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Note 1 - Basis of Presentation and Accounting Policies (Details)
12 Months Ended
Feb. 12, 2016
Dec. 31, 2015
USD ($)
shares
Dec. 31, 2014
USD ($)
shares
Dec. 31, 2013
USD ($)
Note 1 - Basis of Presentation and Accounting Policies (Details) [Line Items]        
Retained Earnings (Accumulated Deficit)   $ 43,691,073 $ 40,868,919 [1]  
Income Tax Expense (Benefit)   1,837,329 1,349,009 [1]  
Other Real Estate, Valuation Adjustments   (195,000) (204,000)  
Amortization of Mortgage Servicing Rights (MSRs)   227,648 213,210  
Mortgage Servicing Rights (MSR) Impairment (Recovery)   0 $ 0  
FHLB ClassB Capital Stock Par Value   $ 100    
FHLB Capital Stock to Assets   0.09%    
Maximum Investment in FHLB Capital Stock   $ 15,000,000    
FHLB Outstanding Advances   4.25%    
FHLB Stock (in Shares) | shares   23,693 6,065  
Goodwill, Impairment Loss   $ 0 $ 0  
Liability for Uncertain Tax Positions, Current   0    
Increase in Unrecognized Tax Benefits is Reasonably Possible   0    
Income Tax Examination, Penalties and Interest Expense   0 0  
Advertising Expense   $ 820,308 667,337  
Number of Operating Segments   1    
Compensated Absences Liability   $ 0    
Restatement Adjustment [Member]        
Note 1 - Basis of Presentation and Accounting Policies (Details) [Line Items]        
Income Tax Expense (Benefit)     217,000  
Subsequent Event [Member]        
Note 1 - Basis of Presentation and Accounting Policies (Details) [Line Items]        
Number of Branch Offices Closed 3      
Interest Rate Swap [Member]        
Note 1 - Basis of Presentation and Accounting Policies (Details) [Line Items]        
Derivative, Amount of Hedged Item     $ 10,000,000  
Derivative, Term of Contract     5 years  
Income Tax Expense Correction [Member] | Restatement Adjustment [Member]        
Note 1 - Basis of Presentation and Accounting Policies (Details) [Line Items]        
Retained Earnings (Accumulated Deficit)     $ 434,000 $ 651,000
Core Deposits [Member]        
Note 1 - Basis of Presentation and Accounting Policies (Details) [Line Items]        
Finite-Lived Intangible Asset, Useful Life   10 years    
Minimum [Member] | Leasehold Improvements and Buildings [Member]        
Note 1 - Basis of Presentation and Accounting Policies (Details) [Line Items]        
Property, Plant and Equipment, Useful Life   10 years    
Minimum [Member] | Furniture and Fixtures [Member]        
Note 1 - Basis of Presentation and Accounting Policies (Details) [Line Items]        
Property, Plant and Equipment, Useful Life   3 years    
Maximum [Member] | Leasehold Improvements and Buildings [Member]        
Note 1 - Basis of Presentation and Accounting Policies (Details) [Line Items]        
Property, Plant and Equipment, Useful Life   40 years    
Maximum [Member] | Furniture and Fixtures [Member]        
Note 1 - Basis of Presentation and Accounting Policies (Details) [Line Items]        
Property, Plant and Equipment, Useful Life   7 years    
[1] revised for prior period restatement