Note 8 - Leases - Lease Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Right-of-use lease asset	$ 2,348		$ 2,547
Weighted Average Remaining Lease Term (in years) (Year)	4 years 1 month 28 days		4 years 3 months 14 days
Weighted Average Discount Rate	2.94%		2.93%
Operating lease expense	$ 218	$ 217
Cash paid for operating leases	243	$ 246
Other Liabilities [Member]
Lease liability	$ 2,625		$ 2,848