Note 12 - Leases (Details Textual)	12 Months Ended
	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)
Number of Operating Leases in Bank Branch Locations, Lessee	4
Number of Operating Leases in Administrative and Operational Spaces, Lessee	3
Number of Operating Leases in Equipment Leases, Lessee	1
Operating Lease, Right-of-Use Asset	$ 3,160,000
Operating Lease, Cost	517,000
Variable Lease, Cost	27,000
Lessee, Operating Lease, Liability, Payments, Due, Total	3,925,000
Lessor, Operating Lease, Payments to be Received, Total	2,000,000
Operating Lease, Expense	636,000	$ 593,000	$ 953,000
Operating Lease, Lease Income, Total	589,000	413,000	399,000
Operating Lease, Initial Direct Cost Expense, over Term	5,000	$ 5,000	$ 5,000
Accrued Expenses and Other Liabilities [Member]
Operating Lease, Liability, Total	$ 3,264,000