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Note 9 - FHLB Advances (Details) - USD ($)
3 Months Ended 12 Months Ended
Dec. 31, 2015
Jun. 30, 2015
Dec. 31, 2015
Dec. 31, 2014
Note 9 - FHLB Advances (Details) [Line Items]        
Federal Home Loan Bank Stock $ 9,135,900   $ 9,135,900 $ 11,279,000
Repayments of Federal Home Loan Bank Borrowings $ 3,000,000 $ 75,500,000 $ 84,401,601 0
Federal Home Loan Bank, Advances, Branch of FHLB Bank, Weighted Average Interest Rate 3.98% 4.36% 3.98%  
Gains (Losses) on Extinguishment of Debt $ 209,416 $ (6,900,000)    
Federal Home Loan Bank, Advances, General Debt Obligations, Disclosures, Collateral Pledged 480,466,274   $ 480,466,274 499,084,047
Advances from Federal Home Loan Banks, Short-term $ 84,000,000   $ 84,000,000 $ 37,000,000
Federal Home Loan Bank Advances [Member]        
Note 9 - FHLB Advances (Details) [Line Items]        
Gains (Losses) on Extinguishment of Debt   $ (5,692,185)    
Minimum [Member]        
Note 9 - FHLB Advances (Details) [Line Items]        
Federal Home Loan Bank, Advances, Maturity Period, Fixed Rate     1 day  
Minimum [Member] | Loans Receivable [Member]        
Note 9 - FHLB Advances (Details) [Line Items]        
FHLB Collateral Maintenance Levels 125.00%   125.00%  
Maximum [Member]        
Note 9 - FHLB Advances (Details) [Line Items]        
Federal Home Loan Bank, Advances, Maturity Period, Fixed Rate     1 month  
Maximum [Member] | Loans Receivable [Member]        
Note 9 - FHLB Advances (Details) [Line Items]        
FHLB Collateral Maintenance Levels 333.00%   333.00%