Quarterly report pursuant to Section 13 or 15(d)

Note 6 - Employee and Director Benefits (Details Textual)

v3.7.0.1
Note 6 - Employee and Director Benefits (Details Textual) - USD ($)
3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Share-based Compensation $ 337,000 $ 343,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value $ 11.91 $ 5.77
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized $ 2,539,000  
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition 3 years 36 days  
Restricted Stock [Member]    
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized $ 448,000  
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition 1 year 182 days  
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures 483,276  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period 364,500  
Maximum [Member]    
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period 10 years  
The 2005 Plan [Member]    
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized 6,150,000  
The 2009 Plan [Member]    
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized 5,550,000