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Note 4 - Investment Securities (Details) - Investment Securities Held-to-maturity (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Schedule of Held-to-maturity Securities [Line Items]
State and municipal	$ 146us-gaap_HeldToMaturitySecurities	$ 146us-gaap_HeldToMaturitySecurities
State and municipal	156	162
US States and Political Subdivisions Debt Securities [Member]
Schedule of Held-to-maturity Securities [Line Items]
State and municipal	146	146
State and municipal	10	16
State and municipal	$ 156	$ 162

Amount after other than temporary impairment (OTTI) accretion, of investments in debt securities classified as held-to-maturity.