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Note 1 - Nature of Business and Significant Accounting Policies (Details)
12 Months Ended
May. 13, 2013
Dec. 31, 2015
USD ($)
shares
Dec. 31, 2014
USD ($)
shares
Dec. 31, 2013
USD ($)
shares
Aug. 27, 2012
Aug. 31, 2005
Note 1 - Nature of Business and Significant Accounting Policies (Details) [Line Items]            
Number of Non-Consolidated Subsidiaries Issuing Trust Preferred Securities   6        
Cash Reserve Deposit Required and Made   $ 30,532,000 $ 23,251,000      
Initial Direct Leasing Costs As a Percentage of Cost   5.50%        
Financing Receivable, Lines of Credit Maximum Term   365 days        
Commercial Real Estate Owner Occupied, Percentage   35.00% 37.00%      
Lending Threshold Requiring Additional Loan Review   $ 1,000,000        
Mortgage Loans in Process of Foreclosure, Amount   685,000 $ 170,000      
Real Estate Acquired Through Foreclosure   7,150,658 12,767,636      
Swap Fee Income   $ 1,717,552 $ 154,800 $ 104,560    
Preferred Stock, Shares Authorized (in Shares) | shares   250,000 250,000      
Preferred Stock, Shares Outstanding (in Shares) | shares   0 0      
Allocated Share-based Compensation Expense   $ 941,469 $ 891,619 $ 792,279    
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized   $ 721,916        
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition   2 years 102 days        
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number (in Shares) | shares   405,832 420,429 419,735    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value   $ 6,500,000        
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value   4,600,000        
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value   $ 480,354 $ 173,105 $ 268,920    
Commercial Portfolio Segment [Member]            
Note 1 - Nature of Business and Significant Accounting Policies (Details) [Line Items]            
Financing Receivable, Term Loans, Generally Maximum Term   7 years        
Commercial Real Estate Portfolio Segment [Member] | Other Non Owner-occupied Commercial Real Estate Loans [Member]            
Note 1 - Nature of Business and Significant Accounting Policies (Details) [Line Items]            
Loan and Leases Recievable, Lending Limits   300.00%        
Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member]            
Note 1 - Nature of Business and Significant Accounting Policies (Details) [Line Items]            
Loan and Leases Recievable, Lending Limits   100.00%        
Residential Portfolio Segment [Member]            
Note 1 - Nature of Business and Significant Accounting Policies (Details) [Line Items]            
Real Estate Acquired Through Foreclosure   $ 471,000 54,000      
In The Money Options [Member]            
Note 1 - Nature of Business and Significant Accounting Policies (Details) [Line Items]            
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number (in Shares) | shares   623,176        
Community National Bancorporation and Community National Bank [Member]            
Note 1 - Nature of Business and Significant Accounting Policies (Details) [Line Items]            
Number of Subsidiaries Assumed Through Business Acquisition 2          
Business Acquisition, Percentage of Voting Interests Acquired 100.00%          
M2 Lease Funds LLC [Member]            
Note 1 - Nature of Business and Significant Accounting Policies (Details) [Line Items]            
Business Acquisition, Percentage of Voting Interests Acquired         20.00% 80.00%
Other Assets [Member]            
Note 1 - Nature of Business and Significant Accounting Policies (Details) [Line Items]            
Other Repossessed Assets   $ 246,612 $ 154,528      
Ruhl Mortgage [Member]            
Note 1 - Nature of Business and Significant Accounting Policies (Details) [Line Items]            
Equity Method Investment, Ownership Percentage   20.00%        
Subsidiaries [Member] | Fixed Rate Residential Mortgage [Member]            
Note 1 - Nature of Business and Significant Accounting Policies (Details) [Line Items]            
Financing Receivable, Term   15 years        
Core Deposits [Member]            
Note 1 - Nature of Business and Significant Accounting Policies (Details) [Line Items]            
Finite-Lived Intangible Asset, Useful Life   10 years        
Core Deposits [Member] | Community National Bancorporation and Community National Bank [Member]            
Note 1 - Nature of Business and Significant Accounting Policies (Details) [Line Items]            
Finite-Lived Intangible Asset, Useful Life 10 years          
Minimum [Member]            
Note 1 - Nature of Business and Significant Accounting Policies (Details) [Line Items]            
Residual Value Percent of Cost   3.00%        
Minimum [Member] | Commercial Portfolio Segment [Member] | Term Loan [Member]            
Note 1 - Nature of Business and Significant Accounting Policies (Details) [Line Items]            
Financing Receivable, Term   3 years        
Minimum [Member] | Subsidiaries [Member] | Adjustable Rate Residential Mortgage [Member]            
Note 1 - Nature of Business and Significant Accounting Policies (Details) [Line Items]            
Financing Receivable, Term   1 year        
Maximum [Member]            
Note 1 - Nature of Business and Significant Accounting Policies (Details) [Line Items]            
Residual Value Percent of Cost   25.00%        
Maximum [Member] | Commercial Portfolio Segment [Member] | Term Loan [Member]            
Note 1 - Nature of Business and Significant Accounting Policies (Details) [Line Items]            
Financing Receivable, Term   5 years        
Maximum [Member] | Special Mention [Member]            
Note 1 - Nature of Business and Significant Accounting Policies (Details) [Line Items]            
Financing Receivable, Credit Weaknesses Borrowers, Term   1 year        
Maximum [Member] | Subsidiaries [Member] | Adjustable Rate Residential Mortgage [Member]            
Note 1 - Nature of Business and Significant Accounting Policies (Details) [Line Items]            
Financing Receivable, Term   5 years