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Note 18 - Commitments and Contingencies (Details) - The Company's Exposure to Off-balance Sheet Risk - USD ($)
Dec. 31, 2015
Dec. 31, 2014
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]    
Exposure to off-balance sheet risk $ 120,763,000 $ 87,692,000
Commitments to Extend Credit [Member]    
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]    
Exposure to off-balance sheet risk 69,625,000 40,949,000
Overdraft Protection [Member]    
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]    
Exposure to off-balance sheet risk 50,797,000 46,358,000
Standby Letters of Credit [Member]    
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]    
Exposure to off-balance sheet risk $ 341,000 $ 385,000