Note 6 - Leases - Leases Cost (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Operating lease costs	$ 3,113	$ 2,704	$ 2,454
Other	2,120	1,769	740
Total lease costs	5,233	4,473	3,194
Operating cash flows for operating leases	2,954	2,762	2,315
ROU assets obtained in exchange for new operating lease liabilities	$ 7,081	$ 1,175	$ 5,195
Weighted-average remaining lease term (in years) (Year)	4 years 8 months 12 days	2 years 1 month 6 days
Weighted-average discount rate	4.30%	2.10%