Note 5 - Loans (Details) - Loans Secured by Commercial Real Estate by Category (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013	Jun. 30, 2013
Secured by:
Total commercial real estate loans (in Dollars)	$ 753,049	$ 767,513	$ 741,355
Percentage of gross loans	100.00%	100.00%
Development Commercial Real Estate Loans [Member] | Land Unimproved [Member]
Secured by:
Total commercial real estate loans (in Dollars)	16,314
Percentage of gross loans	2.10%
Percentage of Bank's total regulatory capital	11.80%
Development Commercial Real Estate Loans [Member] | Land Development Commercial [Member]
Secured by:
Total commercial real estate loans (in Dollars)	7,288
Percentage of gross loans	1.00%
Percentage of Bank's total regulatory capital	5.30%
Development Commercial Real Estate Loans [Member] | Land Development Residential [Member]
Secured by:
Total commercial real estate loans (in Dollars)	7,958
Percentage of gross loans	1.00%
Percentage of Bank's total regulatory capital	5.80%
Development Commercial Real Estate Loans [Member] | Commercial Construction Retail [Member]
Secured by:
Total commercial real estate loans (in Dollars)	2,238
Percentage of gross loans	0.30%
Percentage of Bank's total regulatory capital	1.60%
Development Commercial Real Estate Loans [Member] | Office Loan [Member]
Secured by:
Total commercial real estate loans (in Dollars)	5,840
Percentage of gross loans	0.80%
Percentage of Bank's total regulatory capital	4.20%
Development Commercial Real Estate Loans [Member] | Multi Family [Member]
Secured by:
Total commercial real estate loans (in Dollars)	8,900
Percentage of gross loans	1.20%
Percentage of Bank's total regulatory capital	6.50%
Development Commercial Real Estate Loans [Member] | Industrial And Warehouse [Member]
Secured by:
Total commercial real estate loans (in Dollars)	659
Percentage of gross loans	0.10%
Percentage of Bank's total regulatory capital	0.50%
Development Commercial Real Estate Loans [Member] | Miscellaneous Commercial [Member]
Secured by:
Total commercial real estate loans (in Dollars)	6,625
Percentage of gross loans	0.90%
Percentage of Bank's total regulatory capital	4.80%
Development Commercial Real Estate Loans [Member]
Secured by:
Total commercial real estate loans (in Dollars)	55,822
Percentage of gross loans	7.40%
Percentage of Bank's total regulatory capital	40.50%
Existing And Other Commercial Real Estate Loans [Member] | Commercial Construction Retail [Member]
Secured by:
Total commercial real estate loans (in Dollars)	26,965
Percentage of gross loans	3.60%
Percentage of Bank's total regulatory capital	19.60%
Existing And Other Commercial Real Estate Loans [Member] | Office Loan [Member]
Secured by:
Total commercial real estate loans (in Dollars)	8,925
Percentage of gross loans	1.20%
Percentage of Bank's total regulatory capital	6.50%
Existing And Other Commercial Real Estate Loans [Member] | Multi Family [Member]
Secured by:
Total commercial real estate loans (in Dollars)	9,294
Percentage of gross loans	1.20%
Percentage of Bank's total regulatory capital	6.80%
Existing And Other Commercial Real Estate Loans [Member] | Industrial And Warehouse [Member]
Secured by:
Total commercial real estate loans (in Dollars)	6,115
Percentage of gross loans	0.80%
Percentage of Bank's total regulatory capital	4.40%
Existing And Other Commercial Real Estate Loans [Member] | Miscellaneous Commercial [Member]
Secured by:
Total commercial real estate loans (in Dollars)	101,940
Percentage of gross loans	13.60%
Percentage of Bank's total regulatory capital	74.00%
Existing And Other Commercial Real Estate Loans [Member] | Hotel/Motel [Member]
Secured by:
Total commercial real estate loans (in Dollars)	53,289
Percentage of gross loans	7.10%
Percentage of Bank's total regulatory capital	38.70%
Existing And Other Commercial Real Estate Loans [Member] | Health Care [Member]
Secured by:
Total commercial real estate loans (in Dollars)	13,555
Percentage of gross loans	1.80%
Percentage of Bank's total regulatory capital	9.80%
Existing And Other Commercial Real Estate Loans [Member] | Residential Construction Speculative [Member]
Secured by:
Total commercial real estate loans (in Dollars)	171
Percentage of Bank's total regulatory capital	0.10%
Existing And Other Commercial Real Estate Loans [Member]
Secured by:
Total commercial real estate loans (in Dollars)	220,254
Percentage of gross loans	29.30%
Percentage of Bank's total regulatory capital	159.90%
Commercial Real Estate Loans [Member] | Commercial Owner Occupied [Member]
Secured by:
Total commercial real estate loans (in Dollars)	149,662
Percentage of gross loans	19.90%
Percentage of Bank's total regulatory capital	108.70%
Commercial Real Estate Loans [Member] | Commercial Construction Owner Occupied [Member]
Secured by:
Total commercial real estate loans (in Dollars)	5,598
Percentage of gross loans	0.70%
Percentage of Bank's total regulatory capital	4.10%
Commercial Real Estate Loans [Member] | Residential Construction Contract [Member]
Secured by:
Total commercial real estate loans (in Dollars)	9,834
Percentage of gross loans	1.30%
Percentage of Bank's total regulatory capital	7.10%
Commercial Real Estate Loans [Member]
Secured by:
Total commercial real estate loans (in Dollars)	165,094
Percentage of gross loans	21.90%
Percentage of Bank's total regulatory capital	119.90%
Commercial Real Estate Portfolio Segment [Member]
Secured by:
Total commercial real estate loans (in Dollars)	$ 441,170
Percentage of gross loans	58.60%
Percentage of Bank's total regulatory capital	320.30%