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Note 4 - Securities Available for Sale (Tables)
 12 Months Ended
Dec. 31, 2017
Notes Tables  
Available-for-sale Securities [Table Text Block]
 
(Dollars in thousands)
  
Amortized
cost
    
Gross
unrealized
gains
    
Gross
unrealized
losses
    
Fair v
alue
  
December 31
,
201
7
  
 
 
 
  
 
 
 
  
 
 
 
  
 
 
 
Mortgage-backed securities:
  
 
 
 
  
 
 
 
  
 
 
 
  
 
 
 
Federal Home Loan Mortgage Corporation (FHLMC)
  
$
91
    
 
2
    
 
0
    
 
93
  
Federal National Mortgage Association (FNMA)
  
 
4,834
    
 
1
    
 
(78
)
  
 
4,757
  
Collateralized mortgage obligations:
  
 
 
 
  
 
 
 
  
 
 
 
  
 
 
 
FNMA
  
 
223
    
 
0
    
 
(5
)
  
 
218
  
   
 
5,148
    
 
3
    
 
(83
)
  
 
5,068
  
Other marketable securities:
  
 
 
 
  
 
 
 
  
 
 
 
  
 
 
 
U.S. Government agency obligations
  
 
69,962
    
 
0
    
 
(1,201
)
  
 
68,761
  
Municipal obligations
  
 
2,699
    
 
2
    
 
(8
)
  
 
2,693
  
Corporate obligations
  
 
234
    
 
0
    
 
(1
)
  
 
233
  
Corporate preferred stock
  
 
700
    
 
0
    
 
(140
)
  
 
560
  
Corporate equity
  
 
58
    
 
99
    
 
0
    
 
157
  
   
 
73,653
    
 
101
    
 
(1,350
)
  
 
72,404
  
   
$
78,801
    
 
104
    
 
(1,433
)
  
 
77,472
  
                                 
                                 
 
December 31
,
2016
                                
Mortgage-backed securities:
                                
FHLMC
   $
327
      
10
      
0
      
337
  
FNMA
    
295
      
7
      
0
      
302
  
Collateralized mortgage obligations:
                                
FNMA
    
371
      
0
      
(5
 )    
366
  
     
993
      
17
      
(5
 )    
1,005
  
Other marketable securities:
                                
U.S. Government agency obligations
    
74,979
      
16
      
(1,079
 )    
73,916
  
Municipal obligations
    
2,819
      
0
      
(20
 )    
2,799
  
Corporate obligations
    
290
      
2
      
0
      
292
  
Corporate preferred stock
    
700
      
0
      
(350
 )    
350
  
Corporate equity
    
58
      
57
      
0
      
115
  
     
78,846
      
75
      
(1,449
 )    
77,472
  
    $
79,839
      
92
      
(1,454
 )    
78,477
  
                                 
Contractual Obligation, Fiscal Year Maturity Schedule [Table Text Block]
   
 
Payments Due by Period
  
(Dollars in thousands)
  
Total
    
Less than 1
Year
    
1-3 Years
    
4-5 Years
    
More than
5 Years
  
Contractual Obligations:
                                        
Annual rental commitments under non-cancellable operating leases
   $
5,740
      
888
      
1,740
      
1,679
      
1,433
  
Total contractual obligations
   $
5,740
      
888
      
1,740
      
1,679
      
1,433
  
Schedule of Unrealized Loss on Investments [Table Text Block]
   
Less Than Twelve M
onths
    
Twelve Months or M
ore
    
Total
  
(Dollars in thousands)
  
# of Investments
    
Fair
Value
    
Unrealized Losses
    
# of Investments
    
Fair Value
    
Unrealized Losses
    
Fair
Value
    
Unrealized Losses
  
December 31, 201
7
  
 
 
 
  
 
 
 
  
 
 
 
  
 
 
 
  
 
 
 
  
 
 
 
  
 
 
 
  
 
 
 
Mortgage backed securities:
  
 
 
 
  
 
 
 
  
 
 
 
  
 
 
 
  
 
 
 
  
 
 
 
  
 
 
 
  
 
 
 
FNMA
  
 
2
    
$
4,703
    
 
(78
)
  
 
0
    
$
0
    
 
0
    
$
4,703
    
 
(78
)
Collateralized mortgage obligations:
  
 
 
 
  
 
 
 
  
 
 
 
  
 
 
 
  
 
 
 
  
 
 
 
  
 
 
 
  
 
 
 
FNMA
  
 
1
    
 
218
    
 
(5
)
  
 
0
    
 
0
    
 
0
    
 
218
    
 
(5
)
Other marketable securities:
  
 
 
 
  
 
 
 
  
 
 
 
  
 
 
 
  
 
 
 
  
 
 
 
  
 
 
 
  
 
 
 
U.S. Government agency
obligations
  
 
2
    
 
9,819
    
 
(163
)
  
 
12
    
 
58,942
    
 
(1,038
)
  
 
68,761
    
 
(1,201
)
Municipal obligations
  
 
14
    
 
2,268
    
 
(8
)
  
 
0
    
 
0
    
 
0
    
 
2,268
    
 
(8
)
Corporate obligations
  
 
1
    
 
233
    
 
(1
)
  
 
0
    
 
0
    
 
0
    
 
233
    
 
(1
)
Corporate preferred stock
  
 
0
    
 
0
    
 
0
    
 
1
    
 
560
    
 
(140
)
  
 
560
    
 
(140
)
Total temporarily impaired securities
  
 
20
    
$
17,241
    
 
(255
)
  
 
13
    
$
59,502
    
 
(1,178
)
  
$
76,743
    
 
(1,433
)
                                                                 
                                                                 
December 31, 2016
                                                                
Collateralized mortgage obligations:
                                                                
FNMA
    
1
     $
262
      
(3
 )    
1
     $
104
      
(2
 )   $
366
      
(5
 )
Other marketable securities:
                                                                
U.S. Government agency obligations
    
13
      
63,896
      
(1,079
 )    
0
      
0
      
0
      
63,896
      
(1,079
 )
Municipal obligations
    
14
      
2,327
      
(19
 )    
2
      
214
      
(1
 )    
2,541
      
(20
 )
Corporate preferred stock
    
0
      
0
      
0
      
1
      
350
      
(350
 )    
350
      
(350
 )
Total temporarily impaired securities
    
28
     $
66,485
      
(1,101
 )    
4
     $
668
      
(353
 )   $
67,153
      
(1,454
 )
Available-for-sale Securities [Member]  
Notes Tables  
Contractual Obligation, Fiscal Year Maturity Schedule [Table Text Block]
(Dollars in thousands)
  
Amortized
C
ost
    
Fair
V
alue
  
Due one year
or less
   $
1,202
      
1,188
  
Due after one year through five years
    
74,950
      
73,706
  
Due after five years through ten years
    
1,780
      
1,752
  
Due after ten years
    
811
      
669
  
No stated maturity
    
58
      
157
  
Total
   $
78,801
      
77,472