Note 10 - Leases - Summary of Other Information Related to Operating Leases (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$ 223	$ 226
Weighted-average remaining lease term – operating leases (Year)	2 years	2 years 9 months 18 days
Weighted-average discount rate – operating leases	2.71%	2.64%