Note 8 - Premises, Equipment, and Leases (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Impairment of Long-Lived Assets to be Disposed of	$ 812	$ 380	$ 1,010
Depreciation, Depletion and Amortization, Total	4,460	3,450	2,910
Operating Lease, Right-of-Use Asset	$ 830
Operating Lease, Weighted Average Discount Rate, Percent	3.22%
Operating Lease, Expense	$ 180	$ 203	$ 318
Other Liabilities [Member]
Operating Lease, Liability, Total	$ 891
Minimum [Member]
Lessee, Operating Lease, Remaining Lease Term (Year)	1 year
Maximum [Member]
Lessee, Operating Lease, Remaining Lease Term (Year)	9 years
Lease Acquired from Acquisition [Member]
Operating Lease, Liability, Total	$ 82