Note 10 - Borrowed Funds (Details Textual) $ in Millions	Dec. 31, 2018 USD ($)
Unsecured Line of Credit [Member]
Line of Credit Facility, Maximum Borrowing Capacity	$ 9.5
Secured Line of Credit [Member]
Line of Credit Facility, Maximum Borrowing Capacity	9.0
Federal Home Loan Bank Advances [Member]
Line of Credit Facility, Maximum Borrowing Capacity	46.4
Federal Reserve Bank Advances [Member]
Line of Credit Facility, Maximum Borrowing Capacity	$ 25.6