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Note 3 - Investment Securities (Details) - Amortized Cost and Fair Value of Debt Securities by Contractual Maturity - USD ($)
$ in Thousands
Sep. 30, 2015
Dec. 31, 2014
Amortized Cost and Fair Value of Debt Securities by Contractual Maturity [Abstract]    
Due in one year or less $ 1,513  
Due in one year or less 1,516  
Due in one year or less 0  
Due in one year or less 0  
Due after one year through five years 18,298  
Due after one year through five years 18,434  
Due after one year through five years 0  
Due after one year through five years 0  
Due after five years through ten years 15,809  
Due after five years through ten years 16,195  
Due after ten years 12,956  
Due after ten years 13,387  
Due after ten years 0  
Due after ten years 0  
48,576  
49,532  
0  
0  
Mortgage-backed securities and CMO 44,836  
Mortgage-backed securities and CMO 45,073  
Mortgage-backed securities and CMO 5  
Mortgage-backed securities and CMO 5  
93,412  
94,605  
5 $ 6
$ 5 $ 6