Note 4 - Loans and Leases (Details Textual) Pure in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019 USD ($)	Sep. 30, 2018	Sep. 30, 2019 USD ($)	Sep. 30, 2018	Dec. 31, 2018 USD ($)
Loans and Leases Receivable, Related Parties, Ending Balance	$ 45,000,000		$ 45,000,000		$ 53,000,000
Financing Receivable, Modifications, Number of Contracts	0	0	0	0
Financing Receivable, Troubled Debt Restructuring, Subsequent Default, Number of Contracts	0	0	0	0
Mortgage Loans in Process of Foreclosure, Amount	$ 140,000		$ 140,000		$ 528,000