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Note 5 - Loans Receivable and Allowance for Loan Losses - Allowance for Loan Losses (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018		Dec. 31, 2017
Balance	$ 6,525	$ 5,944	$ 6,297	$ 4,675
Charge-offs	(5)	(275)	(19)	(288)
Recoveries	35	8	42	2,779
Provisions (credits)	50	545	285	(944)
Balance	6,605	6,222	6,605	6,222
Total allowance for loan losses	6,525	5,944	6,605	6,222	$ 6,605		$ 6,297
Business Activities Loans [Member]
Balance			6,297
Balance	6,605		6,605
Allowance for loan losses: Individually evaluated for impairment					55		253
Allowance for loan losses: Collectively evaluated for impairment					6,550		6,044
Total allowance for loan losses	6,605		6,605		6,605		6,297
Loans receivable, gross: Individually evaluated for impairment					9,327		6,753
PCI loans individually evaluated for impairment					901
Loans receivable, gross: Collectively evaluated for impairment					753,026		712,894
Total loans receivable, gross					763,254	[1]	719,647
Commercial Real Estate Portfolio Segment [Member]
Balance	2,305	2,218	2,212	1,853
Charge-offs	0	0	0	0
Recoveries	24	6	30	8
Provisions (credits)	(566)	(52)	(479)	311
Balance	1,763	2,172	1,763	2,172
Total allowance for loan losses	2,305	2,218	1,763	2,172	1,763		2,212
Commercial Real Estate Portfolio Segment [Member] | Business Activities Loans [Member]
Balance			2,212
Balance	1,763		1,763
Allowance for loan losses: Individually evaluated for impairment					0		0
Allowance for loan losses: Collectively evaluated for impairment					1,763		2,212
Total allowance for loan losses	1,763		1,763		1,763		2,212
Loans receivable, gross: Individually evaluated for impairment					3,989		1,977
PCI loans individually evaluated for impairment
Loans receivable, gross: Collectively evaluated for impairment					272,111		297,948
Total loans receivable, gross					276,100		299,925
Residential Portfolio Segment [Member]
Balance	1,096	1,041	959	534
Charge-offs	(2)	0	(2)	0
Recoveries	11	0	12	0
Provisions (credits)	(240)	4	(104)	511
Balance	865	1,045	865	1,045
Total allowance for loan losses	1,096	1,041	865	1,045	865		959
Residential Portfolio Segment [Member] | Business Activities Loans [Member]
Balance			959
Balance	865		865
Allowance for loan losses: Individually evaluated for impairment					0		0
Allowance for loan losses: Collectively evaluated for impairment					865		959
Total allowance for loan losses	865		865		865		959
Loans receivable, gross: Individually evaluated for impairment					3,521		3,336
PCI loans individually evaluated for impairment
Loans receivable, gross: Collectively evaluated for impairment					151,556		143,041
Total loans receivable, gross					155,077		146,377
Commercial Portfolio Segment [Member]
Balance	1,996	1,453	2,023	740
Charge-offs	0	(265)	0	(265)
Recoveries	0		0	2,769
Provisions (credits)	245	685	218	(1,371)
Balance	2,241	1,873	2,241	1,873
Total allowance for loan losses	1,996	1,453	2,241	1,873	2,241		2,023
Commercial Portfolio Segment [Member] | Business Activities Loans [Member]
Balance			2,023
Balance	2,241		2,241
Allowance for loan losses: Individually evaluated for impairment					48		251
Allowance for loan losses: Collectively evaluated for impairment					2,193		1,772
Total allowance for loan losses	2,241		2,241		2,241		2,023
Loans receivable, gross: Individually evaluated for impairment					1,028		748
PCI loans individually evaluated for impairment					901
Loans receivable, gross: Collectively evaluated for impairment					172,551		130,413
Total loans receivable, gross					174,480		131,161
Consumer Portfolio Segment [Member]
Balance	523	593	568	641
Charge-offs	(3)	(10)	(17)	(23)
Recoveries	0	2	0	2
Provisions (credits)	150	(327)	119	(362)
Balance	670	258	670	258
Total allowance for loan losses	523	593	670	258	670		568
Consumer Portfolio Segment [Member] | Business Activities Loans [Member]
Balance			568
Balance	670		670
Allowance for loan losses: Individually evaluated for impairment					7		2
Allowance for loan losses: Collectively evaluated for impairment					663		566
Total allowance for loan losses	670		670		670		568
Loans receivable, gross: Individually evaluated for impairment					789		692
PCI loans individually evaluated for impairment
Loans receivable, gross: Collectively evaluated for impairment					96,674		87,015
Total loans receivable, gross					97,463		87,707
Construction Portfolio Segment [Member]
Balance	499	490	481	712
Charge-offs	0	0	0	0
Recoveries	0	0	0	0
Provisions (credits)	181	293	199	71
Balance	680	783	680	783
Total allowance for loan losses	499	490	680	783	680		481
Construction Portfolio Segment [Member] | Business Activities Loans [Member]
Balance			481
Balance	680		680
Allowance for loan losses: Individually evaluated for impairment					0		0
Allowance for loan losses: Collectively evaluated for impairment					680		481
Total allowance for loan losses	680		680		680		481
Loans receivable, gross: Individually evaluated for impairment					0		0
PCI loans individually evaluated for impairment
Loans receivable, gross: Collectively evaluated for impairment					45,476		47,619
Total loans receivable, gross					45,476		47,619
Construction to Permanent Portfolio Segment [Member]
Balance	80	73	54	69
Charge-offs	0	0	0	0
Recoveries	0	0	0	0
Provisions (credits)	20	(27)	46	(23)
Balance	100	46	100	46
Total allowance for loan losses	80	73	100	46	100		54
Construction to Permanent Portfolio Segment [Member] | Business Activities Loans [Member]
Balance			54
Balance	100		100
Allowance for loan losses: Individually evaluated for impairment					0		0
Allowance for loan losses: Collectively evaluated for impairment					100		54
Total allowance for loan losses	100		100		100		54
Loans receivable, gross: Individually evaluated for impairment					0		0
PCI loans individually evaluated for impairment
Loans receivable, gross: Collectively evaluated for impairment					14,658		6,858
Total loans receivable, gross					14,658		6,858
Unallocated Financing Receivables [Member]
Balance	26	76		126
Charge-offs	0	0	0	0
Recoveries	0	0	0	0
Provisions (credits)	260	(31)	286	(81)
Balance	286	45	286	45
Total allowance for loan losses	26	$ 76	286	$ 45	286
Unallocated Financing Receivables [Member] | Business Activities Loans [Member]
Balance			0
Balance	286		286
Allowance for loan losses: Individually evaluated for impairment					0		0
Allowance for loan losses: Collectively evaluated for impairment					286		0
Total allowance for loan losses	$ 286		$ 286		286		0
Loans receivable, gross: Individually evaluated for impairment					0		0
PCI loans individually evaluated for impairment
Loans receivable, gross: Collectively evaluated for impairment					0		0
Total loans receivable, gross					$ 0		$ 0
[1] The total loan receivable, gross does not include $21.9 million acquired loans which were all individually evaluated for impairment.

X

- Definition

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

+ References

No definition available.

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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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