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Note 7 - Loans - Loan Balances and Allowance for Loan Losses for Each Impairment Method (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019	Mar. 31, 2019	Dec. 31, 2018
Loans receivable: individually evaluated	$ 8,290	$ 5,486
Loans receivable: collectively evaluated	926,958	939,762
Loans receivable	1,167,473	1,182,222
Allowance for loan losses: individually evaluated	2,227	1,051
Allowance for loan losses: collectively evaluated	8,518	8,200
Allowance for loan losses	11,330	9,836	$ 8,256	$ 9,309
Financial Asset Acquired and No Credit Deterioration [Member]
Loans receivable	232,225	236,974
Residential Portfolio Segment [Member]
Loans receivable: individually evaluated	923	1,391
Loans receivable: collectively evaluated	474,985	476,703
Loans receivable	581,626	586,580
Allowance for loan losses: individually evaluated	194	176
Allowance for loan losses: collectively evaluated	4,189	4,006
Allowance for loan losses	4,383	4,182	3,991	3,986
Residential Portfolio Segment [Member] | Financial Asset Acquired and No Credit Deterioration [Member]
Loans receivable	105,718	108,486
Residential Portfolio Segment [Member] | Real Estate Loan [Member] | Senior Lien [Member]
Loans receivable: individually evaluated	556	1,023
Loans receivable: collectively evaluated	405,687	405,186
Loans receivable	508,387	510,641
Allowance for loan losses: individually evaluated	0	0
Allowance for loan losses: collectively evaluated	3,572	3,405
Allowance for loan losses	3,572	3,405	3,178	3,156
Residential Portfolio Segment [Member] | Real Estate Loan [Member] | Senior Lien [Member] | Financial Asset Acquired and No Credit Deterioration [Member]
Loans receivable	102,144	104,432
Residential Portfolio Segment [Member] | Real Estate Loan [Member] | Junior Lien [Member]
Loans receivable: individually evaluated	367	368
Loans receivable: collectively evaluated	24,755	24,730
Loans receivable	27,028	27,503
Allowance for loan losses: individually evaluated	194	176
Allowance for loan losses: collectively evaluated	220	208
Allowance for loan losses	414	384	329	325
Residential Portfolio Segment [Member] | Real Estate Loan [Member] | Junior Lien [Member] | Financial Asset Acquired and No Credit Deterioration [Member]
Loans receivable	1,906	2,405
Residential Portfolio Segment [Member] | Home Equity Line of Credit 1 [Member]
Loans receivable: individually evaluated	0	0
Loans receivable: collectively evaluated	30,580	32,147
Loans receivable	32,090	33,638
Allowance for loan losses: individually evaluated	0	0
Allowance for loan losses: collectively evaluated	278	276
Allowance for loan losses	278	276	286	302
Residential Portfolio Segment [Member] | Home Equity Line of Credit 1 [Member] | Financial Asset Acquired and No Credit Deterioration [Member]
Loans receivable	1,510	1,491
Residential Portfolio Segment [Member] | Construction Loans [Member]
Loans receivable: individually evaluated	0	0
Loans receivable: collectively evaluated	13,963	14,640
Loans receivable	14,121	14,798
Allowance for loan losses: individually evaluated	0	0
Allowance for loan losses: collectively evaluated	119	117
Allowance for loan losses	119	117	198	203
Residential Portfolio Segment [Member] | Construction Loans [Member] | Financial Asset Acquired and No Credit Deterioration [Member]
Loans receivable	158	158
Commercial Portfolio Segment [Member]
Loans receivable: individually evaluated	7,367	4,095
Loans receivable: collectively evaluated	435,457	446,318
Loans receivable	569,331	578,901
Allowance for loan losses: individually evaluated	2,033	875
Allowance for loan losses: collectively evaluated	4,056	3,913
Allowance for loan losses	6,089	4,788	3,444	4,591
Commercial Portfolio Segment [Member] | Financial Asset Acquired and No Credit Deterioration [Member]
Loans receivable	126,507	128,488
Commercial Portfolio Segment [Member] | Real Estate Loan [Member]
Loans receivable: individually evaluated	714	684
Loans receivable: collectively evaluated	193,507	198,532
Loans receivable	295,860	301,227
Allowance for loan losses: individually evaluated	0	0
Allowance for loan losses: collectively evaluated	1,932	1,921
Allowance for loan losses	1,932	1,921	1,887	2,538
Commercial Portfolio Segment [Member] | Real Estate Loan [Member] | Financial Asset Acquired and No Credit Deterioration [Member]
Loans receivable	101,639	102,011
Commercial Portfolio Segment [Member] | Construction Loans [Member]
Loans receivable: individually evaluated	1,255	1,261
Loans receivable: collectively evaluated	29,308	29,710
