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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, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Beginning balance	$ 7,950	$ 5,750	$ 7,593	$ 4,057
Charge-offs	(257)	(343)	(550)	(551)
Recoveries	62	53	296	179
Provision	0	1,225	416	3,000
Ending balance	7,755	6,685	7,755	6,685
Individually evaluated for impairment	483	233	483	233	$ 431
Collectively evaluated for impairment	7,272	6,452	7,272	6,452	7,162
Individually evaluated for impairment	5,956	5,089	5,956	5,089	7,851
Collectively evaluated for impairment	964,458	1,050,580	964,458	1,050,580	1,039,745
Acquired with deteriorated credit quality	17,943	23,127	17,943	23,127	22,072
Loans	988,357	1,078,796	988,357	1,078,796	1,069,668
Agricultural [Member]
Beginning balance	374	252	257	471
Charge-offs	0	0	0	0
Recoveries	0	0	0	0
Provision	144	17	261	(202)
Ending balance	518	269	518	269
Individually evaluated for impairment	124	0	124	0	0
Collectively evaluated for impairment	394	269	394	269	257
Individually evaluated for impairment	3,051	373	3,051	373	348
Collectively evaluated for impairment	60,394	53,130	60,394	53,130	53,387
Acquired with deteriorated credit quality	0	0	0	0	0
Loans	63,445	53,503	63,445	53,503	53,735
Commercial and Industrial [Member]
Beginning balance	1,523	1,398	1,327	655
Charge-offs	(96)	(29)	(195)	(46)
Recoveries	7	1	80	2
Provision	168	(285)	390	474
Ending balance	1,602	1,085	1,602	1,085
Individually evaluated for impairment	174	1	174	1	19
Collectively evaluated for impairment	1,428	1,084	1,428	1,084	1,308
Individually evaluated for impairment	296	345	296	345	1,663
Collectively evaluated for impairment	211,695	297,886	211,695	297,886	295,154
Acquired with deteriorated credit quality	5,251	7,889	5,251	7,889	6,710
Loans	217,242	306,120	217,242	306,120	303,527
Consumer Portfolio Segment [Member]
Beginning balance	243	243	317	270
Charge-offs	(98)	(58)	(244)	(242)
Recoveries	54	46	168	156
Provision	33	48	(9)	95
Ending balance	232	279	232	279
Individually evaluated for impairment	0	1	0	1	1
Collectively evaluated for impairment	232	278	232	278	316
Individually evaluated for impairment	0	19	0	19	8
Collectively evaluated for impairment	33,793	34,104	33,793	34,104	33,982
Acquired with deteriorated credit quality	13	30	13	30	24
Loans	33,806	34,153	33,806	34,153	34,014
Commercial Real Estate Portfolio Segment [Member]
Beginning balance	4,377	2,833	4,178	1,663
Charge-offs	(63)	(255)	(111)	(255)
Recoveries	0	4	43	4
Provision	(154)	961	50	2,131
Ending balance	4,160	3,543	4,160	3,543
Individually evaluated for impairment	8	13	8	13	157
Collectively evaluated for impairment	4,152	3,530	4,152	3,530	4,021
Individually evaluated for impairment	418	2,149	418	2,149	3,032
Collectively evaluated for impairment	474,425	449,041	474,425	449,041	453,681
Acquired with deteriorated credit quality	10,489	12,116	10,489	12,116	12,534
Loans	485,332	463,306	485,332	463,306	469,247
Construction Real Estate [Member]
Beginning balance	74	79	97	76
Charge-offs	0	0	0	0
Recoveries	0	0	0	0
Provision	39	31	16	34
Ending balance	113	110	113	110
Individually evaluated for impairment	0	0	0	0	0
Collectively evaluated for impairment	113	110	113	110	97
Individually evaluated for impairment	0	0	0	0	80
Collectively evaluated for impairment	18,238	16,489	18,238	16,489	16,559
Acquired with deteriorated credit quality	0	0	0	0	0
Loans	18,238	16,489	18,238	16,489	16,639
Residential Portfolio Segment [Member]
Beginning balance	860	945	1,300	640
Charge-offs	0	(1)	0	(8)
Recoveries	1	2	5	17
Provision	80	122	(364)	419
Ending balance	941	1,068	941	1,068
Individually evaluated for impairment	177	218	177	218	254
Collectively evaluated for impairment	764	850	764	850	1,046
Individually evaluated for impairment	2,191	2,203	2,191	2,203	2,720
Collectively evaluated for impairment	165,913	199,930	165,913	199,930	186,982
Acquired with deteriorated credit quality	2,190	3,092	2,190	3,092	2,804
Loans	170,294	205,225	170,294	205,225	192,506
Unallocated Financing Receivables [Member]
Beginning balance	499	0	117	282
Charge-offs	0	0	0	0
Recoveries	0	0	0	0
Provision	(310)	331	72	49
Ending balance	189	331	189	331
Individually evaluated for impairment	0	0	0	0	0
Collectively evaluated for impairment	189	331	189	331	117
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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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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