Note 4 - Loans - Activity in the Allowance for Loan Losses, by Loan Category (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2020	Dec. 31, 2019
Balance	$ 8,950	$ 9,519
Charge-offs	(329)	(454)
Recoveries	135	342
Provision (credit) for loan and lease losses	1,151	(154)
Balance	9,907	9,253
Individually evaluated for impairment			$ 423	$ 473
Collectively evaluated for impairment			9,484	8,477
Total	9,907	9,253	9,907	8,950
Individually evaluated for impairment			15,125	15,786
Financing Receivable, Collectively Evaluated for Impairment			818,029	810,570
Total			833,154	826,356
Residential Portfolio Segment [Member]
Total			171,764	170,723
Residential Portfolio Segment [Member] \| Real Estate Loan [Member]
Balance	1,147	1,175
Charge-offs
Recoveries	2	4
Provision (credit) for loan and lease losses	158	(24)
Balance	1,307	1,155
Individually evaluated for impairment			8	9
Collectively evaluated for impairment			1,299	1,138
Total	1,307	1,155	1,307	1,147
Individually evaluated for impairment			2,558	2,711
Financing Receivable, Collectively Evaluated for Impairment			169,206	168,012
Total			171,764	170,723
Commercial Real Estate Portfolio Segment [Member]
Total			276,662	278,379
Commercial Real Estate Portfolio Segment [Member] \| Real Estate Loan [Member]
Balance	3,198	3,107
Charge-offs	(56)
Recoveries
Provision (credit) for loan and lease losses	415	(56)
Balance	3,557	3,051
Individually evaluated for impairment			205	221
Collectively evaluated for impairment			3,352	2,977
Total	3,557	3,051	3,557	3,198
Individually evaluated for impairment			11,309	11,640
Financing Receivable, Collectively Evaluated for Impairment			265,353	266,739
Total			276,662	278,379
Construction, Land Acquisition and Development [Member]
Total			43,929	47,484
Construction, Land Acquisition and Development [Member] \| Real Estate Loan [Member]
Balance	271	188
Charge-offs
Recoveries		81
Provision (credit) for loan and lease losses	12	(163)
Balance	283	106
Individually evaluated for impairment
Collectively evaluated for impairment			283	271
Total	283	106	283	271
Individually evaluated for impairment			74	76
Financing Receivable, Collectively Evaluated for Impairment			43,855	47,408
Total			43,929	47,484
Commercial and Industrial [Member]
Balance	1,997	2,552
Charge-offs	(35)	(139)
Recoveries	59	84
Provision (credit) for loan and lease losses	283	2
Balance	2,304	2,499
Individually evaluated for impairment			209	242
Collectively evaluated for impairment			2,095	1,755
Total	2,304	2,499	2,304	1,997
Individually evaluated for impairment			992	1,164
Financing Receivable, Collectively Evaluated for Impairment			160,662	146,459
Total			161,654	147,623
Consumer Portfolio Segment [Member]
Balance	1,658	2,051
Charge-offs	(238)	(315)
Recoveries	74	173
Provision (credit) for loan and lease losses	220	54
Balance	1,714	1,963
Individually evaluated for impairment			1	1
Collectively evaluated for impairment			1,713	1,657
Total	1,714	1,963	1,714	1,658
Individually evaluated for impairment			192	195
Financing Receivable, Collectively Evaluated for Impairment			129,000	138,044
Total			129,192	138,239
State and Political Subdivisions [Member]
Balance	253	417
Charge-offs	0
Recoveries	0
Provision (credit) for loan and lease losses	17	6
Balance	270	423
Individually evaluated for impairment
Collectively evaluated for impairment			270	253
Total	270	423	270	253
Individually evaluated for impairment
Financing Receivable, Collectively Evaluated for Impairment			49,953	43,908
Total			49,953	43,908
Unallocated Financing Receivables [Member]
Balance	426	29
Charge-offs	0
Recoveries	0
Provision (credit) for loan and lease losses	46	27
Balance	472	56
Individually evaluated for impairment
Collectively evaluated for impairment			472	426
Total	$ 472	$ 56	472	426
Individually evaluated for impairment
Financing Receivable, Collectively Evaluated for Impairment
Total

Amount of recovery of loans and lease receivables which had previously been fully or partially written-off as bad debts.

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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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Amount of expense related to estimated loss from loan and lease transactions.

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