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Note 10 - Short-term Borrowings (Tables)
 12 Months Ended
Dec. 31, 2015
Disclosure Text Block [Abstract]  
Schedule of Short-term Debt [Table Text Block]

(Dollar amounts in thousands) 

  

2015

    

2014

  
                 

Balance at year-end

   $ 35,825     $ 14,808  

Average balance outstanding

     11,768       8,379  

Maximum month-end balance

     35,825       19,970  

Weighted-average rate at year-end

     1.37 %     0.98 %

Weighted-average rate during the year

     1.65 %     1.77 %
Schedule of Repurchase Agreements [Table Text Block]
   

Repurchase Agreements (Sweep) Accounted

for as Secured Borrowings

(in thousands)

Overnight and Continuous

  
   

December 31, 2015

    

December 31, 2014

  

Repurchase agreements:

                

U.S. Government agency securities

  $ 1,052     $ 1,090  

Mortgage-backed securities in government-sponsored entities

    1,877       2,091  
    $ 2,929     $ 3,181