Note 9 - Leases - Lease Information and Expenses (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Weighted average remaining lease term (in years) (Year)	5 years 5 months 19 days		5 years 5 months 19 days		6 years 3 months 29 days
Weighted average discount rate	3.22%		3.22%		3.21%
Operating lease expense	$ 84	$ 92	$ 238	$ 279
Short-term lease expense	1	1	2	2
Total lease expense	85	93	240	281
Cash paid for amounts included in lease liabilities	83	91	239	275
Right-of-use assets obtained in exchange for operating lease liabilities commencing during the period	79	$ 0	104	$ 0
Other Liabilities [Member]
Lease liability	1,463		1,463		$ 1,558
Other Assets [Member]
Right-of-use asset	$ 1,436		$ 1,436		$ 1,532