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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	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Beginning balance	$ 7,416	$ 7,950	$ 7,688	$ 7,593
Charge-offs	(175)	(257)	(560)	(550)
Recoveries	116	62	229	296
Provision	100	0	100	416
Ending balance	7,457	7,755	7,457	7,755
Individually evaluated for impairment	157	483	157	483	$ 503
Collectively evaluated for impairment	7,300	7,272	7,300	7,272	7,185
Individually evaluated for impairment	2,637	5,956	2,637	5,956	5,433
Collectively evaluated for impairment	1,115,501	964,458	1,115,501	964,458	994,248
Acquired with deteriorated credit quality	14,263	17,943	14,263	17,943	17,167
Loans	1,132,401	988,357	1,132,401	988,357	1,016,848
Agricultural [Member]
Beginning balance	132	374	448	257
Charge-offs	0	0	0	0
Recoveries	0	0	0	0
Provision	8	144	(308)	261
Ending balance	140	518	140	518
Individually evaluated for impairment	1	124	1	124	251
Collectively evaluated for impairment	139	394	139	394	197
Individually evaluated for impairment	312	3,051	312	3,051	2,616
Collectively evaluated for impairment	63,035	60,394	63,035	60,394	62,203
Acquired with deteriorated credit quality	0	0	0	0	0
Loans	63,347	63,445	63,347	63,445	64,819
Commercial and Industrial [Member]
Beginning balance	1,613	1,523	1,454	1,327
Charge-offs	(47)	(96)	(177)	(195)
Recoveries	59	7	62	80
Provision	(252)	168	34	390
Ending balance	1,373	1,602	1,373	1,602
Individually evaluated for impairment	6	174	6	174	95
Collectively evaluated for impairment	1,367	1,428	1,367	1,428	1,359
Individually evaluated for impairment	108	296	108	296	339
Collectively evaluated for impairment	204,686	211,695	204,686	211,695	197,656
Acquired with deteriorated credit quality	3,796	5,251	3,796	5,251	5,029
Loans	208,590	217,242	208,590	217,242	203,024
Consumer Portfolio Segment [Member]
Beginning balance	309	243	290	317
Charge-offs	(128)	(98)	(383)	(244)
Recoveries	56	54	162	168
Provision	66	33	234	(9)
Ending balance	303	232	303	232
Individually evaluated for impairment	1	0	1	0	2
Collectively evaluated for impairment	302	232	302	232	288
Individually evaluated for impairment	7	0	7	0	14
Collectively evaluated for impairment	38,340	33,793	38,340	33,793	35,148
Acquired with deteriorated credit quality	9	13	9	13	12
Loans	38,356	33,806	38,356	33,806	35,174
Commercial Real Estate Portfolio Segment [Member]
Beginning balance	4,224	4,377	3,705	4,178
Charge-offs	0	(63)	0	(111)
Recoveries	1	0	3	43
Provision	384	(154)	901	50
Ending balance	4,609	4,160	4,609	4,160
Individually evaluated for impairment	6	8	6	8	9
Collectively evaluated for impairment	4,603	4,152	4,603	4,152	3,696
Individually evaluated for impairment	140	418	140	418	273
Collectively evaluated for impairment	584,274	474,425	584,274	474,425	515,528
Acquired with deteriorated credit quality	8,781	10,489	8,781	10,489	10,083
Loans	593,195	485,332	593,195	485,332	525,884
Construction Real Estate [Member]
Beginning balance	45	74	110	97
Charge-offs	0	0	0	0
Recoveries	0	0	0	0
Provision	14	39	(51)	16
Ending balance	59	113	59	113
Individually evaluated for impairment	0	0	0	0	0
Collectively evaluated for impairment	59	113	59	113	110
Individually evaluated for impairment	0	0	0	0	0
Collectively evaluated for impairment	14,299	18,238	14,299	18,238	19,066
Acquired with deteriorated credit quality	0	0	0	0	0
Loans	14,299	18,238	14,299	18,238	19,066
Residential Portfolio Segment [Member]
Beginning balance	691	860	671	1,300
Charge-offs	0	0	0	0
Recoveries	0	1	2	5
Provision	178	80	196	(364)
Ending balance	869	941	869	941
Individually evaluated for impairment	143	177	143	177	146
Collectively evaluated for impairment	726	764	726	764	525
Individually evaluated for impairment	2,070	2,191	2,070	2,191	2,191
Collectively evaluated for impairment	210,867	165,913	210,867	165,913	164,647
Acquired with deteriorated credit quality	1,677	2,190	1,677	2,190	2,043
Loans	214,614	170,294	214,614	170,294	168,881
Unallocated Financing Receivables [Member]
Beginning balance	402	499	1,010	117
Charge-offs	0	0	0	0
Recoveries	0	0	0	0
Provision	(298)	(310)	(906)	72
Ending balance	104	189	104	189
Individually evaluated for impairment	0	0	0	0	0
Collectively evaluated for impairment	104	189	104	189	1,010
Individually evaluated for impairment	0		0
Collectively evaluated for impairment	0		0
Acquired with deteriorated credit quality	0		0
Loans

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

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Amount of increase in allowance for credit loss on financing receivable from recovery.

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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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