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Note 5 - Loans and Related Allowance for Loan and Lease Losses - Allowance for Loan Losses (Details) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2018	Dec. 31, 2017
Individually evaluated for impairment			$ 1,354,000	$ 1,567,000
Collectively evaluated for impairment			6,074,000	5,623,000
Total ending allowance balance	$ 7,428,000	$ 7,190,000	7,428,000	7,190,000
ALLL balance, period start	7,190,000	6,598,000
Charge-offs	(1,118,000)	(1,154,000)
Recoveries	516,000	701,000
Provision	840,000	1,045,000
ALLL balance, period end	7,428,000	7,190,000
Commercial And Industrial [Member]
Individually evaluated for impairment			667,000	694,000
Collectively evaluated for impairment			302,000	305,000
Total ending allowance balance	969,000	999,000	969,000	999,000
ALLL balance, period start	999,000	448,000
Charge-offs	(610,000)	(536,000)
Recoveries	287,000	234,000
Provision	293,000	853,000
ALLL balance, period end	969,000	999,000
Real Estate Construction Porfolio Segment [Member]
Individually evaluated for impairment
Collectively evaluated for impairment			100,000	313,000
Total ending allowance balance	100,000	313,000	100,000	313,000
ALLL balance, period start	313,000	172,000
Charge-offs	0
Recoveries	63,000	34,000
Provision	(276,000)	107,000
ALLL balance, period end	100,000	313,000
Real Estate Mortgage Portfolio Segment [Member] | Residential Loan [Member]
Individually evaluated for impairment			43,000	140,000
Collectively evaluated for impairment			1,538,000	1,620,000
Total ending allowance balance	1,581,000	1,760,000	1,581,000	1,760,000
ALLL balance, period start	1,760,000	2,818,000
Charge-offs	(177,000)	(117,000)
Recoveries	128,000	241,000
Provision	(130,000)	(1,182,000)
ALLL balance, period end	1,581,000	1,760,000
Real Estate Mortgage Portfolio Segment [Member] | Commercial Loans [Member]
Individually evaluated for impairment			643,000	733,000
Collectively evaluated for impairment			4,008,000	3,303,000
Total ending allowance balance	4,651,000	4,036,000	4,651,000	4,036,000
ALLL balance, period start	4,036,000	3,135,000
Charge-offs	(111,000)	(39,000)
Recoveries		111,000
Provision	726,000	829,000
ALLL balance, period end	4,651,000	4,036,000
Consumer Portfolio Segment [Member]
Individually evaluated for impairment			1,000
Collectively evaluated for impairment			126,000	82,000
Total ending allowance balance	127,000	82,000	$ 127,000	$ 82,000
ALLL balance, period start	82,000	25,000
Charge-offs	(220,000)	(462,000)
Recoveries	38,000	81,000
Provision	227,000	438,000
ALLL balance, period end	$ 127,000	$ 82,000

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
-Subparagraph (c)(4)
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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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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.

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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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