Note 4 - Securities - Fair Market Value of Securities Segregated by Purpose (Details) $ in Thousands	Sep. 30, 2016 USD ($)
Securities Pledged as Collateral [Member] | Public Funds Collateral [Member]
Pledged Securities	$ 17,687
Securities Pledged as Collateral [Member] | Federal Home Loan Bank Borrowings [Member]
Pledged Securities
Securities Pledged as Collateral [Member]
Pledged Securities	17,687
Securities Available to Be Pledged [Member] | Public Funds Collateral [Member]
Pledged Securities	7,921
Securities Available to Be Pledged [Member] | Federal Home Loan Bank Borrowings [Member]
Pledged Securities	18,616
Securities Available to Be Pledged [Member]
Pledged Securities	26,537
Public Funds Collateral [Member]
Pledged Securities	25,608
Federal Home Loan Bank Borrowings [Member]
Pledged Securities	18,616
Pledged Securities	$ 44,224