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Note 5 - Benefit Plans (Details) - USD ($)
1 Months Ended 3 Months Ended 6 Months Ended
Feb. 28, 2015
Feb. 28, 2014
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2015
Jun. 30, 2014
Note 5 - Benefit Plans (Details) [Line Items]            
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value         $ 201,406 $ 116,226
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value     $ 670,810 $ 833,326 670,810 833,326
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value     670,810 713,282 670,810 713,282
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value           $ 258,750
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in Shares)           23,320
Allocated Share-based Compensation Expense     43,580 $ 30,918 208,730  
Allocated Share-based Compensation Expense, Net of Tax           $ 190,490
Director [Member]            
Note 5 - Benefit Plans (Details) [Line Items]            
Restricted Stock or Unit Expense         77  
Officer [Member]            
Note 5 - Benefit Plans (Details) [Line Items]            
Restricted Stock or Unit Expense         85,943 $ 51,322
2010 Equity Plan [Member] | Director [Member]            
Note 5 - Benefit Plans (Details) [Line Items]            
Restricted Stock or Unit Expense $ 122,476 $ 122,538        
Employee Stock Option [Member]            
Note 5 - Benefit Plans (Details) [Line Items]            
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value         $ 138,368  
Restricted Stock [Member]            
Note 5 - Benefit Plans (Details) [Line Items]            
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value (in Dollars per share)         $ 14.78  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in Shares)         28,451  
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized     $ 402,816   $ 402,816  
Restricted Stock [Member] | Officer [Member]            
Note 5 - Benefit Plans (Details) [Line Items]            
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in Shares) 966       19,204  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Cliff Vesting Period 3 years 3 years        
Restricted Stock [Member] | 2010 Equity Plan [Member] | Director [Member]            
Note 5 - Benefit Plans (Details) [Line Items]            
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures (in Shares) 8,281 11,242        
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value (in Dollars per share) $ 14.79 $ 10.90