Loans receivable	33,340	33,555
Allowance for loan losses: individually evaluated	674	678
Allowance for loan losses: collectively evaluated	296	288
Allowance for loan losses	970	966	114	110
Commercial Portfolio Segment [Member] | Construction Loans [Member] | Financial Asset Acquired and No Credit Deterioration [Member]
Loans receivable	2,777	2,584
Commercial Portfolio Segment [Member] | Commercial and Industrial [Member]
Loans receivable: individually evaluated	4,974	1,467
Loans receivable: collectively evaluated	124,917	122,313
Loans receivable	132,308	126,374
Allowance for loan losses: individually evaluated	1,325	149
Allowance for loan losses: collectively evaluated	1,320	1,242
Allowance for loan losses	2,645	1,391	1,069	1,553
Commercial Portfolio Segment [Member] | Commercial and Industrial [Member] | Financial Asset Acquired and No Credit Deterioration [Member]
Loans receivable	2,417	2,594
Commercial Portfolio Segment [Member] | Political Subdivisions [Member]
Loans receivable: individually evaluated	0	0
Loans receivable: collectively evaluated	43,613	53,570
Loans receivable	43,613	53,570
Allowance for loan losses: individually evaluated	0	0
Allowance for loan losses: collectively evaluated	0	0
Allowance for loan losses	0	0
Commercial Portfolio Segment [Member] | Political Subdivisions [Member] | Financial Asset Acquired and No Credit Deterioration [Member]
Loans receivable	0	0
Commercial Portfolio Segment [Member] | Loans Secured by Farmland [Member]
Loans receivable: individually evaluated	424	607
Loans receivable: collectively evaluated	10,845	11,386
Loans receivable	11,524	12,251
Allowance for loan losses: individually evaluated	34	48
Allowance for loan losses: collectively evaluated	110	110
Allowance for loan losses	144	158	98	102
Commercial Portfolio Segment [Member] | Loans Secured by Farmland [Member] | Financial Asset Acquired and No Credit Deterioration [Member]
Loans receivable	255	258
Commercial Portfolio Segment [Member] | Multifamily 5 or More Residential [Member]
Loans receivable: individually evaluated	0	0
Loans receivable: collectively evaluated	13,517	10,617
Loans receivable	32,370	31,070
Allowance for loan losses: individually evaluated	0	0
Allowance for loan losses: collectively evaluated	199	156
Allowance for loan losses	199	156	112	114
Commercial Portfolio Segment [Member] | Multifamily 5 or More Residential [Member] | Financial Asset Acquired and No Credit Deterioration [Member]
Loans receivable	18,853	20,453
Commercial Portfolio Segment [Member] | Agricultural Loans [Member]
Loans receivable: individually evaluated	0	76
Loans receivable: collectively evaluated	3,886	4,243
Loans receivable	3,886	4,319
Allowance for loan losses: individually evaluated	0	0
Allowance for loan losses: collectively evaluated	39	41
Allowance for loan losses	39	41	43	46
Commercial Portfolio Segment [Member] | Agricultural Loans [Member] | Financial Asset Acquired and No Credit Deterioration [Member]
Loans receivable	0	0
Commercial Portfolio Segment [Member] | Other Commercial Loans [Member]
Loans receivable: individually evaluated	0	0
Loans receivable: collectively evaluated	15,864	15,947
Loans receivable	16,430	16,535
Allowance for loan losses: individually evaluated	0	0
Allowance for loan losses: collectively evaluated	160	155
Allowance for loan losses	160	155	121	128
Commercial Portfolio Segment [Member] | Other Commercial Loans [Member] | Financial Asset Acquired and No Credit Deterioration [Member]
Loans receivable	566	588
Consumer Portfolio Segment [Member]
Loans receivable: individually evaluated	0	0
Loans receivable: collectively evaluated	16,516	16,741
Loans receivable	16,516	16,741
Allowance for loan losses: individually evaluated	0	0
Allowance for loan losses: collectively evaluated	273	281
Allowance for loan losses	273	281	236	233
Consumer Portfolio Segment [Member] | Financial Asset Acquired and No Credit Deterioration [Member]
Loans receivable	0	0
Unallocated Financing Receivables [Member]
Loans receivable: individually evaluated	0	0
Loans receivable: collectively evaluated	0	0
Loans receivable	0	0
Allowance for loan losses: individually evaluated	0	0
Allowance for loan losses: collectively evaluated
Allowance for loan losses	$ 585	$ 585	$ 585	$ 499

X

- Definition

Amount of allowance for credit loss on financing receivable. Excludes allowance for financing receivable covered under loss sharing agreement.

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

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