Note 8 - Leases - Lease Information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020
Right-of-use lease asset	$ 2,149		$ 2,149		$ 2,547
Weighted Average Remaining Lease Term (in years) (Year)	4 years 18 days		4 years 18 days		4 years 3 months 14 days
Weighted Average Discount Rate	2.96%		2.96%		2.93%
Operating lease expense	$ 218	$ 212	$ 437	$ 429
Cash paid for operating leases	245	$ 234	488	$ 480
Other Liabilities [Member]
Lease liability	$ 2,399		$ 2,399		$ 2,848