Note 2 - Business Combinations (Tables)
 12 Months Ended
Dec. 31, 2016
Notes Tables  
Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block]
   
As Recorded
   
Fair Value
     
As Recorded
 
   
By Reunion
   
Adjustments
     
By the Company
 
Cash and cash equivalents
   $
3,136
     
-
 
 
    
3,136
 
Investment securities
    
19,261
     
(135
 )
a
    
19,126
 
Loans
    
265,492
     
(7,078
 )
b
    
258,414
 
Allowance for loan losses
    
2,429
     
(2,429
 )
c
    
-
 
Net loans
    
263,063
     
(4,649
 )
 
    
258,414
 
Premises and equipment, net
    
3,922
     
-
 
 
    
3,922
 
Core deposit intangible
    
-
     
1,539
 
d
    
1,539
 
Bank-owned life insurance
    
4,098
     
-
 
 
    
4,098
 
Other real estate and repossessions
    
92
     
-
 
 
    
92
 
Other assets
    
21,371
     
(2,003
 )
e
    
19,368
 
Total assets
   $
314,943
     
(5,248
 )
 
    
309,695
 
                           
Non-interest bearing deposits
   $
80,382
     
-
 
 
    
80,382
 
Interest-bearing deposits
    
196,957
     
320
 
f
    
197,277
 
Total deposits
    
277,339
     
320
 
 
    
277,659
 
                           
Other liabilities
    
10,561
     
(1,084
 )
e
    
9,477
 
Total liabilities
    
287,900
     
(764
 )
 
    
287,136
 
                           
Net identifiable assets acquired over liabilities assumed
    
27,043
     
(4,484
 )
 
    
22,559
 
                           
Goodwill
    
-
     
20,639
 
 
    
20,639
 
                           
Net assets acquired over liabilities assumed
   $
27,043
     
16,155
 
 
    
43,198
 
                           
                           
Consideration:
 
 
 
 
 
 
 
 
  
 
 
 
 
                           
Shares of common stock issued
    
 
      
1,339,129
 
 
    
 
  
Estimated value per share of the Company's stock
    
 
     $
25.11
 
 
    
 
  
                           
Fair value of Company stock issued
    
 
      
33,626
 
 
    
 
  
Cash paid for shares and in lieu of fractional shares
    
 
      
7,369
 
 
    
 
  
Value of assumed stock options
    
 
      
2,203
 
 
    
 
  
                           
Fair value of total consideration transferred
    
 
     $
43,198
 
 
    
 
  
Business Acquisition, Pro Forma Information [Table Text Block]
   
For The Year Ended December 31,
  
Performance Measure (pro forma, unaudited)
  
2015
    
2014
  
Net interest income
   $
58,708
     
52,022
 
Net earnings
  $
10,727
     
8,961
 
Diluted earnings per common share
   $
1.02
     
1.01
 
Schedule Of Loans Acquired [Table Text Block]
   
Reunion
  
   
Acquired
Impaired
Loans
    
Acquired
Performing
Loans
    
Total
Acquired
Loans
  
Commercial, financial, and agricultural
  $
296
     
36,601
     
36,897
 
Real estate - mortgage
   
4,717
     
188,648
     
193,365
 
Real estate - construction
   
116
     
23,931
     
24,047
 
Consumer
   
34
     
4,071
     
4,105
 
Total
  $
5,163
     
253,251
     
258,414
 
   
United
  
   
Acquired
Impaired
Loans
    
Acquired
Performing
Loans
    
Total
Acquired
Loans
  
Commercial, financial, and agricultural
  $
929
     
22,274
     
23,203
 
Real estate - mortgage
   
6,844
     
105,361
     
112,205
 
Real estate - construction
   
918
     
7,377
     
8,295
 
Consumer
   
336
     
5,887
     
6,223
 
Total
  $
9,027
     
140,899
     
149,926
 
Summary Of Purchased Impaired Loan Acquired [Table Text Block]
   
Reunion
    
United
  
Contractually required principal and interest payments
   $
9,348
     
11,956
 
Non-accretable difference
    
4,185
     
2,929
 
Cash flows expected to be collected
    
5,163
     
9,027
 
Accretable discount
    
-
     
-
 
Fair value of loans acquired with a deterioration of credit quality
   $
5,163
     
9,027
 
Certain Loans Acquired in Transfer not Accounted for as Debt Securities Accretable Yield [Table Text Block]
   
2016
    
2015
    
2014
  
Balance, beginning of year
   $
4,059
     
1,467
     
-
 
Acquisition of United
    
-
     
-
     
1,480
 
Purchase adjustments to United accretable yield
    
-
     
314
     
-
 
Acquisition of Reunion
    
-
     
2,627
     
-
 
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