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Note 6 - Investment Securities Available for Sale (Tables)
3 Months Ended
Mar. 31, 2017
Notes Tables  
Schedule of Available-for-sale Securities Reconciliation [Table Text Block]
   
March 31, 2017
 
           
Gross
   
Gross
         
   
Amortized
   
Unrealized
   
Unrealized
   
Fair
 
(Dollar amounts in thousands)
 
Cost
   
Gains
   
Losses
   
Value
 
                                 
U.S. government agency securities
  $
9,732
    $
167
    $
(72
)   $
9,827
 
Obligations of states and political subdivisions:
                               
Taxable
   
1,614
     
129
     
(3
)    
1,740
 
Tax-exempt
   
76,804
     
1,658
     
(505
)    
77,957
 
Mortgage-backed securities in government-sponsored entities
   
19,091
     
172
     
(227
)    
19,036
 
Private-label mortgage-backed securities
   
1,479
     
123
     
-
     
1,602
 
Total debt securities
   
108,720
     
2,249
     
(807
)    
110,162
 
Equity securities in financial institutions
   
170
     
120
     
-
     
290
 
Total
  $
108,890
    $
2,369
    $
(807
)   $
110,452
 
   
December 31, 2016
 
           
Gross
   
Gross
         
   
Amortized
   
Unrealized
   
Unrealized
   
Fair
 
   
Cost
   
Gains
   
Losses
   
Value
 
                                 
U.S. government agency securities
  $
10,158
    $
174
    $
(96
)   $
10,236
 
Obligations of states and political subdivisions:
                               
Taxable
   
1,615
     
129
     
(4
)    
1,740
 
Tax-exempt
   
78,327
     
1,678
     
(522
)    
79,483
 
Mortgage-backed securities in
   
 
     
 
     
 
     
-
 
government-sponsored entities
   
20,128
     
202
     
(261
)    
20,069
 
Private-label mortgage-backed securities
   
1,579
     
130
     
-
     
1,709
 
Total debt securities
   
111,807
     
2,313
     
(883
)    
113,237
 
Equity securities in financial institutions
   
750
     
389
     
-
     
1,139
 
Total
  $
112,557
    $
2,702
    $
(883
)   $
114,376
 
Investments Classified by Contractual Maturity Date [Table Text Block]
(Dollar amounts in thousands)
 
Amortized
Cost
   
Fair
Value
 
                 
Due in one year or less
  $
3,922
    $
3,975
 
Due after one year through five years
   
9,224
     
9,527
 
Due after five years through ten years
   
11,400
     
11,793
 
Due after ten years
   
84,174
     
84,867
 
                 
Total
  $
108,720
    $
110,162
 
   
For the Three Months
 
(Dollar amounts in thousands)
  Ended March 31,  
   
2017
   
2016
 
Proceeds from sales
  $
-
    $
1,322
 
Gross realized gains
   
488
     
51
 
Gross realized losses
   
-
     
-
 
Schedule of Unrealized Loss on Investments [Table Text Block]
   
March 31, 2017
 
   
Less than Twelve Months
   
Twelve Months or Greater
   
Total
 
           
Gross
           
Gross
           
Gross
 
   
Fair
   
Unrealized
   
Fair
   
Unrealized
   
Fair
   
Unrealized
 
(Dollar amounts in thousands)
 
Value
   
Losses
   
Value
   
Losses
   
Value
   
Losses
 
                                                 
U.S. government agency securities
  $
3,723
    $
(35
)   $
1,364
    $
(37
)   $
5,087
    $
(72
)
Obligations of states and political subdivisions
                                               
Taxable
   
506
     
(3
)    
-
     
-
     
506
     
(3
)
Tax-exempt
   
22,979
     
(505
)    
-
     
-
     
22,979
     
(505
)
Mortgage-backed securities in government-sponsored entities
   
9,432
     
(114
)    
4,401
     
(113
)    
13,833
     
(227
)
Total
  $
36,640
    $
(657
)   $
5,765
    $
(150
)   $
42,405
    $
(807
)
   
December 31, 2016
 
   
Less than Twelve Months
   
Twelve Months or Greater
   
Total
 
           
Gross
           
Gross
           
Gross
 
   
Fair
   
Unrealized
   
Fair
   
Unrealized
   
Fair
   
Unrealized
 
(Dollar amounts in thousands)
 
Value
   
Losses
   
Value
   
Losses
   
Value
   
Losses
 
                                                 
U.S. government agency securities
  $
3,803
    $
(47
)   $
1,316
    $
(49
)   $
5,119
    $
(96
)
Obligations of states and politcal subdivisions
                                               
Taxable
   
502
     
(4
)    
-
     
-
     
502
     
(4
)
Tax-exempt
   
23,554
     
(522
)    
-
     
-
     
23,554
     
(522
)
Mortgage-backed securities in government-sponsored entities
   
9,066
     
(126
)    
4,438
     
(135
)    
13,504
     
(261
)
Total
  $
36,925
    $
(699
)   $
5,754
    $
(184
)   $
42,679
    $
(883
)