Note 9 - Allowance for Loan Losses and Credit Quality Information (Details) - Classified and Unclassified Loans - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	$ 441,027	$ 373,556
Classified [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	32,930	35,806
Classified [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	8,050	11,954
Classified [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	24,462	23,329
Classified [Member] | Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	158	262
Classified [Member] | Unlikely to be Collected Financing Receivable [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	260	261
Unclassified [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	408,097	337,750
1-4 Family Porfolio Segment[Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	82,227	69,841
1-4 Family Porfolio Segment[Member] | Classified [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	2,802	2,700
1-4 Family Porfolio Segment[Member] | Classified [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	191	0
1-4 Family Porfolio Segment[Member] | Classified [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	2,556	2,493
1-4 Family Porfolio Segment[Member] | Classified [Member] | Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	55	207
1-4 Family Porfolio Segment[Member] | Classified [Member] | Unlikely to be Collected Financing Receivable [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	0	0
1-4 Family Porfolio Segment[Member] | Unclassified [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	79,425	67,141
Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	236,119	191,668
Commercial Real Estate Portfolio Segment [Member] | Residential Developments [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	29,074	19,960
Commercial Real Estate Portfolio Segment [Member] | Commercial Real Estate Other [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	207,045	171,708
Commercial Real Estate Portfolio Segment [Member] | Classified [Member] | Residential Developments [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	6,842	10,283
Commercial Real Estate Portfolio Segment [Member] | Classified [Member] | Residential Developments [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	0	323
Commercial Real Estate Portfolio Segment [Member] | Classified [Member] | Residential Developments [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	6,842	9,960
Commercial Real Estate Portfolio Segment [Member] | Classified [Member] | Residential Developments [Member] | Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	0	0
Commercial Real Estate Portfolio Segment [Member] | Classified [Member] | Residential Developments [Member] | Unlikely to be Collected Financing Receivable [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	0	0
Commercial Real Estate Portfolio Segment [Member] | Classified [Member] | Commercial Real Estate Other [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	15,902	16,168
Commercial Real Estate Portfolio Segment [Member] | Classified [Member] | Commercial Real Estate Other [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	3,158	7,376
Commercial Real Estate Portfolio Segment [Member] | Classified [Member] | Commercial Real Estate Other [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	12,744	8,792
Commercial Real Estate Portfolio Segment [Member] | Classified [Member] | Commercial Real Estate Other [Member] | Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	0	0
Commercial Real Estate Portfolio Segment [Member] | Classified [Member] | Commercial Real Estate Other [Member] | Unlikely to be Collected Financing Receivable [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	0	0
Commercial Real Estate Portfolio Segment [Member] | Unclassified [Member] | Residential Developments [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	22,232	9,677
Commercial Real Estate Portfolio Segment [Member] | Unclassified [Member] | Commercial Real Estate Other [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	191,143	155,540
Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	62,855	54,925
Consumer Portfolio Segment [Member] | Classified [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	917	805
Consumer Portfolio Segment [Member] | Classified [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	0	0
Consumer Portfolio Segment [Member] | Classified [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	568	489
Consumer Portfolio Segment [Member] | Classified [Member] | Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	89	55
Consumer Portfolio Segment [Member] | Classified [Member] | Unlikely to be Collected Financing Receivable [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	260	261
Consumer Portfolio Segment [Member] | Unclassified [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	61,938	54,120
Commercial Portfolio Segment [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	59,826	57,122
Commercial Portfolio Segment [Member] | Construction Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	7,210	7,121
Commercial Portfolio Segment [Member] | Commercial Business Other [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	52,616	50,001
Commercial Portfolio Segment [Member] | Construction Industry [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable		7,121
Commercial Portfolio Segment [Member] | Classified [Member] | Construction Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	233
Commercial Portfolio Segment [Member] | Classified [Member] | Construction Loans [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	48
Commercial Portfolio Segment [Member] | Classified [Member] | Construction Loans [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	185
Commercial Portfolio Segment [Member] | Classified [Member] | Construction Loans [Member] | Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	0
Commercial Portfolio Segment [Member] | Classified [Member] | Construction Loans [Member] | Unlikely to be Collected Financing Receivable [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	0
Commercial Portfolio Segment [Member] | Classified [Member] | Commercial Business Other [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	6,234	5,411
Commercial Portfolio Segment [Member] | Classified [Member] | Commercial Business Other [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	4,653	4,255
Commercial Portfolio Segment [Member] | Classified [Member] | Commercial Business Other [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	1,567	1,156
Commercial Portfolio Segment [Member] | Classified [Member] | Commercial Business Other [Member] | Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	14	0
Commercial Portfolio Segment [Member] | Classified [Member] | Commercial Business Other [Member] | Unlikely to be Collected Financing Receivable [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	0	0
Commercial Portfolio Segment [Member] | Classified [Member] | Construction Industry [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable		439
Commercial Portfolio Segment [Member] | Classified [Member] | Construction Industry [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable		0
Commercial Portfolio Segment [Member] | Classified [Member] | Construction Industry [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable		439
Commercial Portfolio Segment [Member] | Classified [Member] | Construction Industry [Member] | Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable		0
Commercial Portfolio Segment [Member] | Classified [Member] | Construction Industry [Member] | Unlikely to be Collected Financing Receivable [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable		0
Commercial Portfolio Segment [Member] | Unclassified [Member] | Construction Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	6,977
Commercial Portfolio Segment [Member] | Unclassified [Member] | Commercial Business Other [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable	$ 46,382	44,590
Commercial Portfolio Segment [Member] | Unclassified [Member] | Construction Industry [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans receivable		$ 6,682