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Note 6 - Investment Securities Available for Sale (Tables)
6 Months Ended
Jun. 30, 2017
Notes Tables  
Schedule of Available-for-sale Securities Reconciliation [Table Text Block]
   
June 30, 2017
 
           
Gross
   
Gross
         
   
Amortized
   
Unrealized
   
Unrealized
   
Fair
 
(Dollar amounts in thousands)
 
Cost
   
Gains
   
Losses
   
Value
 
                                 
U.S. government agency
securities
  $
9,383
    $
180
    $
(49
)   $
9,514
 
Obligations of states and
political subdivisions:
                               
Taxable
   
1,613
     
149
     
(2
)    
1,760
 
Tax-exempt
   
73,582
     
2,333
     
(40
)    
75,875
 
Mortgage-backed securities in
government-sponsored entities
   
17,455
     
192
     
(135
)    
17,512
 
Total debt securities
   
102,033
     
2,854
     
(226
)    
104,661
 
Equity securities in financial institutions
   
170
     
120
     
-
     
290
 
Total
  $
102,203
    $
2,974
    $
(226
)   $
104,951
 
   
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]
   
Amortized
   
Fair
 
(Dollar amounts in thousands)
 
Cost
   
Value
 
                 
Due in one year or less
  $
3,607
    $
3,652
 
Due after one year through five years
   
10,229
     
10,615
 
Due after five years through ten years
   
11,699
     
12,073
 
Due after ten years
   
76,498
     
78,321
 
                 
Total
  $
102,033
    $
104,661
 
Realized Gain (Loss) on Investments [Table Text Block]
(Dollar amounts in thousands)  
For the Three Months
Ended June 30,
   
For the Six Months
Ended June 30,
 
   
2017
   
2016
   
2017
   
2016
 
Proceeds from sales
  $
2,678
    $
7,793
    $
2,678
    $
9,115
 
Gross realized gains
   
-
     
255
     
488
     
306
 
Gross realized losses
   
-
     
(3
)    
-
     
(3
)
Schedule of Unrealized Loss on Investments [Table Text Block]
   
June 30, 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
  $
3,055
    $
(17
)   $
1,260
    $
(32
)   $
4,315
    $
(49
)
Obligations of states and political
subdivisions
                                               
Taxable
   
505
     
(2
)    
-
     
-
     
505
     
(2
)
Tax-exempt
   
4,574
     
(40
)    
311
     
-
     
4,885
     
(40
)
Mortgage-backed securities in
government-sponsored entities
   
7,431
     
(37
)    
4,148
     
(98
)    
11,579
     
(135
)
Total
  $
15,565
    $
(96
)   $
5,719
    $
(130
)   $
21,284
    $
(226
)
   
December 31, 2016
 
   
Less than Twelve Months
   
Twelve Months or Greater
   
Total
 
           
Gross
           
Gross
           
Gross
 
   
Fair
   
Unrealized
   
Fair
   
Unrealized
   
Fair
   
Unrealized
 
   
Value
   
Losses
   
Value
   
Losses
   
Value
   
Losses
 
                                                 
U.S. government agency securities
  $
3,803
    $
(47
)   $
1,316
    $
(49
)   $
5,119
    $
(96
)
Obligations of states and political
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
)