Note 5 - Loans (Details) - Internal Risk Rating by Loan Class - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Note 5 - Loans (Details) - Internal Risk Rating by Loan Class [Line Items]
Gross loans	$ 724,243	$ 716,639
Pass [Member]
Note 5 - Loans (Details) - Internal Risk Rating by Loan Class [Line Items]
Gross loans	669,724	661,712
Watch [Member]
Note 5 - Loans (Details) - Internal Risk Rating by Loan Class [Line Items]
Gross loans	22,323	16,809
Special Mention [Member]
Note 5 - Loans (Details) - Internal Risk Rating by Loan Class [Line Items]
Gross loans	13,082	15,375
Substandard [Member]
Note 5 - Loans (Details) - Internal Risk Rating by Loan Class [Line Items]
Gross loans	19,114	22,743
Commercial Portfolio Segment [Member]
Note 5 - Loans (Details) - Internal Risk Rating by Loan Class [Line Items]
Gross loans	136,721	132,805
Commercial Portfolio Segment [Member] | Pass [Member]
Note 5 - Loans (Details) - Internal Risk Rating by Loan Class [Line Items]
Gross loans	110,209	108,696
Commercial Portfolio Segment [Member] | Watch [Member]
Note 5 - Loans (Details) - Internal Risk Rating by Loan Class [Line Items]
Gross loans	13,595	10,240
Commercial Portfolio Segment [Member] | Special Mention [Member]
Note 5 - Loans (Details) - Internal Risk Rating by Loan Class [Line Items]
Gross loans	10,092	9,587
Commercial Portfolio Segment [Member] | Substandard [Member]
Note 5 - Loans (Details) - Internal Risk Rating by Loan Class [Line Items]
Gross loans	2,825	4,282
Commercial Real Estate Portfolio Segment [Member]
Note 5 - Loans (Details) - Internal Risk Rating by Loan Class [Line Items]
Gross loans	429,878	427,992
Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member]
Note 5 - Loans (Details) - Internal Risk Rating by Loan Class [Line Items]
Gross loans	27,554	28,319
Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member] | Pass [Member]
Note 5 - Loans (Details) - Internal Risk Rating by Loan Class [Line Items]
Gross loans	27,136	28,291
Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member] | Watch [Member]
Note 5 - Loans (Details) - Internal Risk Rating by Loan Class [Line Items]
Gross loans	418	28
Commercial Real Estate Portfolio Segment [Member] | Commercial Non-owner Occupied [Member]
Note 5 - Loans (Details) - Internal Risk Rating by Loan Class [Line Items]
Gross loans	247,840	243,374
Commercial Real Estate Portfolio Segment [Member] | Commercial Non-owner Occupied [Member] | Pass [Member]
Note 5 - Loans (Details) - Internal Risk Rating by Loan Class [Line Items]
Gross loans	242,940	234,177
Commercial Real Estate Portfolio Segment [Member] | Commercial Non-owner Occupied [Member] | Watch [Member]
Note 5 - Loans (Details) - Internal Risk Rating by Loan Class [Line Items]
Gross loans	936	917
Commercial Real Estate Portfolio Segment [Member] | Commercial Non-owner Occupied [Member] | Special Mention [Member]
Note 5 - Loans (Details) - Internal Risk Rating by Loan Class [Line Items]
Gross loans	952	1,588
Commercial Real Estate Portfolio Segment [Member] | Commercial Non-owner Occupied [Member] | Substandard [Member]
Note 5 - Loans (Details) - Internal Risk Rating by Loan Class [Line Items]
Gross loans	3,012	6,692
Commercial Real Estate Portfolio Segment [Member] | Commercial Owner Occupied Loan [Member]
Note 5 - Loans (Details) - Internal Risk Rating by Loan Class [Line Items]
Gross loans	154,484	156,299
Commercial Real Estate Portfolio Segment [Member] | Commercial Owner Occupied Loan [Member] | Pass [Member]
Note 5 - Loans (Details) - Internal Risk Rating by Loan Class [Line Items]
Gross loans	146,093	149,327
Commercial Real Estate Portfolio Segment [Member] | Commercial Owner Occupied Loan [Member] | Watch [Member]
Note 5 - Loans (Details) - Internal Risk Rating by Loan Class [Line Items]
Gross loans	5,636	3,864
