,593	4,057
Individually evaluated for impairment	503	431	355
Collectively evaluated for impairment	7,185	7,162	3,702
Individually evaluated for impairment	5,433	7,851	5,922
Collectively evaluated for impairment	994,248	1,039,745	788,397
Acquired with deteriorated credit quality	17,167	22,072	7,729
Loans	1,016,848	1,069,668	802,048
Agricultural [Member]
Beginning balance	257	471	481
Charge-offs	0	(15)	0
Recoveries	0	0	65
Provision	191	(199)	(75)
Ending balance	448	257	471
Individually evaluated for impairment	251	0	103
Collectively evaluated for impairment	197	257	368
Individually evaluated for impairment	2,616	348	924
Collectively evaluated for impairment	62,203	53,387	56,415
Acquired with deteriorated credit quality	0	0	0
Loans	64,819	53,735	57,339
Commercial and Industrial [Member]
Beginning balance	1,327	655	892
Charge-offs	(195)	(148)	(83)
Recoveries	86	57	22
Provision	236	763	(176)
Ending balance	1,454	1,327	655
Individually evaluated for impairment	95	19	0
Collectively evaluated for impairment	1,359	1,308	655
Individually evaluated for impairment	339	1,663	259
Collectively evaluated for impairment	197,656	295,154	141,583
Acquired with deteriorated credit quality	5,029	6,710	6,241
Loans	203,024	303,527	148,083
Consumer Portfolio Segment [Member]
Beginning balance	317	270	254
Charge-offs	(370)	(329)	(292)
Recoveries	214	204	136
Provision	129	172	172
Ending balance	290	317	270
Individually evaluated for impairment	2	1	4
Collectively evaluated for impairment	288	316	266
Individually evaluated for impairment	14	8	17
Collectively evaluated for impairment	35,148	33,982	38,524
Acquired with deteriorated credit quality	12	24	313
Loans	35,174	34,014	38,854
Commercial Real Estate Portfolio Segment [Member]
Beginning balance	4,178	1,663	1,926
Charge-offs	(111)	(254)	(589)
Recoveries	48	10	26
Provision	(410)	2,759	300
Ending balance	3,705	4,178	1,663
Individually evaluated for impairment	9	157	13
Collectively evaluated for impairment	3,696	4,021	1,650
Individually evaluated for impairment	273	3,032	2,288
Collectively evaluated for impairment	515,528	453,681	323,358
Acquired with deteriorated credit quality	10,083	12,534	733
Loans	525,884	469,247	326,379
Construction Real Estate [Member]
Beginning balance	97	76	38
Charge-offs	0	0	0
Recoveries	0	0	0
Provision	13	21	38
Ending balance	110	97	76
Individually evaluated for impairment	0	0	0
Collectively evaluated for impairment	110	97	76
Individually evaluated for impairment	0	80	0
Collectively evaluated for impairment	19,066	16,559	13,411
Acquired with deteriorated credit quality	0	0	0
Loans	19,066	16,639	13,411
Residential Portfolio Segment [Member]
Beginning balance	1,300	640	537
Charge-offs	0	(8)	(25)
Recoveries	7	19	124
Provision	(636)	649	4
Ending balance	671	1,300	640
Individually evaluated for impairment	146	254	235
Collectively evaluated for impairment	525	1,046	405
Individually evaluated for impairment	2,191	2,720	2,434
Collectively evaluated for impairment	164,647	186,982	215,106
Acquired with deteriorated credit quality	2,043	2,804	442
Loans	168,881	192,506	217,982
Unallocated Financing Receivables [Member]
Beginning balance	117	282	545
Charge-offs	0	0	0
Recoveries	0	0	0
Provision	893	(165)	(263)
Ending balance	1,010	117	282
Individually evaluated for impairment	0	0	0
Collectively evaluated for impairment	$ 1,010	$ 117	$ 282

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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