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Note 3 - Investment Securities (Details)
1 Months Ended 3 Months Ended 9 Months Ended
Jun. 30, 2014
USD ($)
shares
Dec. 31, 2013
shares
Sep. 30, 2015
USD ($)
Sep. 30, 2014
USD ($)
Sep. 30, 2015
USD ($)
Sep. 30, 2014
USD ($)
Note 3 - Investment Securities (Details) [Line Items]            
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions     38   38  
Available-for-sale, Securities in Unrealized Loss Positions, Depreciation from Amortized Cost, Percentage     0.80%   0.80%  
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        
Percentage Of Outstanding Shares Of Voting Common Stock 9.00%          
Other Assets [Member]            
Note 3 - Investment Securities (Details) [Line Items]            
Cost Method Investments $ 711,000          
Municipal Notes [Member]            
Note 3 - Investment Securities (Details) [Line Items]            
Available-for-sale Securities, Gross Realized Gains       $ 12,000   $ 66,000
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]            
Note 3 - Investment Securities (Details) [Line Items]            
Available-for-sale Securities, Gross Realized Gains       5,000   5,000
Mutual Funds [Member]            
Note 3 - Investment Securities (Details) [Line Items]            
Available-for-sale Securities, Gross Realized Losses       $ 17,000   $ 17,000