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Note 11 - Deposits (Details) - USD ($)
$ in Millions
Dec. 31, 2015
Dec. 31, 2014
Note 11 - Deposits (Details) [Line Items]    
Time Deposits, $250,000 or More $ 183.0 $ 166.9
Available-for-sale Securities Pledged as Collateral 28.0 19.4
Federal Home Loan Bank [Member]    
Note 11 - Deposits (Details) [Line Items]    
Loans Pledged as Collateral $ 1.0 $ 1.0