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Note 2 - Summary of Significant Accounting Policies (Details Textual) - USD ($)
9 Months Ended
Apr. 29, 2014
Sep. 30, 2016
Sep. 30, 2015
The 2005 Plan [Member] | Minimum [Member]      
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period   1 year  
The 2005 Plan [Member] | Maximum [Member]      
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period   4 years  
The 2005 Plan [Member]      
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant   1,500,000  
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period   10 years  
The 2014 Republic First Bancorp, Inc. Equity Incentive Plan [Member]      
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant   4,000,000  
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized 2,600,000    
Minimum Percentage of Outstanding Shares as Annual Adjustment 10.00%    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross   653,250  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value, Amount   $ 1,174,320  
Stock Options and Restricted Stock Plan [Member] | Minimum [Member]      
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period   1 year  
Stock Options and Restricted Stock Plan [Member] | Maximum [Member]      
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period   4 years  
Stock Options and Restricted Stock Plan [Member]      
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period   10 years  
Minimum [Member]      
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate, Term   5 years 182 days  
Treasury Bond Term On Which Risk Free Interest Rate is Based   5 years  
Maximum [Member]      
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate, Term   7 years  
Treasury Bond Term On Which Risk Free Interest Rate is Based   7 years  
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate [1]   0.00% 0.00%
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested, Number of Shares   487,550 349,062
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number   2,480,550  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value   $ 1,652,149  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number   1,164,074  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value   $ 1,081,116  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period   80,375 500
Proceeds from Stock Options Exercised   $ 226,271 $ 1,345
Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures in Period   38,550 16,369
Share-based Compensation Arrangement by Share-based Payment Award, Options, Options Forfeited, Weighted Average Grant Date Fair Value, Amount   $ 55,920 $ 21,331
Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Stock Options   $ 1,284,071 $ 1,034,337
[1] A dividend yield of 0.0% is utilized because cash dividends have never been paid.