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Note 8 - Loans and Related Allowance for Loan and Lease Losses - Allowance for Loan Losses (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Dec. 31, 2018
Individually evaluated for impairment					$ 706	$ 1,354
Collectively evaluated for impairment					6,295	6,074
Less allowance for loan and lease losses	$ 7,001	$ 7,494	$ 7,001	$ 7,190	7,001	7,428
ALLL balance, period start	7,304	7,502	7,428	7,190
Charge-offs	(438)	(323)	(1,051)	(652)
Recoveries	55	105	194	326
Provision	80	210	430	630
ALLL balance, period end	7,001	7,494	7,001	7,494
Commercial And Industrial [Member]
Individually evaluated for impairment					3	667
Collectively evaluated for impairment					386	302
Less allowance for loan and lease losses	389	1,156	389	999	389	969
ALLL balance, period start	539	1,180	969	999
Charge-offs	(38)	(275)	(393)	(284)
Recoveries	16	28	55	167
Provision	(128)	223	(242)	274
ALLL balance, period end	389	1,156	389	1,156
Real Estate Construction Porfolio Segment [Member]
Individually evaluated for impairment
Collectively evaluated for impairment					99	100
Less allowance for loan and lease losses	99	101	99	313	99	100
ALLL balance, period start	90	89	100	313
Charge-offs
Recoveries	11	28	57	46
Provision	(2)	(16)	(58)	(258)
ALLL balance, period end	99	101	99	101
Real Estate Mortgage Portfolio Segment [Member] | Residential Loan [Member]
Individually evaluated for impairment					33	43
Collectively evaluated for impairment					1,640	1,538
Less allowance for loan and lease losses	1,673	1,705	1,673	1,760	1,673	1,581
ALLL balance, period start	1,681	1,743	1,581	1,760
Charge-offs	(378)	(45)	(517)	(119)
Recoveries	26	47	72	76
Provision	344	(40)	537	(12)
ALLL balance, period end	1,673	1,705	1,673	1,705
Real Estate Mortgage Portfolio Segment [Member] | Commercial Loans [Member]
Individually evaluated for impairment					670	643
Collectively evaluated for impairment					4,046	4,008
Less allowance for loan and lease losses	4,716	4,408	4,716	4,036	4,716	4,651
ALLL balance, period start	4,875	4,361	4,651	4,036
Charge-offs			(31)	(111)
Recoveries	1		3
Provision	(160)	47	93	483
ALLL balance, period end	4,716	4,408	4,716	4,408
Consumer Portfolio Segment [Member]
Individually evaluated for impairment						1
Collectively evaluated for impairment					124	126
Less allowance for loan and lease losses	124	124	124	82	$ 124	$ 127
ALLL balance, period start	119	129	127	82
Charge-offs	(22)	(3)	(110)	(138)
Recoveries	1	2	7	37
Provision	26	(4)	100	143
ALLL balance, period end	$ 124	$ 124	$ 124	$ 124

X

- Definition

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

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
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- Definition

Amount of loans and leases that have been written off from both loan receivables and allowance reserve for credit loss.

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- Definition

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

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Amount of valuation allowance for financing receivables that are expected to be uncollectible that were individually evaluated for impairment.

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- Definition

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.

+ References

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Amount of expense related loan transactions, lease transactions, credit loss from transactions other than loan and lease transactions, and other loss based on assessment of uncollectability from the counterparty to reduce the account to their net realizable value.

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