Note 5 - Loans (Details) - Loans Secured by Commercial Real Estate by Category (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Secured by:
Loans, gross (in Dollars)	$ 805,059	$ 767,513
Percentage of loans, gross	100.00%	100.00%
Development Commercial Real Estate Loans [Member] | Land Unimproved [Member]
Secured by:
Loans, gross (in Dollars)	15,636
Percentage of loans, gross	1.90%
Percentage of Bank's total regulatory capital	10.90%
Development Commercial Real Estate Loans [Member] | Land Development Commercial [Member]
Secured by:
Loans, gross (in Dollars)	5,926
Percentage of loans, gross	0.70%
Percentage of Bank's total regulatory capital	4.20%
Development Commercial Real Estate Loans [Member] | Land Development Residential [Member]
Secured by:
Loans, gross (in Dollars)	5,338
Percentage of loans, gross	0.70%
Percentage of Bank's total regulatory capital	3.70%
Development Commercial Real Estate Loans [Member] | Commercial Construction Retail [Member]
Secured by:
Loans, gross (in Dollars)	3,167
Percentage of loans, gross	0.40%
Percentage of Bank's total regulatory capital	2.20%
Development Commercial Real Estate Loans [Member]
Secured by:
Loans, gross (in Dollars)	30,067
Percentage of loans, gross	3.70%
Percentage of Bank's total regulatory capital	21.00%
Existing And Other Commercial Real Estate Loans [Member] | Commercial Construction Retail [Member]
Secured by:
Loans, gross (in Dollars)	32,703
Percentage of loans, gross	4.10%
Percentage of Bank's total regulatory capital	22.80%
Existing And Other Commercial Real Estate Loans [Member] | Hotel/Motel [Member]
Secured by:
Loans, gross (in Dollars)	40,384
Percentage of loans, gross	5.00%
Percentage of Bank's total regulatory capital	28.20%
Existing And Other Commercial Real Estate Loans [Member] | Office Loan [Member]
Secured by:
Loans, gross (in Dollars)	26,804
Percentage of loans, gross	3.30%
Percentage of Bank's total regulatory capital	18.70%
Existing And Other Commercial Real Estate Loans [Member] | Multi Family [Member]
Secured by:
Loans, gross (in Dollars)	9,025
Percentage of loans, gross	1.10%
Percentage of Bank's total regulatory capital	6.30%
Existing And Other Commercial Real Estate Loans [Member] | Industrial And Warehouse [Member]
Secured by:
Loans, gross (in Dollars)	5,976
Percentage of loans, gross	0.80%
Percentage of Bank's total regulatory capital	4.20%
Existing And Other Commercial Real Estate Loans [Member] | Health Care [Member]
Secured by:
Loans, gross (in Dollars)	13,183
Percentage of loans, gross	1.60%
Percentage of Bank's total regulatory capital	9.20%
Existing And Other Commercial Real Estate Loans [Member] | Miscellaneous Commercial [Member]
Secured by:
Loans, gross (in Dollars)	102,115
Percentage of loans, gross	12.70%
Percentage of Bank's total regulatory capital	71.20%
Existing And Other Commercial Real Estate Loans [Member] | Residential Construction Speculative [Member]
Secured by:
Loans, gross (in Dollars)	299
Percentage of Bank's total regulatory capital	0.20%
Existing And Other Commercial Real Estate Loans [Member]
Secured by:
Loans, gross (in Dollars)	230,489
Percentage of loans, gross	28.60%
Percentage of Bank's total regulatory capital	160.80%
Commercial Real Estate Loans [Member] | Commercial Owner Occupied [Member]
Secured by:
Loans, gross (in Dollars)	151,774
Percentage of loans, gross	18.90%
Percentage of Bank's total regulatory capital	105.90%
Commercial Real Estate Loans [Member] | Commercial Construction Owner Occupied [Member]
Secured by:
Loans, gross (in Dollars)	8,542
Percentage of loans, gross	1.10%
Percentage of Bank's total regulatory capital	5.90%
Commercial Real Estate Loans [Member] | Residential Construction Contract [Member]
Secured by:
Loans, gross (in Dollars)	9,153
Percentage of loans, gross	1.10%
Percentage of Bank's total regulatory capital	6.40%
Commercial Real Estate Loans [Member]
Secured by:
Loans, gross (in Dollars)	169,469
Percentage of loans, gross	21.10%
Percentage of Bank's total regulatory capital	118.20%
Commercial Real Estate Portfolio Segment [Member]
Secured by:
Loans, gross (in Dollars)	$ 430,025	$ 455,452
Percentage of loans, gross	53.40%
Percentage of Bank's total regulatory capital	300.00%