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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
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Beginning balance	$ 7,688	$ 7,593
Charge-offs	(143)	(193)
Recoveries	56	90
Provision	0	250
Ending balance	7,601	7,740
Individually evaluated for impairment	548	339	$ 503
Collectively evaluated for impairment	7,053	7,401	7,185
Individually evaluated for impairment	4,940	10,389	5,433
Collectively evaluated for impairment	1,006,826	1,004,457	994,248
Acquired with deteriorated credit quality	15,640	20,237	17,167
Loans	1,027,406	1,035,083	1,016,848
Agricultural [Member]
Beginning balance	448	257
Charge-offs	0	0
Recoveries	0	0
Provision	(61)	85
Ending balance	387	342
Individually evaluated for impairment	253	114	251
Collectively evaluated for impairment	134	227	197
Individually evaluated for impairment	2,542	3,173	2,616
Collectively evaluated for impairment	59,076	43,513	62,203
Acquired with deteriorated credit quality	0	0	0
Loans	61,618	46,686	64,819
Commercial and Industrial [Member]
Beginning balance	1,454	1,327
Charge-offs	(31)	(74)
Recoveries	2	9
Provision	327	337
Ending balance	1,752	1,599
Individually evaluated for impairment	116	2	95
Collectively evaluated for impairment	1,636	1,596	1,359
Individually evaluated for impairment	356	1,626	339
Collectively evaluated for impairment	194,024	290,140	197,656
Acquired with deteriorated credit quality	4,534	6,284	5,029
Loans	198,914	298,050	203,024
Consumer Portfolio Segment [Member]
Beginning balance	290	317
Charge-offs	(112)	(71)
Recoveries	52	79
Provision	74	(78)
Ending balance	304	247
Individually evaluated for impairment	3	0	2
Collectively evaluated for impairment	301	246	288
Individually evaluated for impairment	32	0	14
Collectively evaluated for impairment	36,108	32,311	35,148
Acquired with deteriorated credit quality	11	19	12
Loans	36,151	32,330	35,174
Commercial Real Estate Portfolio Segment [Member]
Beginning balance	3,705	4,178
Charge-offs	0	(48)
Recoveries	1	0
Provision	(16)	215
Ending balance	3,690	4,345
Individually evaluated for impairment	9	10	9
Collectively evaluated for impairment	3,681	4,337	3,696
Individually evaluated for impairment	157	3,001	273
Collectively evaluated for impairment	527,743	448,261	515,528
Acquired with deteriorated credit quality	9,352	11,159	10,083
Loans	537,252	462,421	525,884
Construction Real Estate [Member]
Beginning balance	110	97
Charge-offs	0	0
Recoveries	0	0
Provision	(73)	(23)
Ending balance	37	74
Individually evaluated for impairment	0	0	0
Collectively evaluated for impairment	37	75	110
Individually evaluated for impairment	0	0	0
Collectively evaluated for impairment	15,669	15,670	19,066
Acquired with deteriorated credit quality	0	0	0
Loans	15,669	15,670	19,066
Residential Portfolio Segment [Member]
Beginning balance	671	1,300
Charge-offs	0	0
Recoveries	1	2
Provision	(83)	(278)
Ending balance	589	1,024
Individually evaluated for impairment	167	213	146
Collectively evaluated for impairment	422	811	525
Individually evaluated for impairment	1,853	2,589	2,191
Collectively evaluated for impairment	174,206	174,562	164,647
Acquired with deteriorated credit quality	1,743	2,775	2,043
Loans	177,802	179,926	168,881
Unallocated Financing Receivables [Member]
Beginning balance	1,010	117
Charge-offs	0	0
Recoveries	0	0
Provision	(168)	(8)
Ending balance	842	109
Individually evaluated for impairment	0	0	0
Collectively evaluated for impairment	842	109	1,010
Individually evaluated for impairment
Collectively evaluated for impairment
Acquired with deteriorated credit quality
Loans

X

- Definition

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

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The valuation allowance for financing receivables that are expected to be uncollectible that were collectively evaluated for impairment.

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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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