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Note 9 - Subordinated Debentures (Details) - USD ($)
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2005
Note 9 - Subordinated Debentures (Details) [Line Items]      
Subordinated Debt $ 15,465,000 $ 15,465,000  
Guaranty Statutory Trust I [Member]      
Note 9 - Subordinated Debentures (Details) [Line Items]      
Guarantor Obligations, Maximum Exposure, Undiscounted     $ 5,000,000
Subordinated Debt     5,155,000
Guaranty Statutory Trust II [Member]      
Note 9 - Subordinated Debentures (Details) [Line Items]      
Guarantor Obligations, Maximum Exposure, Undiscounted     10,000,000
Subordinated Debt     $ 10,310,000