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Note 5 - Loans Receivable and Allowance for Loan Losses - Allowance for Loan Losses (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018		Dec. 31, 2017
Balance	$ 6,485	$ 5,697	$ 6,297	$ 4,675
Charge-offs	(13)	(13)	(13)	(13)
Recoveries	3		6	2,771
Provisions (credits)	50	260	235	(1,489)
Balance	6,525	5,944	6,525	5,944
Total allowance for loan losses	6,525	5,697	6,525	5,944	$ 6,525		$ 6,297
Total loans receivable, gross					757,329
Business Activities Loans [Member]
Balance			6,297
Balance	6,525		6,525
Allowance for loan losses: Individually evaluated for impairment					45		253
Allowance for loan losses: Collectively evaluated for impairment					6,480		6,044
Total allowance for loan losses	6,525		6,525		6,525		6,297
Loans receivable, gross: Individually evaluated for impairment					9,390		6,753
Loans receivable, gross: Collectively evaluated for impairment					726,031		712,894
Total loans receivable, gross					735,421	[1]	719,647
Commercial Real Estate Portfolio Segment [Member]
Balance	2,480	2,198	2,212	1,853
Charge-offs	0	0	0	0
Recoveries	3		6	2
Provisions (credits)	(178)	20	(87)	363
Balance	2,305	2,218	2,305	2,218
Total allowance for loan losses	2,480	2,198	2,305	2,218	2,305		2,212
Total loans receivable, gross					305,426
Commercial Real Estate Portfolio Segment [Member] | Business Activities Loans [Member]
Balance			2,212
Balance	2,305		2,305
Allowance for loan losses: Individually evaluated for impairment					0		0
Allowance for loan losses: Collectively evaluated for impairment					2,305		2,212
Total allowance for loan losses	2,305		2,305		2,305		2,212
Loans receivable, gross: Individually evaluated for impairment					4,071		1,977
Loans receivable, gross: Collectively evaluated for impairment					288,437		297,948
Total loans receivable, gross					292,508		299,925
Residential Portfolio Segment [Member]
Balance	1,073	1,073	959	534
Charge-offs	0	0	0	0
Recoveries	0	0	0	0
Provisions (credits)	23	(32)	137	507
Balance	1,096	1,041	1,096	1,041
Total allowance for loan losses	1,073	1,073	1,096	1,041	1,096		959
Total loans receivable, gross					146,754
Residential Portfolio Segment [Member] | Business Activities Loans [Member]
Balance			959
Balance	1,096		1,096
Allowance for loan losses: Individually evaluated for impairment					0		0
Allowance for loan losses: Collectively evaluated for impairment					1,096		959
Total allowance for loan losses	1,096		1,096		1,096		959
Loans receivable, gross: Individually evaluated for impairment					3,524		3,336
Loans receivable, gross: Collectively evaluated for impairment					143,230		143,041
Total loans receivable, gross					146,754		146,377
Commercial Portfolio Segment [Member]
Balance	1,759	1,049	2,023	740
Charge-offs	0	0	0	0
Recoveries	0		0	2,769
Provisions (credits)	237	404	(27)	(2,056)
Balance	1,996	1,453	1,996	1,453
Total allowance for loan losses	1,759	1,049	1,996	1,453	1,996		2,023
Total loans receivable, gross					170,676
Commercial Portfolio Segment [Member] | Business Activities Loans [Member]
Balance			2,023
Balance	1,996		1,996
Allowance for loan losses: Individually evaluated for impairment					45		251
Allowance for loan losses: Collectively evaluated for impairment					1,951		1,772
Total allowance for loan losses	1,996		1,996		1,996		2,023
Loans receivable, gross: Individually evaluated for impairment					1,025		748
Loans receivable, gross: Collectively evaluated for impairment					161,543		130,413
Total loans receivable, gross					162,568		131,161
Consumer Portfolio Segment [Member]
Balance	546	583	568	641
Charge-offs	(13)	(13)	(13)	(13)
Recoveries	0	0	0	0
Provisions (credits)	(10)	23	(32)	(35)
Balance	523	593	523	593
Total allowance for loan losses	546	583	523	593	523		568
Total loans receivable, gross					79,264
Consumer Portfolio Segment [Member] | Business Activities Loans [Member]
Balance			568
Balance	523		523
Allowance for loan losses: Individually evaluated for impairment							2
Allowance for loan losses: Collectively evaluated for impairment					523		566
Total allowance for loan losses	523		523		523		568
Loans receivable, gross: Individually evaluated for impairment					770		692
Loans receivable, gross: Collectively evaluated for impairment					77,612		87,015
Total loans receivable, gross					78,382		87,707
Construction Portfolio Segment [Member]
Balance	488	591	481	712
Charge-offs	0	0	0	0
Recoveries	0	0	0	0
Provisions (credits)	11	(101)	18	(222)
Balance	499	490	499	490
Total allowance for loan losses	488	591	499	490	499		481
Total loans receivable, gross					46,593
Construction Portfolio Segment [Member] | Business Activities Loans [Member]
Balance			481
Balance	499		499
Allowance for loan losses: Individually evaluated for impairment					0		0
Allowance for loan losses: Collectively evaluated for impairment					499		481
Total allowance for loan losses	499		499		499		481
Loans receivable, gross: Individually evaluated for impairment					0		0
Loans receivable, gross: Collectively evaluated for impairment					46,593		47,619
Total loans receivable, gross					46,593		47,619
Construction to Permanent Portfolio Segment [Member]
Balance	61	77	54	69
Charge-offs	0	0	0	0
Recoveries	0	0	0	0
Provisions (credits)	19	(4)	26	4
Balance	80	73	80	73
Total allowance for loan losses	61	77	80	73	80		54
Total loans receivable, gross					8,616
Construction to Permanent Portfolio Segment [Member] | Business Activities Loans [Member]
Balance			54
Balance	80		80
Allowance for loan losses: Individually evaluated for impairment					0		0
Allowance for loan losses: Collectively evaluated for impairment					80		54
Total allowance for loan losses	80		80		80		54
Loans receivable, gross: Individually evaluated for impairment					0		0
Loans receivable, gross: Collectively evaluated for impairment					8,616		6,858
Total loans receivable, gross					8,616		6,858
Unallocated Financing Receivables [Member]
Balance	78	126		126
Charge-offs	0	0	0	0
Recoveries	0	0	0	0
Provisions (credits)	(52)	(50)	26	(50)
Balance	26	76	26	76
Total allowance for loan losses	78	$ 126	26	$ 76	26
Unallocated Financing Receivables [Member] | Business Activities Loans [Member]
Balance			0
Balance	26		26
Allowance for loan losses: Individually evaluated for impairment					0		0
Allowance for loan losses: Collectively evaluated for impairment					26		0
Total allowance for loan losses	$ 26		$ 26		26		0
Loans receivable, gross: Individually evaluated for impairment					0		0
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

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

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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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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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