Note 8 - Fair Value Measurement (Detail) - The Estimated Fair Value of Financial Instruments (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012	Mar. 31, 2012
Financial Assets:
Cash and due from banks	$ 10,063	$ 25,635	$ 67,093
Cash and due from banks	10,063	25,635	67,093
Interest-bearing deposits in other banks	3,210	3,706	3,492
Interest-bearing deposits in other banks	3,210	3,706	3,492
Investment securities	142,918	127,822	128,622
Investment securities	142,918	127,822	128,622
Loans held for sale	1,426	1,548	5,874
Loans held for sale	1,426	1,548	5,874
Loans, net of allowance for loan and lease losses	239,827	239,499	216,534
Loans, net of allowance for loan and lease losses	240,666	244,979	215,233
Federal Home Loan Bank and other stocks	6,868	6,822	3,801
Federal Home Loan Bank and other stocks	6,868	6,822	3,801
Accrued interest receivable	1,238	1,361	1,216
Accrued interest receivable	1,238	1,361	1,216
Financial Liabilities:
Deposits	386,347	387,268	405,280
Deposits	386,619	387,589	405,582
Junior subordinated debt securities	5,632	5,604	5,519
Junior subordinated debt securities	4,611	4,607	4,612
Accrued interest payable	115	111	205
Accrued interest payable	115	111	205
Warrant liability			199
Warrant liability			$ 199