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Note 8 - Goodwill and Intangible Assets (Details Textual) - USD ($)
12 Months Ended
May 01, 2019
Oct. 22, 2018
Dec. 31, 2019
Dec. 31, 2018
Goodwill, Acquired During Period     $ 16,275,000 $ 202,000
Amortization of Intangible Assets, Total     $ 600,000 $ 48,000
Planters First Bank [Member]        
Goodwill, Acquired During Period   $ 202,000    
Planters First Bank [Member] | Core Deposits [Member]        
Finite-lived Intangible Assets Acquired   $ 560,000    
LBC Bancshares, Inc [Member]        
Goodwill, Acquired During Period $ 15,700,000      
LBC Bancshares, Inc [Member] | Core Deposits [Member]        
Finite-lived Intangible Assets Acquired 3,100,000      
PFB Mortgage [Member]        
Goodwill, Acquired During Period $ 541,000