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Note 2 - Investment Securities (Details) - Investment Debt Securities by Contractual Maturity - USD ($)
$ in Thousands
Jun. 30, 2015
Dec. 31, 2014
Maturity:    
U.S. Government agency bonds 5 years $ (232)  
U.S. Government agency bonds 5 to 10 years 232  
U.S. Government agency mortgage-backed securities (232)  
Total 31,872 $ 34,135
Total 31,640 33,682
Corporate Bonds 5 to 10 Years [Member]    
Maturity:    
Corporate bonds 5 to 10 years 9,000  
Corporate bonds 5 to 10 years 9,036  
Corporate bonds 5 to 10 years 36  
U.S. Government agency bonds 5 to 10 years 9,000  
U.S. Government agency bonds 5 to 10 years 9,036  
US Government Agencies Debt Securities 5 Years [Member]    
Maturity:    
U.S. Government agency bonds 5 years 2,500  
U.S. Government agency bonds 5 years 2,494  
U.S. Government agency bonds 5 years (6)  
U.S. Government agency bonds 5 to 10 years 6  
U.S. Government agency mortgage-backed securities (6)  
US Government Agencies Debt Securities 5 to 10 Years [Member]    
Maturity:    
Corporate bonds 5 to 10 years 5,000  
Corporate bonds 5 to 10 years 4,935  
U.S. Government agency bonds 5 years 65  
U.S. Government agency bonds 5 to 10 years 5,000  
U.S. Government agency bonds 5 to 10 years 4,935  
U.S. Government agency bonds 5 to 10 years (65)  
U.S. Government agency mortgage-backed securities 65  
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]    
Maturity:    
U.S. Government agency bonds 5 years (197)  
U.S. Government agency bonds 5 to 10 years 197  
U.S. Government agency mortgage-backed securities 15,372  
U.S. Government agency mortgage-backed securities 15,175  
U.S. Government agency mortgage-backed securities (197)  
Total 15,372 17,635
Total $ 15,175 $ 17,337