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Note 5 - Loans and Allowance for Loan Losses (Details) - Summary of Accretable Yield or Income Expected - Purchased Credit Impaired Loans [Member]
$ in Thousands
12 Months Ended
Dec. 31, 2015
USD ($)
Note 5 - Loans and Allowance for Loan Losses (Details) - Summary of Accretable Yield or Income Expected [Line Items]  
Balance at January 1 $ 0
New loans purchased 331
Accretion to income (12)
Disposals of loans 0
Reclassification (to) from nonaccretable difference 0
Balance at December 31 $ 319