Commercial Real Estate Portfolio Segment [Member] | Commercial Owner Occupied Loan [Member] | Special Mention [Member]
Note 5 - Loans (Details) - Internal Risk Rating by Loan Class [Line Items]
Gross loans	1,219	1,687
Commercial Real Estate Portfolio Segment [Member] | Commercial Owner Occupied Loan [Member] | Substandard [Member]
Note 5 - Loans (Details) - Internal Risk Rating by Loan Class [Line Items]
Gross loans	1,536	1,421
Residential Portfolio Segment [Member]
Note 5 - Loans (Details) - Internal Risk Rating by Loan Class [Line Items]
Gross loans	103,658	105,969
Residential Portfolio Segment [Member] | Real Estate Loan [Member] | Individual Tax Identification Number Loan [Member]
Note 5 - Loans (Details) - Internal Risk Rating by Loan Class [Line Items]
Gross loans	48,384	49,106
Residential Portfolio Segment [Member] | Real Estate Loan [Member] | Individual Tax Identification Number Loan [Member] | Pass [Member]
Note 5 - Loans (Details) - Internal Risk Rating by Loan Class [Line Items]
Gross loans	40,638	41,480
Residential Portfolio Segment [Member] | Real Estate Loan [Member] | Individual Tax Identification Number Loan [Member] | Substandard [Member]
Note 5 - Loans (Details) - Internal Risk Rating by Loan Class [Line Items]
Gross loans	7,746	7,626
Residential Portfolio Segment [Member] | Real Estate Loan [Member] | Mortgage Receivable [Member]
Note 5 - Loans (Details) - Internal Risk Rating by Loan Class [Line Items]
Gross loans	10,947	11,390
Residential Portfolio Segment [Member] | Real Estate Loan [Member] | Mortgage Receivable [Member] | Pass [Member]
Note 5 - Loans (Details) - Internal Risk Rating by Loan Class [Line Items]
Gross loans	8,630	9,041
Residential Portfolio Segment [Member] | Real Estate Loan [Member] | Mortgage Receivable [Member] | Special Mention [Member]
Note 5 - Loans (Details) - Internal Risk Rating by Loan Class [Line Items]
Gross loans	575	575
Residential Portfolio Segment [Member] | Real Estate Loan [Member] | Mortgage Receivable [Member] | Substandard [Member]
Note 5 - Loans (Details) - Internal Risk Rating by Loan Class [Line Items]
Gross loans	1,742	1,774
Residential Portfolio Segment [Member] | Home Equity Loan [Member]
Note 5 - Loans (Details) - Internal Risk Rating by Loan Class [Line Items]
Gross loans	44,327	45,473
Residential Portfolio Segment [Member] | Home Equity Loan [Member] | Pass [Member]
Note 5 - Loans (Details) - Internal Risk Rating by Loan Class [Line Items]
Gross loans	40,405	41,149
Residential Portfolio Segment [Member] | Home Equity Loan [Member] | Watch [Member]
Note 5 - Loans (Details) - Internal Risk Rating by Loan Class [Line Items]
Gross loans	1,733	1,760
Residential Portfolio Segment [Member] | Home Equity Loan [Member] | Special Mention [Member]
Note 5 - Loans (Details) - Internal Risk Rating by Loan Class [Line Items]
Gross loans		1,682
Residential Portfolio Segment [Member] | Home Equity Loan [Member] | Substandard [Member]
Note 5 - Loans (Details) - Internal Risk Rating by Loan Class [Line Items]
Gross loans	2,189	882
Consumer Portfolio Segment [Member]
Note 5 - Loans (Details) - Internal Risk Rating by Loan Class [Line Items]
Gross loans	53,986	49,873
Consumer Portfolio Segment [Member] | Pass [Member]
Note 5 - Loans (Details) - Internal Risk Rating by Loan Class [Line Items]
Gross loans	53,673	49,551
Consumer Portfolio Segment [Member] | Watch [Member]
Note 5 - Loans (Details) - Internal Risk Rating by Loan Class [Line Items]
Gross loans	5
Consumer Portfolio Segment [Member] | Special Mention [Member]
Note 5 - Loans (Details) - Internal Risk Rating by Loan Class [Line Items]
Gross loans	244	256
Consumer Portfolio Segment [Member] | Substandard [Member]
Note 5 - Loans (Details) - Internal Risk Rating by Loan Class [Line Items]
Gross loans	$ 64	$ 66