Note 14 - Commitments and Off-balance Sheet Risk (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Term Debt, Secured by Real Estate Balloon Payment, Period	5 years
Liabilities for Accreted Fee Collected from Customer	$ 100	$ 100
Amount of Federal Reserve Required	9,200	9,100
Reserve or Liability Balance for Financial Instruments With Off Balance Sheet Risk	0	$ 0
Interest Rate Swap [Member]
Derivative, Notional Amount	13,800
Derivative, Fair Value, Net	$ (1,800)
Minimum [Member]
Mortgage Loans on Real Estate, Interest Rate	4.00%
Amortization Period for Term Debt, Secured by Real Estate	10 years
Interest Rates on Loans, Secured by Non-real Estate Collateral	4.00%
Term Debt Secured, by Non-real Estate Collateral Maturity Period	3 years
Fees Accreted Into Income During Interest Rate Swap Agreements Term	4 years
Maximum [Member]
Mortgage Loans on Real Estate, Interest Rate	7.00%
Amortization Period for Term Debt, Secured by Real Estate	20 years
Interest Rates on Loans, Secured by Non-real Estate Collateral	7.50%
Term Debt Secured, by Non-real Estate Collateral Maturity Period	7 years
Fees Accreted Into Income During Interest Rate Swap Agreements Term	15 years