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Note 4 - Loans Receivable and 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
Balance	$ 8,458	$ 6,525	$ 7,609	$ 6,297
Charge-offs	(282)	(5)	(2,589)	(19)
Recoveries	129	35	183	42
Provisions (credits)	100	50	3,202	285
Balance	8,405	6,605	8,405	6,605
Total allowance for loan losses	8,458	6,525	8,405	6,605	$ 8,405		$ 7,609
Business Activities Loans [Member]
Balance			7,609
Balance	8,405		8,405
Allowance for loan losses: Individually evaluated for impairment							1,545
Allowance for loan losses: Collectively evaluated for impairment					8,405		6,064
Total allowance for loan losses	8,405		8,405		8,405		7,609
Loans receivable, gross: Individually evaluated for impairment					20,767		21,218
PCI loans individually evaluated for impairment					182		615
Loans receivable, gross: Collectively evaluated for impairment					779,365		758,543
Total loans receivable, gross					800,314	[1]	780,376
Commercial Real Estate Portfolio Segment [Member]
Balance	1,978	2,305	1,866	2,212
Charge-offs	0	0	0	0
Recoveries		24	2	30
Provisions (credits)	111	(566)	221	(479)
Balance	2,089	1,763	2,089	1,763
Total allowance for loan losses	1,978	2,305	2,089	1,763	2,089		1,866
Commercial Real Estate Portfolio Segment [Member] | Business Activities Loans [Member]
Balance			1,866
Balance	2,089		2,089
Allowance for loan losses: Individually evaluated for impairment					0		0
Allowance for loan losses: Collectively evaluated for impairment					2,089		1,866
Total allowance for loan losses	2,089		2,089		2,089		1,866
Loans receivable, gross: Individually evaluated for impairment					13,989		4,606
PCI loans individually evaluated for impairment
Loans receivable, gross: Collectively evaluated for impairment					285,616		270,332
Total loans receivable, gross					299,605		274,938
Residential Portfolio Segment [Member]
Balance	936	1,096	1,059	959
Charge-offs	(105)	(2)	(117)	(2)
Recoveries	9	11	9	12
Provisions (credits)	125	(240)	14	(104)
Balance	965	865	965	865
Total allowance for loan losses	936	1,096	965	865	965		1,059
Residential Portfolio Segment [Member] | Business Activities Loans [Member]
Balance			1,059
Balance	965		965
Allowance for loan losses: Individually evaluated for impairment							216
Allowance for loan losses: Collectively evaluated for impairment					965		843
Total allowance for loan losses	965		965		965		1,059
Loans receivable, gross: Individually evaluated for impairment					3,640		2,302
PCI loans individually evaluated for impairment
Loans receivable, gross: Collectively evaluated for impairment					159,906		154,998
Total loans receivable, gross					163,546		157,300
Commercial Portfolio Segment [Member]
Balance	4,208	1,996	3,558	2,023
Charge-offs	(74)		(2,366)
Recoveries	117		164
Provisions (credits)	104	245	2,999	218
Balance	4,355	2,241	4,355	2,241
Total allowance for loan losses	4,208	1,996	4,355	2,241	4,355		3,558
Commercial Portfolio Segment [Member] | Business Activities Loans [Member]
Balance			3,558
Balance	4,355		4,355
Allowance for loan losses: Individually evaluated for impairment							1,299
Allowance for loan losses: Collectively evaluated for impairment					4,355		2,259
Total allowance for loan losses	4,355		4,355		4,355		3,558
Loans receivable, gross: Individually evaluated for impairment					2,222		4,646
PCI loans individually evaluated for impairment					182
Loans receivable, gross: Collectively evaluated for impairment					184,391		186,591
Total loans receivable, gross					186,795		191,852
Consumer Portfolio Segment [Member]
Balance	664	523	641	568
Charge-offs	(103)	(3)	(106)	(17)
Recoveries	3		8
Provisions (credits)	(196)	150	(175)	119
Balance	368	670	368	670
Total allowance for loan losses	664	523	368	670	368		641
Consumer Portfolio Segment [Member] | Business Activities Loans [Member]
Balance			641
Balance	368		368
Allowance for loan losses: Individually evaluated for impairment							30
Allowance for loan losses: Collectively evaluated for impairment					368		611
Total allowance for loan losses	368		368		368		641
Loans receivable, gross: Individually evaluated for impairment					916		864
PCI loans individually evaluated for impairment
Loans receivable, gross: Collectively evaluated for impairment					92,551		93,705
Total loans receivable, gross					93,467		94,569
Construction Portfolio Segment [Member]
Balance	467	499	350	481
Charge-offs	0	0	0	0
Recoveries	0	0	0	0
Provisions (credits)	(19)	181	98	199
Balance	448	680	448	680
Total allowance for loan losses	467	499	448	680	448		350
Construction Portfolio Segment [Member] | Business Activities Loans [Member]
Balance			350
Balance	448		448
Allowance for loan losses: Individually evaluated for impairment					0		0
Allowance for loan losses: Collectively evaluated for impairment					448		350
Total allowance for loan losses	448		448		448		350
Loans receivable, gross: Individually evaluated for impairment							8,800
PCI loans individually evaluated for impairment
Loans receivable, gross: Collectively evaluated for impairment					44,349		37,240
Total loans receivable, gross					44,349		46,040
Construction to Permanent Portfolio Segment [Member]
Balance	105	80	108	54
Charge-offs	0	0	0	0
Recoveries	0	0	0	0
Provisions (credits)	10	20	7	46
Balance	115	100	115	100
Total allowance for loan losses	105	80	115	100	115		108
Construction to Permanent Portfolio Segment [Member] | Business Activities Loans [Member]
Balance			108
Balance	115		115
Allowance for loan losses: Individually evaluated for impairment					0		0
Allowance for loan losses: Collectively evaluated for impairment					115		108
Total allowance for loan losses	115		115		115		108
Loans receivable, gross: Individually evaluated for impairment					0		0
PCI loans individually evaluated for impairment
Loans receivable, gross: Collectively evaluated for impairment					12,552		15,677
Total loans receivable, gross					12,552		15,677
Unallocated Financing Receivables [Member]
Balance	100	26	27
Charge-offs	0	0	0	0
Recoveries	0	0	0	0
Provisions (credits)	(35)	260	38	286
Balance	65	286	65	286
Total allowance for loan losses	100	$ 26	65	$ 286	65		27
Unallocated Financing Receivables [Member] | Business Activities Loans [Member]
Balance			27
Balance	65		65
Allowance for loan losses: Individually evaluated for impairment					0		0
Allowance for loan losses: Collectively evaluated for impairment					65		27
Total allowance for loan losses	$ 65		$ 65		65		27
Loans receivable, gross: Individually evaluated for impairment					0		0
PCI loans individually evaluated for impairment
Loans receivable, gross: Collectively evaluated for impairment							0
Total loans receivable, gross							0
Commercial and Industrial Portfolio Segment [Member] | Business Activities Loans [Member]
PCI loans individually evaluated for impairment							$ 615
[1]

X

- Definition

The amount of acquired loans that were individually evaluated for impairment.

+ References

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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 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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