Note 9 - Leases - Lease Information and Expenses (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021
Weighted average remaining lease term (years) (Year)	5 years 9 months 29 days		5 years 9 months 29 days		6 years 3 months 29 days
Weighted average discount rate	3.20%		3.20%		3.21%
Operating lease expense	$ 78	$ 94	$ 154	$ 187
Short-term lease expense	0	0	1	1
Total lease expense	78	94	155	188
Cash paid for amounts included in lease liabilities	78	92	156	184
Right-of-use assets obtained in exchange for operating lease liabilities commencing during the period	0	$ 0	25	$ 0
Other Liabilities [Member]
Lease liability	1,453		1,453		$ 1,558
Other Assets [Member]
Right-of-use asset	$ 1,427		$ 1,427		$ 1,532