Note 4 - Loans - Newly Restructured Loans and Types of Modifications (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2019
Financing receivable modifications		$ 66
Commercial Portfolio Segment [Member]
Financing receivable modifications		66
Extended Maturity [Member]
Financing receivable modifications		66
Extended Maturity [Member] | Commercial Portfolio Segment [Member]
Financing receivable modifications		66
Payment Deferral [Member]
Financing receivable modifications
Payment Deferral [Member] | Commercial Portfolio Segment [Member]
Financing receivable modifications