Note 5 - Loans (Details) - Loans Secured by Commercial Real Estate by Category (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Secured by:
Total commercial real estate loans (in Dollars)	$ 767,513	$ 738,282
Land Unimproved [Member] | Development Commercial Real Estate Loans [Member]
Secured by:
Total commercial real estate loans (in Dollars)	19,636
Percentage of gross loans	2.60%
Percentage of Bank's total regulatory capital	15.10%
Land Development Commercial [Member] | Development Commercial Real Estate Loans [Member]
Secured by:
Total commercial real estate loans (in Dollars)	7,632
Percentage of gross loans	1.00%
Percentage of Bank's total regulatory capital	5.90%
Land Development Residential [Member] | Development Commercial Real Estate Loans [Member]
Secured by:
Total commercial real estate loans (in Dollars)	8,047
Percentage of gross loans	1.00%
Percentage of Bank's total regulatory capital	6.20%
Commercial Construction Retail [Member] | Development Commercial Real Estate Loans [Member]
Secured by:
Total commercial real estate loans (in Dollars)	1,702
Percentage of gross loans	0.20%
Percentage of Bank's total regulatory capital	1.30%
Commercial Construction Retail [Member] | Existing And Other Commercial Real Estate Loans [Member]
Secured by:
Total commercial real estate loans (in Dollars)	24,981
Percentage of gross loans	3.20%
Percentage of Bank's total regulatory capital	19.20%
Office Loan [Member] | Development Commercial Real Estate Loans [Member]
Secured by:
Total commercial real estate loans (in Dollars)	5,839
Percentage of gross loans	0.80%
Percentage of Bank's total regulatory capital	4.50%
Office Loan [Member] | Existing And Other Commercial Real Estate Loans [Member]
Secured by:
Total commercial real estate loans (in Dollars)	13,031
Percentage of gross loans	1.70%
Percentage of Bank's total regulatory capital	10.00%
Multi Family [Member] | Development Commercial Real Estate Loans [Member]
Secured by:
Total commercial real estate loans (in Dollars)	8,430
Percentage of gross loans	1.10%
Percentage of Bank's total regulatory capital	6.50%
Multi Family [Member] | Existing And Other Commercial Real Estate Loans [Member]
Secured by:
Total commercial real estate loans (in Dollars)	10,417
Percentage of gross loans	1.40%
Percentage of Bank's total regulatory capital	8.00%
Industrial And Warehouse [Member] | Development Commercial Real Estate Loans [Member]
Secured by:
Total commercial real estate loans (in Dollars)	614
Percentage of gross loans	0.10%
Percentage of Bank's total regulatory capital	0.50%
Industrial And Warehouse [Member] | Existing And Other Commercial Real Estate Loans [Member]
Secured by:
Total commercial real estate loans (in Dollars)	7,770
Percentage of gross loans	1.00%
Percentage of Bank's total regulatory capital	6.00%
Miscellaneous Commercial [Member] | Development Commercial Real Estate Loans [Member]
Secured by:
Total commercial real estate loans (in Dollars)	7,739
Percentage of gross loans	1.00%
Percentage of Bank's total regulatory capital	5.90%
Miscellaneous Commercial [Member] | Existing And Other Commercial Real Estate Loans [Member]
Secured by:
Total commercial real estate loans (in Dollars)	111,129
Percentage of gross loans	14.50%
Percentage of Bank's total regulatory capital	85.50%
Hotel/Motel [Member] | Existing And Other Commercial Real Estate Loans [Member]
Secured by:
Total commercial real estate loans (in Dollars)	54,439
Percentage of gross loans	7.10%
Percentage of Bank's total regulatory capital	41.90%
Health Care [Member] | Existing And Other Commercial Real Estate Loans [Member]
Secured by:
Total commercial real estate loans (in Dollars)	13,901
Percentage of gross loans	1.80%
Percentage of Bank's total regulatory capital	10.70%
Real Estate Construction - Speculative [Member] | Existing And Other Commercial Real Estate Loans [Member]
Secured by:
Total commercial real estate loans (in Dollars)	162
Percentage of Bank's total regulatory capital	0.20%
Commercial Owner Occupied [Member] | Commercial Real Estate Loans [Member]
Secured by:
Total commercial real estate loans (in Dollars)	143,226
Percentage of gross loans	18.60%
Percentage of Bank's total regulatory capital	110.20%
Commercial Construction Owner Occupied [Member] | Commercial Real Estate Loans [Member]
Secured by:
Total commercial real estate loans (in Dollars)	8,929
Percentage of gross loans	1.20%
Percentage of Bank's total regulatory capital	6.90%
Residential Construction Contract [Member] | Commercial Real Estate Loans [Member]
Secured by:
Total commercial real estate loans (in Dollars)	7,828
Percentage of gross loans	1.00%
Percentage of Bank's total regulatory capital	6.00%
Commercial Real Estate Portfolio Segment [Member]
Secured by:
Total commercial real estate loans (in Dollars)	455,452
Percentage of gross loans	59.30%
Percentage of Bank's total regulatory capital	350.50%
Development Commercial Real Estate Loans [Member]
Secured by:
Total commercial real estate loans (in Dollars)	59,639
Percentage of gross loans	7.80%
Percentage of Bank's total regulatory capital	45.90%
Existing And Other Commercial Real Estate Loans [Member]
Secured by:
Total commercial real estate loans (in Dollars)	235,830
Percentage of gross loans	30.70%
Percentage of Bank's total regulatory capital	181.50%
Commercial Real Estate Loans [Member]
Secured by:
Total commercial real estate loans (in Dollars)	$ 159,983
Percentage of gross loans	20.80%
Percentage of Bank's total regulatory capital	123.10%