Note 9 - Leases - Lease Information and Expenses (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Weighted average remaining lease term (in years) (Year)	6 years 18 days		6 years 3 months 29 days
Weighted average discount rate	3.19%		3.21%
Operating lease expense	$ 76	$ 93
Short-term lease expense	1	1
Total lease expense	77	94
Cash paid for amounts included in lease liabilities	78	92
Right-of-use assets obtained in exchange for operating lease liabilities commencing during the period	25	$ 0
Other Liabilities [Member]
Lease liability	1,518		$ 1,558
Other Assets [Member]
Right-of-use asset	$ 1,493		$ 1,532