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Note 3 - Available-for-sale Securities (Tables)
12 Months Ended
Dec. 31, 2016
Notes Tables  
Available-for-sale Securities [Table Text Block]
(In thousands)
 
Amortized
Cost
   
Gross
Unrealized
Gains
   
Gross
Unrealized
Losses
   
Fair
Value
 
December 31, 2016:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
U. S. Government agency mortgage-backed securities
  $
10,624
     
9
     
192
     
10,441
 
Corporate bonds
   
9,000
     
-
     
39
     
8,961
 
Subordinated Notes
   
5,000
     
26
     
-
     
5,026
 
    $
24,624
     
35
     
231
     
24,428
 
December 31, 2015:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
U. S. Government agency mortgage-backed securities
  $
13,625
     
-
     
212
     
13,413
 
Corporate bonds
   
9,000
     
71
     
61
     
9,010
 
U. S. Government agency bonds
   
5,000
     
-
     
46
     
4,954
 
Subordinated Notes
   
2,000
     
-
     
-
     
2,000
 
    $
29,625
     
71
     
319
     
29,377
 
Schedule of Unrealized Loss on Investments [Table Text Block]
(In thousands)
 
Less than 12 Months
   
12 Months or More
   
Total
 
December 31, 2016:
 
Fair
Value
   
Unrealized
Loss
   
Fair
Value
   
Unrealized
Loss
   
Fair
Value
   
Unrealized
Loss
 
U. S. Government agency mortgage-backed securities
  $
5,969
     
144
     
3,356
     
48
     
9,325
     
192
 
Corporate bonds
   
-
     
-
     
5,961
     
39
     
5,961
     
39
 
    $
5,969
     
144
     
9,317
     
87
     
15,286
     
231
 
December 31, 2015:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
U. S. Government agency bonds
  $
4,954
     
46
     
-
     
-
     
4,954
     
46
 
U. S. Government agency mortgage-backed securities
   
2,863
     
42
     
10,550
     
170
     
13,413
     
212
 
Corporate bonds
   
-
     
-
     
5,939
     
61
     
5,939
     
61
 
    $
7,817
     
88
     
16,489
     
231
     
24,306
     
319
 
Investments Classified by Contractual Maturity Date [Table Text Block]
(In thousands)
 
Amortized Cost
   
Fair Value
 
December 31, 2016:
 
Due
Within
5 years
   
Due After
5 years
through
10 years
   
Due
After
10 years
   
Total
   
Due
Within
5 years
   
Due After
5 years
through
10 years
   
Due
After
10 years
   
Total
 
Corporate bonds
  $
9,000
     
-
     
-
     
9,000
     
8,961
     
-
     
-
     
8,961
 
Subordinated Notes
   
1,000
     
4,000
     
-
     
5,000
     
1,026
     
4,000
     
-
     
5,026
 
Available-for-sale securities
with single maturity dates
   
10,000
     
4,000
     
-
     
14,000
     
9,987
     
4,000
     
-
     
13,987
 
U. S. Government agency
mortgage-backed securities
   
-
     
2,132
     
8,492
     
10,624
     
-
     
2,106
     
8,335
     
10,441
 
    $
10,000
     
6,132
     
8,492
     
24,624
     
9,987
     
6,106
     
8,335
     
24,428
 
December 31, 2015:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Corporate bonds
  $
-
     
9,000
     
-
     
9,000
     
-
     
9,010
     
-
     
9,010
 
U. S. Government agency bonds
   
-
     
5,000
     
-
     
5,000
     
-
     
4,954
     
-
     
4,954
 
Subordinated Notes
   
-
     
2,000
     
-
     
2,000
     
-
     
2,000
     
-
     
2,000
 
Available-for-sale securities
with single maturity dates
   
-
     
16,000
     
-
     
16,000
     
-
     
15,964
     
-
     
15,964
 
U. S. Government agency
mortgage-backed securities
   
-
     
2,905
     
10,720
     
13,625
     
-
     
2,863
     
10,550
     
13,413
 
    $
-
     
18,905
     
10,720
     
29,625
     
-
     
18,827
     
10,550
     
29,377