Annual report pursuant to Section 13 and 15(d)

Note 13 - Employee and Director Benefits (Details Textual)

v3.20.4
Note 13 - Employee and Director Benefits (Details Textual) - USD ($)
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2014
Mar. 23, 2009
Share-based Payment Arrangement, Noncash Expense, Total $ 1,332,000 $ 1,100,000 $ 851,000    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross (in shares) 0        
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value (in dollars per share)   $ 12.40 $ 12.76    
Postemployment Benefits, Period Expense $ 2,000,000.0 $ 1,700,000 $ 1,500,000    
Share-based Payment Arrangement, Option [Member]          
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross (in shares)   35,500 42,250    
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount, Total $ 691,000        
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year) 8 months 12 days        
Restricted Stock [Member]          
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount, Total $ 1,700,000        
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year) 2 years 7 months 6 days        
The 2009 Plan [Member]          
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized (in shares)       5,550,000 2,550,000
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant (in shares) 3,186,865