Note 18 - Goodwill and Intangible Assets (Details Textual) - USD ($)
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Goodwill, Acquired During Period   $ 20,639,000  
Goodwill, Period Increase (Decrease) $ 85,000 1,213,000  
Finite-Lived Intangible Assets, Accumulated Amortization $ 756,000 $ 508,000 $ 19,000
Core Deposits [Member]      
Finite-Lived Intangible Asset, Useful Life 7 years 7 years  
Finite-Lived Intangible Assets, Accumulated Amortization $ 1,283,000 $ 527,000  
Reunion Bank of Florida [Member]      
Goodwill, Period Increase (Decrease) 85,000    
Reunion Bank of Florida [Member] | Core Deposits [Member]      
Finite-lived Intangible Assets Acquired 1,539,000    
United Group Banking Company of Florida, Inc. [Member]      
Goodwill, Period Increase (Decrease)   1,571,000  
United Group Banking Company of Florida, Inc. [Member] | Core Deposits [Member]      
Finite-lived Intangible Assets Acquired $ 1,776,000    
CBI Holding Company, LLC [Member]      
Goodwill, Period Increase (Decrease)   $ (358,000)