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Note 2 - Debt Securities (Tables)
6 Months Ended
Jun. 30, 2018
Notes Tables  
Schedule of Available-for-sale Securities Reconciliation [Table Text Block]
   
June 30, 2018
 
   
Amortized
   
Unrealized
   
Unrealized
   
Fair
 
   
Cost
   
Gains
   
Losses
   
Value
 
(Amounts in thousands)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
U.S. Agency securities
  $
1,166
    $
4
    $
-
    $
1,170
 
U.S. Treasury securities
   
49,827
     
-
     
(19
)    
49,808
 
Municipal securities
   
99,451
     
1,063
     
(909
)    
99,605
 
Single issue trust preferred securities
   
9,374
     
-
     
(391
)    
8,983
 
Mortgage-backed Agency securities
   
37,816
     
34
     
(991
)    
36,859
 
Total
  $
197,634
    $
1,101
    $
(2,310
)   $
196,425
 
   
December 31, 2017
 
   
Amortized
   
Unrealized
   
Unrealized
   
Fair
 
   
Cost
   
Gains
   
Losses
   
Value
 
(Amounts in thousands)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
U.S. Agency securities
  $
11,289
    $
17
    $
(10
)   $
11,296
 
U.S. Treasury securities
   
19,987
     
-
     
(16
)    
19,971
 
Municipal securities
   
101,552
     
2,203
     
(107
)    
103,648
 
Single issue trust preferred securities
   
9,367
     
-
     
(483
)    
8,884
 
Mortgage-backed Agency securities
   
22,095
     
46
     
(415
)    
21,726
 
Total
  $
164,290
    $
2,266
    $
(1,031
)   $
165,525
 
Debt Securities, Held-to-maturity [Table Text Block]
   
June 30, 2018
 
   
Amortized
   
Unrealized
   
Unrealized
   
Fair
 
   
Cost
   
Gains
   
Losses
   
Value
 
(Amounts in thousands)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
U.S. Agency securities
  $
17,913
    $
-
    $
(74
)   $
17,839
 
Corporate securities
   
7,169
     
-
     
(28
)    
7,141
 
Total
  $
25,082
    $
-
    $
(102
)   $
24,980
 
   
December 31, 2017
 
   
Amortized
   
Unrealized
   
Unrealized
   
Fair
 
   
Cost
   
Gains
   
Losses
   
Value
 
(Amounts in thousands)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
U.S. Agency securities
  $
17,937
    $
-
    $
(49
)   $
17,888
 
Corporate securities
   
7,212
     
-
     
(16
)    
7,196
 
Total
  $
25,149
    $
-
    $
(65
)   $
25,084
 
Investments Classified by Contractual Maturity Date [Table Text Block]
   
June 30, 2018
 
   
Amortized
   
 
 
 
(Amounts in thousands)
 
Cost
   
Fair Value
 
Available-for-sale debt securities
 
 
 
 
 
 
 
 
Due within one year
  $
49,827
    $
49,808
 
Due after one year but within five years
   
9,902
     
10,014
 
Due after five years but within ten years
   
97,955
     
97,590
 
Due after ten years
   
2,134
     
2,154
 
     
159,818
     
159,566
 
Mortgage-backed securities
   
37,816
     
36,859
 
Total debt securities available for sale
  $
197,634
    $
196,425
 
                 
Held-to-maturity debt securities
 
 
 
 
 
 
 
 
Due within one year
  $
25,082
    $
24,980
 
Due after one year but within five years
   
-
     
-
 
Due after five years but within ten years
   
-
     
-
 
Due after ten years
   
-
     
-
 
Total debt securities held to maturity
  $
25,082
    $
24,980
 
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Table Text Block]
   
June 30, 2018
 
   
Less than 12 Months
   
12 Months or Longer
   
Total
 
   
Fair
   
Unrealized
   
Fair
   
Unrealized
   
Fair
   
Unrealized
 
   
Value
   
Losses
   
Value
   
Losses
   
Value
   
Losses
 
(Amounts in thousands)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
U.S. Agency securities
  $
-
    $
-
    $
-
    $
-
    $
-
    $
-
 
U.S. Treasury securities
   
49,808
     
(19
)    
-
     
-
     
49,808
     
(19
)
Municipal securities
   
27,572
     
(803
)    
1,569
     
(106
)    
29,141
     
(909
)
Single issue trust preferred securities
   
-
     
-
     
8,983
     
(391
)    
8,983
     
(391
)
Mortgage-backed Agency securities
   
19,744
     
(257
)    
12,690
     
(734
)    
32,434
     
(991
)
Total
  $
97,124
    $
(1,079
)   $
23,242
    $
(1,231
)   $
120,366
    $
(2,310
)
   
December 31, 2017
 
   
Less than 12 Months
   
12 Months or Longer
   
Total
 
   
Fair
   
Unrealized
   
Fair
   
Unrealized
   
Fair
   
Unrealized
 
   
Value
   
Losses
   
Value
   
Losses
   
Value
   
Losses
 
(Amounts in thousands)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
U.S. Agency securities
  $
10,054
    $
(10
)   $
-
    $
-
    $
10,054
    $
(10
)
U.S. Treasury securities
   
19,972
     
(16
)    
-
     
-
     
19,972
     
(16
)
Municipal securities
   
8,047
     
(55
)    
2,314
     
(52
)    
10,361
     
(107
)
Single issue trust preferred securities
   
-
     
-
     
8,884
     
(483
)    
8,884
     
(483
)
Mortgage-backed Agency securities
   
4,276
     
(25
)    
14,069
     
(390
)    
18,345
     
(415
)
Total
  $
42,349
    $
(106
)   $
25,267
    $
(925
)   $
67,616
    $
(1,031
)
Schedule of Held to Maturity Debt Securities [Table Text Block]
   
June 30, 2018
 
   
Less than 12 Months
   
12 Months or Longer
   
Total
 
   
Fair
   
Unrealized
   
Fair
   
Unrealized
   
Fair
   
Unrealized
 
   
Value
   
Losses
   
Value
   
Losses
   
Value
   
Losses
 
(Amounts in thousands)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
U.S. Agency securities
  $
17,839
    $
(74
)   $
-
    $
-
    $
17,839
    $
(74
)
Corporate securities
   
7,141
     
(28
)    
-
     
-
     
7,141
     
(28
)
Total
  $
24,980
    $
(102
)   $
-
    $
-
    $
24,980
    $
(102
)
   
December 31, 2017
 
   
Less than 12 Months
   
12 Months or Longer
   
Total
 
   
Fair
   
Unrealized
   
Fair
   
Unrealized
   
Fair
   
Unrealized
 
   
Value
   
Losses
   
Value
   
Losses
   
Value
   
Losses
 
(Amounts in thousands)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
U.S. Agency securities
  $
17,888
    $
(49
)   $
-
    $
-
    $
17,888
    $
(49
)
Corporate securities
   
7,196
     
(16
)    
-
     
-
     
7,196
     
(16
)
Total
  $
25,084
    $
(65
)   $
-
    $
-
    $
25,084
    $
(65
)
Realized Gain (Loss) on Investments [Table Text Block]
   
Three Months Ended
   
Six Months Ended
 
   
June 30,
   
June 30,
 
   
2018
   
2017
   
2018
   
2017
 
(Amounts in thousands)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Gross realized gains
  $
-
    $
-
    $
-
    $
-
 
Gross realized losses
   
-
     
(657
)    
-
     
(657
)
Net loss on sale of securities
  $
-
    $
(657
)   $
-
    $
(657
)