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Note 4 - Loans and Allowance for Loan Losses (Details) - Loans - USD ($)
$ in Thousands
Jun. 30, 2015
Mar. 31, 2015
Dec. 31, 2014
Jun. 30, 2014
Mar. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Real estate mortgage loans:              
Loans $ 307,741   $ 308,268     $ 300,229  
Consumer loans:              
Less undisbursed portion of loans in process (5,824)   (3,325)     (7,142)  
Principal loan balance 301,917   304,943     293,087  
Deferred loan origination fees, net 548   506     341  
Allowance for loan losses (3,600) $ (3,634) (4,846) $ (5,066) $ (5,011) (4,922) $ (4,736)
Loans, net 298,865   300,603     288,506  
Residential Mortgage Segment [Member]              
Consumer loans:              
Principal loan balance     106,679     107,029  
Deferred loan origination fees, net     49     52  
Allowance for loan losses     (609)     (811) (922)
Land Segment [Member]              
Consumer loans:              
Principal loan balance     11,028     10,309  
Deferred loan origination fees, net     4     2  
Allowance for loan losses     (201)     (152) (71)
Home Equity And Second Mortgage [Member]              
Consumer loans:              
Principal loan balance     37,513     34,815  
Deferred loan origination fees, net     481     328  
Allowance for loan losses     (720)     (877) $ (919)
Real Estate Portfolio Segment [Member] | Residential Mortgage Segment [Member]              
Real estate mortgage loans:              
Loans 107,136   106,679        
Real Estate Portfolio Segment [Member] | Land Segment [Member]              
Real estate mortgage loans:              
Loans 10,526   11,028        
Real Estate Portfolio Segment [Member] | Construction Loans [Member]              
Real estate mortgage loans:              
Loans 13,691   10,347        
Consumer loans:              
Principal loan balance 8,341   8,444        
Deferred loan origination fees, net 0   (1)        
Allowance for loan losses (51) (65) (60) (78) (70) (63)  
Real Estate Portfolio Segment [Member] | Commercial Real Estate Segment [Member]              
Real estate mortgage loans:              
Loans 75,521   78,314        
Real Estate Portfolio Segment [Member] | Commercial Real Estate Construction Segment [Member]              
Real estate mortgage loans:              
Loans 474   1,422        
Commercial Portfolio Segment [Member]              
Real estate mortgage loans:              
Loans 24,983   28,282        
Consumer loans:              
Principal loan balance 24,983   28,282        
Deferred loan origination fees, net (7)   (7)        
Allowance for loan losses (161) (239) (1,480) (1,444) (1,450) (1,446)  
Consumer Portfolio Segment [Member] | Home Equity And Second Mortgage [Member]              
Real estate mortgage loans:              
Loans 37,844   37,513        
Consumer loans:              
Principal loan balance 37,844   37,513        
Deferred loan origination fees, net 525   481        
Allowance for loan losses (648) (716) (720) (932) (902) (877)  
Consumer Portfolio Segment [Member] | Automobile Loan [Member]              
Real estate mortgage loans:              
Loans 27,194   25,274        
Consumer Portfolio Segment [Member] | Loans Secured by Savings Accounts [Member]              
Real estate mortgage loans:              
Loans 920   1,018        
Consumer Portfolio Segment [Member] | Unsecured Loan [Member]              
Real estate mortgage loans:              
Loans 3,445   3,316        
Consumer Portfolio Segment [Member] | Other Consumer Loan [Member]              
Real estate mortgage loans:              
Loans 6,007   5,075        
Consumer loans:              
Principal loan balance 37,566   34,683        
Deferred loan origination fees, net 0   0        
Allowance for loan losses $ (264) $ (283) $ (275) $ (336) $ (331) $ (289)