Note 5 - Foreclosed Properties (Detail) - Major Classification of Other Real Estate Owned in Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012	Mar. 31, 2012	Dec. 31, 2011
Construction loans:
Other real estate owned	$ 9,440	$ 8,938	$ 9,207	$ 9,562
Construction Residential [Member]
Construction loans:
Other real estate owned	587	588
Land Acquistion, Development and Commercial [Member]
Construction loans:
Other real estate owned	3,467	3,591
Real Estate Residential [Member]
Construction loans:
Other real estate owned	546	182
Real Estate Commercial [Member]
Construction loans:
Other real estate owned	3,053	2,905
Commercial, Industrial and Agricultural [Member]
Construction loans:
Other real estate owned	1,164	1,164
Equity Lines [Member]
Construction loans:
Other real estate owned	$ 623	$ 508