Annual report pursuant to Section 13 and 15(d)

Note 12 - Employee and Director Benefits (Details Textual)

v3.10.0.1
Note 12 - Employee and Director Benefits (Details Textual) - USD ($)
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2014
Mar. 23, 2009
Dec. 31, 2006
Dec. 31, 2005
Share-based Compensation, Total $ 851,000 $ 1,170,000 $ 1,198,000        
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized 3,248,774            
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value $ 12.76 $ 11.82 $ 6        
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition 1 year 255 days            
Postemployment Benefits, Period Expense $ 1,500,000 $ 1,400,000 $ 1,300,000        
Restricted Stock [Member]              
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition 3 years 36 days            
The 2005 Plan [Member]              
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized           6,150,000 3,150,000
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period 10 years            
The 2009 Plan [Member]              
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized       5,550,000 2,550,000