Note 4 - Securities - Fair Market Value of Securities Segregated by Purpose (Details) $ in Thousands	Jun. 30, 2016 USD ($)
Securities Pledged as Collateral [Member] | Public Funds Collateral [Member]
Pledged Securities	$ 18,353
Securities Pledged as Collateral [Member] | Federal Home Loan Bank Borrowings [Member]
Pledged Securities
Securities Pledged as Collateral [Member]
Pledged Securities	18,353
Securities Available to Be Pledged [Member] | Public Funds Collateral [Member]
Pledged Securities	10,936
Securities Available to Be Pledged [Member] | Federal Home Loan Bank Borrowings [Member]
Pledged Securities	21,809
Securities Available to Be Pledged [Member]
Pledged Securities	32,745
Public Funds Collateral [Member]
Pledged Securities	29,289
Federal Home Loan Bank Borrowings [Member]
Pledged Securities	21,809
Pledged Securities	$ 51,098