Note 2 - Business Combinations - Summary of Changes in Carrying Amount of Accretable Yield on Acquired Loans (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Balance, beginning of year $ 4,059 $ 1,467
Purchase adjustments to United accretable yield 314
Accretion (1,940) (743) (13)
Net transfers from non-accretable difference to accretable yield 816 394
Balance, end of year 2,935 4,059 1,467
United Group Banking Company of Florida, Inc. [Member]      
Acquisition 1,480
Reunion Bank of Florida [Member]      
Acquisition $ 2,627