Note 7 - Investment Securities (Details) - Amortized Cost and Estimated Fair Values of Investment Securities Held-to-Maturity (USD $) In Thousands, unless otherwise specified	9 Months Ended	12 Months Ended
	Sep. 30, 2013	Dec. 31, 2012
Note 7 - Investment Securities (Details) - Amortized Cost and Estimated Fair Values of Investment Securities Held-to-Maturity [Line Items]
State and municipal securities	$ 146	$ 146
State and municipal securities	162	166
State and Municipal [Member]
Note 7 - Investment Securities (Details) - Amortized Cost and Estimated Fair Values of Investment Securities Held-to-Maturity [Line Items]
State and municipal securities	146	146
State and municipal securities	16	20
State and municipal securities	$ 162	$ 166