Note 10 - Derivative Financial Instruments (Details) - Interest Rate Derivatives Portfolio (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2013		Dec. 31, 2012
Interest Rate Derivatives Portfolio [Abstract]
Notional amount outstanding	$ 15,300		$ 15,860
Derivative liability fair value	(1,730)		(2,270)
Weighted-average interest rate received	2.11%		2.12%
Weighted-average interest rate paid	6.39%		6.39%
Weighted-average maturity (in years)	4.27		4.76
Cash pledged to collateralize net unrealized losses with counterparties (1)	1,863	[1]	2,516	[1]
Fair value of assets needed to settle derivative transactions (2)	$ 1,759	[2]	$ 2,301	[2]

[1] No other collateral was required to be pledged.

[2] This amount represents the fair value if credit risk related contingent factors were triggered.