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Note 3 - Investment Securities (Details)
1 Months Ended 3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2014
USD ($)
shares
Dec. 31, 2013
shares
Jun. 30, 2015
USD ($)
Jun. 30, 2014
USD ($)
Jun. 30, 2015
USD ($)
Jun. 30, 2014
USD ($)
Dec. 31, 2014
USD ($)
Dec. 31, 2013
USD ($)
shares
Note 3 - Investment Securities (Details) [Line Items]                
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions     67   67   51  
Available-for-sale, Securities in Unrealized Loss Positions, Depreciation from Amortized Cost, Percentage     1.10%   1.10%   1.00%  
Proceeds from Sale and Maturity of Marketable Securities     $ 0   $ 0      
Equity Method Investment Number Of Common Shares Acquired (in Shares) | shares 31,750 100,000           100,000
Percentage Of Outstanding Shares Of Voting Common Stock 9.00%     9.00%   9.00%    
Cost Method Investments $ 711,000     $ 711,000   $ 711,000    
Other Assets [Member]                
Note 3 - Investment Securities (Details) [Line Items]                
Cost Method Investments $ 711,000     711,000   711,000    
Municipal Notes [Member]                
Note 3 - Investment Securities (Details) [Line Items]                
Available-for-sale Securities, Gross Realized Gains       $ 54,000   $ 54,000 $ 98,000 $ 22,000
Available-for-sale Securities, Gross Realized Losses             31,000  
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]                
Note 3 - Investment Securities (Details) [Line Items]                
Available-for-sale Securities, Gross Realized Gains             7,000 $ 7,000
Available-for-sale Securities, Gross Realized Losses             3,000  
Mutual Funds [Member]                
Note 3 - Investment Securities (Details) [Line Items]                
Available-for-sale Securities, Gross Realized Losses             $ 17,000