Note 10 - Leases - Summary of Other Information Related to Operating Leases (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$ 226	$ 739
Weighted-average remaining lease term – operating leases (Year)	2 years 9 months 18 days	2 years 3 months 18 days
Weighted-average discount rate – operating leases	2.64%	1.85%