Note 8 - Leases - Lease Information and Expenses (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Weighted average remaining lease term (in years) (Year)	4 years 9 months 3 days		4 years 9 months 3 days		5 years 1 month 20 days
Weighted average discount rate	3.29%		3.29%		3.29%
Operating lease expense	$ 92	$ 78	$ 184	$ 154
Short-term lease expense	0	0	1	1
Total lease expense	92	78	185	155
Cash paid for amounts included in lease liabilities	92	78	186	156
Right-of-use assets obtained in exchange for operating lease liabilities commencing during the period	0	$ 0	0	$ 25
Other Liabilities [Member]
Lease liability	1,284		1,284		$ 1,444
Other Assets [Member]
Right-of-use asset	$ 1,255		$ 1,255		$ 1,415