Note 8 - Leases - Lease Information and Expenses (Details) - USD ($) $ in Thousands	6 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Weighted average remaining lease term (in years) (Year)	4 years 6 months 29 days		4 years 6 months 29 days		5 years 1 month 20 days
Weighted average discount rate	3.29%		3.29%		3.29%
Operating lease expense	$ 91	$ 84	$ 275	$ 238
Short-term lease expense	10	1	11	2
Total lease expense	101	85	286	240
Cash paid for amounts included in lease liabilities	100	83	286	239
Right-of-use assets obtained in exchange for operating lease liabilities commencing during the period	0	$ 79	0	$ 104
Other Liabilities [Member]
Lease liability	1,205		1,205		$ 1,444
Other Assets [Member]
Right-of-use asset	$ 1,175		$ 1,175		$ 1,415