Note 7 - Investment Securities (Details) - Amortized Cost and Estimated Fair Value of Securities Held-to-Maturity by Contractual Maturityaturity a (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Amortized Cost and Estimated Fair Value of Securities Held-to-Maturity by Contractual Maturityaturity a [Abstract]
Due after one year through five years	$ 160
Due after one year through five years	146
Total investment securities held-to-maturity	160	162
Total investment securities held-to-maturity	$ 146	$ 146