Note 5 - Loans - Internal Risk Rating by Loan Class (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Pass [Member] | Commercial Portfolio Segment [Member]
Gross loans	$ 123,230	$ 108,696
Pass [Member] | Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member]
Gross loans	38,480	28,291
Pass [Member] | Commercial Real Estate Portfolio Segment [Member] | Commercial Non-owner Occupied [Member]
Gross loans	248,578	234,177
Pass [Member] | Commercial Real Estate Portfolio Segment [Member] | Commercial Owner Occupied Loan [Member]
Gross loans	143,723	149,327
Pass [Member] | Residential Portfolio Segment [Member] | Real Estate Loan [Member] | Individual Tax Identification Number Loan [Member]
Gross loans	39,567	41,480
Pass [Member] | Residential Portfolio Segment [Member] | Real Estate Loan [Member] | Mortgage Receivable [Member]
Gross loans	8,521	9,041
Pass [Member] | Residential Portfolio Segment [Member] | Home Equity Loan [Member]
Gross loans	40,718	41,149
Pass [Member] | Consumer Portfolio Segment [Member]
Gross loans	54,045	49,551
Pass [Member]
Gross loans	696,862	661,712
Watch [Member] | Commercial Portfolio Segment [Member]
Gross loans	15,760	10,240
Watch [Member] | Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member]
Gross loans	529	28
Watch [Member] | Commercial Real Estate Portfolio Segment [Member] | Commercial Non-owner Occupied [Member]
Gross loans	944	917
Watch [Member] | Commercial Real Estate Portfolio Segment [Member] | Commercial Owner Occupied Loan [Member]
Gross loans	8,821	3,864
Watch [Member] | Residential Portfolio Segment [Member] | Real Estate Loan [Member] | Individual Tax Identification Number Loan [Member]
Gross loans
Watch [Member] | Residential Portfolio Segment [Member] | Real Estate Loan [Member] | Mortgage Receivable [Member]
Gross loans	517
Watch [Member] | Residential Portfolio Segment [Member] | Home Equity Loan [Member]
Gross loans	1,584	1,760
Watch [Member] | Consumer Portfolio Segment [Member]
Gross loans	2
Watch [Member]
Gross loans	28,157	16,809
Special Mention [Member] | Commercial Portfolio Segment [Member]
Gross loans	8,458	9,587
Special Mention [Member] | Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member]
Gross loans
Special Mention [Member] | Commercial Real Estate Portfolio Segment [Member] | Commercial Non-owner Occupied [Member]
Gross loans	1,352	1,588
Special Mention [Member] | Commercial Real Estate Portfolio Segment [Member] | Commercial Owner Occupied Loan [Member]
Gross loans	593	1,687
Special Mention [Member] | Residential Portfolio Segment [Member] | Real Estate Loan [Member] | Individual Tax Identification Number Loan [Member]
Gross loans
Special Mention [Member] | Residential Portfolio Segment [Member] | Real Estate Loan [Member] | Mortgage Receivable [Member]
Gross loans		575
Special Mention [Member] | Residential Portfolio Segment [Member] | Home Equity Loan [Member]
Gross loans	40	1,682
Special Mention [Member] | Consumer Portfolio Segment [Member]
Gross loans		256
Special Mention [Member]
Gross loans	10,443	15,375
Substandard [Member] | Commercial Portfolio Segment [Member]
Gross loans	2,962	4,282
Substandard [Member] | Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member]
Gross loans
Substandard [Member] | Commercial Real Estate Portfolio Segment [Member] | Commercial Non-owner Occupied [Member]
Gross loans	2,999	6,692
Substandard [Member] | Commercial Real Estate Portfolio Segment [Member] | Commercial Owner Occupied Loan [Member]
Gross loans	1,343	1,421
Substandard [Member] | Residential Portfolio Segment [Member] | Real Estate Loan [Member] | Individual Tax Identification Number Loan [Member]
Gross loans	7,621	7,626
Substandard [Member] | Residential Portfolio Segment [Member] | Real Estate Loan [Member] | Mortgage Receivable [Member]
Gross loans	1,824	1,774
Substandard [Member] | Residential Portfolio Segment [Member] | Home Equity Loan [Member]
Gross loans	1,629	882
Substandard [Member] | Consumer Portfolio Segment [Member]
Gross loans	300	66
Substandard [Member]
Gross loans	18,678	22,743
Doubtful [Member] | Commercial Portfolio Segment [Member]
Gross loans
Doubtful [Member] | Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member]
Gross loans
Doubtful [Member] | Commercial Real Estate Portfolio Segment [Member] | Commercial Non-owner Occupied [Member]
Gross loans
Doubtful [Member] | Commercial Real Estate Portfolio Segment [Member] | Commercial Owner Occupied Loan [Member]
Gross loans
Doubtful [Member] | Residential Portfolio Segment [Member] | Real Estate Loan [Member] | Individual Tax Identification Number Loan [Member]
Gross loans
Doubtful [Member] | Residential Portfolio Segment [Member] | Real Estate Loan [Member] | Mortgage Receivable [Member]
Gross loans
Doubtful [Member] | Residential Portfolio Segment [Member] | Home Equity Loan [Member]
Gross loans
Doubtful [Member] | Consumer Portfolio Segment [Member]
Gross loans
Doubtful [Member]
Gross loans
Commercial Portfolio Segment [Member]
Gross loans	150,410	132,805
Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member]
Gross loans	39,009	28,319
Commercial Real Estate Portfolio Segment [Member] | Commercial Non-owner Occupied [Member]
Gross loans	253,873	243,374
Commercial Real Estate Portfolio Segment [Member] | Commercial Owner Occupied Loan [Member]
Gross loans	154,480	156,299
Commercial Real Estate Portfolio Segment [Member]
Gross loans	447,362	427,992
Residential Portfolio Segment [Member] | Real Estate Loan [Member] | Individual Tax Identification Number Loan [Member]
Gross loans	47,188	49,106
Residential Portfolio Segment [Member] | Real Estate Loan [Member] | Mortgage Receivable [Member]
Gross loans	10,862	11,390
Residential Portfolio Segment [Member] | Home Equity Loan [Member]
Gross loans	43,971	45,473
Residential Portfolio Segment [Member]
Gross loans	102,021	105,969
Consumer Portfolio Segment [Member]
Gross loans	54,347	49,873
Gross loans	$ 754,140	$ 716,639