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Note 2 - Summary of Significant Accounting Policies (Tables)
 12 Months Ended
Dec. 31, 2017
Notes Tables  
Schedule of Cash Flow, Supplemental Disclosures [Table Text Block]
   
2017
    
2016
  
   
(Dollars in Thousands)
  
Cash paid
during the period for:
                
Interest
   $
2,566
     $
2,210
  
Income taxes
    
127
      
105
  
Non-cash transactions:
                
Assets acquired in settlement
of loans
    
773
      
1,289
  
Reissuance of
treasury stock as compensation
    
350
      
53
  
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
   
Year Ended December 31,
  
   
2017
    
2016
  
Basic shares
    
6,173,450
      
6,149,192
  
Dilutive
shares
    
318,001
      
272,550
  
Diluted shares
    
6,491,451
      
6,421,742
  
   
Year Ended December 31,
  
   
2017
    
2016
  
   
(Dollars in Thousands,
Except Per Share Data)
  
Net income
   $
(411)
     $
1,224
  
Basic net income per share
   $
(0.07)
     $
0.20
  
Diluted net income per share
   $
(0.06)
     $
0.19