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Note 8 - Loans Receivable, Net - Loans Receivable (Details) - USD ($)
$ in Thousands
Mar. 31, 2018
Dec. 31, 2017
Mar. 31, 2017
Dec. 31, 2016
Loans receivable $ 600,538 $ 594,798    
Unamortized discounts 19 19    
Net deferred loan costs (450) (463)    
Allowance for loan losses 9,129 9,311 $ 9,590 $ 9,903
Total loans receivable, net 591,840 585,931    
Residential Portfolio Segment [Member]        
Loans receivable 107,055 107,005    
Allowance for loan losses 809 900 1,110 1,186
Commercial Real Estate Portfolio Segment [Member]        
Loans receivable 343,831 334,117    
Allowance for loan losses 5,198 5,073 4,958 4,953
Commercial Real Estate Portfolio Segment [Member] | Real Estate Loan [Member]        
Loans receivable 188,450 175,177    
Commercial Real Estate Portfolio Segment [Member] | Commercial Real Estate Other [Member]        
Loans receivable 155,381 158,940    
Consumer Portfolio Segment [Member]        
Loans receivable 72,770 73,767    
Allowance for loan losses 1,423 1,630 1,332 1,613
Commercial Portfolio Segment [Member]        
Loans receivable 76,882 79,909    
Allowance for loan losses $ 1,699 $ 1,708 $ 2,190 $ 2,151