Note 14 - Financial Instruments with Off-balance Sheet Risk and Concentrations of Credit Risk (Details) - Off-balance Sheet Financial Instruments - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Loan Origination Commitments [Member] | Fixed Rate [Member]
Note 14 - Financial Instruments with Off-balance Sheet Risk and Concentrations of Credit Risk (Details) - Off-balance Sheet Financial Instruments [Line Items]
Fair value of off balance sheet risks	$ 1,152	$ 165
Loan Origination Commitments [Member] | Variable Rate [Member]
Note 14 - Financial Instruments with Off-balance Sheet Risk and Concentrations of Credit Risk (Details) - Off-balance Sheet Financial Instruments [Line Items]
Fair value of off balance sheet risks	1,191	444
Unused lines of Credit [Member] | Variable Rate [Member]
Note 14 - Financial Instruments with Off-balance Sheet Risk and Concentrations of Credit Risk (Details) - Off-balance Sheet Financial Instruments [Line Items]
Fair value of off balance sheet risks	110,692	75,617
Construction Loans in Process [Member] | Fixed Rate [Member]
Note 14 - Financial Instruments with Off-balance Sheet Risk and Concentrations of Credit Risk (Details) - Off-balance Sheet Financial Instruments [Line Items]
Fair value of off balance sheet risks	2,237	755
Construction Loans in Process [Member] | Variable Rate [Member]
Note 14 - Financial Instruments with Off-balance Sheet Risk and Concentrations of Credit Risk (Details) - Off-balance Sheet Financial Instruments [Line Items]
Fair value of off balance sheet risks	36,700	10,062
Standby Letters of Credit [Member] | Variable Rate [Member]
Note 14 - Financial Instruments with Off-balance Sheet Risk and Concentrations of Credit Risk (Details) - Off-balance Sheet Financial Instruments [Line Items]
Fair value of off balance sheet risks	$ 5,660	$ 4,471