Note 11 - Leases (Details Textual) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Operating Lease, Weighted Average Remaining Lease Term	13 years 51 days		13 years 51 days
Operating Lease, Weighted Average Discount Rate, Percent	3.48%		3.48%
Operating Lease, Cost	$ 48,000		$ 145,000
Operating Lease, Liability, Total	1,745,000		1,745,000
Operating Leases, Rent Expense, Total		$ 50,000		$ 150,000
Premises and Equipment [Member]
Operating Lease, Right-of-Use Asset	1,500,000		1,500,000
Other Liabilities [Member]
Operating Lease, Liability, Total	$ 1,700,000		$ 1,700,000