Note 19 - Condensed Parent Company Financial Information (Detail) - Condensed Balance Sheets (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Assets
Cash and due from banks	$ 9,812	$ 12,529
Other assets	1,614	597
Total assets	370,451	361,175
Liabilities and Stockholders’ Equity
Total liabilities	333,732	328,087
Stockholders’ equity:
Total stockholders’ equity	36,719	33,088	29,656
Total liabilities and stockholders’ equity	370,451	361,175
Parent Company [Member]
Assets
Cash and due from banks	721	2,292
Investment in bank subsidiary	35,853	30,796
Other assets	145
Total assets	36,719	33,088
Liabilities and Stockholders’ Equity
Total liabilities	0	0
Stockholders’ equity:
Total stockholders’ equity	36,719	33,088
Total liabilities and stockholders’ equity	$ 36,719	$ 33,088