Quarterly report pursuant to Section 13 or 15(d)

Note 7 - Employee and Director Benefits (Details Textual)

v3.20.1
Note 7 - Employee and Director Benefits (Details Textual) - USD ($)
3 Months Ended 12 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Dec. 31, 2014
Share-based Payment Arrangement, Expense $ 276,000 $ 282,000  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value (in dollars per share) $ 12.20    
Share-based Payment Arrangement, Option [Member]      
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount, Total $ 1,100,000    
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year) 1 year 8 months 12 days    
Restricted Stock [Member]      
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount, Total $ 1,800,000    
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year) 3 years    
The 2009 Plan [Member]      
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized (in shares)     5,550,000
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period (Year)     10 years