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Note 21 - Fair Value of Financial Instruments - Balances of Impaired Loans and OREO Measured at Fair Value on Nonrecurring Basis (Details) - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Other Assets [Member]    
Financial assets measured at fair value $ 280  
Fair Value, Inputs, Level 1 [Member] | Other Assets [Member]    
Financial assets measured at fair value  
Fair Value, Inputs, Level 2 [Member] | Other Assets [Member]    
Financial assets measured at fair value  
Fair Value, Inputs, Level 3 [Member] | Other Assets [Member]    
Financial assets measured at fair value 280  
Impaired Loans [Member]    
Financial assets measured at fair value 1,568 $ 2,350
Impaired Loans [Member] | Fair Value, Inputs, Level 1 [Member]    
Financial assets measured at fair value
Impaired Loans [Member] | Fair Value, Inputs, Level 2 [Member]    
Financial assets measured at fair value
Impaired Loans [Member] | Fair Value, Inputs, Level 3 [Member]    
Financial assets measured at fair value 1,568 2,350
OREO [Member]    
Financial assets measured at fair value 4,858 6,038
OREO [Member] | Fair Value, Inputs, Level 1 [Member]    
Financial assets measured at fair value
OREO [Member] | Fair Value, Inputs, Level 2 [Member]    
Financial assets measured at fair value
OREO [Member] | Fair Value, Inputs, Level 3 [Member]    
Financial assets measured at fair value $ 4,858 $ 6,038